Komatsu ecot3 PC228US-8 Install guide

HYDRAULIC
EXCAVATOR
SEN05331-05
PC228US
-8
PC228USLC
-8
SERIAL NUMBERS
50001
and up

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PC228US-8,PC228USLC-8 1
(05)
Notice of revision
Notice of revision
5th revision
The affected pages are indicated by the use of the
following marks. It is requested that necessary ac-
tions must be taken to these pages according to the
list below.
2017/02
List of revised pages
Mark Indication Action required
QPage to be newly added Add
qPage to be replaced Replace
( ) Page to be deleted Discard
Mark Page Revision
number Mark Page Revision number Mark Page Revision number Mark Page Revision number
q1 (05) 00-26 (02) 01-21 10-40
2 (04) 00-27 (02) 01-22 10-41
3 (03) 00-28 (02) 10-1 10-42
4 (02) 00-29 (02) 10-2 10-43
q5 (05) 00-30 (02) 10-3 10-44
q6 (05) 00-31 (02) 10-4 10-45
q7 (05) 00-32 (02) 10-5 10-46
8 (02) 00-33 (02) 10-6 10-47
00-1 00-34 (02) 10-7 10-48 (02)
00-2 (02) 00-35 (02) 10-8 10-49
00-3 (01) 00-36 (02) 10-9 10-50
00-3-1 (01) 00-37 (02) 10-10 10-51
00-3-2 (01) 00-38 (02) 10-11 10-52 (02)
00-3-3 (01) 00-39 (02) 10-12 10-53 (02)
00-3-4 (01) 00-40 (02) 10-13 10-54
00-3-5 (02) 00-41 (02) 10-14 10-55
00-3-6 (04) 00-42 (02) 10-15 10-56
00-3-7 (04) 00-43 (02) 10-16 10-57
q00-3-8 (05) 00-44 (02) 10-17 10-58
00-4 (02) 00-45 (02) 10-18 10-59
00-5 (02) 00-46 (02) 10-19 10-60
00-6 (02) 01-1 10-20 10-61
00-7 (02) 01-2 10-21 10-62 (02)
00-8 (02) 01-3 10-22 10-63
00-9 (02) 01-4 (02) 10-23 10-64 (02)
00-10 (02) 01-5 10-24 10-65
00-11 (02) 01-6 (02) 10-25 10-66
00-12 (02) 01-7 10-26 (02) 10-67
00-13 (02) 01-8 (02) 10-27 (02) 10-68
00-14 (02) 01-9 (02) 10-28 (02) 10-69 (02)
00-15 (02) 01-10 10-29 10-70
00-16 (02) 01-11 (02) 10-30 10-71
00-17 (02) 01-12 (02) 10-31 (02) 10-72
00-18 (02) 01-13 10-32 10-73
00-19 (02) 01-14 (02) 10-33 (02) 10-74
00-20 (02) 01-15 10-34 (02) 10-75
00-21 (02) 01-16 10-35 10-76
00-22 (02) 01-17 10-36 10-77
00-23 (02) 01-18 (02) 10-37 10-78
00-24 (02) 01-19 10-38 10-79
00-25 (02) 01-20 10-39 10-80 (02)
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Notice of revision
2PC228US-8,PC228USLC-8
(04)
10-81 10-133 10-185 30-3 (01)
10-82 10-134 10-186 30-4 (02)
10-83 10-135 10-187 30-5 (01)
10-84 10-136 10-188 30-6 (01)
10-85 10-137 10-189 30-6-1 (02)
10-86 10-138 (02) 10-190 30-6-2 (02)
10-87 10-139 10-191 30-7 (01)
10-88 10-140 (02) 10-192 30-8 (01)
10-89 10-141 10-193 30-9 (01)
10-90 10-142 10-194 30-10 (01)
10-91 10-143 10-195 30-11 (01)
10-92 10-144 (02) 10-196 (02) 30-12 (01)
10-93 10-145 10-197 (02) 30-13 (01)
10-94 10-146 10-198 (02) 30-14 (01)
10-95 10-147 10-199 30-15 (01)
10-96 10-148 (03) 10-200 30-16 (01)
10-97 10-149 10-201 30-17 (01)
10-98 10-150 10-202 30-18 (01)
10-99 10-151 10-203 30-19 (01)
10-100 10-152 10-204 30-20 (01)
10-101 10-153 10-205 (02) 30-21 (01)
10-102 10-154 10-206 30-22 (01)
10-103 10-155 10-207 30-23 (01)
10-104 10-156 10-208 30-24 (01)
10-105 10-157 10-209 30-25 (01)
10-106 10-158 10-210 30-26 (01)
10-107 10-159 10-211 (02) 30-27 (01)
10-108 10-160 10-212 30-28 (01)
10-109 10-161 10-213 30-29 (01)
10-110 10-162 10-214 30-30 (01)
10-111 10-163 10-215 30-31 (01)
10-112 10-164 10-216 30-32 (01)
10-113 10-165 10-217 (02) 30-33 (01)
10-114 10-166 10-218 30-34 (01)
10-115 (02) 10-167 10-219 30-35 (01)
10-116 (02) 10-168 10-220 30-36 (01)
10-117 10-169 20-1 (01) 30-37 (01)
10-118 10-170 (03) 20-2 (01) 30-38 (01)
10-119 10-171 (02) 20-3 (01) 30-39 (01)
10-120 10-172 20-4 (01) 30-40 (01)
10-121 10-173 20-5 (01) 30-41 (01)
10-122 10-174 20-6 (01) 30-42 (01)
10-123 (02) 10-175 20-7 (01) 30-43 (01)
10-124 10-176 20-8 (01) 30-44 (01)
10-125 10-177 20-9 (01) 30-45 (01)
10-126 10-178 20-10 (01) 30-46 (01)
10-127 10-179 20-11 (01) 30-47 (01)
10-128 10-180 20-12 (01) 30-48 (01)
10-129 10-181 20-13 (01) 30-49 (01)
10-130 10-182 20-14 (01) 30-50 (01)
10-131 10-183 30-1 (01) 30-51 (02)
10-132 10-184 30-2 (01) 30-52 (01)
Mark Page Revision
number Mark Page Revision
number Mark Page Revision
number Mark Page Revision
number
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PC228US-8,PC228USLC-8 3
(03)
Notice of revision
30-53 (01) 30-105 (01) 40-21 (01) 40-73 (01)
30-54 (01) 30-106 (01) 40-22 (01) 40-74 (01)
30-55 (01) 30-107 (01) 40-23 (01) 40-75 (01)
30-56 (01) 30-108 (01) 40-24 (01) 40-76 (01)
30-57 (01) 30-109 (01) 40-25 (01) 40-77 (01)
30-58 (01) 30-110 (01) 40-26 (01) 40-78 (01)
30-59 (01) 30-111 (01) 40-27 (01) 40-79 (01)
30-60 (01) 30-112 (01) 40-28 (01) 40-80 (01)
30-61 (01) 30-113 (01) 40-29 (01) 40-81 (01)
30-62 (01) 30-114 (01) 40-30 (01) 40-82 (01)
30-63 (01) 30-115 (01) 40-31 (01) 40-83 (01)
30-64 (01) 30-116 (01) 40-32 (01) 40-84 (01)
30-65 (01) 30-117 (01) 40-33 (01) 40-85 (01)
30-66 (01) 30-118 (01) 40-34 (01) 40-86 (01)
30-67 (01) 30-119 (01) 40-35 (01) 40-87 (01)
30-68 (02) 30-120 (01) 40-36 (01) 40-88 (01)
30-69 (01) 30-121 (01) 40-37 (01) 40-89 (01)
30-70 (01) 30-122 (01) 40-38 (01) 40-90 (01)
30-71 (01) 30-123 (01) 40-39 (01) 40-91 (01)
30-72 (01) 30-124 (01) 40-40 (01) 40-92 (01)
30-73 (01) 30-125 (01) 40-41 (01) 40-93 (01)
30-74 (01) 30-126 (01) 40-42 (01) 40-94 (01)
30-75 (01) 30-127 (01) 40-43 (01) 40-95 (01)
30-76 (01) 30-128 (01) 40-44 (01) 40-96 (01)
30-77 (01) 30-129 (01) 40-45 (01) 40-97 (01)
30-78 (01) 30-130 (01) 40-46 (01) 40-98 (01)
30-79 (01) 30-131 (01) 40-47 (01) 40-99 (01)
30-80 (01) 30-132 (01) 40-48 (01) 40-100 (01)
30-81 (01) 30-133 (01) 40-49 (01) 40-101 (01)
30-82 (01) 30-134 (01) 40-50 (01) 40-102 (01)
30-83 (01) 30-135 (01) 40-51 (01) 40-103 (01)
30-84 (01) 30-136 (01) 40-52 (01) 40-104 (01)
30-85 (01) 40-1 (01) 40-53 (01) 40-105 (01)
30-86 (01) 40-2 (01) 40-54 (01) 40-106 (01)
30-87 (01) 40-3 (01) 40-55 (01) 40-107 (01)
30-88 (01) 40-4 (01) 40-56 (01) 40-108 (01)
30-89 (01) 40-5 (01) 40-57 (01) 40-109 (01)
30-90 (01) 40-6 (01) 40-58 (01) 40-110 (01)
30-91 (01) 40-7 (01) 40-59 (01) 40-111 (01)
30-92 (01) 40-8 (01) 40-60 (01) 40-112 (01)
30-93 (01) 40-9 (01) 40-61 (01) 40-113 (01)
30-94 (01) 40-10 (01) 40-62 (01) 40-114 (01)
30-95 (01) 40-11 (01) 40-63 (01) 40-115 (01)
30-96 (01) 40-12 (01) 40-64 (01) 40-116 (01)
30-97 (01) 40-13 (01) 40-65 (01) 40-117 (01)
30-98 (01) 40-14 (01) 40-66 (01) 40-118 (01)
30-99 (01) 40-15 (01) 40-67 (01) 40-119 (01)
30-100 (01) 40-16 (01) 40-68 (01) 40-120 (01)
30-101 (01) 40-17 (01) 40-69 (01) 40-121 (01)
30-102 (01) 40-18 (01) 40-70 (01) 40-122 (01)
30-103 (01) 40-19 (01) 40-71 (01) 40-123 (01)
30-104 (01) 40-20 (01) 40-72 (01) 40-124 (01)
Mark Page Revision
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number Mark Page Revision
number Mark Page Revision
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Notice of revision
4PC228US-8,PC228USLC-8
(03)
40-125 (01) 40-177 (01) 40-229 (01) 40-281 (01)
40-126 (01) 40-178 (01) 40-230 (01) 40-282 (01)
40-127 (01) 40-179 (01) 40-231 (01) 40-283 (01)
40-128 (01) 40-180 (01) 40-232 (01) 40-284 (01)
40-129 (01) 40-181 (01) 40-233 (01) 40-285 (01)
40-130 (01) 40-182 (01) 40-234 (01) 40-286 (01)
40-131 (01) 40-183 (01) 40-235 (01) 40-287 (01)
40-132 (01) 40-184 (01) 40-236 (01) 40-288 (01)
40-133 (01) 40-185 (01) 40-237 (01) 40-289 (01)
40-134 (01) 40-186 (01) 40-238 (01) 40-290 (01)
40-135 (01) 40-187 (01) 40-239 (01) 40-291 (01)
40-136 (01) 40-188 (01) 40-240 (01) 40-292 (01)
40-137 (01) 40-189 (01) 40-241 (01) 40-293 (01)
40-138 (01) 40-190 (01) 40-242 (01) 40-294 (01)
40-139 (01) 40-191 (01) 40-243 (01) 40-295 (01)
40-140 (01) 40-192 (01) 40-244 (01) 40-296 (01)
40-141 (01) 40-193 (01) 40-245 (01) 40-297 (01)
40-142 (01) 40-194 (01) 40-246 (01) 40-298 (01)
40-143 (01) 40-195 (01) 40-247 (01) 40-299 (01)
40-144 (01) 40-196 (01) 40-248 (01) 40-300 (01)
40-145 (01) 40-197 (01) 40-249 (01) 40-301 (01)
40-146 (01) 40-198 (01) 40-250 (01) 40-302 (01)
40-147 (01) 40-199 (01) 40-251 (01) 40-303 (01)
40-148 (01) 40-200 (01) 40-252 (01) 40-304 (01)
40-149 (01) 40-201 (01) 40-253 (01) 40-305 (01)
40-150 (01) 40-202 (01) 40-254 (01) 40-306 (01)
40-151 (01) 40-203 (01) 40-255 (01) 40-307 (01)
40-152 (01) 40-204 (01) 40-256 (01) 40-308 (01)
40-153 (01) 40-205 (01) 40-257 (01) 40-309 (01)
40-154 (01) 40-206 (01) 40-258 (01) 40-310 (01)
40-155 (01) 40-207 (01) 40-259 (01) 40-311 (01)
40-156 (01) 40-208 (01) 40-260 (01) 40-312 (01)
40-157 (01) 40-209 (01) 40-261 (01) 40-313 (01)
40-158 (01) 40-210 (01) 40-262 (01) 40-314 (01)
40-159 (01) 40-211 (01) 40-263 (01) 40-315 (01)
40-160 (01) 40-212 (01) 40-264 (01) 40-316 (01)
40-161 (01) 40-213 (01) 40-265 (01) 40-317 (01)
40-162 (01) 40-214 (01) 40-266 (01) 40-318 (01)
40-163 (01) 40-215 (01) 40-267 (01) 40-319 (01)
40-164 (01) 40-216 (01) 40-268 (01) 40-320 (01)
40-165 (01) 40-217 (01) 40-269 (01) 40-321 (01)
40-166 (01) 40-218 (01) 40-270 (01) 40-322 (01)
40-167 (01) 40-219 (01) 40-271 (01) 40-323 (01)
40-168 (01) 40-220 (01) 40-272 (01) 40-324 (01)
40-169 (01) 40-221 (01) 40-273 (01) 40-325 (01)
40-170 (01) 40-222 (01) 40-274 (01) 40-326 (01)
40-171 (01) 40-223 (01) 40-275 (01) 40-327 (01)
40-172 (01) 40-224 (01) 40-276 (01) 40-328 (01)
40-173 (01) 40-225 (01) 40-277 (01) 40-329 (01)
40-174 (01) 40-226 (01) 40-278 (01) 40-330 (01)
40-175 (01) 40-227 (01) 40-279 (01) 40-331 (01)
40-176 (01) 40-228 (01) 40-280 (01) 40-332 (01)
Mark Page Revision
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number Mark Page Revision
number Mark Page Revision
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(02)
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PC228US-8,PC228USLC-8 5
(05)
Notice of revision
40-333 (01) 40-379 (01) 40-425 (01) 50-25 (02)
40-334 (01) 40-380 (01) 40-426 (01) 50-26 (02)
40-335 (01) 40-381 (01) 40-427 (01) 50-27 (02)
40-336 (01) 40-382 (01) 40-428 (01) 50-28 (02)
40-337 (01) 40-383 (01) 40-429 (01) 50-29 (02)
40-338 (01) 40-384 (01) 40-430 (01) 50-30 (02)
40-339 (01) 40-385 (01) 40-431 (01) 50-31 (02)
40-340 (01) 40-386 (01) 40-432 (01) 50-32 (02)
40-341 (01) 40-387 (01) 40-433 (01) 50-33 (02)
40-342 (01) 40-388 (01) 40-434 (01) 50-34 (02)
40-343 (01) 40-389 (01) 40-435 (01) 50-35 (02)
40-344 (01) 40-390 (01) 40-436 (01) 50-36 (02)
40-345 (01) 40-391 (01) 40-437 (01) 50-37 (02)
40-346 (01) 40-392 (01) 40-438 (01) 50-38 (02)
40-347 (01) 40-393 (01) 40-439 (01) 50-39 (02)
40-348 (01) 40-394 (01) 40-440 (01) 50-40 (02)
40-349 (01) 40-395 (01) 40-441 (01) 50-41 (02)
40-350 (01) 40-396 (01) 40-442 (01) 50-42 (02)
40-351 (01) 40-397 (01) 40-443 (01) 50-43 (02)
40-352 (01) 40-398 (01) 40-444 (01) 50-44 (02)
40-353 (01) 40-399 (01) 40-445 (01) 50-45 (02)
40-354 (01) 40-400 (01) 40-446 (01) 50-46 (02)
40-355 (01) 40-401 (01) 50-1 (02) 50-47 (02)
40-356 (01) 40-402 (01) 50-2 (04) 50-48 (02)
40-357 (01) 40-403 (01) 50-3 (04) 50-49 (02)
40-358 (01) 40-404 (01) 50-4 (02) 50-50 (02)
40-359 (01) 40-405 (01) 50-5 (02) 50-51 (02)
40-360 (01) 40-406 (01) 50-6 (02) 50-52 (02)
40-361 (01) 40-407 (01) 50-7 (02) 50-53 (02)
40-362 (01) 40-408 (01) 50-8 (02) 50-54 (02)
40-363 (01) 40-409 (01) 50-9 (02) 50-55 (02)
40-364 (01) 40-410 (01) 50-10 (02) 50-56 (02)
40-365 (01) 40-411 (01) 50-11 (02) 50-57 (02)
40-366 (01) 40-412 (01) 50-12 (02) 50-58 (02)
40-367 (01) 40-413 (01) 50-13 (02) 50-59 (02)
40-368 (01) 40-414 (01) 50-14 (02) 50-60 (02)
40-369 (01) 40-415 (01) 50-15 (02) 50-61 (02)
40-370 (01) 40-416 (01) 50-16 (02) 50-62 (02)
40-371 (01) 40-417 (01) 50-17 (02) 50-63 (02)
40-372 (01) 40-418 (01) 50-18 (02) 50-64 (02)
40-373 (01) 40-419 (01) 50-19 (02) 50-65 (02)
40-374 (01) 40-420 (01) 50-20 (02) 50-66 (02)
40-375 (01) 40-421 (01) 50-21 (02) 50-67 (02)
40-376 (01) 40-422 (01) 50-22 (02) 50-68 (02)
40-377 (01) 40-423 (01) 50-23 (02) 50-69 (02)
40-378 (01) 40-424 (01) 50-24 (02) 50-70 (02)
Mark Page Revision
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Notice of revision
6PC228US-8,PC228USLC-8
(05)
50-71 (02) 50-117 (02) 50-157 (02) 60-21
50-72 (02) 50-118 (02) 50-158 (02) 60-22
50-73 (02) 50-119 (02) 50-159 (02) 60-23
50-74 (02) 50-120 (02) 50-160 (02) 60-24
50-75 (02) 50-121 (02) 50-161 (02) 60-25
50-76 (02) 50-122 (02) 50-162 (02) 60-26 (02)
50-77 (02) 50-123 (02) 50-163 (02) 60-27 (02)
50-78 (02) 50-124 (02) 50-164 (02) 60-28
50-79 (02) 50-125 (02) 50-165 (02) 60-29
50-80 (02) 50-126 (02) 50-166 (02) 60-30
50-81 (02) 50-127 (02) 50-167 (02) 60-31
50-82 (02) 50-128 (02) 50-168 (02) 60-32 (02)
50-83 (02) 50-129 (02) 50-169 (02) 60-33
50-84 (02) 50-130 (02) 50-170 (02) 60-34
50-85 (02) 50-131 (02) 50-171 (02) 60-35
50-86 (02) 50-132 (02) 50-172 (02) 60-36
50-87 (02) 50-133 (02) 50-173 (02) 60-37
50-88 (02) 50-134 (02) 50-174 (02) 60-38
50-89 (02) 50-134-1 (04) 50-175 (02) 60-39
50-90 (02) 50-134-2 (04) 50-176 (02) 60-40
50-91 (02) 50-134-3 (04) 50-177 (02) 60-41
50-92 (02) 50-134-4 (04) 50-178 (02) 60-42
50-93 (02) 50-134-5 (04) 50-179 (02) 60-43 (02)
50-94 (02) 50-134-6 (04) 50-180 (02) 60-44
50-95 (02) 50-135 (02) 50-181 (02) 60-45 (02)
50-96 (02) 50-136 (02) 50-182 (02) 60-46 (02)
50-97 (02) 50-137 (02) 60-1 60-47
50-98 (02) 50-138 (02) 60-2 60-48
50-99 (02) 50-139 (02) 60-3 60-49
50-100 (02) 50-140 (02) 60-4 60-50
50-101 (02) 50-141 (02) 60-5 60-51
50-102 (02) 50-142 (02) 60-6 60-52
50-103 (02) 50-143 (02) 60-7 60-53
50-104 (02) 50-144 (02) 60-8 60-54
50-105 (02) 50-145 (02) 60-9 60-55
50-106 (02) 50-146 (02) 60-10 60-56
50-107 (02) 50-147 (02) 60-11 60-57
50-108 (02) 50-148 (02) 60-12 60-58
50-109 (02) 50-149 (02) 60-13 60-59
50-110 (02) 50-150 (02) 60-14 60-60
50-111 (02) 50-151 (02) 60-15 60-61
50-112 (02) 50-152 (02) 60-16 60-62
50-113 (02) 50-153 (02) 60-17 (02) 60-63
50-114 (02) 50-154 (02) 60-18 60-64
50-115 (02) 50-155 (02) 60-19 60-65
50-116 (02) 50-156 (02) 60-20 60-66
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PC228US-8,PC228USLC-8 7
(05)
Notice of revision
60-67 80-48 (01) 90-19
60-68 80-49 (01) 90-20
60-69 80-50 (01) 90-21
60-70 80-51 (01) 90-22
80-1 (01) 80-52 (01) 90-23
80-2 (01) 80-53 (01) 90-24
80-3 (01) 80-55 (01) 90-25
80-4 (01) 80-56 (01) 90-26
80-5 (01) 80-57 (01) 90-27
80-6 (01) 80-58 (01) 90-28
80-7 (01) 80-59 (01) 90-29
80-8 (01) 80-60 (01) 90-30
80-9 (01) 80-61 (01) 90-31
80-10 (01) 80-62 (01) 90-32
80-11 (01) 80-63 (01) 90-33
80-12 (01) 80-64 (01) 90-34
80-13 (01) 80-65 (01) 90-35
80-14 (01) 80-66 (01) 90-36
80-15 (01) 80-67 (01) 90-37
80-16 (01) 80-68 (01) 90-38
80-17 (01) 80-69 (01) 90-39
80-18 (01) 80-70 (01) 90-40
80-19 (01) 80-71 (01) 90-41
80-20 (01) 80-72 (01) 90-42
80-21 (01) 80-73 (01) 90-43
80-22 (01) 80-74 (01) 90-44
80-23 (01) 80-75 (01) 90-45
80-24 (01) 80-76 (01) 90-46
80-25 (01) 80-77 (01) 90-47
80-26 (01) 80-78 (01) 1 (04)
80-27 (01) 90-1 2 (04)
80-28 (01) q90-2 (05) 3 (04)
80-29 (01) 90-3 4 (04)
80-30 (01) 90-4 5 (04)
80-31 (01) 90-5 6 (04)
80-32 (01) 90-6 7 (02)
80-33 (01) q90-7 (05) qColophon (05)
80-34 (01) Q90-7-2 (05)
80-35 (01) Q90-7-4 (05)
80-36 (01) Q90-7-6 (05)
80-37 (01) 90-8
80-38 (01) 90-9
80-39 (01) 90-10
80-40 (01) 90-11
80-41 (01) 90-12
80-42 (01) 90-13
80-43 (01) 90-14
80-44 (01) 90-15
80-45 (01) 90-16
80-46 (01) 90-17
80-47 (01) 90-18
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Notice of revision
8PC228US-8,PC228USLC-8
(03)
(02)
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PC228US-8,PC228USLC-8
00-1
PC228US-8,PC228USLC-8
Shop Manual
00-1
HYDRAULIC EXCAVATOR
PC228US-8
PC228USLC-8
Machine model Serial number
PC228US-8 50001 and up
PC228USLC-8 50001 and up
00 Index and foreword 00-1
00-1

Table of Contents
PC228US-8,PC228USLC-8
Table of Contents 00-2
Notice of revision .................................................................................................................... 1
00 Index and Foreword
Table of contents .................................................................................................................... 00 - 2
Table of contents ................................................................................................................. 00 - 2
Foreword and general information.......................................................................................... 00- 4
Safety notice........................................................................................................................ 00- 4
How to read the shop manual.............................................................................................. 00- 9
Explanation of terms for maintenance standard .................................................................. 00- 11
Handling of hydraulic components....................................................................................... 00- 13
Method of disconnecting and connecting push-pull type coupler ........................................ 00- 15
Handling of electric equipment............................................................................................. 00- 18
How to read electric wire code............................................................................................. 00- 28
Precautions when performing work...................................................................................... 00- 31
Standard tightening torque table.......................................................................................... 00- 34
List of Abbreviation .............................................................................................................. 00- 38
Conversion table.................................................................................................................. 00- 42
01 Specification
Specifications.......................................................................................................................... 01- 4
Specifications drawing......................................................................................................... 01- 4
Working range diagram........................................................................................................ 01-5
Specifications....................................................................................................................... 01- 6
Table of weight..................................................................................................................... 01- 16
Table of fuel, coolant and lubricants.................................................................................... 01- 20
10 Structure and function
Engine and cooling system..................................................................................................... 10- 3
Engine related parts............................................................................................................. 10- 3
Cooling system .................................................................................................................... 10- 4
Power train system ................................................................................................................. 10- 7
Power train........................................................................................................................... 10- 7
Swing circle.......................................................................................................................... 10- 8
Swing machinery.................................................................................................................. 10- 10
Final drive ............................................................................................................................ 10- 12
Undercarriage and frame........................................................................................................ 10- 14
Track frame and idler cushion.............................................................................................. 10- 14
Hydraulic system..................................................................................................................... 10- 16
Hydraulic equipment layout drawing.................................................................................... 10- 16
Valve control........................................................................................................................ 10- 18
Hydraulic tank...................................................................................................................... 10- 19
CLSS.................................................................................................................................... 10- 21
Main pump........................................................................................................................... 10- 26
Control valve........................................................................................................................ 10- 48
Function and operation by valve.......................................................................................... 10- 60
Swing motor......................................................................................................................... 10- 97
Travel motor......................................................................................................................... 10-105
PPC valve............................................................................................................................ 10-115
Solenoid valve...................................................................................................................... 10-132
Attachment circuit selector valve ......................................................................................... 10-138
Anti-drop valve..................................................................................................................... 10-142
Multi-control valve................................................................................................................ 10-147
00-2 (02)

Table of Contents
PC228US-8,PC228USLC-8
Center swivel joint................................................................................................................ 10-148
Accumulator......................................................................................................................... 10-149
Work equipment...................................................................................................................... 10-152
Work equipment................................................................................................................... 10-152
Electrical system..................................................................................................................... 10-154
Electronic control system..................................................................................................... 10-154
Machine monitor system...................................................................................................... 10-192
KOMTRAX system............................................................................................................... 10-208
Sensors................................................................................................................................ 10-210
20 Standard value table
Standard value table............................................................................................................... 20- 3
Standard value table for engine........................................................................................... 20- 3
Standard value table for machine........................................................................................ 20- 4
30 Testing and adjusting
Tool for testing, adjusting and troubleshooting....................................................................... 30- 3
Tools for testing, adjusting, and troubleshooting................................................................. 30- 3
Engine and cooling system..................................................................................................... 30- 7
Testing engine speed .......................................................................................................... 30- 7
Testing intake air pressure (boost pressure)....................................................................... 30- 8
Testing exhaust gas color.................................................................................................... 30-9
Testing and adjusting valve clearance................................................................................. 30- 10
Testing compression pressure............................................................................................. 30- 12
Testing blowby pressure...................................................................................................... 30-15
Testing engine oil pressure.................................................................................................. 30-16
Handling fuel system parts .................................................................................................. 30- 17
Releasing remaining pressure from fuel system.................................................................. 30- 18
Testing fuel pressure ........................................................................................................... 30- 19
Cylinder cut-out test mode................................................................................................... 30-22
No-injection cranking........................................................................................................... 30- 23
Checking fuel delivery, return rate and leakage .................................................................. 30- 24
Bleeding air from fuel circuit ................................................................................................ 30- 27
Testing fuel circuit for leakage............................................................................................. 30-28
Testing and adjusting air conditioner compressor belt tension............................................ 30- 29
Replacing fan belt................................................................................................................ 30- 30
Undercarriage and frame........................................................................................................ 30- 31
Testing swing circle bearing clearance................................................................................ 30- 31
Checking and adjusting track tension.................................................................................. 30- 32
Hydraulic system .................................................................................................................... 30- 33
Testing and adjusting oil pressure in work equipment, swing and travel circuits................. 30- 33
Testing control circuit source pressure................................................................................ 30- 37
Testing and adjusting oil pressure in pump PC control circuit............................................. 30- 38
Testing and adjusting oil pressure in pump LS control circuit.............................................. 30- 42
Testing solenoid valve output pressure ............................................................................... 30- 47
Testing PPC valve output pressure ..................................................................................... 30- 50
Adjusting play of work equipment and swing PPC vavles................................................... 30- 52
Testing pump swash plate sensor ....................................................................................... 30- 53
Isolating the parts causing hydraulic drift of work equipment .............................................. 30- 54
Releasing remaining pressure from hydraulic circuit........................................................... 30- 56
Testing oil leakage amount.................................................................................................. 30- 57
Bleeding air from each part.................................................................................................. 30-5
9
Work equipment...................................................................................................................... 30- 61
Replacement procedure of boom angle potentiometer........................................................ 30- 61
(01) 00-3

Table of Contents
PC228US-8,PC228USLC-8
Cab and its attachments .........................................................................................................30-62
Checking cab tipping stopper............................................................................................... 30- 62
Adjusting mirrors.................................................................................................................. 30- 63
Angle adjustment of rear view camera................................................................................. 30- 65
Electrical system..................................................................................................................... 30- 67
Speial function of machine monitor (EMMS)........................................................................ 30- 67
Handling voltage circuit of engine controller........................................................................ 30-123
Preparatory work for troubleshooting of electrical system................................................... 30-124
Procedure for testing diodes................................................................................................ 30-129
Pm clinic.................................................................................................................................. 30- 131
Pm clinic service.................................................................................................................. 30-131
40 Troubleshooting
General information on troubleshooting.................................................................................. 40- 8
Points to remember when troubleshooting .......................................................................... 40- 8
Sequence of events in troubleshooting................................................................................ 40- 9
Checks before troubleshooting............................................................................................ 40- 10
Classification and procedures for troubleshooting............................................................... 40- 34
Failure codes table............................................................................................................... 40- 37
Symptom and troubleshooting numbers.............................................................................. 40- 42
Information in troubleshooting table..................................................................................... 40- 44
Troubleshooting method for open circuit in wiring harness of pressure sensor system ...... 40- 46
Connector list and layout ..................................................................................................... 40- 48
Connection table for connector pin numbers....................................................................... 40- 60
T- branch box and T- branch adapter table ......................................................................... 40- 96
Fuse location table............................................................................................................... 40-100
Troubleshooting by failurecode............................................................................................... 40-102
Failure code [989L00] Engine Controller Lock Caution 1 .................................................... 40-102
Failure code [989M00] Engine Controller Lock Caution 2 ................................................... 40- 102
Failure code [989N00] Engine Controller Lock Caution 3.................................................... 40-103
Failure code [AA10NX] Air Cleaner Clogging...................................................................... 40- 104
Failure code [AB00KE] Charge Voltage Low....................................................................... 40-106
Failure code [B@BAZG] Eng Oil Press Low........................................................................ 40-108
Failure code [B@BAZK] Eng Oil Level Low......................................................................... 40-109
Failure code [B@BCNS] Eng Water Overheat .................................................................... 40-110
Failure code [B@BCZK] Eng Water Level Low ................................................................... 40-112
Failure code [B@HANS] Hyd Oil Overheat.......................................................................... 40-114
Failure code [CA111] ECM Critical Internal Failure............................................................. 40- 115
Failure code [CA115] Eng Ne and Bkup Speed Sens Error ................................................ 40-115
Failure code [CA122] Chg Air Press Sensor High Error...................................................... 40-116
Failure code [CA123] Chg Air Press Sensor Low Error....................................................... 40-118
Failure code [CA131] Throttle Sensor High Error................................................................ 40-120
Failure code [CA132] Throttle Sensor Low Error................................................................. 40- 122
Failure code [CA144] Coolant Temp Sens High Error......................................................... 40- 124
Failure code [CA145] Coolant Temp Sens Low Error.......................................................... 40-126
Failure code [CA153] Chg Air Temp Sensor High Error ...................................................... 40-128
Failure code [CA154] Chg Air Temp Sensor Low Error....................................................... 40- 130
Failure code [CA155] Chg Air Temp High Speed Derate .................................................... 40-132
Failure code [CA187] Sens Supply 2 Volt Low Error........................................................... 40-134
Failure code [CA221] Ambient Press Sens High Error........................................................ 40-136
Failure code [CA222] Ambient Press Sens Low Error......................................................... 40- 138
Failure code [CA227] Sens Supply 2 Volt High Error .......................................................... 40-140
Failure code [CA234] Eng Overspeed................................................................................. 40-141
Failure code [CA238] Ne Speed Sens Supply Volt Error..................................................... 40-142
00-3-1 (01)

Table of Contents
PC228US-8,PC228USLC-8
Failure code [CA271] IMV/PCV1 Short Error....................................................................... 40- 144
Failure code [CA272] IMV/PCV1 Open Error ...................................................................... 40- 146
Failure code [CA322] Inj #1(L#1) Open/Short Error ............................................................ 40-148
Failure code [CA323] Inj #5 (L#5) Open/Short Error ........................................................... 40- 150
Failure code [CA324] Inj #3(L#3) Open/Short Error ............................................................ 40-152
Failure code [CA325] Inj #6 (L#6) Open/Short Error ........................................................... 40- 154
Failure code [CA331] Inj #2(L#2) Open/Short Error ............................................................ 40-156
Failure code [CA332] Inj #4(L#4) Open/Short Error ............................................................ 40-158
Failure code [CA342] Calibration Code Incompatibility ....................................................... 40- 160
Failure code [CA351] Injectors Drive Circuit Error............................................................... 40- 161
Failure code [CA352] Sens Supply 1 Volt Low Error........................................................... 40-162
Failure code [CA386] Sens Supply 1 Volt High Error .......................................................... 40-164
Failure code [CA428] Water in Fuel Sensor High Error....................................................... 40-166
Failure code [CA429] Water in Fuel Sensor Low Error........................................................ 40- 168
Failure code [CA435] Eng Oil Press Sw Error..................................................................... 40-170
Failure code [CA441] Battery Voltage Low Error................................................................. 40-172
Failure code [CA442] Battery Voltage High Error................................................................ 40-174
Failure code [CA449] Rail Press Very High Error................................................................ 40-175
Failure code [CA451] Rail Press Sensor High Error............................................................ 40-176
Failure code [CA452] Rail Press Sensor Low Error............................................................. 40-178
Failure code [CA488] Chg Air Temp High Torque Derate................................................... 40-180
Failure code [CA553] Rail Press High Error........................................................................ 40-181
Failure code [CA559] Rail Press Low Error......................................................................... 40-182
Failure code [CA689] Eng Ne Speed Sensor Error............................................................. 40-184
Failure code [CA731] Eng Bkup Speed Sens Phase Error.................................................. 40-186
Failure code [CA757] All Continuous Data Lost Error ......................................................... 40-187
Failure code [CA778] Eng Bkup Speed Sensor Error.......................................................... 40- 188
Failure code [CA1633] KOMNET Datalink Timeout Error.................................................... 40-191
Failure code [CA2185] Throt Sens Sup Volt High Error ...................................................... 40-192
Failure code [CA2186] Throt Sens Sup Volt Low Error ....................................................... 40-193
Failure code [CA2249] Rail Press Very Low Error............................................................... 40- 194
Failure code [CA2311] IMV Solenoid Error.......................................................................... 40-195
Failure code [CA2555] Grid Htr Relay Open Circuit Error ................................................... 40-196
Failure code [CA2556] Grid Htr Relay Short Circuit Error ................................................... 40-198
Failure code [D110KB] Battery Relay Drive Short Circuit.................................................... 40-200
Failure code [D19JKZ] Personal Code Relay Abnormality.................................................. 40-202
Failure code [D862KA] GPS Antenna Open Circuit............................................................. 40-204
Failure code [DA22KK] Pump Solenoid Power Low Error................................................... 40- 206
Failure code [DA25KP] 5V Sensor1 Power Abnormality..................................................... 40-208
Failure code [DA26KP] 5V Sensor2 Power Abnormality..................................................... 40-210
Failure code [DA29KQ] Model Selection Abnormality......................................................... 40-214
Failure code [DA2RMC] CAN Discon (Pump Con Detected) .............................................. 40-217
Failure code [DAF8KB] Camera Power Supply Short Circuit .............................................. 40- 222
Failure code [DAFGMC] GPS Module Error........................................................................ 40-224
Failure code [DAFRMC] CAN Discon (Monitor Detected) ................................................... 40- 226
Failure code [DGH2KB] Hyd Oil Sensor Short .................................................................... 40- 230
Failure code [DHPAMA] Pump Press Sensor Abnormality.................................................. 40-232
Failure code [DHPBMA] R Pump Press Sensor Abnormality.............................................. 40-234
Failure code [DHS3MA] Arm IN PPC Sen. Abnormality...................................................... 40-236
Failure code [DHS4MA] Bucket CURL PPC Press Sensor Abnormality ............................. 40- 238
Failure code [DHS8MA] Boom RAISE PPC Press Sensor Abnormality.............................. 40-240
Failure code [DHSAMA] Swing RH PPC Press Sensor Abnomality.................................... 40-242
Failure code [DHSBMA] Swing LH PPC Press Sensor Abnomality .................................... 40-244
Failure code [DHSDMA] Bucket Dump PPC Press Sensor Abnormality............................. 40- 246
(01) 00-3-2

Table of Contents
PC228US-8,PC228USLC-8
Failure code [DHSFMA] Travel FW L PPC Press Sensor Abnormality ............................... 40- 248
Failure code [DHSGMA] Travel FW R PPC Press Sensor Abnormality.............................. 40-250
Failure code [DHSHMA] Travel BW L PPC Press Sensor Abnormality............................... 40-252
Failure code [DHSJMA] Travel BW R PPC Press Sensor Abnormality............................... 40-254
Failure code [DHX1MA] Overload Sensor Abnormality ....................................................... 40-257
Failure code [DKA0KA] Boom Angle Sensor Open Circuit.................................................. 40-260
Failure code [DKA0KB] Boom Angle Sensor Power Short Circuit....................................... 40-262
Failure code [DKA0PH] Boom Angle Sensor Install Abnormality ........................................ 40-264
Failure code [DKR0MA] F pump S/P sensor Abnormality ................................................... 40-266
Failure code [DKR1MA] R pump S/P sensor Abnormality................................................... 40-268
Failure code [DV20KB] Travel Alarm Short Circuit.............................................................. 40- 270
Failure code [DW43KA] Travel Speed Sol Open Circuit...................................................... 40-272
Failure code [DW43KB] Travel Speed Sol Short Circuit...................................................... 40- 274
Failure code [DW45KA] Swing Brake Sol Open Circuit....................................................... 40-276
Failure code [DW45KB] Swing Brake Sol Short Circuit....................................................... 40-278
Failure code [DW4GKA] Boom Slow Down Sol. Disc.......................................................... 40- 280
Failure code [DW4GKB] Boom Slow Down Sol. Short Circuit ............................................. 40- 282
Failure code [DW4WKA] Cancel Bucket Dump Open Circuit.............................................. 40- 284
Failure code [DW4WKB] Cancel Bucket Dump Short Circuit .............................................. 40-286
Failure code [DW91KA] Travel Junction Sol. Disc............................................................... 40-288
Failure code [DW91KB] Travel Junction Sol. S/C................................................................ 40-290
Failure code [DWA2KA] Attachment Sol Open Circuit......................................................... 40-292
Failure code [DWA2KB] Attachment Sol Short Circuit......................................................... 40- 294
Failure code [DWK0KA] 2-stage Relief Sol Open Circuit..................................................... 40-296
Failure code [DWK0KB] 2-stage Relief Sol Short Circuit..................................................... 40-298
Failure code [DXA8KA] PC-EPC (F) Sol Open Circuit......................................................... 40- 300
Failure code [DXA8KB] PC-EPC (F) Sol Short Circuit......................................................... 40-302
Failure code [DXA9KA] PC-EPC (R) Sol Open Circuit ........................................................ 40-304
Failure code [DXA9KB] PC-EPC (R) Sol Short Circuit ........................................................ 40-306
Failure code [DXE0KA] LS-EPC Sol Open Circuit............................................................... 40-308
Failure code [DXE0KB] LS-EPC Sol Short Circuit............................................................... 40-310
Failure code [DXE4KA] Service Current EPC Disc.............................................................. 40-312
Failure code [DXE4KB] Service Current EPC S/C............................................................... 40-314
Failure code [DXE5KA] Merge-divider Main Sol Open Circuit............................................. 40-316
Failure code [DXE5KB] Merge-divider Main Sol Short Circuit............................................. 40-318
Failure code [DXE6KA] Merge-divider LS Sol Open Circuit ................................................ 40-320
Failure code [DXE6KB] Merge-divider LS Sol Short Circuit................................................. 40-322
Failure code [DY20KA] Wiper Working Abnormality............................................................ 40-324
Failure code [DY20MA] Wiper Parking Abnormality............................................................ 40- 326
Failure code [DY2CKA] Washer drive discon...................................................................... 40-328
Failure code [DY2CKB] Washer drive short......................................................................... 40-330
Failure code [DY2DKB] Wiper Drive (Fwd) Short Circuit..................................................... 40- 332
Failure code [DY2EKB] Wiper Drive (Rev) Short Circuit...................................................... 40-334
Troubleshooting of electrical system (E-mode)....................................................................... 40-337
E-1 Engine does not start (Engine does not crank)............................................................. 40- 337
E-2 Preheater does not operate........................................................................................... 40-342
E-3 When starting switch is turned to ON position, machine monitor displays nothing ....... 40-347
E-4 When starting switch is turned to ON position (before starting engine), basic check monitor lights up.
............................................................................................................................................. 40- 350
E-5 Precaution monitor lights up while engine is running.................................................... 40-351
E-6 Emergency stop monitor lights up while engine is running ........................................... 40-353
E-7 Fuel level gauge does not indicate correctly................................................................. 40- 354
E-8 Engine coolant temperature gauge does not indicate correctly .................................... 40-356
E-9 Hydraulic oil temperature gauge does not indicate correctly......................................... 40- 358
00-3-3 (01)

Table of Contents
PC228US-8,PC228USLC-8
E-10 Displays on machine monitor are different from those for actual machine ................. 40-361
E-11 Some areas of machine monitor screen are not displayed......................................... 40-361
E-12 Function switch does not operate ............................................................................... 40-361
E-13 Automatic warm-up system does not operate (in cold season) .................................. 40- 362
E-14 Auto-decelerator does not operate properly................................................................ 40-363
E-15 Working mode does not change ................................................................................. 40-364
E-16 Travel speed does not change.................................................................................... 40-365
E-17 Alarm buzzer cannot be canceled............................................................................... 40- 366
E-18 When starting switch is turned OFF, service meter is not displayed........................... 40-366
E-19 Service mode cannot be selected............................................................................... 40-367
E-20 Any of work equipment, swing and travel do not operate or cannot be locked........... 40-368
E-21 Swing brake does not operate properly ...................................................................... 40-371
E-22 One-touch power maximizing function does not operate properly.............................. 40-374
E-23 Travel alarm does not sound or does not stop sounding ............................................ 40-377
E-24 Horn does not sound or does not stop........................................................................ 40-378
E-25 Windshield wiper and window washer do not operate ................................................ 40-380
E-26 BOOM LOWER indicator is not displayed properly with monitoring function.............. 40-382
E-27 ARM OUT indicator is not displayed properly with monitoring function ...................... 40- 384
E-28 ARM IN indicator is not displayed properly with monitoring function .......................... 40- 386
E-29 BOOM RAISE indicator is not displayed properly with monitoring function ................ 40-386
E-30 BUCKET CURL indicator is not displayed properly with monitoring function.............. 40-386
E-31 BUCKET DUMP indicator is not displayed properly with monitoring function............. 40-387
E-32 SWING indicator is not displayed properly with monitoring function........................... 40-387
E-33 TRAVEL indicator is not displayed properly with monitoring function......................... 40- 387
E-34 ATTACHMENT indicator is not displayed properly with monitoring function .............. 40-388
E-35 Attachment hydraulic circuit cannot be changed......................................................... 40-390
E-36 KOMTRAX system does not operate properly............................................................ 40-391
Troubleshooting of hydraulic and mechanical system (H-mode)............................................ 40- 393
Information in troubleshooting table..................................................................................... 40-393
System chart for hydraulic and mechanical systems........................................................... 40-394
Failure mode and cause table ............................................................................................. 40-396
H- 1 All of work equipment, swing and travel work slow or lack power ............................... 40- 398
H- 2 Engine speed lowers significantly or engine stalls....................................................... 40-400
H- 3 Any of work equipment,swing and travel does not work.............................................. 40-401
H- 4 Unusual sound is heard from around hydraulic pump ................................................. 40-401
H- 5 Fine control performance or response is poor ............................................................. 40-402
H- 6 Boom operation lacks speed or power......................................................................... 40- 403
H- 7 Arm operation lacks speed or power ........................................................................... 40-404
H- 8 Bucket operation lacks speed or power....................................................................... 40-405
H- 9 Work equipment does not move in single operation.................................................... 40-405
H-10 Hydraulic drift of work equipment is large................................................................... 40-406
H-11 Time lag of work equipment is large........................................................................... 40-408
H-12 Other work equipment moves when one of work equipment is relieved..................... 40- 408
H-13 One-touch power maximizing function does not work ................................................ 40-409
H-14 In combined operation of work equipment , equipment having heavier load moves slower.
............................................................................................................................................. 40-409
H-15 In combined operation of swing and boom RAISE, boom rising speed is low............ 40-410
H-16 Travel speed drops largely in combined operation of swing and travel ...................... 40-410
H-17 Machine does not travel straight................................................................................. 40- 411
H-18 Travel speed is low ..................................................................................................... 40-412
H-19 Machine is hard to steer or travel power is low........................................................... 40-413
H-20 Travel speed does not change, or travel speed is too low or high.............................. 40-414
H-21 One of tracks does not run.......................................................................................... 40-415
H-22 Upper structure does not swing .................................................................................. 40-416
(01) 00-3-4

Table of Contents
PC228US-8,PC228USLC-8
H-23 Swing acceleration is poor or swing speed is low....................................................... 40- 418
H-24 Upper structure overruns excessively when it stops swinging.................................... 40-420
H-25 Shock is large when upper structure stops swinging.................................................. 40-421
H-26 Large unusual noise is heard when upper structure stops swinging........................... 40-421
H-27 Swing drift on a slope is large..................................................................................... 40-422
H-28 Attachment circuit cannot be changed........................................................................ 40-423
H-29 Oil flow in attachment circuit cannot be controlled...................................................... 40-423
Troubleshooting of engine (S-mode) ...................................................................................... 40-424
Method of using troubleshooting chart................................................................................. 40-424
S-1 Startability is poor.......................................................................................................... 40-428
S-2 Engine does not start .................................................................................................... 40-429
S-3 Engine does not pick up smoothly................................................................................. 40-432
S-4 Engine stops during operation....................................................................................... 40-433
S-5 Engine runs rough or is unstable................................................................................... 40-434
S-6 Engine lacks power....................................................................................................... 40-435
S-7 Exhaust smoke is black (incomplete combustion)......................................................... 40- 436
S-8 Oil consumption is excessive (or exhaust smoke is blue)............................................. 40-437
S-9 Oil becomes contaminated early................................................................................... 40- 438
S-10 Fuel consumption is excessive.................................................................................... 40-439
S-11 Oil is in coolant (or coolant spurts or coolant level goes down) .................................. 40-440
S-12 Oil pressure drops....................................................................................................... 40-441
S-13 Oil level rises (coolant or fuel in oil)............................................................................. 40-442
S-14 Coolant temperature rises too high (overheating)....................................................... 40-443
S-15 Unusual noise is made................................................................................................ 40-444
S-16 Vibration is excessive.................................................................................................. 40-445
50 Disassembly and assembly
General information on disassembly and assembly ............................................................... 50- 4
How to read Disassembly and Assembly............................................................................. 50- 4
Coating materials list............................................................................................................ 50- 6
Special tools list................................................................................................................... 50- 9
Sketches of special tools ..................................................................................................... 50- 13
Engine and cooling system..................................................................................................... 50- 18
Removal and installation of fuel supply pump assembly ..................................................... 50- 18
Removal and installation of fuel injector assembly.............................................................. 50- 22
Removal and installation of cylinder head assembly........................................................... 50- 29
Removal and installation of radiator assembly .................................................................... 50- 44
Removal and installation of hydraulic oil cooler assembly................................................... 50- 47
Removal and installation of aftercooler assembly................................................................ 50- 49
Removal and installation of engine assembly...................................................................... 50- 52
Removal and installation of engine front seal...................................................................... 50- 56
Removal and installation of engine rear seal....................................................................... 50- 58
Removal and installation of fuel cooler assembly................................................................ 50- 61
Removal and installation of fuel tank assembly................................................................... 50- 63
Power train.............................................................................................................................. 50- 66
Removal and installation of travel motor and final drive assembly ...................................... 50- 66
Disassembly and assembly of final drive assembly............................................................. 50- 67
Removal and installation of swing motor and swing machinery assembly .......................... 50- 75
Disassembly and assembly of swing machinery assembly ................................................. 50- 77
Removal and installation of swing circle assembly.............................................................. 50- 85
Undercarriage and frame........................................................................................................ 50- 86
Separation and connection of track shoe assembly ............................................................ 50- 86
Removal and installation of idler and idler cushion assembly.............................................. 50- 88
Disassembly and assembly of idler assembly ..................................................................... 50- 89
00-3-5 (02)

Table of Contents
PC228US-8,PC228USLC-8
Disassembly and assembly of idler cushion assembly........................................................ 50- 92
Disassembly and assembly of track roller assembly ........................................................... 50- 94
Disassembly and assembly of carrier roller assembly......................................................... 50- 96
Removal and installation of revolving frame assembly........................................................ 50- 99
Removal and installation of counterweight assembly.......................................................... 50-101
Removal and installation of maintenance counterweight assembly .................................... 50-103
Hydraulic system .................................................................................................................... 50-106
Removal and installation of center swivel joint assembly.................................................... 50- 106
Disassembly and assembly of center swivel joint assembly................................................ 50- 109
Removal and installation of hydraulic tank assembly .......................................................... 50-111
Removal and installation of main pump assembly............................................................... 50-113
Removal and installation of main pump input shaft oil seal................................................. 50-117
Removal and installation of control valve assembly............................................................ 50- 118
Disassembly and assembly of control valve assembly........................................................ 50- 123
Disassembly and assembly of work equipment PPC valve assembly................................. 50-127
Disassembly and assembly of travel PPC valve assembly ................................................. 50-129
Work equipment...................................................................................................................... 50-132
Removal and installation of work equipment assembly....................................................... 50-132
Removal and installation of anti-drop valve assembly for boom.......................................... 50- 134-1
Removal and installation of anti-drop valve assembly for arm ............................................ 50-134-4
Disassembly and assembly of anti-drop valve assembly .................................................... 50-134-6
Disassembly and assembly of work equipment cylinder assembly ..................................... 50-135
Cab and its attachments......................................................................................................... 50-142
Removal and installation of operator's cab assembly.......................................................... 50- 142
Removal and installation of operator's cab glass (adhered window glass).......................... 50-146
Removal and installation of front window assembly............................................................ 50- 156
Removal and installation of floor frame assembly ............................................................... 50- 157
Removal and installation of air conditioner unit assembly................................................... 50-164
Electrical system..................................................................................................................... 50- 170
Removal and installation of air conditioner compressor assembly...................................... 50-170
Removal and installation of air conditioner condenser assembly........................................ 50-172
Removal and installation of engine controller assembly...................................................... 50- 173
Removal and installation of pump controller assembly........................................................ 50- 175
Removal and installation of machine monitor assembly...................................................... 50- 178
Removal and installation of pump swash plate sensor........................................................ 50- 180
Removal and installation of KOMTRAX terminal assembly................................................. 50- 181
60 Maintenance standard
Engine and cooling system..................................................................................................... 60- 4
Engine mount....................................................................................................................... 60- 4
Cooling system.................................................................................................................... 60- 5
Power train.............................................................................................................................. 60- 6
Swing circle.......................................................................................................................... 60- 6
Swing machinery ................................................................................................................. 60- 8
Final drive ............................................................................................................................ 60- 10
Sprocket............................................................................................................................... 60- 12
Undercarriage and frame........................................................................................................ 60- 14
Track frame and idler cushion ............................................................................................. 60- 14
Idler...................................................................................................................................... 60- 16
Track roller........................................................................................................................... 60- 18
Carrier roller......................................................................................................................... 60- 19
Track shoe........................................................................................................................... 60- 20
Hydraulic system .................................................................................................................... 60- 25
Hydraulic tank...................................................................................................................... 60- 25
(04) 00-3-6

Table of Contents
PC228US-8,PC228USLC-8
Main pump ........................................................................................................................... 60- 26
Control valve........................................................................................................................ 60- 29
Swing motor......................................................................................................................... 60- 39
Travel motor......................................................................................................................... 60- 41
PPC valve............................................................................................................................ 60- 45
Solenoid valve...................................................................................................................... 60- 53
Attachment circuit selector valve ......................................................................................... 60- 55
Anti-drop valve..................................................................................................................... 60- 58
Center swivel joint................................................................................................................ 60- 60
Work equipment...................................................................................................................... 60- 62
Work equipment................................................................................................................... 60- 62
Dimensions of components.................................................................................................. 60- 64
Work equipment cylinder ..................................................................................................... 60- 68
80 Appendix
Air conditioner......................................................................................................................... 80- 3
Precautions for refrigerant ................................................................................................... 80- 3
Air conditioner component................................................................................................... 80- 4
Configuration and function of refrigeration cycle.................................................................. 80- 6
Outline of refrigeration cycle................................................................................................ 80- 8
Air conditioner unit............................................................................................................... 80- 10
Air conditioner controller...................................................................................................... 80- 15
Compressor ......................................................................................................................... 80- 16
Condenser and Modulator ................................................................................................... 80- 17
Sensor.................................................................................................................................. 80- 18
Procedure for testing and troubleshooting........................................................................... 80- 20
Circuit diagram and arrangement of connector pins............................................................ 80- 22
System diagram................................................................................................................... 80- 24
Detail of air conditioner unit ................................................................................................. 80- 26
Parts and connectors layout ................................................................................................ 80- 28
Testing air leakage (duct) .................................................................................................... 80- 32
Testing with self-diagnosis function..................................................................................... 80- 33
Testing vent (mode) changeover......................................................................................... 80- 36
Testing FRESH/RECIRC air changeover ............................................................................ 80- 37
Testing inner sensor ............................................................................................................ 80- 38
Testing outer sensor............................................................................................................ 80- 39
Testing sunlight sensor........................................................................................................ 80- 40
Testing (dual) pressure switch for refrigerant ...................................................................... 80- 41
Testing relays....................................................................................................................... 80- 42
Troubleshooting chart 1 ....................................................................................................... 80- 44
Troubleshooting chart 2 ....................................................................................................... 80- 46
Information in troubleshooting table..................................................................................... 80- 48
Troubleshooting for power supply and CAN communication system (Air conditioner does not
operate)................................................................................................................................ 80- 50
Troubleshooting for compressor and refrigerant system (Air is not cooled) ........................ 80- 54
Troubleshooting for blower motor system (No air comes out or air flow is abnormal)......... 80- 57
Troubleshooting for temperature control.............................................................................. 80- 60
Troubleshooting for vent (mode) changeover...................................................................... 80- 62
Troubleshooting for FRESH/RECIRC air changeover......................................................... 80- 64
Troubleshooting for temperature sensor system ................................................................. 80- 66
Troubleshooting with gauge pressure.................................................................................. 80- 68
Connection of service tool.................................................................................................... 80- 70
Precautions for disconnecting and connecting air conditioner piping.................................. 80- 72
Handling of compressor oil .................................................................................................. 80- 74
00-3-7 (04)