Kubota 2491 User manual

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ASSEMBLY MANUAL
Keep With Operator's Manual
TRACTOR & LOADER GENERAL INFORMATION
Mounting brackets can be installed using tools ordinarily
available. Shut off tractor engine and engage tractor
brakes during installation.
After loader is installed, check to be sure front tires clear
loader and mounting brackets in all possible positions.
If tractor is equipped with a front weight bracket, remove
it before installing loader mounting brackets.
PREPARING TRACTOR BEFORE LOADER
MOUNTING BRACKET INSTALLATION
1. Temporarily remove tractor hood side panels.
2. Remove 14mm bolt and round spacer on right side of
tractor (see illustration below). Mount plate will
replace spacer.
NOTE: Leave all attaching hardware loose until
mounting brackets are completely assembled to
facilitate assembly and proper alignment. Tighten all
hardware to torque specifications in loader operators
manual.
INSTALLING LOADER MOUNTING BRACKETS
(Figure 1)
1. Install front mounting bracket (1) using 14mm x
40mm cap screws (7) and 9/16" lock washers (10) to
front of tractor frame.
2. Slide right mounting bracket (3) between
transmission casting and hood support frame,
replacing spacer removed earlier. Fasten right mid
mounting bracket (3) to tractor casting and frame
using 16mm x 45mm cap screws (6) and 5/8" lock
washers (8) in circular holes, and 16mm x 45mm cap
screws (6), 5/8" lock washers (8), and 5/8" flat
washers (9) in slotted holes. Fasten rear of right mid
mounting bracket (3) to rear frame of tractor using
5/8 x 2" cap screws (11), 5/8" flat washers (9) and
5/8" lock nut (12). Repeat procedure to fasten left
mid mounting bracket (2) to left side of tractor.
3. Reinstall hood side panels.
RELOCATING TRACTOR CAB SIDE MARKER
LIGHTS
Relocate amber lights located at sides of front of cab to
avoid interference with loader uprights.
NOTE: This procedure applies only to tractors equipped
with a cab. Light adapter plate (5) and attaching
hardware (15, 16 & 17) are not used on tractors without
cab.
1. Temporarily remove amber lights from mounting
brackets on cab, saving attaching hardware for
reuse.
2. Attach light adapter plate (5) to tractor cab using two
1/4 x 3/4" cap screws (15), 1/4 flat washers (16), and
lock nuts (17).
3. Fasten lights to adapter plate (5) using original
attaching hardware.
MODEL 4WD LESS CAB WITH CAB
L4330 FST, GST, HST X X X
L4630 FST, GST, HST X X X
L5030 GST, HST X X X
MOUNTING KIT
2491 LOADER
KUBOTA TRACTORS
Spacer
(Remove)
Hood
Support
Frame

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WARNING
TOWING HERE WILL PULL FRONT
LOADER SUPPORT OUT OF POCKET
CAUSING DAMAGE AND POSSIBLE
INJURY.
DO NOT USE FOR TOWING
NOTE: On tractors with cab, reposition cab
side marker lights at front of cab to avoid
interference with loader upright. Install
light adapter plate (11) using 1/4 x 3/4 cap
screws (23), 1/4 flat washers and 1/4 lock
nuts (24).
17
5
5
2
16
15
8
6
9
8
6
10
10
7
7
1
9
96
8
8
6
38
12
13
19
19
18
14
4
9
11

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INSTALLING LIFT CYLINDERS
1. Install grease fittings (19), into threaded holes in base
and rod ends of lift cylinders (18). Install grease
fittings (19) so they are opposite cylinder ports.
WARNING: Be sure to support loader
using an overhead hoist. Installed lift
cylinders will not support loader in upright
position. Boom may fall causing serious
personal injury.
2. Loop nylon strap around center of boom cross
member. Using overhead hoist to support loader,
temporarily remove cap screws and pins which
secure shipping braces.
3. Install lift cylinders (18), with base end connected to
boom arm and hydraulic ports toward boom arm,
using hardware removed earlier when shipping
braces were removed.
NOTE: Pin rod ends of cylinders into loader uprights
first, then pin base end to loader boom arms.
Refer to the following illustration for an explanation of
cylinder rod attachment options.
4. One hose at a time, to avoid error when reconnecting,
disconnect lift cylinder hoses from loader boom oil
lines, connect to lift cylinders, and then reconnect to
loader boom oil lines.
NOTE: Lift cylinder hoses must be free to rotate while
being connected to lift cylinder ports.
PARTS LIST - MOUNTING KIT
Item Part No. Description Qty.
1 50900 BRACKET, Front Mounting 1
2 51322 BRACKET, Mid Mounting, Left 1
3 51323 BRACKET, Mid Mounting, Right 1
4 51244 YOKE, with Decals 1
5 48808 PLATE, Light adapter 2
6 42672-66 SCREW, Cap, 16mm-1.50 x 45mm 18
7 42672-23 SCREW, Cap, 14mm-1.50 x 40mm 4
8 41837-7 WASHER, Lock, 5/8" 18
9 42502-12 WASHER, Flat, 5/8" 18
10 41837-6 WASHER, Lock, 9/16" 4
11 41838-27 SCREW, Cap, 5/8-11 x 2" 4
12 41840-7 NUT, Lock, 5/8-11 4
13 41838-7 SCREW, Cap, 3/4-10 x 2-1/2" 4
14 41840-8 NUT, Lock, 3/4-10 4
15 41838-20 SCREW, Cap, 1/4-20 x 3/4" 4
16 42502-6 WASHER, Flat, 1/4" 4
17 41840-11 NUT, Lock, 1/4-20 4
18 43218 CYLINDER, Lift, 2-3/4" nominal O.D. 2
19 6075-4 FITTING, Grease, 1/4-28 Straight 4
20 39240 DECAL, Do not tow ... 2
Loader Upright
Refer to operator’s manual
for specifications in each
cylinder mounting position.
Decreases lift capacity while
increasing lift height by 12"
Nylon Strap
Remove cap screws
and pins, which
secure shipping braces.

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INSTALLING YOKE ONTO LOADER
WARNING: Be sure to support loader
using an overhead hoist. Installed lift
cylinders will not support loader in upright
position. Boom may fall causing serious
personal injury.
Install yoke assembly (4) using 3/4 x 2-1/2 cap screws
(13) and 3/4 lock nuts (14). Install rear cap screws first,
then swing yoke into position and install front cap
screws.
NOTE: Tighten hardware connecting yoke to loader
side frames snug, but do not torque completely. After
loader has been mounted to tractor and aligned with mid
mounting brackets and front mounting brackets, torque
hardware to 239-262 ft.·lb.
INSTALLING LOADER TO MOUNTING
BRACKETS
WARNING: To avoid injury during installation
of quick attach loader, do not permit
bystanders within ten feet of loader.
1. Remove hardware which secures loader to pallet.
Using overhead hoist, lower loader from vertical
shipping position to horizontal position (use scraps
of cardboard to protect paint).
2. Install hose or valve kit to tractor and loader. Refer to
installation instructions provided with hose or valve
kit.
3. Reposition overhead hoist by looping nylon strap
around yoke near loader side frames at balance
point of loader.
4. Using overhead hoist, raise loader until side frame
uprights will clear front tires. Temporarily remove
lock nut and washer from loader hinges and swing
each hinge open.
5. Position loader so hinges hook over mid mounting
tubes and yoke tube fits inside front mounting
bracket.
6. Clamp hinges to mid mounting tubes with 3/4 flat
washers and 3/4 flex-lock nuts (supplied with
loader).
IMPORTANT: Be sure to use flex-lock nuts to clamp
hinge. Tighten flex-lock nuts against hinge securely,
but not to more than 125 ft.·lb. torque.
7. Adjust front wheel tread settings or steering stops, if
necessary to prevent interference between tires and
loader. Refer to tractor operator's manual for
adjustment procedures.
INSTALLING BUCKET
Refer to instructions provided with bucket or loader
attachment to install bucket or attachment onto loader.
INSTALLING BUCKET LEVEL INDICATOR
1. Attach indicator guide tube to cylinder pin. Attach
guide tube positioned to outside of boom.
Balance point
of loader
Hinge open
Fasten rear
bolt first.
Swing yoke
into position.

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INSTALLING BUCKET LEVEL INDICATOR
(Continued)
2. Slide bucket level indicator rod through guide tube.
Attach other end of rod with 1/8 x 1 cotter pins and 3/8
flat washers.
3. Locate tractor and loader on level surface. With
bottom of bucket resting on surface, cut off excess
rod flush with end of guide tube or paint exposed rod
a contrasting color.

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AMERICAN STANDARD CAP SCREWS METRIC CAP SCREWS
SAE Grade 5 8 Metric Class 8.8 10.9
Cap Screw TORQUE TORQUE Cap Screw TORQUE TORQUE
Size FT-LBS Nm FT-LBS Nm Size FT-LBS Nm FT-LBS Nm
Inches MIN MAX MIN MAX MIN MAX MIN MAX Millimeters MIN MAX MIN MAX MIN MAX MIN MAX
1/4-20 6.25 7.25 8.5 10 8.25 9.5 11 13 M6x100 6 8 8 11 9 11 12 15
1/4-28 8 9 11 12 10.5 12 14 16 M8 x 1.25 16 20 215 27 23 27 31 36.5
5/16 - 18 14 15 19 20 18.5 20 25 27 M10 x 1.50 29 35 39 47 42 52 57 70
5/16 - 24 17.5 19 23 26 23 25 31 34 M12 x 1.75 52 62 70 84 75 91 102 123
3/8 - 16 26 28 35 38 35 37 47.5 50 M14 x 2.00 85 103 115 139 120 146 163 198
3/8 - 24 31 34 42 46 41 45 55.5 61 M16 x 2.50 130 158 176 214 176 216 238 293
7/16 - 14 41 45 555 61 55 60 74.5 81 M18 x 2.50 172 210 233 284 240 294 325 398
7/16 - 20 51 55 69 745 68 75 92 102 M20 x 2.50 247 301 335 408 343 426 465 577
½ - 13 65 72 88 975 86 96 116 130 M22 x 2.50 332 404 450 547 472 576 639 780
½ - 20 76 84 103 114 102 112 138 152 M24 x 3.00 423 517 573 700 599 732 812 992
9/16 - 12 95 105 129 142 127 140 172 190 M27 x 3.00 637 779 863 1055 898 1098 1217 1488
9/16 - 18 111 123 150 167 148 164 200 222 M30 x 3.00 872 1066 1181 1444 1224 1496 1658 2027
5/8 - 11 126 139 171 188 168 185 228 251
NOTE: These values apply to fasteners as
received from the supplier, dry or when lubricated
with normal engine oil. They do not apply if special
graphite or molydisulphide greases or other
extreme pressure lubricants are used.
5/8 - 18 152 168 206 228 203 224 275 304
¾ - 10 238 262 322 355 318 350 431 474
¾ - 16 274 305 371 409 365 402 495 544
7/8 - 9 350 386 474 523 466 515 631 698
7/8 -14 407 448 551 607 543 597 736 809
1 - 8 537 592 728 802 716 790 970 1070
1 - 14 670 740 908 1003 894 987 1211 1337
GENERAL TORQUE SPECIFICATIONS
USE THE FOLLOWING TORQUES WHEN SPECIAL TORQUES ARE NOT GIVEN
INSTALLATION
INSTRUCTIONS