wsm Kubota U15 Instruction manual
WORKSHOP MANUAL
KUBOTA EXCAVATOR
U15
Code No.97899-61282
Service Chapter
U15-3
WSM U15, U15-3 Service
I-S-1
I. General
A.Body and engine identification marks . . . . . . . . . . . . . I-S-3
B.
Safety precautions for servicing, disassembly and reassembly
. . I-S-4
a. Safety measures before starting work. . . . . . . . . . . . . . . . . . . I-S-4
b. Safety measures during work . . . . . . . . . . . . . . . . . . . . . . . . . I-S-4
c. Preparation for disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-5
d. Precautions for disassembly and reassembly. . . . . . . . . . . . . I-S-5
C.
Important Safety process and critical functional process
. . I-S-6
a. Essential Adhesives . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-6
b. Important Safety Process .. . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-6
c. Important Critical Functional Process . . . . . . . . . . . . . . . . . . I-S-6
D.Important inspection items after reassembling . . . . . . I-S-6
a.
Operate the Machine and check for Unusual Noise and Vibrations
. . . . I-S-6
b.
Make Sure the Safety decals and Wireharness Clamps are in their
Specified Positions
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-6
c.
With the Machine Front in a Specified Posture, Check the Amount of
Hydrauric Oil
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-6
d. Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-7
E.Maintenance intervals . . . . . . . . . . . . . . . . . . . . . . . . I-S-12
a. EU version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-12
b. PP (KTC, KCL)-version. . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-15
b-1. KTA-version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-16-1
c. Hydraulic Oil Check for machines with Hydraulic Breakers . I-S-16-2
d. Maintenance items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-17
e. Troubleshooting for operators. . . . . . . . . . . . . . . . . . . . . . . . I-S-19
f. Periodic replacement of important component parts. . . . . . . I-S-20
g. Recommend oils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-21
h. Lifting capacity : U15-3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-22
F.Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-23
a. Machine Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-23
b. Main Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-23
c. Lever stroke and operating force . . . . . . . . . . . . . . . . . . . . . I-S-24
d. Dimensions of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-25
e. Quality specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I-S-34
Note : PP - version = Pan Pacific - version = KTC, KCL, KTA - version
WSM U15, U15-3 Service
I-S-3
A.Body and engine identification marks
(1) Machine serial number
(2) Engine serial number
e.g. D782 5L0023
“5” indicates year of 2005 and “L” indicates June.
So, 5L indicates that the engine was manufactured
in June 2005.
Model Serial No.
Excavator
Engine
Dealer's name
(To be filled in through the owner)
If trouble should occur during use, or if servicing is
necessary, contact the dealer who handles the
machine. At that time please inform the machine
model and engine type and serial numbers.
Name plate : Code No. RA018-57721
EU - version
U15-3
Machine model
Serial No.
Engine No.
PRODUCT IDENTIFICATION No.
>JKUU0153*00S40001<
40001
4
3
2
1
1
No.
Items
Contents ; Example
2
3
4
RA018-5772
PRODUCT
IDENTIFICATION
NUMBER
ENGINE No.
SERIAL No.
MODEL
2-47, Shikitsuhigasi 1-Chome, Naniwa-ku, Osaka, 556-8601 JAPAN
Example : S/N 40001
(1) Serial No.
(1) Engine serial No.
WSM U15, U15-3 Service
I-S-4
B.Safety precautions for servicing, disassembly and reassembly
Safety precautions for servicing
Most accidents during servicing arise from carelessness. Please remember that Safety involves both the
welfare of the employees and improved work efficiency.
Safety precautions for Disassembly and reassembly
Machines must be diassembled and assembled efficiently and safely.
It is very important to thoroughly understand the construction and function of the machine, to make all appro-
priate preparations, and start operations according to the specified working procedures.
a.
Safety measures before starting work
(1)Work clothes
1. Wear specified work cap and clothed.
(Under no circumstances may workers wear
undershirts only.)
Cuffs must be kept buttoned, and any tears
must be mended.)
2. Wear safety shoes.
3. Do not wear cotton gloves when working on
the internal section of engine, reduction
gears or hydrauricunits for repair or others,
or when using a hammer. Wear leather
gloves, however, when hoisting wires.
(2)Inspecting equipment and tools
1. Prepare equipment (cranes, fork lifts, tool,
etc.) required for servicing and inspect for
any problems before starting work.
2. Hammer heads (metal parts) must be firmly
secured to their handles.
3. Check hosting tools (wire ropes, hoisting
chains, etc.) before use.
(3)Keep workshop in order
1. Secure appropriate space needed for disas-
sembly to the job.
2. Secure a clean, safe place for arranging dis-
assembled parts.
3. Store volatile substances (gasoline, light oil,
thinner, oily articles, etc.) in appropriate con-
tainers at selected locations to prevent fire
hazards.
b. Safety measures during work
(1)Protectors
1. Wear goggles when using chisels for chip-
ping.
2. Use appropriate protectors during welding.
3. Wear a helmet when working with a crane or
at elevated locations.
(2)Team work
1. When working with two or more people,
divide the work and maintain close commu-
nication.
2. Clane work must be carried out using prede-
termined signals.
(3)Disassembly and assembly
1. Do not wear gloves when using hammers.
2. Use rods of the specified soft material for
removing pins. Do not use a hammer as a
pad.
3. Do not place fingers in holes when center-
ing.
4. Heavy parts must be adequately supported
before removingbolts.
(4)Cranes
1. In principle, use a crane for objects heavier
than 44lb (20kg).
2. Crane operation and hoisting must be per-
formed only by qualified personal.
3. Pay careful attention to the center of gravity
when hoisting, and do not stand under the
lifted objects.
(5)Others
1. To work under a jacked-up carrier, be sure to
place wood pieces under it.
2. When charging batteris, make sure there
are no open flames in the immediate vicinity.
3. All electric tools must be grounded.
4. Before welding the machine, remove the
battery.
• When removing the battery, be sure to dis-
connect negative (-) cord first.
• When mounting the battery, be sure tp
connect the positive (+) cord first.
WSM U15, U15-3 Service
I-S-5
c. Preparation for disassembly
(1)Cleaning
Remove mud and dirt from the body before disassembly.
(2)Acceptance inspection
The machine must be checked before it is disassembled to record existing conditions, such as those
listed below.
Model, serial number, and hourmeter reading
• Reason for repair and repair history
• Element stains
• Fuel and oil condition
• Parts damage *(Take photographs if necessary.)
(3)Equipment and tools
prepare equipment, tools, cranes and parts storage racks as required.
d. Precautions for disassembly and reassembly
(1)Disassembly
1. Follow the specified disassembly procedures.
2. Make alignment marks to insure correct reassembly.
3. Arrange disassembled parts in an orderly way, and attach identification tags or put marks if needed.
(2)Reassembly
1. Clean all parts before assembly. Repair any scratches or dents. Take special precautions against dirt
and dust.
2. Parts with rust-preventive coatings must be assembles only after removing the corting.
3. Separated parts must be correctly reassembled using alignment marks.
4. As a rule, use a press to reassembled bearings, bushing and oil seals. Use pads when using a ham-
mer.
e. Maintenance
CAUTION
When adding oil and servicing
1. Park the machine on a large, flat place.
2. Place the bucket and dozer on the ground.
3. Stop the engine
4. Move the attachment control lever and dozer lever to make sure the remaining pressure is relieved.
5. Draw out the starter key and check around the machine for safety.
Before starting the job, carefully read the Operational Manual in " ! Servicing Precautions" on the yellow
pages.
f. Waste Disposal
WARNING
Do not carelessly throw away and burn waste materials. Such actions may lead to environmental pollu-
tion and punishment by local laws.
When disposing of waste:
* Let out waste fluid from the machine into a container.
* Do not let waste fluid flow on the ground as well as into a river, lake, marsh, and sea.
* Contact your dealer or a qualified industrial waste handler to treat (dispose of or incinerate) harmful
waste materials. Those materials include waste oil, fuel, cooling water (anti-freeze), coolant, solvent,
filters, batteries, rubber and other toxic substances.
WSM U15, U15-3 Service
I-S-6
C.Important Safety process and critical functional process
The following instructions are related to essential adhesives, important safety process and critical func-
tional process .Pay special attention in servicing these process. (Pay also close attention in reconnecting
the electrical cables.)
a. Essential Adhesives
Type of screw adhesive
• Unless otherwise specified, use Three-Bond 1324 adhesive (medium-duty type).
Keep the screw threads free of oil and water.
Type of instantaneous adhesive
• Use Three-Bond 1733 or Three-Bond 1741E adhesive.
Keep the bond areas free of oil and water.
b. Important Safety Process .
1. Reconnecting the fuel hose (clearance, hose routes, clamps, etc.)
2. Electrical cabling (engine, instrument panal, controls, etc.) (wiring routes, clamps and couplers)
c. Important Critical Functional Process .
1. Setting up the travel wheel motor (tightening torque)
2. Reassembling the rotary joints (joint direction and shaft set-up)
3. Installing the swivel base bearing and the swivel motor (tightening torque)
4. Fitting the pump couplings (tightening torque)
D.Important inspection items after reassembling
a. Operate the Machine and check for Unusual Noise and Vibrations.
b. Make Sure the Safety decals and Wireharness Clamps are in their
Specified Positions.
c. With the Machine Front in a Specified Posture, Check the Amount of
Hydrauric Oil
Checking the oil level (For further datails, refer to the Operator’s Manual of each model.)
1) Park the machine on a level ground.
2) Make sure the hydrauric oil temperature is in the range of 10-30°C (50-86°F) and see if the oil level is
within the specified zone of the oil level gauge.
3) Extend the track cyrinder to Max. position.
4) Keep the machine front as shown as following posture.
Posture: Extend the rods of the arm and bucket cylinders to max. Place the bucket link on the ground, the
offset swing at the center, and the dozer also on the ground.
S
A
S
A
Leftward
swinging
Some space needed
Specified
machine posture
Red circle
Oil gauge (level)
WSM U15, U15-3 Service
I-S-7
d. Piping
(1)General precautions
• Tightening the pipe socket to the specified torque. If too tight, the socket itself or a hydraulic component
may get damaged. It too loose, an oil leak may result.
• In connecting a new hose or pipe, tighten its nut first to the specified torque and then turn it back (about
45°). Then tighten it again to the specified torque. (Do not this to the sealing tape-applied hose or pipe.)
• When disconnecting a vertical hose or pipe, separate its bottom connection first.
• In desconnecting and reconnecting the hose and pipe, be sure to use two wrenches. With one wrench,
restrain the mating part to allow no twist.
• Check the mating connector’s sleeve and the hose’s taper for dust deposits and scratches.
• When the pipe socket has been tightened up, wipe the joint clean. Apply the maximum operating pres-
sure 2 or 3 times to make sure there is no oil leak.
(2)Hydraulic hose
Check the hydraulic hose for too tight a connect or twist.
* Excessivly tight contact
Let’s suppose that a hose is in contact with another hose or other part. If the hose is pulled away by a force
of 2 kg but still in contact, it means the contact is too tight.
(3)Precautions in tightening the bolts and nuts
• Use bolts of specified length.
• Do not over tighten the bolts: Its threads may get deformed or the fixed part may get damaged. Do not
undertighten the bolt either: It may get loose.
• In other words, tighten the bolt to the specified torqoe.
• Tighten the bolts and nuts diagonally for even tightness.
R (Tapered thread)
G (Straight thread)
Nut
Sleeve
Steel pipe Union nut Tapered thread
Joint body
WSM U15, U15-3 Service
I-S-8
(4)Hose screw
(5)Joint bodies
Thread size
(piping screw)
Tightening torque
N·m
kgf·m
ft·lbf Wrench size
(reference)
Union nut section Taper thread
section
1/8”
7.8 ~ 11.8 N·m
0.8 ~ 1.2 kgf·m
5.8 ~ 8.7 ft·lbf
14.71 ~ 19.61 N·m
1.5 ~ 20 kgf·m
10.85 ~ 14.47 ft·lbf
17 mm
0.67 in
1/4”
24.5 ~ 29.4
2.5 ~ 3.0
18.1 ~ 21.7
36.3 ~ 44.1
3.7 ~ 4.5
26.8 ~ 32.5
19 mm
0.75 in
3/8”
49.0 ~ 53.9
5.0 ~ 5.5
36.2 ~ 39.8
49.0 ~ 68.6
5.0 ~ 7.0
36.2 ~ 50.6
22 mm
0.87 in
1/2”
58.8 ~ 63.7
6.0 ~ 6.5
43.4 ~ 47.0
83.4 ~ 88.3
8.5 ~ 9.0
61.5 ~ 65.1
27 mm
1.06 in
3/4”
117.7 ~ 127.5
12.0 ~ 13.0
86.8 ~ 94.0
127.5 ~ 147.1
13.0 ~ 15.0
94.0 ~ 108.5
36 mm
1.42 in
1”
137.3 ~ 147.1
14.0 ~ 15.0
101.3 ~ 108.5
147.1 ~ 166.7
15.0 ~ 17.0
108.5 ~ 123.0
41 mm
1.61 in
Thread size
(piping screw)
Tightening torque
N·m
kgf·m
ft·lbf
Spanner size
(reference)
Remarks
Steel pipe (OD)
R (tapered thread) G (straight thread)
1/8”
19.6 ~ 29.4 N·m
2.0 ~ 3.0 kgf·m
14.5 ~ 21.7 ft·lbf
-17 mm
0.67 in
When in
steel pipe is
in use.
8 mm
0.31 in
1/4”
36.3 ~ 44.1
3.7 ~ 4.5
26.8 ~ 32.5
W/O-ring
Joint Torque
58.8 ~ 78.5
6 ~ 8
43.4 ~ 57.9
19 mm
0.75 in
12 mm
0.47 in
3/8”
39.2 ~ 49.0
4.0 ~ 5.0
28.9 ~ 36.2
W/O-ring
Joint Torque
78.5 ~ 98.1
8 ~ 10
57.9 ~ 72.3
23 mm
0.91 in
15 mm
0.59 in
1/2”
49.0 ~ 68.6
5.0 ~ 7.0
36.2 ~ 50.6
W/O-ring
Joint Torque
117.7 ~ 137.3
12 ~ 14
86.8 ~ 101.3
26 mm
1.02 in
16 mm
0.63 in
Metric Size Hose
Thread size
(piping screw)
Torque
N·m
kgf·m
ft·lbf
M12 ×1.5
20 ~ 30
2.0 ~ 3.1
14.75 ~ 22.13
M14 ×1.5
20 ~ 30
2.0 ~ 3.1
14.75 ~ 22.13
M16 ×1.5
30 ~ 50
3.1 ~ 5.1
22.13 ~ 36.9
M18 ×1.5
30 ~ 50
3.1 ~ 5.1
22.13 ~ 36.9
M22 ×1.5
40 ~ 60
4.1 ~ 6.1
29.5 ~ 44.25
WSM U15, U15-3 Service
I-S-9
(6)Tightening torque table for hose clamp (Screw type)
(7)Nuts for piping
No. Dia. (mm) Code No.
Tightening torque
N·m
kgf·m
ft·lbf
1 Ø12 ~ 16 09318-89016
2.5 ~ 3.4
25 ~ 35
1.84 ~ 2.51
2 Ø19 ~ 25 09318-89024
3 Ø31 ~ 40 09318-89039
4 Ø36 ~ 46 09318-89045
5 Ø15 ~ 25 RC101-64580 4.9 ~ 5.9
50 ~ 60
3.61 ~ 4.35
6 Ø26 ~ 38 68311-72820
7 Ø13 ~ 20 RB101-63630
3.4 ~ 4.4
35 ~ 45
2.58 ~ 3.31
8 Ø40 ~ 55 RC411-63180
4.9 ~ 5.9
50 ~ 60
3.61 ~ 4.35
9 Ø77 ~ 95 69284-63170
10 Ø50 ~ 60 RC401-63190
11 Ø32 ~ 44 RD411-63820
12 Ø32 ~ 51 68311-72830
Steel pipe size
(O.D. × I.D. ×
Thickness)
Tightening torque
N·m
kgf·m
ft·lbf
Spanner size
(reference) Remarks
8 × 6 × 1 mm
0.31 × 0.24 × 0.04 in
29.4 ~ 39.2
3.0 ~ 4.0
21.7 ~ 28.9
17 mm
0.67 in
When sleeve nut is
in use.
10 × 7 × 1.5 mm
0.39 × 0.28 × 0.06 in
39.2 ~ 44.1
4.0 ~ 4.5
28.9 ~ 32.5
19 mm
0.75 in
12 × 9 × 1.5 mm
0.47 × 0.35 × 0.06 in
53.9 ~ 63.7
5.5 ~ 6.5
39.7 ~ 47.0
21 mm
0.83 in
16 × 12 × 2 mm
0.63 × 0.47 × 0.08 in
88.3 ~ 98.1
9.0 ~ 10.0
65.1 ~ 72.3
29 mm
1.14 in
18 × 14 × 2 mm
0.71 × 0.55 × 0.08 in
127.5 ~ 137.3
13.0 ~ 14.0
94.0 ~ 101.3
32 mm
1.26 in
27.2 × 21.6 × 2.8 mm
1.07 × 0.85 × 0.11 in
235.4 ~ 254.97
24.0 ~ 16.0
173.6 ~ 188.1
41 mm
1.61 in
WSM U15, U15-3 Service
I-S-10
(8)Tightening torque of bolts and nuts
Refer to the tightness torque table below.
(9)Types and materials of bolts and nuts
[ex. bolts]
Bolts, Nuts
Nomial Dia.
4T 7T 9T
SS41 S40C, S45C SCr4
M6
7.8 ~ 9.3 N·m
0.80 ~ 0.95 kgf·m
5.8 ~ 6.9 ft·lbf
9.8 ~ 11.3 N·m
1.00 ~ 1.15 kgf·m
7.2 ~ 8.3 ft·lbf
12.3 ~ 14.2 N·m
1.25 ~ 1.45 kgf·m
9.0 ~ 10.5 ft·lbf
M8
17.7 ~ 20.6 N·m
1.80 ~ 2.10 kgf·m
13.0 ~ 15.2 ft·lbf
23.5 ~ 27.5 N·m
2.40 ~ 2.80 kgf·m
17.4 ~ 20.3 ft·lbf
29.4 ~ 34.3 N·m
3.00 ~ 3.50 kgf·m
21.7 ~ 25.3 ft·lbf
M10
39.2 ~ 45.1 N·m
4.00 ~ 4.60 kgf·m
28.9 ~ 33.3 ft·lbf
48.0 ~ 55.9 N·m
4.90 ~ 5.70 kgf·m
35.4 ~ 41.2 ft·lbf
60.8 ~ 70.6 N·m
6.20 ~ 7.20 kgf·m
44.8 ~ 52.1 ft·lbf
M12
62.8 ~ 72.6 N·m
6.40 ~ 7.40 kgf·m
46.3 ~ 53.5 ft·lbf
77.5 ~ 90.2 N·m
7.90 ~ 9.20 kgf·m
57.1 ~ 66.5 ft·lbf
103.0 ~ 117.7 N·m
10.50 ~ 12.00 kgf·m
75.9~ 86.8 ft·lbf
M14
107.9 ~ 125.5 N·m
11.00 ~ 12.80 kgf·m
79.6 ~ 92.6 ft·lbf
123.6 ~ 147.1 N·m
12.60 ~ 15.0 kgf·m
91.1 ~ 108.5 ft·lbf
166.7 ~ 196.1 N·m
17.00 ~ 20.00 kgf·m
123.0 ~ 144.7 ft·lbf
M16
166.7 ~ 191.2 N·m
17.00 ~ 19.50 kgf·m
123.0 ~ 141.0 ft·lbf
196.1 ~ 225.6 N·m
20.00 ~ 23.00 kgf·m
144.7 ~ 166.4 ft·lbf
259.9 ~ 304.0 N·m
26.50 ~ 31.00 kgf·m
191.7 ~ 224.2 ft·lbf
M18
245.2 ~ 284.4 N·m
25.00 ~ 29.0 kgf·m
180.8 ~ 209.7 ft·lbf
274.6 ~ 318.7 N·m
28.00 ~ 32.50 kgf·m
202.5 ~ 235.1 ft·lbf
343.2~ 402.1 N·m
35.00 ~ 41.00 kgf·m
253.2 ~ 296.5 ft·lbf
M20
333.4~ 392.2 N·m
34.00 ~ 40.00 kgf·m
245.9 ~ 389.3 ft·lbf
367.7 ~ 431.5 N·m
37.50 ~ 44.0 kgf·m
271.2 ~ 318.2 ft·lbf
519.8 ~ 568.8 N·m
53.00 ~ 58.00 kgf·m
383.3 ~ 419.5 ft·lbf
Types Material Tensile strength Hardness Bolt head marking
4T SS41
Over 392 MPa
4000 kgf/cm2
56892 lbf/in2
HRB
62 ~ 98 No mark or marked 4
7T S40C
S45C
Over 686 MPa
7000 kgf/cm2
99561 lbf/in2
HRC
20 ~ 28 Marked 7
9T SCr4
Over 882 MPa
9000 kgf/cm2
128007 lbf/in2
HRC
28 ~ 34 Marked 9
WSM U15, U15-3 Service
I-S-11
(10)Washer-equipped elbow
Tightening torque
Tightening procedure
1) Connecting with the valve
• Screw in the elbow by hand until the washer comes
into contact.
Note:Clean up hte mating seal boforehand.
2) Positioning
• Turn the elbow back to its set position.
Note:Do not make any more than one turn back.
3) Fixing
• Tighten up the lock nut with a wrench.
• Lock nut tightening torque
G1/4:25 ~ 30 N·m (2.5 ~ 3.0 kgf·m, 18 ~ 22 ft·lbs)
G3/8:50 ~ 55 N·m (5.0 ~ 5.5 kgf·m, 36 ~ 40 ft·lbs)
G1/2:60 ~ 65 N·m (6.0 ~ 6.5 kgf·m, 43 ~ 47 ft·lbs)
G3/4:118 ~ 127 N·m (12.0 ~ 13.0 kgf·m, 87 ~ 94 ft·lbs)
G1:118 ~ 127 N·m (12.0 ~ 13.0 kgf·m, 87 ~ 94 ft·lbs)
(11)Adhesives
1. Thread adhesive
* No oil and water allowed on the threads.
* No oil and water allowed on the threads.
2. Radiator hose sealant
Size N·m kgf·m ft·lbs
G1/4 25 ~ 30 2.5 ~ 3.0 18 ~ 22
G3/8 49 ~ 54 5.0 ~ 5.5 36 ~ 40
G1/2 59 ~ 64 6.0 ~ 6.5 43 ~ 47
G3/4
G1 118 ~ 127 12.0 ~ 13.0 87 ~ 94
Types of thread adhesive
Loctite 271 or equivalent (heavy-duty)
ThreeBond 1305P or equivalent (heavy-duty)
ThreeBond TB1401B or equivalent (light-duty)
ThreeBond 1324 (medium-duty) unless otherwise specified
Type of instant adhesive ThreeBond 1733 or 1741E
Sealant ThreeBond #1208E or equivalent
WSM U15, U15-3 Service
I-S-12
E.Maintenance intervals
a. EU version
[Operator servicing]
1.) Under dusty conditions the air filter must be cleaned more frequently or replaced.
Elapsed hours of operation
General maintenance 50 100 150 200 250 300 350 400 450 500 Interval
Checking the engine oil level daily
Check hydraulic oil level daily
Check fuel level daily
Check coolant level daily
Lubricate front-end
attachments daily
Checking the radiator and oil
cooler daily
Check electric cables and
connections daily
Check water separator daily
Check V-belt daily
Drain water from the fuel
reservoir 500 h
Lubricate the swivel gear 50 h
Battery service 50 h
Tracks and chassis: clean,
visually inspect and check
tension
weekly
(50 h)
Check nuts and bolts 100 h
Check, clean air filter 1.)
200 h
Grease the swivel bearing
200 h
WSM U15, U15-3 Service
I-S-13
[Operator servicing]
1.) Under dusty conditions the air filter must be cleaned more frequently or replaced.
Elapsed hours of operation
General maintenance 550 600 650 700 750 800 850 900 950 1000 Interval
Checking the engine oil level daily
Check hydraulic oil level daily
Check fuel level daily
Check coolant level daily
Lubricate front-end
attachments daily
Checking the radiator and oil
cooler daily
Check electric cables and
connections daily
Check water separator daily
Check V-belt daily
Drain water from the fuel
reservoir
500 h
Lubricate the swivel gear 50 h
Battery service 50 h
Tracks and chassis: clean,
visually inspect and check
tension
weekly
(50 h)
Check nuts and bolts 100 h
Check, clean air filter 1.)
200 h
Grease the swivel bearing
200 h
WSM U15, U15-3 Service
I-S-13-1
[Servicing by skilled personnel or KUBOTA dealer]
* The servicing identified with zmust be carried out after the specified hours of operation after initial
operation have been reached.
1.) Under dusty conditions the air filter must be cleaned more frequently or replaced.
2.) When using a hydraulic hammer over 20% →every 800 h.
When using a hydraulic hammer over 40% →every 400 h.
When using a hydraulic hammer over 60% →every 300 h.
When using a hydraulic hammer over 80% →every 200 h.
3.) When using a hydraulic hammer up to 50% →every 200 h.
When using a hydraulic hammer over 50% →every 100 h.
Replace the return filter approximately 250 hours after the initial operation.
4.) Earlier if necessary.
Elapsed hours of operation *
Servicing 50 100 150 200 250 300 350 400 450 500 Interval
Check/adjust V-belt tension
250 h
Check coolant hoses and
clamps
250 h
Grease pilot valve linkage
250 h
Change engine oil and oil
filter 500 h
Replace the fuel filter 4.) 500 h
Change return filter for the
hydraulic oil tank 3.) Please contact your KUBOTA dealer.
500 h
Replace the drive unit oil
500 h
Change hydraulic oil and
suction filter 2.) Please contact your KUBOTA dealer. 1000 h
Replace the in-line filter Please contact your KUBOTA dealer. 1000 h
Replace the air filter elements
).1 1000 h
Change running gear and
track roller oil Please contact your KUBOTA dealer. 2000 h
Check alternator and starter
motor Please contact your KUBOTA dealer. 2000 h
Check electric cables and
connections Please contact your KUBOTA dealer. Annually
Safety inspection
Annually
Replace the coolant and rinse
the cooling system every 2
years
Replace coolant hoses and
clamps Please contact your KUBOTA dealer.
250 h
Change hydraulic hoses Please contact your KUBOTA dealer. every 6
years
WSM U15, U15-3 Service
I-S-14
[Servicing by skilled personnel or KUBOTA dealer]
1.) Under dusty conditions the air filter must be cleaned more frequently or replaced.
2.) When using a hydraulic hammer over 20% →every 800 h.
When using a hydraulic hammer over 40% →every 400 h.
When using a hydraulic hammer over 60% →every 300 h.
When using a hydraulic hammer over 80% →every 200 h.
3.) When using a hydraulic hammer up to 50% →every 200 h.
When using a hydraulic hammer over 50% →every 100 h.
4.) Earlier if necessary.
Elapsed hours of operation
Servicing 550 600 650 700 750 800 850 900 950 1000 Interval
Check/adjust V-belt tension
250 h
Check coolant hoses and
clamps
250 h
Grease pilot valve linkage
250 h
Change engine oil and oil
filter
500 h
Replace the fuel filter 4.)
500 h
Change return filter for the
hydraulic oil tank 3.) Please contact your KUBOTA dealer.
500 h
Replace the drive unit oil
500 h
Change hydraulic oil and
suction filter 2.) Please contact your KUBOTA dealer. 1000 h
Replace the in-line filter Please contact your KUBOTA dealer. 1000 h
Replace the air filter elements
).1 1000 h
Change running gear and
track roller oil Please contact your KUBOTA dealer. 2000 h
Check alternator and starter
motor Please contact your KUBOTA dealer. 2000 h
Check electric cables and
connections Please contact your KUBOTA dealer. Annually
Safety inspection Annually
Replace the coolant and rinse
the cooling system every 2
years
Replace coolant hoses and
clamps Please contact your KUBOTA dealer.
250 h
Change hydraulic hoses Please contact your KUBOTA dealer. every 6
years
WSM U15, U15-3 Service
I-S-15
b. PP (KTC, KCL)-version
* 500 thru 1000 continued to the following table.
No. Check points Intervals Hour meter indicator Consequently
50 100 150 200 250 300 350 400 450
1 Coolant check Daily check
change every 2 years
2 Fuel check Daily check
3 Engine oil check Daily check
change every 500 hrs
4 Hydraulic oil check Daily check
change every 1000 hrs *1
5 Lubrication points - Daily check
6 Radiator and oil cooler check Daily check
7 Engine and electrical wiring check Daily check every year
8 Fuel tank, Fuel filter drain every 50 hrs
9 Battery condition check every 50 hrs
10 Greasing swing bearing teeth - every 50 hrs
11 Fan belt tension adjust every 200 hrs
12 Radiator hoses and clamps check every 200 hrs
replace every 2 years
13 Air filter element Outer element clean every 200 hrs *2
@
replace every 1000 hrs *2
Inner element replace every 1000 hrs *2
14 Greasing swing ball bearings - every 200 hrs
15 Fuel filter element replace every 400 hrs @
16 Engine oil filter replace every 500 hrs
17 Drive unit oil change every 500 hrs
18 Hydraulic return filter element replace every 500 hrs
19 Hydraulic suction filter element replace every 1000 hrs
20 Fuel injection nozzle injection
pressure check every 1500 hrs *4 @
21 Front idler and track roller oil change every 2000 hrs
22 Alternator and starter motor check every 2000 hrs
23 Injection pump check every 3000 hrs *4 @
24 Radiator system rinse every 2 years
25 Fuel line and Intake air line check every 200 hrs @
replace every 2 years *3
WSM U15, U15-3 Service
I-S-16
First operation
*1 When using a hydraulic breaker, change hydraulic oil and return filter according to the table on "Hydraulic Oil Change
(Including Exchange of the Suction Filter in the Hydraulic Tank) under "EVERY 1000 SERVICE HOURS" in the chapter
"REGULAR CHECKS AND MAINTENANCE WORK".
*2 Clean and replace the air filter more frequently if used under dusty conditions. By heavy soiling, replace the filter.
*3 Replace only if necessary.
*4 Consult your local KUBOTA Dealer for this service.
A The items listed above (@ marked) are registered as emission related critical parts by KUBOTA in the U.S. EPA non-
road emission regulation. As the engine owner, you are responsible for the performance of the required maintenance
on the engine according to the above instruction. Please see the Warranty Statement in detail.
No. Check points Intervals Hour meter indicator Consequently
500 550 600 650 700 750 800 1000
1 Coolant check Daily check
change every 2 years
2 Fuel check Daily check
3 Engine oil check Daily check
change every 500 hrs
4 Hydraulic oil check Daily check
change every 1000 hrs *1
5 Lubrication points - Daily check
6 Radiator and oil cooler check Daily check
7 Engine and electrical wiring check Daily check every year
8 Fuel tank, Fuel filter drain every 50 hrs
9 Battery condition check every 50 hrs
10 Greasing swing bearing teeth - every 50 hrs
11 Fan belt tension adjust every 200 hrs
12 Radiator hoses and clamps check every 200 hrs
replace every 2 years
13 Air filter element Outer element clean every 200 hrs *2
@
replace every 1000 hrs *2
Inner element replace every 1000 hrs *2
14 Greasing swing ball bearings - every 200 hrs
15 Fuel filter element replace every 400 hrs @
16 Engine oil filter replace every 500 hrs
17 Drive unit oil change every 500 hrs
18 Hydraulic return filter element replace every 500 hrs
19 Hydraulic suction filter element replace every 1000 hrs
20 Fuel injection nozzle injection
pressure check every 1500 hrs *4 @
21 Front idler and track roller oil change every 2000 hrs
22 Alternator and starter motor check every 2000 hrs
23 Injection pump check every 3000 hrs *4 @
24 Radiator system rinse every 2 years
25 Fuel line and Intake air line check every 200 hrs @
replace every 2 years *3
This manual suits for next models
1
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