Caterpillar cat 931 b track loader (prefix 30y) service repair manual (30y00001 and up)

Service Repair Manual
Models
931B TRACK LOADER

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Product: TRACK LOADER
Model: 931B TRACK LOADER 30Y
Configuration: 931B LGP TRACK LOADER / POWER SHIFT / 30Y00001-UP (MACHINE) POWERED BY 3204 ENGINE
Disassembly and Assembly
D3B TRACTOR & 931B TRACTOR TYPE LOADER POWER TRAIN
Media Number -SENR7918-02 Publication Date -01/11/2004 Date Updated -15/02/2017
SENR79180010
Track Roller Frames
SMCS - 4151-010
Remove And Install Track Roller Frame
Start By:
a. remove front idlers
1. Remove recoil spring guard (1) from the track roller frame.
2. Remove yoke assembly (2) from the track roller frame.
1/2931B LGP TRACK LOADER / POWER SHIFT / 30Y00001-UP (MACHINE) POWE...
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3. Fasten two straps and a hoist to the track roller frame.
4. Remove bolts (3) and (4) that hold the track roller frame in place. Remove track roller frame
(5). The weight is 320 kg (700 lb).
NOTE: The following steps are for the installation of track roller frames.
5. Fasten two straps and a hoist to the track roller frame (5). Put the track roller frame in position
on the machine.
6. Install bolts (3) and (4) that hold the track roller frame in position. Tighten the bolts to a torque
of 360 ± 47 N·m (265 ± 35 lb ft).
7. Install yoke assembly (2).
8. Install recoil spring guard (1) on the track roller frame.
End By:
a. install front idlers
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Mon Sep 9 17:32:08 UTC+0800 2019

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SENR79180011
Pivot Shaft (D3B SA)
SMCS - 7117-011
Remove And Install Pivot Shaft (D3B SA)
Start By:
a. remove track roller frames
1. Remove bolts (1) and retainer (2) from support assembly (3). Remove the O-ring seal from the
retainer.
2. Remove the bolts and plate that hold support assembly (3) in position on shaft assembly (4).
3. Attach a hoist to support assembly (3), and remove it from shaft assembly (4). The weight of
the support assembly is 32 kg (71 lb).

4. Remove seal (6) from shaft assembly (4).
5. Attach a hoist to shaft assembly (4). The weight of the shaft assembly is 32 kg (71 lb).
6. If necessary, remove bearings (7) and (8) from the support assembly.
NOTE: The following steps are for installation of the pivot shaft.
7. If bearings (7) and (8) were removed, install the bearings in support assembly (4). The inside
diameter of bearing (7) must be 69.856 ± 0.134 mm (2.7502 ± .0053 in) after installation. The
inside diameter of bearing (8) must be 88.744 ± 0.084 mm (3.4939 ± .0033 in) after installation.
8. Put 5P3931 Anti-Seize Compound on the shaft assembly pilot. Attach a hoist to the shaft
assembly (4). Put shaft assembly (4) in position, and install bolts (5).
9. Install seal (6) on the shaft assembly.
10. Attach a hoist to support assembly (3). Put support assembly (3) in position on shaft assembly
(4), and install the plate and bolts that hold it in place.
11. Install the O-ring seal on retainer (2). Put clean oil on the O-ring seal. Put retainer (2) in
position on support assembly (3), and install bolts (1).
12. Fill the pivot shaft with oil to the correct level. See the Operation And Maintenance Manual.
Mon Sep 9 17:32:49 UTC+0800 2019

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SENR79180012
Equalizer Bar (D3B SA)
SMCS - 7206-010
Remove And Install Equalizer Bar (D3B SA)
1. Raise the machine with tooling (A), just enough to take the pressure off of the equalizer bar.

2. Remove the recoil mechanism guard group (1) from each side of the machine.
3. Remove bolts (4) that fasten pin assemblies (3) to support assemblies (2), and remove pin
assemblies (3).
4. Remove bolt (5) that holds pin assembly (6) in place.
5. Place a suitable floor jack under the equalize bar and remove pin assembly (6) and the equalizer
bar. The weight of the equalizer bar is 100 kg (220 lb).
NOTE: The following steps are for installation of the equalizer bar.
6. Put the equalizer bar in position on a suitable floor jack.
7. Install pin assembly (6) and bolt (5).

8. Align the pin hole in the equalizer bar with support assemblies (2). and install pin assemblies
(3) and bolts (4).
9. Install recoil mechanism guard group (1).
10. Remove tooling (A).
Mon Sep 9 17:33:30 UTC+0800 2019

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SENR79180013
Sprocket Segments
SMCS - 4164-010
Remove And Install Sprocket Segments
Start By:
a. separation of track

1. Remove five nuts (2) and bolts (3), and remove sprocket segment (1) from the hub.
NOTE: The following steps are for the installation of the sprocket segments.
2. Make sure the surfaces of the sprocket segment and the hub that make contact are clean and free
of paint.
3. Put clean SAE 30W oil on the threads of the bolts.
4. Put sprocket segment (1) in piston on the hub, and install five bolts (3) with the head of the
bolts against the sprocket segment. Install five nuts (2). Tighten the bolts to a torque of 70 ± 10
N·m (50 ± 7 lb ft). Tighten the bolts 1/3 turn more. The final torque must be a minimum of 135
N·m (100 lb ft).
End By:
a. connection of track
Mon Sep 9 17:34:11 UTC+0800 2019

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SENR79180014
Sprocket Hubs
SMCS - 4184-010; 4184-012
Remove Sprocket Hubs
Start By:
a. separation of tracks

Typical Example
1. Remove the oil from the final drive housing.
2. Remove bolts (1) and locknut (2).
Typical Example
3. Remove nut (3) from the sprocket shaft.
Typical Example
4. Install tooling (A) as shown. Make sure there is 6.35 mm (.250 in) clearance between 6F8343
Adapter (5) and sprocket hub (4). Fasten a hoist to tooling (A). Loosen sprocket hub (4) from the
sprocket shaft.

Typical Example
Do not remove 6F8343 Adapter (5) or the sprocket hub can fall when
the tooling is removed.
5. Remove tooling (A) except the 6F8343 Adapter (5). Fasten a hoist to the sprocket hub as show.
Remove 6F8343 Adapter (5) from the sprocket shaft. Remove sprocket hub (4). The weight is 52
kg (115 lb).
6. Remove gasket (6) from the sprocket hub.
Typical Example
7. Remove outer half of Duo-Cone seal (7) from the sprocket hub.

8. Remove inner half of Duo-Cone seal (8) from the retainer.
Install Sprocket Hubs
NOTE: The rubber seals and all surfaces that make contact with the seals must be clean and dry
with no damage to the surface. After installation of the seals, put oil on the contact surfaces of the
Duo-Cone seals.
NOTE: See the topic, Installation Of Conventional Duo-Cone Seals, before installing any of the
Duo-Cone seals.
1. Install the inner half of Duo-Cone seal in the retainer with tool (B).

Typical Example
2. Install the outer half of Duo-Cone seal in the sprocket hub with tool (B).
Typical Example
The splines in the sprocket hub and shaft must be clean and free from
burrs.
3. Fasten a hoist to the sprocket hub. Put sprocket hub (4) in position on the sprocket shaft.
Typical Example
4. Install tooling (C) and fasten a hoist. Use tooling (C) to install the sprocket hub on the sprocket
shaft with a force of 311 to 355 kN (35 to 40 ton).

5. Install tooling (D) to check the distance from the shoulder of the sprocket shaft to the face of the
sprocket hub. The distance must be 3.00 ± 0.8 mm (.118 ± .03 in).
6. Install gasket (6).
Typical Example
7. Install nut (3) that holds the sprocket hub on the sprocket shaft. Tighten the nut to a torque of
334 ± 33 N·m (243 ± 24 lb ft).
8. Put 138-8436 Liquid Gasket Material between locknut (2) and the sprocket hub face. Install
locknut (2). If the bolt holes do not make an alignment with the holes in the sprocket hub, turn nut
(3) clockwise only enough to install locknut (2).

9. Fill the final drive housing with oil to the correct level. See the Operation And Maintenance
Manual.
End By:
a. connection of tracks
Mon Sep 9 17:34:52 UTC+0800 2019

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SENR79180015
Sprocket Shaft, Gear And Cover
SMCS - 4055; 4058-011; 4058-012
Remove Sprocket Shaft, Gear And Cover, As A Unit

Start By:
a. remove sprocket hubs
1. Drain the oil from the final drive cover.
2. Engage the brakes and remove locknut (1) with tool (A).
3. Install tool (B) on the end of the sprocket shaft. Install tool (C) and fasten a hoist.
4. Remove nuts (2) and bolts (3) that hold the cover to the steering clutch case.
5. Install two 3/8" - 16 NC forcing screws (4). Tighten the forcing screws evenly and remove the
sprocket shaft, gear and cover as a unit. Use bar (5) inside of tool (B) to keep the unit in balance
when it is removed. The weight is 108 kg (240 lb).

6. Remove sprocket shaft (6) and gear from cover (7) with tooling (D) and a press.
7. Remove cover (7) from the press. The weight is 56 kg (125 lb). Remove sprocket shaft (6) and
gear from the press. The weight is 52 kg (115 lb).
8. Remove retainer (8) and bearing cone (9) from the cover.
9. Remove O-ring seal (10) from retainer (8).
10. If a replacement is needed, remove bearing cup (11), spacer (12) and bearing cup (13) from the
cover.
NOTE: Do not remove race and roller assembly (14) unless a replacement is needed. The bearing
can be damaged when removed.

11. Remove race and roller assembly (14) from the cover with tool (E).
12. Remove spacer (15) from the sprocket shaft (16).
13. Remove nuts and bolts (16) that hold the sprocket shaft and gear together. Remove gear (17).
14. Remove bearing cone (18) from the sprocket shaft with tooling (F).
15. If a replacement is needed, remove bearing race (19) from the sprocket shaft.
16. Remove bearing cage (20) from the steering clutch case.

NOTE: Do not remove race and roller assembly (21) unless a replacement is needed. The bearing
can be damaged when removed.
17. Remove race and roller assembly (21) from bearing cage (20).
Install Sprocket Shaft, Gear And Cover, As A Unit
1. Install race and roller assembly (21) in bearing cage (20) with tooling (G) and a press.

2. Install bearing cage (20) on the steering clutch case.
3. If bearing race (19) was removed, heat bearing race (19) to a maximum temperature of 135° C
(275°F). Install bearing race (19) on the sprocket shaft. If necessary, use tooling (H) to install
bearing race.
4. Install bearing cone (18) on sprocket shaft (6) with tooling (I). Use a force of 98 to 240 kN (11
to 27 ton).
5. Install gear (17) on sprocket shaft (6). Install the bolts and nuts that hold the gear and sprocket
together. Tighten the nuts to a torque of 80 ± 7 N·m (60 ± 5 lb ft). Turn the nuts an additional 120°
± 5°. Minimum torque must be 307 N·m (230 lb ft).

6. Lower the temperature of bearing cups (13) and (11). Install bearing cup (13) spacer (12) and
bearing cup (11) in the cover.
7. If the race and roller assembly wash removed, install the race and roller in the cover with
tooling (G) and a press.
8. Put sprocket shaft (6) and gear on wooden block. Put cover (7) in position on the sprocket shaft
and gear.
9. Install spacer (15) on the sprocket shaft.

10. Put bearing cone (9) in position on the sprocket shaft.
11. Use tooling (I) as shown and install bearing cone (9) on the sprocket shaft with a force of 178
to 240 kN (20 to 27 ton). Turn the cover to put the bearing cones on their seats in the bearing cups.
12. Inspect O-ring seal (10) for damage and make a replacement if needed. Install O-ring seal (10)
on retainer (8).
13. Put retainer (8) in position on the cover.

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14. Install bolts (22) and tooling (J). Install 5P6514 Adapter (23) [part of tooling (I)] on the end of
the sprocket shaft.
15. Fasten a hoist to tooling (J). Put 138-8436 Liquid Gasket Material on the cover and the
steering clutch case that makes contact with each other. Install bar (5) in the 5P6514 Adapter to
put the sprocket shaft, gear and cover in balance. Install the unit on the steering clutch case. Install
the nuts and bolts that hold the cover to the steering clutch case.
16. Put oil on threads and friction material of locknut (1). If oil is not used, the friction material
will be destroyed when it is put on the threads of the sprocket shaft.
17. Install locknut (1) and turn it on the sprocket shaft until the threads of the sprocket shaft begin
to show beyond the friction material of the locknut.
NOTE: The torque needed to turn the locknut is with clean threads, with oil and all friction
material engaged on sprocket shaft threads, but locknut not in contact with bearing.

18. Use tooling (K) and check the torque needed to turn locknut (1). If the same locknut is used
again, it must take at least 55 N·m (40 lb ft) to turn the locknut. If not, use a new locknut with oil
on the threads and friction material of locknut. A new locknut must take at least 80 N·m (60 lb ft)
to turn it.
19. Use tooling (L) and tighten locknut (1) to a torque of 810 ± 70 N·m (600 ± 50 lb ft).
20. Fill the final drive with oil after sprocket hub is installed. See the Operation And Maintenance
Manual.
End By:
a. install sprocket hubs
Mon Sep 9 17:35:33 UTC+0800 2019
10/10931B LGP TRACK LOADER / POWER SHIFT / 30Y00001-UP (MACHINE) PO...

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SENR79180016
Drive Shaft
SMCS - 3253-010
Remove And Install Drive Shaft
1. Remove the transmission guard with a floor jack. The weight of the transmission guard is 45 kg
(100 lb).
2. Remove bolts (1) from the transmission output flange and pinion shaft.
3. Remove drive shaft (2).

4. Remove bolts (3), and spider and bearing assemblies (4) from the drive shaft.
NOTE: The following steps are for installation of the drive shaft.
5. Put spider and bearing assemblies (4) in position on the drive shaft, and install bolts (3). Tighten
the bolts to a torque of 35 ± 3 N·m (26 ± 2 lb ft)
6. Put drive shaft (2) in position on the transmission output flange and pinion shaft, and install
bolts (1). Tighten the bolts to a torque of 35 ± 2 N·m (26 ± 1 lb ft)
7. Install the transmission guard.
Mon Sep 9 17:36:14 UTC+0800 2019

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SENR79180017
Steering Clutch Control Valves
SMCS - 4102-010; 4102-017
Remove And Install Steering Clutch Control Valves
1. Remove floor plate (1) from the machine.
2. Disconnect oil lines (3), (4) and (5) from the steering clutch control valve.
3. Disconnect linkage rod (2) from the steering clutch control valve.

4. Remove the three bolts that hold the steering clutch control valve (6) in place. Remove the
steering clutch control valve (6).
NOTE: The following steps are for installation of the steering clutch control valves.
5. Put steering clutch control valve (6) in position and install the three bolts that hold it in place.
6. Connect linkage rod (2) to the steering clutch control valve.
7. Connect oil lines (3), (4) and (5) to the steering clutch control valve.
8. Use feeler gauge (7) to check the clearance between cam (8) and roller (9). With the brake pedal
against the stop, the clearance must be 0.74 ± 0.74 mm (.029 ± 0.29 in). Make adjustment to
linkage rod (2) for correct clearance.
9. Install the floor plate on the machine.
Disassemble And Assemble Steering Clutch And Control
Valves
Start By:
a. remove steering clutch control valves

1. Put identification on fittings and covers for assembly purposes.
2. Remove fittings (1) and (2) from the valve.
3. Remove the bolt and shaft (3). Remove cam (4) and washers (5) from the cover.
4. Remove bearing (6) from the cam.
5. Remove the two bolts and cover (7) from the valve.

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