Caterpillar cat 931 b track loader (prefix 26y) service repair manual (26y00001 and up)

Service Repair Manual
Models
931B TRACK LOADER

Shutdown SIS
Previous Screen
Product: TRACK LOADER
Model: 931B TRACK LOADER 26Y
Configuration: 931B LGP TRACK LOADER / POWER SHIFT / 26Y00001-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
SENR79180018
Steering Clutches
SMCS - 4101-015; 4101-016; 4101-011; 4101-012; 4109-010; 4109-012; 4109
Remove Steering Clutches (Dry-Type)
Start By:
a. remove hydraulic tank*
b. remove fuel tank*
*These operations are in the Disassembly And Assembly Manual, D3B And 931B Vehicle
Systems, Form No. SENR7928.
1. Remove the battery and battery frame.
2. Remove spring (2) and brake linkage (1).
1/38931B LGP TRACK LOADER / POWER SHIFT / 26Y00001-UP (MACHINE) POWE...
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3. Remove bolt (1) that holds the bracket for oil lines (4) and (5) in place. Remove oil lines (4) and
(5) and bracket.
4. Disconnect steering clutch linkage (6) from the pedal assembly.
5. Disconnect oil line (8) from the fitting for the steering clutch control valve.
6. Remove bolts (9) that hold the valve in place and push steering clutch control valve (7) clear of
the cover for the steering clutch compartment.
NOTE: Do Steps 7 and 8 for the left steering clutch only.
7. Disconnect the clip that holds wire harness (11) in place. Disconnect wire harness (11) from the
back-up warning alarm.

8. Remove bolts (12) and (14) that hold battery cables (10) and (13) in place. Push the battery
cable out of the way.
9. Remove bolts (15) that hold brake housing (16) in place.
10. Lift brake housing (16) up and remove pin lock (17). Remove the pin and remove brake
housing (16).
11. Remove bolt (19), and remove lever (18) from the shaft. Remove the key from the shaft.
12. Loosen nut (22) and slide shaft (20) from the brake housing. Remove the key from the shaft.
Remove lever (21) from the brake housing. Remove the nut and bolt from the lever.

13. Remove the lip-type seal from the housing. Remove bearings (23) and the plug from the brake
housing with tool (A) and a press.
14. Remove cover (24) from the steering clutch case.
Typical Example
15. Remove the cotter pin and pin (25) that hold brake linkage (26) in place. Remove brake
linkage (26).
16. Disconnect oil line (27) from the clutch cylinder assembly.

17. Remove rod (28) from the yoke and the piston.
18. Remove four bolts (30) that hold clutch cylinder assembly (29) in the steering clutch
compartment.
19. Remove clutch cylinder assembly (29) from the steering clutch compartment.
20. Disassemble clutch cylinder assembly (29) as follows:
a. Remove piston (31), spring (32), O-ring seal (33) and ring (34) from cylinder (35).
b. Remove plug (37) and O-ring seal (36) from cylinder (35).
21. Remove spring (38).

22. Remove nuts (40), washers (42) and springs (43) from bolts (41). Remove bolts (41) and
plates (39).
23. Remove nut assembly (44).
24. Remove the four bolts that hold brake band support (45) in position on the bottom of the
steering clutch compartment and remove the support.
25. Remove plug (46) on the side of the steering clutch compartment to get access to the bolts that
hold final drive pinion flange to the steering clutch.

26. Push the tractor forward or backward to turn the steering clutch. Remove bolts (47) and (48)
except for one on each side of the steering clutch.
27. Fasten a hoist to steering clutch (49). Remove the last two bolts and remove steering clutch
(49) from the steering clutch compartment. The weight of the steering clutch is 74 kg (165 lb).
Install Steering Clutches (Dry-Type)
1. Put 5P0960 Multipurpose Grease on the ball and insert at each end of the yoke on the steering
clutch. Fasten a hoist and position steering clutch (49) in the steering clutch compartment.
2. Put 9S3263 Thread lock on the threads and install the bolts that hold the steering clutch shaft to
the hub coupling. Tighten the bolts to a torque of 122 ± 7 N·m (90 ± 5 lb ft)
3. Put 9S3263 Thread lock on the threads and install the bolts that hold the steering clutch to the
final drive pinion flange. Tighten the bolts to a torque of 120 to 135 N·m (90 to 100 lb ft)

4. Put 5P3413 Thread Sealant on the threads of plug (46), and install the plug.
5. Put support (45) in position on the brake band and turn the brake band and support to the
bottom of the steering clutch compartment. Install the four bolts that hold the support in place.
6. Install nut assembly (44). Tighten nut assembly (44) until there is no clearance between the
band and drum.
7. Loosen the locknut for the support screw (bottom bevel gear case).
8. Tighten the brake support screw (bottom of bevel gear case) until the screw makes contact with
the band. loosen the screw one turn. Tighten the locknut.
9. Put plates (39) in position and install bolts (41). Install springs (43), washers (42) and nuts (40)
on bolts (44). Tighten nuts (40) until the length of springs (43) is 19 mm (.75 in).

10. Install spring (38). Install spring (38) in the correct hole in the bracket so that the length of the
spring is 168 mm (6.6 in).
11. Assemble clutch cylinder assembly (29) as follows:
a. Install ring (34) inside of O-ring seal (33). Install O-ring seal (33) and ring (34) in the groove
inside cylinder (35). Install spring (32) and piston (31) in cylinder (35).
b. Install O-ring seal (36) on plug (37), and install the plug in cylinder (35).
12. Put 138-8436 gasket Material on the base of clutch cylinder assembly (29). Put clutch cylinder
assembly (29) in position in the steering clutch compartment.
13. Put 5P3413 pipe Sealant on the threads of bolts (30) that hold the clutch cylinder assembly in
place, and install the bolts.

14. Install rod (28) in the piston.
15. If necessary, make an adjustment to bolt (50) until the distance between the bolt and the
steering clutch housing is 8 mm (.315 in).
16. Connect oil line (27) to the clutch cylinder assembly.
Typical Example
17. If necessary, make an adjustment to brake linkage (26) so distance (X), between the center of
the pins, is 332.7 ± 1.5 mm (13.1 ±.059 in).
18. Put brake linkage (26) in place and install pin (25) and pin lock that holds the brake linkage in
place.
10/38931B LGP TRACK LOADER / POWER SHIFT / 26Y00001-UP (MACHINE) PO...

19. Put 3S6252 Sealant on the contact surfaces of cover (24) and the steering clutch case. Put
cover (24) in position. Put 5P3414 Thread Sealant on the threads of the bolts that hold cover to the
steering clutch case. Install the bolts.
20. Use tooling (A) and a press and install bearings (23) in brake housing (16). Install the bearings
even with the inside surface of the brake housing. Install the seal with the lip of the seal to the
inside.
21. Install plug (51) for the smaller bearing with tooling (A).
22. Put 5P960 Multipurpose Grease on the shaft (20). Install key (52) in the shaft. Put lever (21) in
position in the brake housing and slide shaft (20) in position. Install the bolt and nut that hold
lever (21) to the shaft.

23. Install key (53) in shaft (20). Slide lever (18) on to the shaft and install the bolt and nut that
hold lever (18) to the shaft.
24. Put the brake housing in position as shown. Connect brake linkage (26) and lever (21) with pin
(54). Install the lockpin to hold pin (54) in place.
25. Put 3S6252 Sealant between brake housing (16) and the cover. Put 3S3263 Thread Lock on
the threads of bolts (15) that hold the brake housing in place. Install the bolts.
26. Put battery cable (10) in its original position. Put 5P3413 Thread Sealant on the threads of
bolts (12). Install the clips and bolts (12) that hold battery cable (10) in place.
27. Put battery cable (13) in its original position. Put 9S3263 Thread Lock on the threads of bolt
(14). Install the clip and bolt (12) that hold battery cable (13) in place.
28. Connect wire harness (11) to the back-up warning alarm. Install the clip for the wire harness.

29. Put steering clutch control valve (7) in place on the cover. Put 5P3413 Thread Sealant on the
threads of bolts (9) that hold the valve in place. Install bolts (9).
30. Connect oil line (8).
31. Put oil lines (5), (4) and the bracket in place. Put 5P3413 Thread Sealant on the threads of bolt
(3) that holds the bracket in place.
32. Connect steering clutch linkage (6) to the pedal assembly.
33. Install brake linkage (1) and spring (2).
34. Install the battery frame and battery.

35. Check the steering clutches and brakes for correct adjustments. See the topics, Steering Clutch
Adjustment and Brake Adjustment in Specifications. For D3B, see Form No. SENR7915. For
931B, see Form No. SENR7929.
End By:
a. install fuel tank*
b. install hydraulic tank*
Remove Steering Clutches (Oil Cooled)
Start By:
a. remove hydraulic tank*
b. remove fuel tank*
1. Drain the oil from the steering clutch compartment.
2. Remove the battery and battery frame.
3. Remove spring (2) and brake linkage (1).

4. Remove bolt (3) that holds the bracket for oil lines (4) and (5) in place. Remove oil lines (4) and
(5) and bracket.
5. Disconnect steering clutch linkage (6) from the pedal assembly.
6. Disconnect oil line (8) from the fitting for the steering clutch control valve.
7. Remove bolts (9) that hold the valve in place and push steering clutch control valve (7) clear of
the cover for the steering clutch compartment.
8. Disconnect the clip that holds wire harness (11) in place. Disconnect wire harness (11) from the
back-up warning alarm.
9. Remove bolts (12) and (14) that hold battery cables (10) and (13) in place. Push the battery
cable out of the way.

10. Remove bolts (15) that hold brake housing (16) in place.
11. Lift brake housing (16) up and remove pin lock (17). Remove the pin and remove brake
housing (16).
12. Remove bolt (19), and remove lever (18) from the shaft. Remove the key from the shaft.
13. Loosen nut (22) and slide shaft (20) from the brake housing. Remove the key from the shaft.
Remove lever (21) from the brake housing. Remove the nut and bolt from the lever.

14. Remove the lip-type seal from the housing. Remove bearings (23) and the plug from the brake
housing with tool (A) and a press.
15. Remove retaining ring (28) from bar (27).
16. Remove four bolts (26), and remove cover (25) and the gasket from cover (24).
17. If necessary, remove bearing (29) from cover (25).
18. Remove bar (27) from sleeve (31). If necessary, remove the dowel from bar (27).
19. Remove O-ring seal (30) from bar (27).
20. Remove cover (24) from the steering clutch case.
21. Remove bolt and nut (32), and remove sleeve (31).

Typical Example
22. Remove the cotter pin and pin (33) that hold brake linkage (34) in place. Remove brake
linkage (34).
Typical Example
23. Disconnect oil line (35) from the clutch cylinder and fitting.
Typical Example
24. Remove rod (36) from the yoke and the piston.
Typical Example

25. Remove four bolts (38) that hold cylinder (37) in the steering clutch compartment.
26. Remove cylinder (37) from the steering clutch compartment.
27. Remove piston (42), spring (41), O-ring seal (40) and ring (39) from cylinder (37).
28. Remove plug (43) and O-ring seal (44) from cylinder (37).
Typical Example
29. Remove bar (45).
30. Remove the four bolts that hold brake band support (46) in position on the bottom of the
steering clutch compartment, and remove the support.

31. Remove plug (47) on the side of the steering clutch compartment to get across to the bolts that
hold the final drive pinion flange to the steering clutch.
32. Push the tractor forward or backward to turn the steering clutch. Remove bolts (48) and (49)
except for one on each side of the steering clutch.
33. Fasten a hoist to steering clutch (50). Remove the last two bolts and remove steering clutch
(50) from the steering clutch compartment. The weight of the steering clutch is 74 kg (165 lb).
Install Steering Clutches (Oil Cooled)
1. Put 5P0960 Multipurpose Grease on the ball and insert at each end of the yoke on the steering
clutch. Fasten a hoist and position steering clutch (50) in the steering clutch compartment.
2. Put 9S3263 Thread lock on the threads and install the bolts that hold the steering clutch shaft to
the hub coupling. Tighten the bolts to a torque of 122 ± 7 N·m (90 ± 5 lb ft)

3. Put 9S3263 Thread lock on the threads and install the bolts that hold the steering clutch to the
final drive pinion flange. Tighten the bolts to a torque of 120 to 135 N·m (90 to 100 lb ft)
4. Put 5P3413 Thread Sealant on the threads of plug (47), and install the plug.
5. Put support (46) in position on the brake band and turn the brake band and support to the
bottom of the steering clutch compartment. Install the four bolts that hold the support in place.
Typical Example
6. Install bar (45).
7. Install ring (39) inside of O-ring seal (40). Install O-ring seal (40) and ring (39) in the groove
inside cylinder (37). Install spring (41) and piston (42) in the cylinder.

8. Install O-ring seal (44) on plug (43), and install the plug in cylinder (37).
Typical Example
9. Put 138-8436 Liquid Gasket Material on the base of clutch cylinder (37). Put cylinder (37) in
position in the steering clutch compartment.
10. Put 5P3413 Pipe Sealant on the threads of bolts (38), that hold the clutch cylinder in place, and
install the bolts.
Typical Example
11. Install rod (36) in the piston.
Typical Example
12. If necessary, make an adjustment to bolt (51) until the distance between the bolt and the
steering clutch housing is 8 mm (.315 in).

Typical Example
13. Connect oil line (35) to the clutch cylinder and fitting.
Typical Example
14. If necessary, make an adjustment to brake linkage (34) so distance (X), between the center of
the pins, is 332.7 ± 1.5 mm (13.1 ± .059 in).
15. Put brake linkage (34) in place and install pin (33) and pin lock that holds the brake linkage in
place.

16. Install sleeve (31) on the bar, and install bolt and nut (32).
17. Put 3S6252 Sealant on the contact surfaces of cover (24) and the steering clutch case. Put
cover (24) in position. Put 5P3414 Thread Sealant on the threads of the bolts that hold cover to the
steering clutch case. Install the bolts.
18. Install O-ring seal (30) from bar (27).
19. Install the dowel in bar (27). Position the dowel in the bar (27) in slot in sleeve (31).
20. Install bearing (29) in cover (25).
21. Install the gasket and cover (25) on cover (24). Put 9S3263 Thread lock on the threads of bolts
(26), and install the bolts.
22. Install retaining ring (28) on bar (27).

23. Use tooling (A) and a press and install bearings (23) in brake housing (16). Install the bearings
even with the inside surface of the brake housing. Install the seal with the lip of the seal to the
inside.
24. Install plug (52) for the smaller bearing with tooling (A).
25. Put 5P960 Multipurpose Grease on the shaft (20). Install key (53) in the shaft. Put lever (21) in
position in the brake housing and slide shaft (20) in position. Install the bolt and nut that hold
lever (21) to the shaft.
26. Install key (54) in shaft (20). Slide lever (18) on to the shaft and install the bolt and nut that
hold lever (18) to the shaft.
27. Put the brake housing in position as shown. Connect brake linkage (34) and lever (21) with pin
(55). Install the lockpin to hold pin (55) in place.

28. Put 3S6252 Sealant between brake housing (16) and the cover. Put 3S3263 Thread Lock on
the threads of bolts (15) that hold the brake housing in place. Install the bolts.
29. Put battery cable (10) in its original position. Put 5P3413 Thread Sealant on the threads of
bolts (12). Install the clips and bolts (12) that hold battery cable (10) in place.
30. Put battery cable (13) in its original position. Put 9S3263 Thread Lock on the threads of bolt
(14). Install the clip and bolt (12) that hold battery cable (13) in place.
31. Connect wire harness (11) to the back-up warning alarm. Install the clip for the wire harness.
32. Put steering clutch control valve (7) in place on the cover. Put 5P3413 Thread Sealant on the
threads of bolts (9) that hold the valve in place. Install bolts (9).
33. Connect oil line (8).

34. Put oil lines (5), (4) and the bracket in place. Put 5P3413 Thread Sealant on the threads of bolt
(3) that holds the bracket in place, and install the bolt.
35. Connect steering clutch linkage (6) to the pedal assembly.
36. Install brake linkage (1) and spring (2).
37. Install the battery frame and battery.
38. Fill steering clutch compartment with oil to the correct level. See the Operation And
Maintenance Manual.
39. Check the steering clutches and brakes for correct adjustments. See the topics, Steering Clutch
Adjustment and Brake Adjustment in Specifications. For D3B, see Form No. SENR7915. For
931B, see Form No. SENR7929.
End By:
a. install fuel tank*
b. install hydraulic tank*

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Disassemble Steering Clutches
Start By:
a. remove steering clutches

1. Remove brake band (2) and outer drum (1) from the steering clutch.
2. Install tooling (B) to the end of the clutch shaft and install it in a vise.
3. Remove lock (3). Use tooling (A) and loosen nut (4) until it is even with the top of the shaft.
Do not remove nut (4). This will keep the drum on the shaft when it is
loosened from the taper on the shaft.
4. Remove the steering clutch from the vise. The weight is approximately 45 kg (100 lb).
5. Use tooling (D) as shown to push the shaft from the inner drum. Remove tooling (D) and nut
(4). Remove the shaft from the steering clutch.

6. Install tooling (H) on the other side of the steering clutch and install it in a vise.
7. Remove two setscrews (5). Use tool (E) and remove spanner nut (6) from the plate assembly.
8. Bend locks (7) down and remove bolts (8) that hold the yoke in place.
9. Remove yoke (9) from the plate assembly.
10. Use a pry bar on each side of the bearing cage and remove bearing cage (10) from the plate
assembly.
11. Remove retaining ring (11) from bearing cage (10).

12. Remove bearing (12) from bearing cage (10).
13. Put two pieces of wood (13) on tool (F), as shown, as a support for the steering clutches.
Install drum (1). Make an alignment of the centers of the clutches and drum (1).
Use only enough force to put the steering clutch springs under
compression to remove the locks from the studs. Be extra careful that
the 5P3036 Installer Ring moves freely on the studs.
14.
Install tooling (C), as shown, and put the steering clutch spring under compression.
15. Remove locks (14) from the studs.

16. Slowly release the pressure on the steering clutch springs. Remove tooling (C).
NOTE: Only oil-cooled steering clutches have spacers located under springs (16).
17. Remove retainers (15), springs (16) and the spacers from the studs.
18. Install tooling (G) as shown. Fasten a hoist and remove inner drum (17).
19. Remove steering clutch discs (18).
20. Remove studs (19) from the plate assembly.
Assemble Steering Clutches

Caterpillar cat 931 b track loader (prefix 26y) service repair manual (26y00001 and up)

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