Front Ball Socket Replacement

TM 9-2320-363-34-1 · Chapter 5 — Front Axle Maintenance

This task covers:     a. Removal b. Cleaning c. Inspection d. Repair e. Installation

Applicable Configuration:                             Equipment Condition:

All except M915A2                                     Reference                Condition Description

Tools and Special Equipment:                          TM 9-2320-363-20         Front Air Brake Chamber
                                                                               Removed
Shop Equipment, SC 4910-95-CL-A31
Tool Kit, SC 5180-90-CL-N05                           TM 9-2320-363-20         Front Slack Adjuster and
Spring Scale, J8129                                                            S-Cam Removed
                                                      Page 5-52                Tie Rod Removed
Materials/Parts:
                                                      Page 5-7                 Front Axle Shaft
Seal                        P/N 1391490
                                                                               Removed
Washer, Lock (20)
                                                      General Safety Instructions:
Washer, Lock (8)
Washer, Lock (8)            P/N 318BX
                                                                       WARNING
Grease,                     Appendix B, Item 26              Adhesives, solvents, and
Automotive and                                               sealant compounds can burn
Artillery (GAA)                                              easily, can give off harmful
Adhesive-Sealant,           Appendix B, Item 3               vapors, and are harmful to skin
Silicone                                                     and clothing. To avoid injury or
                                                             death, keep away from open
Tag, Identification         Appendix B, Item 55              fire and use in well-ventilated
                                                             area. If adhesive, solvent, or
References:                                                  sealant compound gets on skin
TM 9-2320-363-20                                             or clothing, wash immediately
                                                             with soap and water.

TM page 5-16

Illustration from TM 9-2320-363-34-1 (PDF page 454)

1. REMOVE FOUR NUTS (1), FOUR LOCK WASHERS (2), FOUR DOWELS (3), AND STEERING ARM (4). DISCARD LOCK WASHERS.

2. IF DAMAGED, REMOVE GREASE FITTING (5).

3. RECORD NUMBER AND THICKNESS OF SHIMS (6). REMOVE SHIMS (6) FROM STUDS (7) ON LEFT BALL SOCKET (8).

NOTE Steps 4 and 5 are for both left and right sides.

4. REMOVE PIPE PLUG (9).

5. REMOVE FOUR SCREWS (10), FOUR LOCK WASHERS (11), BOTTOM COVER (12), AND SHIMS (13) FROM BALL SOCKET (8). RECORD NUMBER AND THICKNESS OF SHIMS (13). DISCARD LOCK WASHERS.

TM page 5-17

Illustration from TM 9-2320-363-34-1 (PDF page 455)

NOTE Steps 6 thru 8 are for right side only.

6. IF DAMAGED, REMOVE GREASE FITTING (14).

7. REMOVE FOUR SCREWS (15), FOUR LOCK WASHERS (16), AND TOP COVER (17). DISCARD LOCK WASHERS.

8. RECORD NUMBER AND THICKNESS OF SHIMS (18). REMOVE SHIMS (18).

NOTE Steps 9 thru 24 are for both left and right sides.

9. IF DAMAGED, REMOVE GREASE FITTING (19).

10. REMOVE FOUR SCREWS (20) AND FOUR LOCK WASHERS (21). DISCARD LOCK WASHERS.

11. REMOVE BRAKE CHAMBER MOUNTING BRACKET (22).

TM page 5-18

Illustration from TM 9-2320-363-34-1 (PDF page 456)

12. MEASURE AND RECORD LENGTH FROM TOP OF STOP BOLT (23) TO TOP OF NUT (24).

13. REMOVE NUT (24) AND STOP BOLT (23) FROM BALL SOCKET (8).

14. REMOVE SIX SCREWS (25) AND SIX LOCK WASHERS (26), DISCARD LOCK WASHERS.

15. REMOVE SEAL RETAINER HALVES (27) AND SEAL (28) FROM BALL SOCKET (8).

16. REMOVE TWO SCREWS (29) AND END PLATE (30).

TM page 5-19

Illustration from TM 9-2320-363-34-1 (PDF page 457)

17. REMOVE LOWER AXLE BALL TRUNNION (31) BY DRIVING LOWER AXLE BALL TRUNNION (31) UP INTO BALL AND BUSHING ASSEMBLY (32).

18. REMOVE TWO SCREWS (33) AND END PLATE (34) FROM UPPER AXLE BALL TRUNNION (35).

19. REMOVE UPPER AXLE BALL TRUNNION (35) BY DRIVING UPPER AXLE BALL TRUNNION (35) DOWN INTO BALL AND BUSHING ASSEMBLY (32).

TM page 5-20

Illustration from TM 9-2320-363-34-1 (PDF page 458)

CAUTION Use sledgehammer carefully. Hammering too hard can crack ball socket or damage trunnion bearings if they are not seated before hammering.

20. HAMMER AROUND TOP OF BALL SOCKET (8) UNTIL UPPER AND LOWER BEARING CUPS (36 AND 37) ARE 1/8 IN. (3.18 mm) ABOVE AND BELOW BALL SOCKET (8) SURFACE.

21. TIP BALL SOCKET (8) OUT AND UP FROM BOTTOM AND REMOVE FROM BALL AND BUSHING ASSEMBLY (32).

22. REMOVE AND DISCARD SEAL (28) FROM BALL AND BUSHING ASSEMBLY (32).

TM page 5-21

Illustration from TM 9-2320-363-34-1 (PDF page 459)

NOTE

Upper and lower bearings and bearing cups are matched sets. Tag prior to removal to aid in installation.

23. REMOVE BEARINGS (38 AND 39).

24. REMOVE UPPER AND LOWER BEARING CUPS (36 AND 37) FROM BALL SOCKET (8).

25. IF DAMAGED, REMOVE FOUR STUDS (40) FROM BALL SOCKET (8) ON LEFT SIDE ONLY.

26. REMOVE TWO SEALS (41) AND TWO BUSHINGS (42) ON RIGHT AND LEFT SIDES.

TM page 5-22

Illustration from TM 9-2320-363-34-1 (PDF page 460)

Use general cleaning methods to clean all parts (page 2-30).

1. INSPECT ALL PARTS FOR WEAR OR DAMAGE.

2. INSPECT BUSHINGS FOR OUT-OF-ROUND CONDITION. REPLACE BUSHINGS IF 0.005 IN. (1.270 mm) OR MORE OUTOF ROUND.

Use general repair methods to repair damaged parts (page 2-33).

NOTE Steps 1 thru 3 are for both left and right ball sockets. Left side is shown.

1. INSTALL NEW SEAL (1) OVER BALL AND BUSHING ASSEMBLY (2).

TM page 5-23

Illustration from TM 9-2320-363-34-1 (PDF page 461)

NOTE

Top bearing cup has small opening up and bottom bearing cup has small opening down.

2. INSTALL BEARING CUPS (3 AND 4) IN BALL SOCKET (5). TAP BEARING CUPS (3 AND 4) UNTIL BEARING CUPS ARE NOT MORE THAN 1/8 IN. (3.18 mm) ABOVE BALL SOCKET (5).

3. INSTALL TWO BUSHINGS (6) AND TWO SEALS (7) IN BALL SOCKET (5).

4. IF REMOVED, INSTALL FOUR STUDS (8) IN LEFT BALL SOCKET (5).

NOTE Steps 5 thru 18 are for both sides.

5. PACK LOWER BEARING (9) WITH GREASE AND INSTALL IN BEARING CUP (4).

6. PACK UPPER BEARING (10) WITH GREASE AND INSTALL IN BEARING CUP (3).

TM page 5-24

Illustration from TM 9-2320-363-34-1 (PDF page 462)

7. WITH BRAKE CHAMBER MOUNTING SURFACE (11) FACING TO REAR AND MOUNTING HOLES (12) FACING OUT, INSTALL BALL SOCKET (5) OVER BALL AND BUSHING ASSEMBLY (2).

8. ALINE BALL SOCKET (5) WITH TRUNNION HOLES IN BALL AND BUSHING ASSEMBLY (2) AND INSTALL AXLE BALL TRUNNIONS (13 AND 14).

9. DRIVE BEARING CUPS (3 AND 4) FLUSH WITH SURFACE OF BALL AND BUSHING ASSEMBLY (2).

TM page 5-25

Illustration from TM 9-2320-363-34-1 (PDF page 463)

10. APPLY LIGHT COAT OF GREASE TO THREADS OF TWO SCREWS (15).

11. INSTALL END PLATE (16) AND TWO SCREWS (15) ON LOWER AXLE BALL TRUNNION (14). TIGHTEN SCREWS TO 40 LB-FT (54 N.m).

NOTE Install same number and thickness of shims as removed.

12. INSTALL SHIMS (17), BOTTOM COVER (18), FOUR NEW LOCK WASHERS (19), AND FOUR SCREWS (20). TIGHTEN SCREWS TO 185 LB-FT (251 N.m).

13. INSTALL GREASE FlTTING (21) IN BOTTOM COVER (18).

14. APPLY GREASE TO LOWER BEARING AT GREASE FlTTlNG (21).

15. REMOVE GREASE FlTTING (21).

16. INSTALL PIPE PLUG (22).

17. APPLY GREASE TO BALL AND BUSHING ASSEMBLY (2) AT REAR OF BALL SOCKET (5).

TM page 5-26

Illustration from TM 9-2320-363-34-1 (PDF page 464)

18. INSTALL END PLATE (23) AND TWO SCREWS (24) ON UPPER AXLE BALL TRUNNION (13). TIGHTEN SCREWS TO 40 LB-FT (54 N.m).

NOTE Steps 19 thru 23 are for left side only. Install same number and thickness of shims as removed.

19. INSTALL SHIMS (25) ON FOUR STUDS (8).

NOTE Install steering arm with flange side down.

20. INSTALL STEERING ARM (26) ON FOUR STUDS (8).

21. INSTALL ONE DOWEL (27) ON EACH OF FOUR STUDS (8).

22. INSTALL FOUR NEW LOCK WASHERS (28) AND FOUR NUTS (29) ON STEERING ARM (26). TIGHTEN NUTS TO 35-40 LB-FT (47-54 N.m).

23. IF REMOVED, INSTALL NEW GREASE FITTING (30).

24. APPLY COAT OF GREASE TO UPPER BEARING AT GREASE FlTTING (30).

TM page 5-27

Illustration from TM 9-2320-363-34-1 (PDF page 465)

NOTE Steps 25 thru 27 are for right side only. Install same number and thickness of shims as removed.

25. INSTALL SHIMS (31), TOP COVER (32), FOUR NEW LOCK WASHERS (33), AND FOUR SCREWS (34). TIGHTEN SCREWS TO 185-190 LB-FT (251-258 N.m).

26. IF REMOVED, INSTALL NEW GREASE FlTTlNG (35).

27. APPLY GREASE TO UPPER AXLE BALL TRUNNION THRU GREASE FITTING (35).

28. HOOK SPRING SCALE (36) ON END OF BALL SOCKET (5).

29. PULL SPRING SCALE (36) AND CHECK THAT BALL SOCKET (5) WILL MOVE WITH PULL OF 35-45 LB (1 6-20 kg); GO TO STEP 32. IF LESS THAN 35 LB (16 kg) IS REQUIRED, GO TO STEP

30. IF MORE THAN 45 LB (20 kg) IS REQUIRED, GO TO STEP 31.

30. RECORD NUMBER AND THICKNESS OF SHIMS (31) AND REMOVE ONE SHIM, SAME THICKNESS, FROM TOP AND BOTTOM OF BALL SOCKET (5). REPEAT STEP 29.

31. RECORD NUMBER AND THICKNESS OF SHIMS (31) AND ADD ONE SHIM, SAME THICKNESS, TO TOP AND BOTTOM OF BALL SOCKET (5). REPEAT STEP 29.

32. INSTALL SEAL (1) IN BALL SOCKET (5).

TM page 5-28

Illustration from TM 9-2320-363-34-1 (PDF page 466)

WARNING Adhesives, solvents, and sealant compounds can burn easily, can give off harmful vapors, and are harmful to skin and clothing. To avoid injury or death, keep away from open fire and use in well-ventilated area. If adhesive, solvent, or sealant compound gets on skin or clothing, wash immediately with soap and water.

33. APPLY SILICONE ADHESIVE-SEALANTTO INNER SIDES OF SEAL RETAINER HALVES (37) AND SIX SCREWS (38).

34. APPLY SILICONE ADHESIVE-SEALANT BETWEEN SEAL RETAINER HALVES (37).

35. ALINE SEAL RETAINER HALVES (37) AND INSTALL SIX NEW LOCK WASHERS (39) AND SIX SCREWS (38). TIGHTEN SCREWS TO 25 LB-FT (34N.m).

36. INSTALL STEERING STOP BOLT (40) AND NUT (41) TO SAME MEASUREMENT AS RECORDED DURING REMOVAL.

TM page 5-29

37. INSTALL BRAKE CHAMBER MOUNTING BRACKET (42) ON BALL SOCKET (5).

38. INSTALL FOUR NEW LOCK WASHERS (43) AND FOUR SCREWS (44).

39. IF REMOVED, INSTALL NEW GREASE FITTING (45).

NOTE Follow-on Maintenance:

Install front axle shaft (page 5-7). Install front slack adjuster and S-cam (TM 9-2320-363-20). Install front air brake chamber (TM 9-2320-363-20). Install tie rod (page 5-52).

TM page 5-30 Change 1