Equalizing Beam Replacement

TM 9-2320-363-34-1 · Chapter 9 — Suspension Maintenance

This task covers: a. Removal b. Cleaning c. lnspection d. Installation

Applicable Configuration:                           General Safety Instructions:

M915A2
                                                                     WARNING
Tools and Special Equipment:
                                                           Make sure all air lines and
Shop Equipment, SC 4910-95-CL-A31                          fittings are clear of debris.
Tool Kit, SC 5180-90-CL-N05                                Failure to do so could result in
                                                           equipment failure and/or injury
Materials/Parts:                                           to personnel.
Adapter (8)                 P/N 45163

References:
TM 9-2320-363-20

Equipment Condition:

Reference                   Condition Description
TM 9-2320-363-20            Air System Drained
TM 9-2320-363-20            Rear Brakeshoe and
                            Linings Removed

TM page 9-23

Illustration from TM 9-2320-363-34-1 (PDF page 635)

1. USING SUITABLE LIFTING DEVICE AND JACK STANDS, LIFT AND SUPPORT REAR OF VEHICLE SO THAT WEIGHT IS RELIEVED FROM BOTH REAR SPRINGS (1).

2. POSITION JACK STAND TO SUPPORT INPUT YOKE (2) OF FORWARD-REAR AXLE (3). POSITION JACK STAND TO SUPPORT INPUT YOKE (4) OF REAR AXLE (5).

TM page 9-24

Illustration from TM 9-2320-363-34-1 (PDF page 636)

NOTE Steps 3 thru 5 are for rear axle.

3. REMOVE FOUR AIR HOSES (6) FROM REAR BRAKE CHAMBERS (7).

NOTE Spider assembly consists of air brake chamber, S-cam, and slack adjuster.

4. REMOVE 16 NUTS (8), 16 WASHERS (9), 16 SCREWS (10), 16 WASHERS (11), AND 2 SPIDER ASSEMBLIES (12) FROM BOTH SIDES OF REAR AXLE (5).

5. USING SUITABLE FLOOR JACK, SUPPORT REAR AXLE (5).

6. REPEAT STEPS 3 THRU 5 FOR FORWARD-REAR AXLE (3).

TM page 9-25

Illustration from TM 9-2320-363-34-1 (PDF page 637)

7. REMOVE EIGHT NUTS (13), EIGHT WASHERS (14), AND FOUR SADDLE CAPS (15) FROM TWO SPRING ASSEMBLIES (1).

8. USING BLOCK OF WOOD AND JACK STAND, SUPPORT REAR ENDS OF TWO EQUALIZING BEAMS (16). REMOVE TWO NUTS (17), TWO WASHERS (18), TWO SCREWS (19), TWO WASHERS (20), AND FOUR ADAPTERS (21) FROM REAR END OF TWO EQUALIZING BEAMS (16). DISCARD ADAPTERS.

9. LOWER REAR ENDS OF TWO EQUALIZING BEAMS (16) ONTO BLOCKS.

10. REPEAT STEPS 8 AND 9 FOR FRONT END OF TWO EQUALIZING BEAMS (16).

11. REMOVE FOUR INTERMEDIATE TUBES (22) FROM TWO EQUALIZING BEAMS (16).

12. REMOVE ONE EQUALIZING BEAM (16) FROM BLOCKS AND REMOVE CROSSTUBE (23) FROM OTHER EQUALIZING BEAM (16).

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

TM page 9-26

Illustration from TM 9-2320-363-34-1 (PDF page 638)

Inspect all parts for wear or damage.

WARNING Make sure all air lines and fittings are clear of debris. Failure to do so could result in equipment failure and/or injury to personnel.

1. INSTALL FOUR INTERMEDIATE TUBES (1) IN TWO EQUALIZING BEAMS (2).

2. POSITION ONE EQUALIZING BEAM (2) . ON BLOCKS UNDER VEHICLE AND INSTALL CROSSTUBE (3).

3. INSTALL SECOND EQUALIZING BEAM (2) ON CROSSTUBE (3) AND BLOCKS UNDER VEHICLE.

NOTE

Rotate adapters so flat side is vertical. Do not tighten adapters until both ends are installed.

4. USING BLOCK OF WOOD AND JACK STAND, RAISE REAR ENDS OF TWO EQUALIZING BEAMS (2). INSTALL FOUR NEW ADAPTERS (4), TWO WASHERS (5), TWO SCREWS (6), TWO WASHERS (7), AND TWO NUTS (8) HAND-TIGHT.

TM page 9-27

5. REPEAT STEP 4 FOR FRONT END OF TWO EQUALIZING BEAMS (2) IN FORWARD-REAR AXLE (9).

6. TIGHTEN FOUR NUTS (8) TO 210-240 LB-FT (285-325 N.m).

7. INSTALL FOUR SADDLE CAPS (10), EIGHT WASHERS (11), AND EIGHT NUTS (12) ON TWO SPRING ASSEMBLIES (13). TIGHTEN NUTS TO 225-275 LB-FT (305-373 N.m).

NOTE Steps 8 and 9 are for forward-rear axle.

8. REPOSITION FLOOR JACK FROM STEP 5 OF REMOVAL AND INSTALL 2 SPIDER ASSEMBLIES (14), 16 WASHERS (15), 16 SCREWS (16), 16 WASHERS (17), AND 16 NUTS (18) ON BOTH SIDES OF FORWARD-REAR AXLE (9). TIGHTEN NUTS TO 150-175 LB-FT (203.4-237.3 N.m) IN SEQUENCE SHOWN.

9. INSTALL FOUR AIR HOSES (19) IN BRAKE CHAMBERS (20).

10. REPEAT STEPS 8 AND 9 FOR REAR AXLE (21).

NOTE Follow-on Maintenance:

Install rear brakeshoe and linings (TM 9-2320-363-20).

TM page 9-28 Change 1

EQUALIZING           BEAM      REPLACEMENT

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

Applicable Configuration: General Safety Instructions:

All except M915A2

WARNING

Tools and Special Equipment: Make sure all air lines and fittings are clear of debris. Failure to do so could result in Shop Equipment, SC 4910-95-CL-A31 equipment failure and/or injury to personnel. Tool Kit, SC 5180-90-CL-N05

Materials/Parts:

Adapter (4) P/N 45871

Mounting Hardware PIN 56659-001 Set

References:

TM 9-2320-363-20

Equipment Condition:

Reference Condition Description

TM 9-2320-363-20 Air System Drained

TM 9-2320-363-20 Rear Brakeshoe and Linings Removed

TM page Change 1 9-29

Illustration from TM 9-2320-363-34-1 (PDF page 641)

NOTE Procedure is the same for both sides and both ends of equalizing beam

1. USING SUITABLE LIFTING DEVICE AND JACK STANDS, LIFT AND SUPPORT REAR OF VEHICLE SO THAT WEIGHT IS RELIEVED FROM BOTH REAR SPRINGS

2. REMOVE TWO AIR HOSES (1) FROM REAR BRAKE (2).

NOTE Spider assembly consists of air brake chamber, S-cam, and slack adjuster.

3. REMOVE 16 NUTS (3), 16 WASHERS (4), 16 SCREWS (5), 16 WASHERS (6), AND SPIDER ASSEMBLY (7) FROM REAR AXLE (8).

CAUTION Place jack stand on nonbearing surface of axle. Failure to do so could result in damage to axle bearing surface.

4. USING SUITABLE JACK STAND, SUPPORT REAR AXLE (8).

TM page 9-30 Change 1

5. REPEAT STEPS 2 THRU 4 FOR FORWARD-REAR AXLE (9).

6. REMOVE FOUR NUTS (10), FOUR WASHERS (11), AND TWO SADDLE CAPS (12) FROM SPRING ASSEMBLY (13).

NOTE

When saddle caps are removed, spring assembly should raise enough to allow removal of sleeve and crosstube. If spring assembly does not raise far enough, lift vehicle enough to remove sleeve and crosstube.

7. REMOVE SLEEVE (14), CROSS TUBE (15), AND FOUR WASHERS (16) FROM EQUALIZING BEAM (17).

NOTE Perform steps 8 through 10 for M916A1 only.

8. USING FLOOR JACK, SUPPORT REAR END OF EQUALIZING BEAM (17). REMOVE NUT (18), WASHER (19), SCREW (20), WASHER (21), AND TWO ADAPTERS (22). DISCARD ADAPTERS.

9. LOWER END OF EQUALIZING BEAM (17) ONTO BLOCKS AND REMOVE INTERMEDIATE TUBE (23).

10. REPEAT STEPS 8 AND 9 FOR FRONT END OF EQUALIZING BEAM (17).

TM page Change 1 9-31

Illustration from TM 9-2320-363-34-1 (PDF page 643)

NOTE Perform steps 11 through 13 for M916A2, M917A1, and M917A1 w/MCS only.

11. USING FLOOR JACK, SUPPORT REAR END OF EQUALIZING BEAM (17). REMOVE TWO NUTS (24), WASHERS (25), AND BOLTS (26). DISCARD ALL MOUNTING HARDWARE.

NOTE Note position of shims, while lowering equalizing beam, to aid in installation.

12. LOWER REAR END OF EQUALIZING BEAM (17) AND REMOVE SHIMS (27). TAG SHIMS FOR INSTALLATION.

13. LOWER FRONT END OF EQUALIZING BEAM (17) AND REMOVE SHIMS (27). TAG SHIMS FOR INSTALLATION.

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

Inspect all parts for wear or damage.

PDF page 644

NOTE Procedure is the same for both sides and both ends of equalizing beam.

1. INSTALL INTERMEDIATE TUBE (1).

NOTE Perform steps 2 through 5 on M916A1 only.

2. USING SUITABLE LIFTING DEVICE, POSITION FRONT END OF EQUALIZING BEAM (2) IN MOUNTING BRACKET OF FORWARD-REAR AXLE (3).

NOTE Rotate adapters so flat side is vertical. Do not tighten adapters until both ends are installed.

3. INSTALL TWO NEW ADAPTERS (4), WASHER (5), SCREW (6), WASHER (7), AND NUT (8).

4. REPEAT STEPS 1 THRU 3 FOR REAR END OF EQUALIZING BEAM (2) IN REAR AXLE (9).

5. TIGHTEN TWO NUTS (8) ON BOTH ENDS OF EQUALIZING BEAM (2) TO 210-240 LB-FT (285-325 N.m).

9-32 Change 1

TM page Change 1 9-33

Illustration from TM 9-2320-363-34-1 (PDF page 645)

NOTE

l Perform steps 5.1 through 5.6 for M916A2, M917A1, and M917A1 w/MCS only.

l Same number of shims as removed must be installed, in the same location as removed from.

5.1. POSITION SHIMS (9.1) ON BAR PINS (9.2).

5.2. USING FLOOR JACK, SUPPORT AND RAISE FRONT OF EQUALIZING BEAM (2) INTO AXLE MOUNTING BRACKET (9.3).

5.3. INSTALL TWO NEW BOLTS (9.4), WASHERS (9.5), AND NUTS (9.6).

5.4. USING FLOOR JACK, SUPPORT AND RAISE REAR OF EQUALIZING BEAM (2) INTO AXLE MOUNTING BRACKET (9.3).

5.5. INSTALL TWO NEW BOLTS (9.4), WASHERS (9.5), AND NUTS (9.6).

5.6. TIGHTEN TWO FRONT AND TWO REAR NUTS (9.6) TO 450-600 LB-FT (610-814 N.m).

6. INSTALL FOUR WASHERS (10), CROSSTUBE (11), AND SLEEVE (12).

7. INSTALL TWO SADDLE CAPS (13), FOUR WASHERS (14), AND FOUR NUTS (15) ON SPRING ASSEMBLY (16). TIGHTEN NUTS TO 225-275 LB-FT (305-373 N.m).

TM page 9-34 Change 1

8. REPOSITION JACK STAND FROM STEP 4 OF REMOVAL AND INSTALL SPIDER ASSEMBLY (17), 16 WASHERS (18), 16 SCREWS (19), 16 WASHERS (20), AND 16 NUTS (21) ON FORWARD- REAR AXLE (3). TIGHTEN NUTS TO 150-175 LB-FT (203.4-237.3 N.m) IN SEQUENCE SHOWN.

WARNING Make sure all air lines and fittings are clear of debris. Failure to do so could result in equipment failure and/or injury to personnel.

9. INSTALL TWO AIR HOSES (22) IN FORWARD-REAR BRAKE CHAMBER (23).

10. REPEAT STEPS 8 AND 9 FOR REAR AXLE.

NOTE Follow-on Maintenance:

Install rear brakeshoe and linings (TM 9-2320-363-20).

TM page Change 1 10-1

This chapter illustrates and describes procedures for maintenance of the body, cab, hood, and hull and related parts. A list of tasks contained in this chapter is shown below.

Page

Seat Cover and Pad Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

Dashboard Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

Air Ducts Replacement (M915A2 and M916A1) . . . . . . . . . . . . . . . . . . . . . . . . . . 10-36

Air Ducts Replacement (All Except M915A2 and M916A1) . . . . . . . . . . . . . . . . . . 10-39.0

Front Cab Mounts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-40

Rear Cab Mounts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-49

Windshield Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-52

Cab Replacement (M915A2) ........................................ 10-64

Cab Replacement (All Except M915A2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-75

Rear Window Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-84

Cab Door Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-89

TM page 10-2