Rear Engine Mounts Replacement

TM 9-2320-363-34-1 · Chapter 3 — Power Package Maintenance

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

Applicable Configuration:                         General Safety InstructIons:
M915A2
                                                                   WARNING
Tools and Special Equipment:                             Engine weighs 2,850 lb (1294
Tool Kit, SC 5180-90-CL-N05                              kg). Use hoist with lifting
                                                         capacity of 5,000 lb (2270 kg)
Materials/Parts:                                         to lift and support engine.
                                                         Failure to do so could result in
Isolator (4)                P/N CBA24-650-17             injury to personnel.
Nut , Lock

1.     LEFT SIDE ONLY: REMOVE TWO NUTS (l), TWO WASHERS (2), TWO SCREWS (3), AND TWO
       WASHERS (4) FROM REAR ENGINE MOUNT (5).
2.     RIGHT SIDE ONLY: REMOVE LOCK NUT (6), CLAMP (7), SCREW (8), WASHER (9), AND CLAMP
       (10) FROM BRACKET (11). DISCARD LOCK NUT.
3.     RIGHT SIDE ONLY: REMOVE TWO NUTS (12), TWO WASHERS (13), TWO SCREWS (14),
       BRACKET (11), AND WASHER (15) FROM REAR ENGINE MOUNT (5).

TM page 3-49

Illustration from TM 9-2320-363-34-1 (PDF page 115)

WARNING

Engine weighs 2,850 lb (1294 kg). Use hoist with lifting capacity of 5,000 lb (2270 kg) to lift and support engine. Failure to do so could result in injury to personnel.

CAUTION

Lift engine only enough to take weight off engine mounts. If engine is lifted too far, wiring harnesses may be crushed by cab crossmember.

4. USING SUITABLE LIFTING DEVICE, LIFT ENGINE (16) SLIGHTLY.

NOTE Steps 5 thru 7 are for left side.

5. REMOVE TWO SCREWS (17), TWO WASHERS (18), TWO SCREWS (19), AND REAR ENGINE LEG (20) FROM FLYWHEEL HOUSING (21).

6. REMOVE TWO WASHERS (22) AND TWO ISOLATORS (23) FROM REAR ENGINE MOUNT (5).

7. REMOVE THREE NUTS (24), THREE WASHERS (25), THREE SCREWS (26), THREE WASHERS (27), REAR ENGINE MOUNT (5), AND SPACER (28) FROM FRAME (29).

8. REPEAT STEPS 5 THRU 7 FOR RIGHT SIDE.

TM page 3-50

Illustration from TM 9-2320-363-34-1 (PDF page 116)

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

Inspect all parts for wear or damage.

TM page 3-51

WARNING

Engine weighs 2,850 lb (1294 kg), Use hoist with lifting capacity of 5,000 lb (2270 kg) to lift and support engine. Failure to do so could result in injury to personnel.

NOTE Steps 1 thru 3 are for right side.

1. INSTALL SPACER (1), REAR ENGINE MOUNT (2), THREE WASHERS (3), THREE SCREWS (4), THREE WASHERS (5), AND THREE NUTS (6) ON FRAME (7).

2. INSTALL TWO ISOLATORS (8) AND TWO WASHERS (9) IN REAR ENGINE MOUNT (2).

3. INSTALL REAR ENGINE LEG (10), TWO SCREWS (11), TWO WASHERS (12), AND TWO SCREWS (13) IN FLYWHEEL HOUSING (14).

4. REPEAT STEPS 1 THRU 3 FOR LEFT SIDE.

5. LEFT SIDE ONLY: INSTALL TWO WASHERS (15), TWO SCREWS (16), TWO WASHERS (17) AND TWO NUTS (18) HAND-TIGHT IN REAR ENGINE MOUNT (2).

6. RIGHT SIDE ONLY: INSTALL WASHER (19), BRACKET (20), TWO SCREWS (21), TWO WASHERS (22), AND TWO NUTS (23) ON REAR ENGINE MOUNT (2).

7. LOWER ENGINE (24) ONTO ENGINE MOUNTS AND TIGHTEN FOUR NUTS (18 and 23).

8. RIGHT SIDE ONLY: INSTALL CLAMP (25), WASHER (26), SCREW (27), CLAMP (28), AND NEW LOCK NUT (29) ON BRACKET (20).

TM page 3-52 Change 1

Illustration from TM 9-2320-363-34-1 (PDF page 118)

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

Applicable Configuration:                          General Safety Instructions:

All except M915A2
                                                                     WARNING
Tools and Special Equipment:                           Engine weighs 2,850 lb (1294 kg). Use
                                                        hoist with lifting capacity of 5,000 lb (2270
Tool Kit, SC 5180-90-CL-N05                             kg) to lift and support engine. Failure to do
                                                        so could result in injury to personnel.
Materials/Parts:
                                                         Cab weighs 1,100 lb (499 kg). Use suitable
Nut, Lock                                               jack stands to support cab. Failure to do so
                                                         could result in serious injury to personnel.

       LEFT SIDE
                                                                      RIGHT SIDE

1.     LEFT SIDE ONLY: REMOVE TWO NUTS (1), TWO WASHERS (2), TWO SCREWS (3), AND TWO
       WASHERS (4) FROM REAR ENGINE MOUNT (5).

TM page 3-53

Illustration from TM 9-2320-363-34-1 (PDF page 119)

2. RIGHT SIDE ONLY: REMOVE LOCK NUT (6), CLAMP (7), SCREW (8), WASHER (9), AND CLAMP (10) FROM BRACKET (11). DISCARD LOCK NUT.

3. RIGHT SIDE ONLY: REMOVE TWO NUTS (12), TWO WASHERS (13), TWO SCREWS (14), BRACKET (11), AND WASHER (15) FROM REAR ENGINE MOUNT (5).

WARNING

Engine weighs 2,850 lb (1294 kg). Use hoist with lifting capacity of 5,000 lb (2270 kg) to lift and support engine. Failure to do so could result in injury to personnel.

CAUTION

Lift engine only enough to take weight off engine mounts. If engine is lifted too far, wiring harnesses may be crushed by cab crossmember.

4. USING SUITABLE LIFTING DEVICE, LIFT ENGINE (16) SLIGHTLY.

NOTE Steps 5, 6, and 8 are for left side.

5. REMOVE TWO SCREWS (17), TWO WASHERS (18), TWO SCREWS (19), AND REAR ENGINE LEG (20) FROM FLYWHEEL HOUSING (21).

6. REMOVE TWO WASHERS (22) AND TWO ISOLATORS (23) FROM REAR ENGINE MOUNT (5).

WARNING Cab weighs 1,100 lb (499 kg). Use suitable jack stands to support cab. Failure to do so could result in serious injury to personnel.

7. USING SUITABLE JACK STANDS, SUPPORT CAB AT CAB MOUNTS (24) AS CLOSE TO FRAME RAIL (25) AS POSSIBLE.

8. REMOVE SIX NUTS (26), SIX WASHERS (27), SIX SCREWS (28), SIX WASHERS (29), AND REAR ENGINE MOUNT (5) FROM FRAME RAIL (25).

9. REPEAT STEPS 5, 6, AND 8 FOR RIGHT SIDE.

TM page 3-54

Illustration from TM 9-2320-363-34-1 (PDF page 120)

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

Inspect all parts for wear or damage.

TM page 3-55

Illustration from TM 9-2320-363-34-1 (PDF page 121)

WARNING

Engine weighs 2,850 lb (1294 kg). Use hoist with lifting capacity of 5,000 lb (2270 kg) to lift and support engine. Failure to do so could result in injury to personnel.

NOTE Steps 1 thru 3 are for right side.

1. INSTALL REAR ENGINE MOUNT (1), SIX WASHERS (2), SIX SCREWS (3), SIX WASHERS (4), AND SIX NUTS (5) ON FRAME RAIL (6).

2. INSTALL TWO ISOLATORS (7) AND TWO WASHERS (8) IN REAR ENGINE MOUNT (1).

3. INSTALL REAR ENGINE LEG (9), TWO SCREWS (10), TWO WASHERS (11), AND TWO SCREWS (12) IN FLYWHEEL HOUSING (13).

4. REPEAT STEPS 1 THRU 3 FOR LEFT SIDE.

5. REMOVE JACK STANDS FROM CAB MOUNTS (14).

6. LEFT SIDE ONLY: INSTALL TWO WASHERS (15), TWO SCREWS (16), TWO WASHERS (17), AND TWO NUTS (18) HAND-TIGHT IN REAR ENGINE MOUNT (l).

7. RIGHT SIDE ONLY: INSTALL WASHER (19), BRACKET (20), TWO SCREWS (21 ), TWO WASHERS (22), AND TWO NUTS (23) ON REAR ENGINE MOUNT (1).

8. LOWER ENGINE (24) ONTO ENGINE MOUNTS AND TIGHTEN FOUR NUTS (18 and 23).

9. RIGHT SIDE ONLY: INSTALL CLAMP (25), WASHER (26), SCREW (27), CLAMP (28), AND NEW LOCK NUT (29) ON BRACKET (20).

TM page 3-56

Illustration from TM 9-2320-363-34-1 (PDF page 122)