Cab Alligator Crossmember Replacement

TM 9-2320-363-34-1 · Chapter 8 — Frame and Towing Attachments Maintenance

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

Applicable Configuration:                           Equipment Condition (Cont):
M915A2                                              Reference               Condition Description
Tools and Special Equipment:                        TM 9-2320-363-20        Air Dryer Removed
Shop Equipment, SC 4910-95-CL-A31                   TM 9-2320-363-20        Rear Platform Removed
Tool Kit, SC 5180-90-CL-N05
                                                    TM 9-2320-363-20        Forward Driveline
Personnel Required: (3)                                                     Removed
                                                    Page 20-3               Fifth Wheel Removed
References:
                                                    Page 8-25               Overslung Crossmember
TM 9-2320-363-20                                                            Removed
Equipment Condition:                                Page 10-49              Rear Cab Mounts
                                                                            Removed
Reference                   Condition Description
                                                    Page 8-15               Rear Crossmember
TM 9-2320-363-20            Spare Wheel Hoist                               Removed
                            Removed
TM 9-2320-363-20            Left Side Platform
                            Removed
TM 9-2320-363-20            Personal Gear Storage
                            Box and Mounting
                            Bracket Removed

TM page 8-29

Illustration from TM 9-2320-363-34-1 (PDF page 567)

NOTE Following procedure is done on right side of vehicle.

1. REMOVE FOUR NUTS (1), FOUR WASHERS (2), BRACKET (3), FOUR CAPSCREWS (4), FOUR WASHERS (5), AND TWO BRACKETS (6). SET BRACKETS (3 AND 6) ASIDE.

2. REMOVE FOUR NUTS (7), FOUR WASHERS (8), BRACKET (9), FOUR CAPSCREWS (10), AND FOUR WASHERS (11). SET BRACKET ASIDE.

TM page 8-30

Illustration from TM 9-2320-363-34-1 (PDF page 568)

3. REMOVE EIGHT NUTS (12), EIGHT WASHERS (13), EIGHT CAPSCREWS (14), EIGHT WASHERS (15), AND TWO GUSSETS (16).

NOTE

During steps 4 and 5, loosen nuts only enough to allow removal of cab alligator crossmember.

4. LOOSEN FOUR NUTS (17) AT TWO REAR ENGINE MOUNTS (18).

TM page 8-31

Illustration from TM 9-2320-363-34-1 (PDF page 569)

5. LOOSEN EIGHT NUTS (19) AT MIDSHIPS ALLIGATOR CROSSMEMBER (20).

6. REMOVE SIX NUTS (21), SIX WASHERS (22), SIX CAPSCREWS (23), AND SIX WASHERS (24) FROM SUSPENSION CROSSMEMBER (25).

TM page 8-32

Illustration from TM 9-2320-363-34-1 (PDF page 570)

7. REMOVE FOUR NUTS (26), FOUR WASHERS (27), FOUR CAPSCREWS (28), AND FOUR WASHERS (29) FROM CAB ALLIGATOR CROSSMEMBER (30).

8. INSTALL HYDRAULIC SPREADER AT ANGLE GOING FROM INSIDE LOWER CORNEROF FRAME RAIL (31) TO INSIDE UPPER CORNER OF OPPOSITE FRAME RAIL (32).

NOTE

It may be necessary to further loosen nuts loosened in steps 4 and 5 if frame rails will not spread far enough apart to allow removal of cab alligator crossmember.

9. SLOWLY SPREAD FRAME RAILS (31 AND 32) ENOUGH TO ALLOW CAB ALLIGATOR CROSSMEMBER (30) TO BE TILTED AT AN ANGLE OPPOSITE OF HYDRAULIC SPREADER.

CAUTION To prevent possible damage to frame rails, spread frame rails only enough to allow removal of cab alligator crossmember.

10. CONTINUE TO SPREAD FRAME RAILS (31 AND 32) UNTIL CAB ALLIGATOR CROSSMEMBER (30) CAN BE REMOVED.

11. REMOVE CAB ALLIGATOR CROSSMEMBER (30).

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

Inspect all parts for wear or damage.

TM page 8-33

Illustration from TM 9-2320-363-34-1 (PDF page 571)

Following procedure is done on right side of vehicle.

1. INSTALL CAB ALLIGATOR CROSSMEMBER (1) AT ANGLE OPPOSITE OF HYDRAULIC SPREADER BETWEEN FRAME RAILS (2 AND 3).

2. SLOWLY RELEASE PRESSURE ON HYDRAULIC SPREADER, AND AT SAME TIME, KEEP CAB ALLIGATOR CROSSMEMBER (1) ALINED WITH FRAME RAILS (2 AND 3).

3. REMOVE HYDRAULIC SPREADER FROM FRAME RAILS (2 AND 3).

4. INSTALL FOUR WASHERS (4), FOUR CAPSCREWS (5), FOUR WASHERS (6), AND FOUR NUTS (7) ON CAB ALLIGATOR CROSSMEMBER AND FRAME RAILS (2 AND 3).

5. INSTALL SIX WASHERS (8), SIX CAPSCREWS (9), SIX WASHERS (10), AND SIX NUTS (11) AT SUSPENSION CROSSMEMBER (12).

TM page 8-34

Illustration from TM 9-2320-363-34-1 (PDF page 572)

6. TIGHTEN EIGHT NUTS (13) AT MIDSHIPS ALLIGATOR CROSSMEMBER (14).

7. TiGHTEN FOUR NUTS (15) AT REAR ENGINE MOUNTS (16).

TM page 8-35

Illustration from TM 9-2320-363-34-1 (PDF page 573)

8. INSTALL TWO GUSSETS (17), EIGHT WASHERS (18), EIGHT CAPSCREWS (19), EIGHT WASHERS (20), AND EIGHT NUTS (21).

9. INSTALL FOUR WASHERS (22), FOUR CAPSCREWS (23), BRACKET (24), FOUR WASHERS (25), AND FOUR NUTS (26).

TM page 8-36

Illustration from TM 9-2320-363-34-1 (PDF page 574)

10. INSTALL TWO BRACKETS (27), FOUR WASHERS (28), FOUR CAPSCREWS (29), BRACKET (30), FOUR WASHERS (31), AND FOUR NUTS (32).

NOTE Follow-on Maintenance:

Install spare wheel hoist (TM 9-2320-363-20). Install left side platform (TM 9-2320-363-20). Install personal gear storage box and mounting bracket (TM 9-2320-363-20). Install air dryer (TM 9-2320-363-20). Install rear platform (TM 9-2320-363-20). Install forward driveline (TM 9-2320-363-20). Install fifth wheel (page 20-3). Install overslung crossmember (page 8-25). Install rear cab mounts (page 10-49). Install rear crossmember (page 8-15).

TM page Change 1 8-37

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

Applicable Configuration:                           Equipment Condition (Cont):
All except M915A2                                   Reference               Condition Description
Tools and Special Equipment:                        Page 8-25               Overslung Crossmember
                                                                            Removed
Shop Equipment, SC 4910-95-CL-A31
Tool Kit. SC 5180-90-CL-N05                         Page 10-49              Rear Cab Mounts
                                                                            Removed
Personnel Required: (3)
                                                    Page 8-20               Rear Crossmember
References:                                                                 Removed

TM 9-2320-363-20

Equipment Condition:

Reference                 Condition Description
TM 9-2320-363-20            Fuel Tank Removed
Page 11-34                Hydraulic Winch Frame
                          Removed
Page 3-263                Transfer Case Removed
Page 20-6                   Fifth Wheel Removed

TM page 8-38

Illustration from TM 9-2320-363-34-1 (PDF page 576)

NOTE Procedure is done on right side of vehicle.

1. REMOVE FOUR NUTS (1), FOUR WASHERS (2), BRACKET (3), FOUR CAPSCREWS (4), FOUR WASHERS (5), AND TWO BRACKETS (6). SET BRACKETS (3 AND 6) ASIDE.

2. REMOVE FOUR NUTS (7), FOUR WASHERS (8), BRACKET (9), FOUR CAPSCREWS (10), AND FOUR WASHERS (11). SET BRACKET ASIDE.

TM page 8-39

Illustration from TM 9-2320-363-34-1 (PDF page 577)

3. REMOVE SEVEN NUTS (12), SEVEN WASHERS (13), SEVEN CAPSCREWS (14), SEVEN WASHERS (15), AND TWO GUSSETS (16).

4. REMOVE RIGHT REAR ENGINE MOUNT (17) IN ACCORDANCE WITH PROCEDURE ON PAGE 3-52.

TM page 8-40

Illustration from TM 9-2320-363-34-1 (PDF page 578)

NOTE Loosen nuts only enough to allow removal of cab alligator crossmember.

5. LOOSEN EIGHT NUTS (18) AT MIDSHIPS ALLIGATOR CROSSMEMBER (19).

6. REMOVE SIX NUTS (20), SIX WASHERS (21), SIX CAPSCREWS (22), AND SIX WASHERS (23) FROM SUSPENSION CROSSMEMBER (24).

TM page 8-41

Illustration from TM 9-2320-363-34-1 (PDF page 579)

7. REMOVE SIX NUTS (25), SIX WASHERS (26), SIX CAPSCREWS (27), AND SIX WASHERS (28) FROM CAB ALLIGATOR CROSSMEMBER (29).

8. INSTALL HYDRAULIC SPREADER AT ANGLE GOING FROM INSIDE LOWER CORNER OF FRAME RAIL (30) TO INSIDE UPPER CORNER OF OPPOSITE FRAME RAIL (31).

NOTE

It may be necessary to further loosen nuts loosened in step 5 if frame rails will not spread far enough apart to allow removal of cab alligator crossmember.

9. SLOWLY SPREAD FRAME RAILS (30 AND 31) ENOUGH TO ALLOW CAB ALLIGATOR CROSSMEMBER (29) TO BE TILTED AT ANGLE OPPOSITE OF HYDRAULIC SPREADER.

CAUTION To prevent possible damage to frame rails, spread frame rails only enough to allow removal of cab alligator crossmember.

10. CONTINUE TO SPREAD FRAME RAILS (30 – AND 31) UNTIL CAB ALLIGATOR CROSSMEMBER (29) CAN BE REMOVED.

11. REMOVE TWO SPACERS (32) FROM FRAME RAILS (30 AND 31).

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

Inspect all parts for wear or damage.

TM page 8-42

Illustration from TM 9-2320-363-34-1 (PDF page 580)

Procedure is done on right side of vehicle.

1. INSTALL TWO SPACERS (1) ON FRAME RAILS (2 AND 3).

2. INSTALL CAB ALLIGATOR CROSSMEMBER (4) AT ANGLE OPPOSITE OF HYDRAULIC SPREADER BETWEEN FRAME RAILS (2 AND 3).

3. SLOWLY RELEASE PRESSURE ON HYDRAULIC SPREADER, AND AT SAME TIME, KEEP CAB ALLIGATOR CROSSMEMBER (4) ALINED WITH FRAME RAILS (2 AND 3).

4. REMOVE HYDRAULIC SPREADER FROM FRAME RAILS (2 AND 3).

5. INSTALL SIX WASHERS (5), SIX CAPSCREWS (6), SIX WASHERS (7), AND SIX NUTS (8) ON CAB ALLIGATOR CROSSMEMBER (4) AND FRAME RAILS (2 AND 3).

TM page 8-43

Illustration from TM 9-2320-363-34-1 (PDF page 581)

6. INSTALL SIX WASHERS (9), SIX CAPSCREWS (10), SIX WASHERS (11), AND SIX NUTS (12) ON SUSPENSION CROSSMEMBER (13).

7. TIGHTEN EIGHT NUTS (14) AT MIDSHIPS ALLIGATOR CROSSMEMBER (15).

8. INSTALL RIGHT REAR ENGINE MOUNT (16) IN ACCORDANCE WITH PROCEDURE ON PAGE 3-52.

TM page 8-44

Illustration from TM 9-2320-363-34-1 (PDF page 582)

9. INSTALL TWO GUSSETS (17), SEVEN WASHERS (18), SEVEN CAPSCREWS (19), SEVEN WASHERS (20), AND SEVEN NUTS (21).

10. INSTALL FOUR WASHERS (22), FOUR CAPSCREWS (23), BRACKET (24), FOUR WASHERS (25), AND FOUR NUTS (26).

TM page 8-45

Illustration from TM 9-2320-363-34-1 (PDF page 583)

11. INSTALL TWO BRACKETS (27), FOUR WASHERS (28), FOUR CAPSCREWS (29), BRACKET (30), FOUR WASHERS (31), AND FOUR NUTS (32).

NOTE Follow-on Maintenance:

Install fuel tank (TM 9-2320-363-20). Install hydraulic winch frame (page 11-34). Install transfer case (page 3-263). install fifth wheel (page 20-6). Install overslung crossmember (page 8-25). Install rear cab mounts (page 10-49). Install rear crossmember (page 8-20).

TM page 8-46

Illustration from TM 9-2320-363-34-1 (PDF page 584)