TM 9-2320-272-24-2
3-248. TRACTOR FIFTH WHEEL REPLACEMENT
THIS TASK COVERS:
b. Installation
a. Removal
INITIAL SETUP:
REFERENCES (TM)
APPLICABLE MODELS
LO 9-2320-272-12
M931/A1/A2, M932/A1/A2
TM 9-2320-272-10
TOOLS
TM 9-2320-272-24P
General mechanic's tool kit (Appendix E. Item 1)
EQUIPMENT CONDITION
Torque wrench (Appendix E, Item 144)
Parking brake set (TM 9-2320-272-10).
Lifting device
Utility chain
GENERAL SAFETY CONDITIONS
MATERIALS/PARTS
Personnel must stand clear during lifting operation.
Ten lockwashers (Appendix D, Item 399)
All personnel must stand clear during lifting operations. A shifting
load may cause injury to personnel.
a. Removal
Remove ten screws (7) and lockwashers (6) from fifth wheel (3) and base support (5). Discard
1.
lockwashers (6).
NOTE
Ensure washers are between head of screws and fifth wheel, and
chain links and nuts.
Attach utility chain on fifth wheel (3) with two screws (4), four washers (1), and two nuts (2).
2.
NOTE
Assistant will help with step 3.
Attach lifting device to chain, and remove fifth wheel (3) from base support (5).
3.
Remove lifting device from chain.
4.
Remove two nuts (2), four washers (1), two screws (4). and utility chain from fifth wheel (3).
5.
b. Installation
Install utility chain on fifth wheel (3) with two screws (4), four washers (1), and two nuts (2).
1.
NOTE
Assistant will help with step 2.
Using lifting device attached to chain, raise fifth wheel (3) and lower onto base support (5). Align
2.
fifth wheel (3) with base support (5) and install with ten new lockwashers (6) and screws (7).
Tighten screws (7) 160-170 lb-ft (217-231 Nm).
Remove lifting device from utility chain, two nuts (2), four washers (1), two screws (4), and utility
3.
chain from fifth wheel (3).
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