TM 9-2320-260-34-2
15-26. RETRACTABLE BEAM REPLACEMENT
THIS TASK COVERS:
a. Removal
b. Installation
INITIAL SETUP
APPLICABILE MODELS
REFERENCES (TM)
M820, M820A1, M820A2
TM 9-237
TM 9-2320-260-10
TOOLS
TM 9-2320-260-34P-2
General mechanic's tool kit
EQUIPMENT CONDITION
(Appendix B, Item 1)
q Parking brake set (TM 9-2320-260-10).
MATERIALS/PARTS
q Van body sides fully expanded and secured
Two locknuts (Appendix D, Item 195)
(TM 9-2320-260-10).
Seal (Appendix D, Item 445)
q Retractable beam rollers removed (para. 15-27).
Seal (Appendix D, Item 441)
q Retractable beam driveshaft and lock removed
Seal (Appendix D, Item 442)
CAUTION
Remove and install retractable beam slowly from underframe.
Failure to do so may result in damage to retractable beam.
1. Break welds between side panel (1) and side panel support ( 13) (TM 9-237) and remove retractable
beam (12) frorn side panel (1).
2. Remove retractable beam (12) from underframe (3) at channel (4) by sliding under side panel (1).
3. Remove two locknuts (6), washers (7), screws (11), seven screws (10), retainer (9), and seals (8), (2),
and (5) from underframe (3). Discard locknuts (6) and seals (8), (2), and (5).
1. Install new seals (5), (2), and (8) and retainer (9) on underframe (3) with seven screws (10), two
screws (11), washers (7), and new locknuts (6).
2. Install retractable beam (12) in underframe (3) at channel (4) by sliding under side panel (1).
3. Weld side panel (1) to side panel support (13) (TM 9-237).
15-80
