TM-9-2320-272-24-2

TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)

TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 2 OF 4

JUNE 1998

TM-9-2320-272-24-2 - Page 698 of 991

TM 9-2620-272-24-2

Table 4-1. Mechanical Troubleshooting (Contd).

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Prepare hydraulic system for test.

a.

b.

C.

d.

e.

f.

g.

h.

i.

j.

k.

NOTE

l

Perform steps a. and b. for M930/A1/A2 model vehicles.

l

Tag all hoses for installation.

Disconnect front winch input hose (2) and output hose (1) from elbows (5) and (6) at

control valve (7).

Install appropriate caps (3) and plugs (4) on elbows (5) and (6) and hoses (1) and (2) to

block hydraulic oil flow.

Disconnect supply hose (11) and return hose (10) from elbows (17) and (18) at control

valve (7).

Install appropriate caps (8) and plugs (9) on elbows (17) and (18) and hoses (10) and (11).

Disconnect line (14) from adapters (13) and (15).

Remove adapter (15) from elbow (16).

Install appropriate nipple (29) and tee (19) on elbow (16).

Install appropriate connector (23), reducer (24), nut (25), flowmeter (Appendix E, Item

169) (20), and connector (21) on tee (19).

Install appropriate hose (22) on connector (21) and adapter (13) at winch pump (12).

Install appropriate connector (27) and hose (26) on pressure gauge (Appendix E, Item

168) (28).

Install pressure gauge (28) with hose (26) on reducer (24).

M930/A1/A2

4-16