TM-9-2320-361-34

2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE

MAY 1992
TM-9-2320-361-34

  TM-9-2320-361-34 - Page 44 of 764

TM9-2320-361-34
Table 2-1. Mechanical Troubleshooting (Contd).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
●
●
OUTRIGGERS
WARNING
Hydraulic fluid is under high pressure. When additional compo-
nents are required to perform troubleshooting, use equally rated
hydraulic components. Failure to use correctly rated components
may result in component failure and injury to personnel.
Eye protection is required when performing hydraulic systems
checks. Failure to do this may result in fluid contacting-eyes and
injury to personnel.
NOTE
Tag hydraulic hoses for installation.
65. OUTRIGGERS INOPERATIVE
Step
1.
Step 2.
Step 3.
Step 4.
Check hydraulic pump. Remove hydraulic hose from tee fitting below check valve. Install
test hydraulic tee into check valve hydraulic tee and install high pressure gage into test
tee. Operate outrigger control lever (TM9-2320-361-10).
a. If pressure gage reading is uneven, replace regulator valve (para. 15-46).
b. If pressure gage reading is low and uneven, replace hydraulic pump (para. 15-45).
Remove test hydraulic tee and high pressure gage. Install hydraulic hose in check valve tee.
Check control valve. Remove four hydraulic hoses from control valve. Install one tee in each
of four open ports of control valve. Install one pressure gage in each of four tees. Install
hydraulic hoses in correct tee on proper port of control valve (para. 15-46).
Operate earth boring machine hydraulic pump and outrigger control to extend outriggers
(TM9-2320-361-10). Observe pressure
gages readings.
a. If pressure reading on all gages decreases, replace control valve (para. 15-46).
b. If pressure reading on one or more gages is normal and even, repair hydraulic
cylinder(s) as appropriate (para. 15-48).
END OF TESTING!
66.
OUTRIGGERS OPERATE UNEVENLY
Step 1. Perform troubleshooting malfunction 65, steps 3 and 4.
Step 2. Replace or repair hydraulic cylinders (para. 15-48).
END OF TESTING!
67.
OUTRIGGERS WILL NOT HOLD IN EXTENDED POSITION
Complete troubleshooting malfunction 65, steps 3 and 4.
END OF TESTING!
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