TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
46. BOOM WILL NOT RAISE
Step 1.
Defective main hydraulic relief valve.
a. Check main hydraulic relief valve adjustment. (Refer
to page 16-54.) If OK, do Step 2.
b. Contact Direct Support Maintenance to replace main
relief valve.
Step 2.
Control valve linkage out of adjustment.
a. Check valve linkage adjustment. If OK, do Step 3.
b. Adjust linkage to obtain full control valve spool
travel. (Refer to page 16-2.)
Step 3.
Defective hydraulic control valve.
a. Remove and inspect hydraulic control valve. If OK, do
Step 4.
b. Replace hydraulic control valve. (Refer to page
16-2.)
Step 4.
Defective hydraulic pump.
a. Contact Direct Support Maintenance.
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