TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
43. BOOM LOWERS ERRATICALLY
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
hydraulic relief valve.
Step 2.
Air in hydraulic cylinders.
a. Bleed air from hydraulic system. (Refer to page
16-52.)
Step 3.
Control valve linkage out of adjustment.
a. Check valve linkage adjustment. If OK, do Step 4.
b. Adjust linkage to obtain full control valve spool
travel. (Refer to page 16-2.)
Step 4.
Defective hydraulic pump.
a. Contact Direct Support Maintenance.
44. BOOM RAISES SLOWLY
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
hydraulic 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.)
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