TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
58. BOOM SWING OPERATION ERRATIC IN EITHER DIRECTION
Step 1.
Defective main hydraulic relief valve.
a. Check relief valve adjustment. (Refer to page 16-54.)
If OK, do Step 2.
b. Contact Direct Support Maintenance to replace relief
valve.
Step 2.
Insufficient lubricant on swing bearing.
a. Lubricate bearing. (Refer to LO 5-3810-306-12).
Step 3.
Restricted or partly clogged hydraulic hose or fitting.
a. Remove and inspect hydraulic hoses and fittings. If
OK, do Step 4.
b. Replace hose or fittings. (Refer to page 16-18.)
Step 4.
Pump cavitation in swing section.
a. Retighten suction hose or replace any damaged fitting.
WARNING
Do not torque turntable bolt two times without replacing the
bolts. Failure to follow this procedure could result in a
serious accident.
Step 5.
Improperly torqued turntable bolts.
a. Contact Direct Support Maintenance to check torque on
turntable bolts. If OK, do Step 6.
Step 6.
Defective swing system.
a. Contact Direct Support Maintenance.
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