TM 5-3810-306-20
TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
65. BOOM SWINGS SLOWLY
Step 1.
Insufficient hydraulic volume.
a. Check delivery of two-section hydraulic pump. Ensure
sufficient oil is available to pump. If OK, do Step
2.
Step 2.
Defective swing system.
a. Contact Direct Support Maintenance.
66. SWING MOTOR CONTINUES TO OPERATE WHEN SWING CONTROL IS IN NEUTRAL POSITION
Step 1.
Hydraulic control valve spool sticking or valve otherwise
damaged.
a. Replace hydraulic control valve. (Refer to page 16-
2.)
67. SWING MOTOR TURNING IN WRONG DIRECTION
Step 1.
Port connections reversed.
a. Reverse port connections. (Refer to figure FO-1.)
68. SWING MOTOR NOISY
Step 1.
Air in hydraulic system.
a. Bleed air from hydraulic system. (Refer to page
16-52.)
Step 2.
Defective swing motor.
a. Contact Direct Support Maintenance.
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