TM 5-3810-306-20TABLE 3-1. ORGANIZATIONAL TROUBLESHOOTING (CONTD)MALFUNCTIONTEST OR INSPECTIONCORRECTIVE ACTION65. BOOM SWINGS SLOWLYStep 1.Insufficient hydraulic volume.a. Check delivery of two-section hydraulic pump. Ensuresufficient oil is available to pump. If OK, do Step2.Step 2.Defective swing system.a. Contact Direct Support Maintenance.66. SWING MOTOR CONTINUES TO OPERATE WHEN SWING CONTROL IS IN NEUTRAL POSITIONStep 1.Hydraulic control valve spool sticking or valve otherwisedamaged.a. Replace hydraulic control valve. (Refer to page 16-2.)67. SWING MOTOR TURNING IN WRONG DIRECTIONStep 1.Port connections reversed.a. Reverse port connections. (Refer to figure FO-1.)68. SWINGMOTORNOISYStep 1.Air in hydraulic system.a. Bleed air from hydraulic system. (Refer to page16-52.)Step 2.Defective swing motor.a. Contact Direct Support Maintenance.3-50
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