99903514:TELESCOPIC CRANE:
2-22 SECTION 2: MAINTENANCE
2-16: WINCH TROUBLESHOOTING
POSSIBLE CAUSE PROBABLE CURE
TOO MUCH LOAD. RIG TO REDUCE LOADING ON WINCH.
LOW OR NO GEARBOX OIL. CHECK OIL LEVEL. ADD PROPER OIL IF NECESSARY.
MOTOR INLET PRESSURE IS LESS THAN TEST HYDRAULIC PUMP. CHECK MAIN RELIEF -
SPECIFICATIONS WITH LOAD STALLED. MODEL 1015 - 2250 PSI
MODEL 2020 - 2350 PSI
MODELS 3020, 3820, 5020, 5525, 6025, 6625 - 3000 PSI
MODEL 7020/7025 - 2500 PSI
BRAKE SHOULD ENGAGE IN PAYOUT RUN WINCH WITH NO LOAD IN BOTH DIRECTIONS.
DIRECTION ONLY. SYSTEM PRESSURE SHOULD BE SLIGHTLY
HIGHER IN PAYOUT DIRECTION.
CHECK FLOW TO WINCH MOTOR WITH TEST PUMP IF NOT TO SPECIFICATION.
WINCH UNDER LOAD.
CHECK END PLAY IN WORM. IF GREATER THAN 0.030", INSPECT WORM BEARINGS
FOR WEAR. REPLACE IF NECESSARY.
BRAKE MAY NEED ADJUSTMENT. TURN ADJUSTING SCREW CLOCKWISE 1/4 TURN AT A
TIME. RE-TEST WINCH.
BRAKE DISCS MAY BE WORN. INSPECT. REPLACE IF NECESSARY. RETEST.
CAM CLUTCH IN BRAKE MAY BE REVERSE CLUTCH. RETEST.
INSTALLED INCORRECTLY.
JOURNAL ON WORM WHERE CAM CLUTCH INSPECT. REPLACE WORM IF NECESSARY.
RUNS MAY BE GALLED OR WORN.
SYSTEM MAY HAVE LOW FLOW. INSTALL FLOW METER IN SYSTEM. TEST UNDER LOAD.
IF FLOW IS BELOW SPECIFICATIONS, INSPECT PUMP.
MOTOR WORN OUT. REPLACE MOTOR.
(RELIEF VALVE OPENS W/O WINCH TURNING.)
MOTOR SEIZED UP. REMOVE MOTOR FROM WINCH. TEST IF OPERABLE.
IF NOT, REPLACE MOTOR.
WORM AND GEAR SET DAMAGED. REPAIR GEARBOX.
WINCH WON'T LIFT HEAVY LOADS.
WINCH WON'T HOLD LOAD.
WINCH RUNS TOO SLOWLY.
WINCH WILL NOT RUN UNDER LOAD.
20030115
To Next Page
Loading...
Need help?
General
