MOHAWK MODEL ML-220
HYDRAULIC SAFETY CHECKS / TROUBLE SHOOTING
WARNING:
NEVER ATTEMPT TO LOOSEN HYDRAULIC FITTINGS, OR OVERRIDE SAFETY
DEVICES IN AN ATTEMPT TO CORRECT A PROBLEM. ALL TESTS ARE TO BE PERFORMED
WITH
NO
VEHICLE.
NOTE:
THE HYDRAULIC SAFETY CHECK IS TO BE PERFORMED WITH NO VEHICLE ON THE
UNIT. THE HYDRAULIC SYSTEM CHECKS WILL DETECT INTERNAL HYDRAULIC LEAKS.
CONTACT YOUR LOCAL MOHAWK DISTRIBUTOR OR THE MOHAWK FACTORY SERVICE
DEPARTMENT IF A CHECK SHOULD FAIL.
MAINSIDE SAFETY CHECK:
1.
RAISE THE UNIT APPROXIMATELY 3 FEET
2.
DISENGAGE THE
OFFSIDE
MECHANICAL SAFETY
3.
LOWER THE UNIT ONTO THE
MAINSIDE
MECHANICAL
SAFETY
4.
WHILE CONTINUING TO HOLD DOWN THE POWER UNIT
LOWERING HANDLE, OBSERVE THE
OFFSIDE
CARRIAGE FOR MOVEMENT. THE UNIT HAS CHECK
OUT OK IF THERE IS NO MOVEMENT (
OFFSIDE
CARRIAGE DOES NOT CONTINUE TO LOWER)
OFFSIDE SAFETY CHECK:
1.
RAISE THE UNIT APPROXIMATELY 3 FEET
2.
DISENGAGE THE
MAINSIDE
MECHANICAL SAFETY
3.
LOWER THE UNIT ONTO THE
OFFSIDE
MECHANICAL
SAFETY
4.
WHILE CONTINUING TO HOLD DOWN THE POWER UNIT
LOWERING HANDLE, OBSERVE THE
MAINSIDE
CARRIAGE FOR MOVEMENT. THE UNIT HAS CHECK
OUT OK IF THERE IS NO MOVEMENT (
MAINSIDE
CARRIAGE DOES NOT CONTINUE TO LOWER)
OFFSIDE CYLINDER / DIVERTER VALVE CHECK:
(TO BE PERFORMED WHEN OFFSIDE CYLINDER DRIFTS
DOWN)
1.
RAISE THE UNIT APPROXIMATELY 3 FEET
2.
DISENGAGE BOTH MECHANICAL SAFETIES
3.
REMOVE THE BLEED LINE FROM THE TOP OF THE
OFFSIDE CYLINDER AND CAP USING MOHAWK PN #601-
420-001.
4.
IF THE OFFSIDE CYLINDER NO LONGER DRIFTS DOWN,
THEN THE OFFSIDE CYLINDER WILL NEED TO BE
SERVICED.
5.
IF THE OFFSIDE CYLINDER CONTINUES TO DRIFT
DOWN, THEN THE DIVERTER PULL VALVE WILL NEED
TO BE SERVICED.
MAINSIDE CYLINDER PISTON CHECK:
(THIS CHECK IS TO BE PERFORMED AFTER ALL THE OTHER
HYDRAULIC SAFETY CHECKS HAVE BEEN PERFORMED)
1.
RAISE A VEHICLE SO THAT ALL FOUR TIRES ARE OFF
THE FLOOR.
2.
MEASURE AND RECORD THE CARRIAGE HEIGHTS ON
THE MAINSIDE AND OFFSIDE.
3.
CYCLE THE LIFT UP AND DOWN FOUR TIMES WITHOUT
GOING TO FULL HEIGHT OR LETTING THE VEHICLE
TIRES CONTACT THE FLOOR.
4.
LOWER THE UNIT, STOPPING WHEN THE TIRES ARE AT
THE APPROXIMATE HEIGHT AT THE BEGINNING.
5.
MEASURE MAINSIDE AND OFFSIDE CARRIAGE
HEIGHTS AGAIN.
6.
THE CHECK HAS FAILED IF THE MEASUREMENTS
CHANGE MORE THAN
¼
INCH.
Summary of Contents for ML-220
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