MOHAWK MODEL USL-6000-K
1-8
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.
NOT RAISING LOAD
POSSIBLE CAUSE
SOLUTION
LOW HYDRAULIC FLUID LEVEL
LOWER UNIT. REMOVE RESERVOIR BREATHER CAP. FILL UNIT TO WITHIN 1/2
INCH BELOW PORT. USE DEXRON III TRANSMISSION / HYDRAULIC FLUID.
PRESSURE RELIEF ADJUSTMENT
REFER TO POWER UNIT SPECIFICATIONS.
PRESSURE RELIEF CONTAMINATION
REFER TO POWER UNIT SPECIFICATIONS. REMOVE AND CLEAN DEBRIS FROM
VALVE ASSEMBLY.
VOLTAGE TO POWER UNIT
REFER TO POWER UNIT SPECIFICATIONS. CONSULT AN ELECTRICIAN
UNIT OVERLOADED
VEHICLE TO HEAVY TO BE RAISED
NOT LOWERING
MECHANICAL LOCKS ENGAGED
RAISE UNIT. DISENGAGE MECHANICAL LOCKS.
NO AIR TO LOCK RELEASE CYLINDER
ENSURE AIR PRESSURE TO LOCK RELEASE SYSTEM (40 PSI MINIMUM)
OBSTRUCTION UNDER VEHICLE OR LIFT REMOVE
OBSTRUCTION.
RAISING UNEVEN
SHOP FLOOR UNEVEN
USE ON CLEAN, FLAT, LEVEL SURFACE.
VEHICLE NOT PROPERLY CENTERED.
MAKE NECESSARY ADJUSTMENTS TO CENTER VEHICLE.
VEHICLE C.O.G. TO BE POSITIONED OVER MARKERS INDICATED
ON SIDES OF PLATFORMS
SLOW DRIFT DOWN
POSSIBLE CAUSE
SOLUTION
SAFETIES NOT ENGAGED
RAISE UNIT TO RE-ENGAGE SAFETIES. THEN LOWER UNIT ONTO SAFETIES.
POWER UNIT LOWERING VALVE CONTAMINATION
BACK FLUSH POWER UNIT : PULL DOWN ON THE LOWERING HANDLE, THEN
ENGAGE THE UP BUTTON AT THE SAME TIME. RUN UNIT APPROX. 10 SEC.
EXTERNAL HYDRAULIC LEAKS (NOTE: TIGHTEN ALL FITTINGS PER SPECIFICATIONS.)
POSSIBLE CAUSE
SOLUTION
CYLINDER SEAL
THOROUGHLY CLEAN THE CYLINDER. VERIFY LEAK ORIGIN. FITTINGS ARE TO
BE TIGHTENED PER SPECIFICATIONS
BAD FLAIR OR FITTING
REMOVE THE HYDRAULIC TUBING AND INSPECT FLAIR AND FITTING FOR
DEFORMATION. REPLACE IF NEEDED.
BAD O-RING ( O-RING TYPE FITTINGS )
CHANGE O-RING
LOOSE PIPE FITTING
REMOVE, RESEAL, AND RE-INSTALL FITTING.
SEAL ALL PIPE FITTING CONNECTIONS WITH THREAD SEALANT MOHAWK
PART # 601-610-002
NOTE: DO NOT USE TEFLON TAPE.
Summary of Contents for USL-6000-K
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