Mohawk FL-25, Manual, Page: 18 / 58

MOHAWK MODEL TR-25A, FL-25, TR-19
18
TROUBLE SHOOTING
WARNING : NEVER ATTEMPT TO LOOSEN HYDRAULIC FITTINGS, OR OVERRIDE SAFETY DEVICES IN AN
ATTEMPT TO CORRECT A PROBLEM. ALL TEST 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.
DEBRIS IN POSTS ( TOOLS ETC. ) CLEAN UNIT
OBSTRUCTION UNDER VEHICLE OR LIFT REMOVE OBSTRUCTION.
RAISING UNEVEN
POSTS OUT OF SQUARE VERIFY LEVEL. MAKE ANY AND ALL NECESSARY ADJUSTMENTS.
SHOP FLOOR UNEVEN VERIFY PROPER INSTALLATION
RAISING UNEVEN CONT.
POST NOT SHIMED CORRECTLY SHIM POST
CHAIN OUT OF ADJUSTMENT ADJUST CHAINS
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 HOSE 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.