Use this as a reference for the location and
correction of problems in the power train. When more
checking is necessary, use the 5P6225, 7S8875 or
8M2736 Hydraulic Test Box.
Always make visual checks first. Then check the
operation of the machine and go on to check with the
Check the oil level in the transmission.
Check all oil lines, hoses and connections for
leaks and damage. Look for oil on the ground
under the machine.
Move the selector handle to all REVERSE and
all FORWARD positions. The detents must be
felt in all positions.
Let the oil out of the filter housing. Remove and
check the filter element for loose particles.
Also, check the magnetic strainer.
indication of a clutch failure.
Shiny steel particles give the indication of
a clutch failure.
Rubber particles give an indication of a
seal failure or hose failure.
Aluminum particles give an indication of a
torque converter failure.
components of the transmission hydraulic system must
be washed clean. Do not use parts with damage. Use
CHECKS DURING OPERATION.
With the engine running, move the selector lever
to all speed positions. The detents must be felt in all
Operate the machine in each direction and in all
speeds. Make note of all noises that are not normal and
find their sources. If the operation is not correct, make
reference to the CHECK LIST DURING OPERATION
for "problems," "probable causes," and "recommended
CHECK LIST DURING OPERATION
RECOMMENDED CORRECTIVE ACTION
Transmission does not operate in any speed or
does not engage (slips) in all speeds.
Low oil pressure.
Low oil level.
Control linkages loose or adjustment not
Failure of the oil pump or the pump drive.
Air leaks on inlet side of pump.
Leakage inside the transmission.
Adjustment of the modulation relief valve
not correct, or valve does not close.
Load piston or differential and safety
valve will not close.
Check oil level, adjust as needed.
Check control linkage for proper
Repair or replace oil pump/pump
Repair or replace pump.
Check modulation relief valve for
proper adjustment. If valve does
not close, repair or replace as
piston/differential and safety valve.
Mechanical failure in transmission.
Repair or replace parts as necessary.
Failure of the torque converter.
Repair or replace as necessary.
Failure of the differential or the final drive
Repair or replace the differential/final