TRUCK SERVICE MANUAL
Make correct weight assist setting by proper shimming,
Check 4: Incorrect weight assist protrusion.
adjusting or replace front cover assembly.
Replace with correct new weight carrier assembly.
Check 5: Incorrect weights or worn weight carrier
assembly.
Check gear pump delivery.
Check 6: Gear pump delivery low.
Adjust flow meter valve.
Check 7: Flow reading incorrect.
Cause
Correction
If weight assist protrusion is within specifications, one or
Check 1: Checkpoint pressure is too low.
more shims may be added to assembly or turn adjusting
screw to obtain correct checkpoint pressure.
Check 2: Checkpoint pressure is too high,
Remove weight assist shims or adjust as required to
decrease pressure. If no shims can be removed, install
new
weight assist assembly or front cover
Complaint
Cause
Remove and check fit in throttle sleeve.
Check 1: Throttle shaft too loose.
Check fit of plunger and install correct size plunger to giv
Check 2: Pressure drop across throttle shaft over 20%.
correct pressure drop for degree of throttle travel.
Note: Be sure to re-mark throttle; or governor sleeve if
different size shaft or plunger has been installed.
539