Troubleshooting - MULTIQUIP js36h55 Operation And Parts Manual

Symptom
Machine has a perceptible rolling motion
while running.
Clutch slipping or sluggish response to
engine speed change.
Trowel blades do not rotate.
jS36 SeRIeS WaLK-BeHINDTROWeL • OpeRaTION aND paRTS maNUaL — Rev. #4 (11/01/13) — page 41
Troubleshooting (Walk-Behind Trowel) - continued
possible problem
Main shaft?
Yoke?
Blade Pitch?
Worn V-belts?
Hand clutch out of adjustment?
Worn or defective hand clutch parts?
Worn bearings in gearbox?
Worn or broken gears in gearbox?
Defective clutch?
Broken V-belt?
Defective ON/OFF switch?
Defective centrifugal ON/OFF switch?

troubleshooting

Solution
The main output shaft of the gearbox
assembly should be checked for straightness.
The main shaft must run straight and cannot
be more than 0.003"" (0.08 mm) out of round
at the spider attachment point.
Check to make sure that both fi ngers of the
yoke press evenly on the wear cap. Replace
yoke as necessary.
Check to ensure that each blade is adjusted
to have the same pitch as all other blades.
Adjust per maintenance section in manual.
Replace V-belt.
Adjust per instructions in maintenance
section of this manual.
Replace parts as necessary.
Rotate input shaft by hand. If shaft rotates
with diffi culty, check the input and output
shaft bearings. Replace as necessary.
Verify that the gearbox shaft rotates when
the input shaft is rotated. Replace both the
worm and worm gear as a set.
Replace clutch.
Replace V-belt.
Check and replace ON/OFF switch if
necessary.
Check and replace centrifugal ON/OFF
switch if necessary.