Multiquip J36E2 - Manual (Page 30)

page 30 — J36e2 elecTric WalK-BeHiND TrOWel • OperaTiON aND parTs maNUal — rev. #0 (07/24/12)
trOubleshOOting
Troubleshooting (Walk-Behind Trowel)
symptom possible problem solution
Trowel bounces, rolls concrete, or makes
uneven swirls in concrete.
Blades?
Make certain blades are in good condition, not
excessively worn. Finish blades should measure
no less than 2"" (50mm) from the blade bar to
the trailing edge, combo blades should measure
no less that 3.5"" (89mm). Trailing edge of blade
should be straight and parallel to the blade bar.
Pitch adjustment?
Check that all blades are set at the same
pitch angle as measured at the spider. A fi eld
adjustment tool is available for height adjustment
of the trowel arms. (Contact Parts Dept.)
Bent trowel arms?
Check the spider assembly for bent trowel arms.
If one of the arms is even slightly bent, replace it
immediately.
Spider?
Check fi t of arms in spider. This can be done by
moving the trowel arms up and down. If there is
more than 1/8 inch (3.2 mm) of travel at the tip of
the arm, the spider and arms should be replaced.
Thrust collar?
Check the fl atness of the thrust collar by rotating
it on the spider. If it varies by more than 0.02 inch
(0.5 mm) replace the thrust collar.
Thrust collar bushing?
Check the thrust collar by rocking it on the spider.
If it can tilt more than 3/32 inch (2.4 mm) - as
measured at the thrust collar O.D., replace the
thrust collar.
Thrust bearing worn?
Check the thrust bearing to see that it is spinning
freely. Replace if necessary.
Machine has a perceptible rolling motion
while running
Main shaft?
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.
Yoke?
Check to make sure that both fi ngers of the yoke
press evenly on the wear cap. Replace yoke as
necessary.
Blade Pitch?
Check to ensure that each blade is adjusted to
have the same pitch as all other blades. Adjust
per maintenance section in manual.
Troubleshooting (electric motor)
symptom possible cause solution
Electric motor will not start.
Is there power?
Check power source. Check reset
button.
Is power cable plugged in? Plug in power cable.
Is ON/OFF switch placed in ON
position?
Place ON/OFF switch in ON position.
Defective cable? Check cable.
Electric motor continuously stops. Reset button OK? Check power source.
Electric motor RPM's too low. Low voltage? Check input voltage.
Electric motor RPM's too high. High voltage? Check input voltage.