Troubleshooting - MULTIQUIP Whiteman J36H55 Operation And Parts Manual

Symptom
Engine running rough or not at all.
Trowel bounces, rolls concrete, or makes
uneven swirls in concrete.
PAGE 38 — J36/M30 WALK-BEHIND TROWEL — OPERATION AND PARTS MANUAL — REV. #10 (05/07/12)
Troubleshooting (Walk-Behind Trowel)
Possible Problem
Engine ON/OFF Switch in "OFF" position
or malfunctioning?
Centrifugal stop switch malfunction? (if
applicable)
Fuel?
Ignition?
Loose wire connections
Bad contacts in ON/OFF switch?
Blades?
Pitch adjustment?
Bent trowel arms?
Spider?
Thrust collar?
Thrust collar bushing?
Thrust bearing worn?

TROUBLESHOOTING

Solution
Make sure that the Engine ON/OFF Switch is ON
or replace switch if necessary.
Make sure that the centrifugal stop switch is
functioning when the operator is seated. Replace
switch if necessary.
Look at the fuel system. Make sure there is fuel
being supplied to the engine. Check to ensure that
the fuel filter is not clogged.
Check to ensure that the ignition switch has power
and is functioning correctly.
Check wiring. Replace or repair as necessary.
Replace ON/OFF switch.
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.
Check that all blades are set at the same
pitch angle as measured at the spider. A field
adjustment tool is available for height adjustment
of the trowel arms. (Contact Parts Dept.)
Check the spider assembly for bent trowel arms.
If one of the arms is even slightly bent, replace it
immediately.
Check fit 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.
Check the flatness 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.
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.
Check the thrust bearing to see that it is spinning
freely. Replace if necessary.