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B-SERIES TROWEL — TROUBLESHOOTING
TROUBLESHOOTING
SYMPTOM
POSSIBLE PROBLEM
SOLUTION
Engine running rough or not at all.
Kill switch off or malfunctioning? Make sure that the kill switch is on or replace switch if necessary.
Other problems? Consult engine manufacture's manual.
Safety kill switch not functioning.
Loose wire connections? Check wiring. Replace switch if necessary.
Bad contacts? Replace switch.
Clutch slipping or sluggish response to engine speed change.
Worn belts? Replace.
Dirty centrifugal clutch? Disassemble and clean the clutch.
Worn out centrifugal clutch? Replace entire clutch.
Hand clutch out of adjustment? Adjust as per instructions in Maintenance section.
Worn hand clutch parts? Replace parts as necessary.
Worn bearings in gearbox? Rotate input shaft by hand. If it rotates with difficulty check the input and output shaft bearings. Replace
if necessary.
Worn or broken gears in gearbox? Check in particular to verify that the gearbox output shaft rotates when the input shaft is rotated.
Replace both worm and worm gear as a set.
If 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" (50 mm) from
the blade bar to the trailing edge, combo blades should measure no less than 3-1/2" (89mm). Trailing edge of blade should be straight
and parallel to the blade bar.
Spider? 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 (see Optional Equipment section).
Bent trowel arms? Check the spider assembly for bent trowel arms. If one of the arms is even slightly bent, replace immediately.
Trowel arm bushings? Check the trowel arm bushing for tightness. This can be done by moving the trowel arms up and down. If there
is more than 1/8" (3.2mm) of travel at the tip of the arm, the bushings should be replaced. All bushings should be replaced at the same
time.
Thrust collar? Check the flatness of the thrust collar by rotating it on the spider. If it varies by more than 0.02" (0.5mm) replace the thrust
collar.
Thrust collar bushings? Check the thrust collar by rocking it on the spider. If it tilts more than 1/16" (1.6mm) (as measured at the thrust
collar O.D.), the bushing in the thrust collar should be replaced.
Thrust bearing worn? Check the thrust bearing to see that it is spinning free and has not worn into the thrust cap. 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" (0.08mm) out of round at the spider attachment point.
Blade pitch? Check blades for consistent pitch. Adjust per Maintenance section instructions if necessary.
B-SERIES TROWEL — PARTS & OPERATION MANUAL — REV. #0 (12/03/01) — PAGE 15
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