Multiquip N/A manual HTH Troubleshooting

			HTH — TROUBLESHOOTING
	Troubleshooting (Ride-On Mechanical Trowel)
Symptom		Possible Problem		Solution
		Stop switch malfunction?		Make sure that the stop switch is functioning when the
				operator is seated. Replace switch if necessary.
				Look at the fuel system. Make sure there is fuel being
Engine running rough or not at all.		Fuel?		supplied to the engine. Check to ensure that the fuel
				filter is not clogged.
		Ignition?		Check to ensure that the ignition switch has power and
				is functioning correctly.
		Bad contacts?		Replace switch.
Safety stop switch not functioning.		Loose wire connections?		Check wiring. Replace as necessary.
		Other problems?		Consult engine manufacturer’s manual.
				Make sure blades are in good condition, not excessively
				worn. Finish blades should measure no less than 2
		Blades?		inches (50mm) from the blade bar to the trailing edge,
				combo blades should measure no less that 3.5 inches
				(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
		Pitch Adjustment?		as measured at the spider. A field adjustment tool
				is available for height adjustment of the trowel arms
				(contact Parts Department).
		Bent trowel arms?		Check the spider assembly for bent trowel arms. If one
				of the arms is even slightly bent, replace it immediately.
Trowel bounces, rolls concrete, or makes uneven
				Check the trowel arm bushings for tightness. This can
swirls in concrete.				be done by moving the trowel arms up and down. If
		Trowel arm bushings?		there is more than 1/8 inch (3.2 mm) of travel at the
				tip of the arm, the bushings should be replaced. All
				bushings should be replaced at the same time.
				Check the flatness of the thrust collar by rotating it on
		Thrust collar?		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
		Thrust collar bushing?		can tilt more than 1/16 inch (1.6 mm) - as measured at
				the thrust collar O.D., replace the bushing in the thrust
				collar.
		Thrust bearing worn?		Check the thrust bearing to see that it is spinning freely.
				Replace if necessary.
				The main output shaft of the gearbox assembly should
		Main shaft?		be checked for straightness. The main shaft must run
				straight and cannot be more than 0.003 inch (0.08 mm)
Machine has a perceptible rolling motion while				out of round at the spider attachment point.
				Check to make sure that both fingers of the yoke press
running.		Yoke?
				evenly on the wear cap. Replace yoke as necessary.
				Check to ensure that each blade is adjusted to have the
		Blade Pitch?		same pitch as all other blades. Adjust per maintenance
				section in manual.

PAGE 24 — HTH-8 FT. RIDE-ON POWER TROWEL — OPERATION AND PARTS MANUAL — REV. #6 (02/22/11)