Multiquip HHXG5 operation manual Troubleshooting, Symptom Possible problem Solution

		TROUBLESHOOTING
	Troubleshooting (Ride-On 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
		fi lter 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 fi eld 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 fl atness 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 fi ngers 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 48 — HHXg5 RIDE-ON TROWEL • operation manual — rev. #1 (10/25/10)