Stow manual STR36SP-SERIES-TROUBLESHOOTING Trowel, Troubleshooting

STR36SP-SERIES—TROUBLESHOOTING (TROWEL)

TABLE 6. TROUBLESHOOTING

SYMPTOM	POSSIBLE PROBLEM	SOLUTION
	Safety Stop Switch malfunction?	Make sure that the Safety Stop Switch is functioning when the
		operator is seated; replace switch if necessary.
	Fuel?	Look at the fuel system. Make sure there is fuel being supplied to
Engine running rough or not		the engine. Check to ensure that the fuel filter is not clogged.
at all.
	Ignition?	Check to ensure that the ignition switch has power and is
		functioning correctly.
	Other problems?	Consult engine manufacturer’s manual.
	Loose wire connections?	Check wiring. Replace as necessary.
Safety Stop Switch not
functioning.	Bad contacts?	Replace switch.
		Make certain blades are in good condition, not excessively worn.
		Finish blades should measure no less than 2" (50mm) from the
	Blades?	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
	Spider?	measured at the spider. A field adjustment tool is available for
		height adjustment of the trowel arms (see Optional Equipment).
	Bent trowel arms?	Check the spider assembly for bent trowel arms. If one of the
		arms is even slightly bent, replace it immediately.
If trowel “bounces, rolls		Check the trowel arm bushings for tightness. This can be done by
	Trowel arm bushings?	moving the trowel arms up and down. If there is more than 1/8"
concrete, or makes uneven
		(3.2 mm) of travel at the tip of the arm, the bushings should be
swirls in concrete”.
		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" (0.5 mm) replace the thrust collar.
		Check the thrust collar by rocking it on the spider. If it can tilt
	Thrust collar bushing?	more than 1/16" (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 free.
		Replace if necessary.
	Blade pitch?	Check blades for consistent pitch. Adjust per Maintenance section
		instructions if necessary.
		The main output shaft of the gearbox assembly should be
	Main shaft?	checked for straightness. The main shaft must run straight and
Machine has a perceptible		cannot be more than 0.003" (0.08 mm) out of round at the spider
		attachment point.
rolling motion while running.
	Yoke?	Check to make sure that both fingers of the yoke press evenly on
		the wear cap. Replace yoke as necessary.

STR36SP- SERIES • RIDE-ON POWER TROWEL — OPERATION AND PARTS MANUAL — REV. #1 (09/16/11) — PAGE 39