Invacare M61, M50, M51 service manual Contamination is found. Refer to Replacing Motor

SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING

SYMPTOM	PROBABLE CAUSE	SOLUTIONS
	Damaged connector or worn	Ohm out motors. Check brushes and replace
	brushes.	brushes if necessary. Replace motor/gearbox if
	Bad motor or gear box.	high reading is present. Normal reading is 0-5
		Ohms. Refer to Motor Testing on page 31,
Motor chatters or		Replacing Motor Brushes on page 116 or
runs erratically, or		Removing/Installing the Motor on page 112.
only one motor
	Motor release lever is disengaged.	Engage motor release levers. Refer to
turns.
		Engaging/Disengaging Motor Release Lever on
		page 114.
	Controller malfunction.	Check for error codes with programmer. Refer to
		electronics manual.
Wheelchair veers	Uneven tire pressure.	Inflate tires.
to the left or right	Motors out of balance.	Replace tires if worn.
when driving on		Use programmer to balance motors.
level surface.
	Bad seal around drive shaft.	If seal is bad, replace motor/gearbox. Remove
		motor brushes and inspect for grease
		contamination. Replace motor/gearbox if
Gearbox is leaking	Loose hardware.	contamination is found. Refer to Replacing Motor
Fluid.		Brushes on page 116 or Removing/Installing the
		Motor on page 112.
		If loose hardware is found retighten hardware.
	Bad bearing in motor or gearbox.	Replace motor/gearbox. Refer to
Excessive clicking		Removing/Installing the Motor on page 112.
coming from
	Loose wheel hardware.	Tighten hardware, (use removable Loctite™on
motor/gearbox.
		hardware). Follow torque settings in this manual.
Rough driving.	Gearbox shaft movement or bent	Replace motor/gearbox. Refer to
	shaft.	Removing/Installing the Motor on page 112.
	Poor connection or worn brushes.	Check DCL connectors. Check brushes and
Motor Stutters.		replace if necessary. Refer to Replacing Motor
		Brushes on page 116.
Motor Fails to start	Battery voltage is too low.	Check batteries and recharge if necessary. Refer
	Bad Connection.	to Charging Batteries on page 104.
after initial
	Brake Disengaged.	Check connector.
installation.
		Engage brake.

Pronto® Series 26 Part No. 1125075