Motor/Gearbox/Brake - Invacare Pronto M41 Service Manual

Motor/Gearbox/Brake

SYMPTOM
Bad bearings.
Motor makes a
Raised commutator plate inside of
clicking noise.
motor.
Grinding noise or Bad bearings. Bad gears.
motor is locking
up.
Motors stall and Current rollback.
starts up again.
Damaged connector or worn
brushes.
Bad motor or gear box.
Motor chatters or
runs erratically, or
only one motor Motor release lever is disengaged.
turns.
Controller malfunction.
Wheelchair veers Uneven tire pressure.
to the left or right Motors out of balance.
when driving on
level surface.
Bad seal around drive shaft.
Gearbox is leaking
fluid. Loose hardware.
Bad bearing in motor or gearbox.
Excessive clicking
coming from
Loose wheel hardware.
motor/gearbox.
Rough driving. Gearbox shaft movement or bent
shaft.
Poor connection or worn brushes.
Motor stutters.
Part No 1145724
SECTION 3—SAFETY INSPECTION/TROUBLESHOOTING
PROBABLE CAUSE
23
SOLUTIONS
If bearings are bad, replace motor. Refer to
Removing/Installing the Motor on page 67.
Ohm out motor and replace motor if high reading
is present. Normal reading is 0.5-5 Ohms. Refer
to Motor Testing on page 28 or Refer to
Removing/Installing the Motor on page 67.
Replace motor/gearbox. Refer to
Removing/Installing the Motor on page 67.
Stop driving and let electronics cool.
Ohm out motors. Replace motor/gearbox if high
reading is present. Normal reading is 0-5 Ohms.
Refer to Motor Testing on page 28, Testing the
Electro-Mechanical Parking Brake on page 70 or
Removing/Installing the Motor on page 67.
Engage motor release levers. Refer to
Engaging/Disengaging Motor Release Lever on
page 69.
Check for error codes with programmer. Refer to
electronics manual.
Inflate tires.
Replace tires if worn.
Use programmer to balance motors.
If seal is bad, replace motor/gearbox. Refer to
Testing the Electro-Mechanical Parking Brake on
page 70 or Removing/Installing the Motor on
page 67.
If loose hardware is found retighten hardware.
Replace motor/gearbox. Refer to
Removing/Installing the Motor on page 67.
Tighten hardware, (use removable Loctite™on
hardware). Follow torque settings in this manual.
Replace motor/gearbox. Refer to
Removing/Installing the Motor on page 67.
Check DCL connectors. Check motor and
replace if necessary. Refer to Removing/Installing
the Motor on page 67.
®
Pronto M41