Invacare Pronto M91 Service Manual page 80

SECTION 10—MOTORS
8. If new motor brush was installed, perform the following process:
NOTE: This process, also called Brush Burn-in or Finger Printing Process, is necessary to seat
the brush to the commutator plates inside the motor for optimum performance of the motor.
NOTE: A motor with only one brush replaced will only carry a small percentage of its rated
load capacity until the new brush is burned in.
DO NOT leave the wheelchair unattended while performing this procedure - other-
wise damage to wheelchair and/or property may occur.
NOTE: This procedure must be performed with little or no load on the motor.
A. Put the wheelchair on blocks so that the drive wheels do not contact the ground.
NOTE: For steps B and D, use a rubber band to hold the driver control in the direction needed
or program the chair for latched driving. Refer to the electronics manual for latched
programming instructions.
B. Run the motors forward for one (1) hour.
C. Turn motors off and allow 30 minutes for motors to cool off.
D. Run the motors in reverse for one (1) hour.
E. When process is complete, remove wheelchair from blocks and test drive the
wheelchair.
NOTE: If wheelchair still does not perform properly, call Invacare Technical Service at 1-800-
832-4707.
Commutator
(Inside Motor Housing)
Motor Housing
FIGURE 10.3 Inspecting/Replacing Motor Brushes
® ™
Pronto M91 and M94
WARNING
Brush Caps
Motor Brush
Brush
80
Part No. 1125038