SECTION 9—MOTORS
Part No 1118377 85 Pronto® M71™
B. Run the motors forward for one
hour.
C. Turn motors off and allow 30
minutes for motors to cool off.
D. Run the motors in reverse for one
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. FIGURE 9.4 Replacing Internal Motor
Brushes
Electro-Mechanical Parking Brake Testing NOTE: For this procedure, refer to FIGURE9.5.
NOTE: This procedure should only be performed on wheelchairs with conventional motor/gearbox
assembly.
1. On the four-pin motor connector, locate the side by side connectors in the black
housings.
2. Set the digital multimeter to read ohms.
3. Measure the resistance between the two brake contacts. A normal reading is between
40-80 ohms depending on the motor.
NOTE: A reading of 0 ohms (Ω) or a very high reading; i.e., mohms or O.L. (Open Line) indicates
a shorted brake or an open connection respectively. If either condition exists, send the motor to
Invacare Technical Service for inspection/repair.
WARNING
A shorted electro-mechanical brake will
damage the brake output section in the
controller. DO NOT connect a shorted
electro-mechanical brake to a good
controller module. A shorted brake
MUST be replaced.
NOTE: A bad motor can damage the controller
module but a bad controller will NOT damage
a motor.
FIGURE 9.5 Electro-Mechanical Parking
Brake Testing
Motor
Housing
Motor Brush
Commutator
(Inside Motor
Housing)
Brush Caps
Brush
4 Pin Motor
Connector
To Motor