QM-7 SERIES SERVICE MANUAL
PAGE 6.1
JANUARY 2012SUNRISE MEDICAL
Note: This procedure may be done with or
without removing the motor from the power
chair. If the motor/gearbox is to be removed
from the power chair, refer to Motor and Gearbox
Removal, Section 7 of this manual. Consider
replacing any motor/gearbox assembly that
does not pass the following inspections.
1. Inspect the output shafts for signs of grease
leakage (fi gure. 6.1.1).
2. Inspect the the gearbox release arm to the
motor/gearbox assembly. Ensure that it is tight
and not damaged (fi gure. 6.1.2).
Motor/Gearbox Inspection
Section 6
fig. 6.1.1
fig. 6.1.4
5. Remove the brush by using a common
screwdriver to unscrew the plastic cap. Be careful
not strip out the slot (fi gure. 6.1.4).
Caution: Use care not to damage the brush
cap with excessive force in the next step.
4. Locate the motor brush access on both sides
of the motor (fi gure 6.1.3)
fig. 6.1.2
fig. 6.1.3
Note: When removing the brush assemblies, remove one brush assembly at a time. Note its
orientation so that it can be inserted into the brush holder the same way it was removed.
3. Manually operate each gearbox release lever
to ensure that they operate easily and fully engage
and/or disengage
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