Motor Testing; Motor Brush Inspection - Invacare POWER 9000 Owner's Operator And Maintenance Manual

7. Number of floating balls indicates charge.
NUMBER OF FLOATING BALLS
0
1
2
3
4
* 5
* Check charging system.
8. Flush the liquid back into the same cell after read-
ing the float. Repeat this step until all cells have
been properly read. A shorted or dead cell can
be detected when it is the only cell that doesn't
charge.
FIGURE 2 - USING A HYDROMETER
9. Flush the hydrometer in cold running water by
allowing the water to rise into the hydrometer as
far as possible. Do this several times to guard
against burn damage.
10. Replace the battery caps.
11. Reinstall battery boxes.
Discharged
25% Charged
50% Charged
75% Charged
100% Charged
Overcharged
MOTOR TESTING (FIGURE 3)
1. On the 4-pin motor connector, locate the two (2)
contacts in the red and black housings.
2. Set the digital multimeter to measure ohms.
3. Measure the resistance between the two (2)
motor contacts.
NOTE: A normal reading is between 1 and 5
ohms. A reading of 0 ohms or in excess of 15
ohms indicates a problem. High readings are
generally caused by bad connections and/or
damaged brushes.
FIGURE 3 - MOTOR TESTING
MOTOR BRUSH INSPECTION (FIGURE 4)
There are two (2) contact brushes on ACTION
POWER 9000 motors located under the brush caps
on the motor housing. If these caps are hard to re-
move they are either overtighened or the motor has
gotten very hot. If caps cannot be removed, it is rec-
ommended that the motor be sent to Action by In-
vacare Technical Services for inspection/repair.
NOTE: It is very important to note which way
the brush comes out of the motor. It MUST be
placed into the motor exactly the same way to
ensure good contact with the commutator.
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