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6. Examine the head of the hex screw and the locking tab
washer. Make sure one (1) of the tabs on the locking
tab washer is parallel with one (1) of the flats on the
head of the hex screw.
7. If one (1) of the tabs on the locking tab washer is NOT
parallel with one (1) of the flats on the head of the hex
screw (FIGURE 1), TIGHTEN the hex screw until the
closest flat and locking tab are parallel.
NOTE: Tighten hex screw only. DO NOT loosen hex screw
to make one of the tabs on the locking washer parallel.
8. Bend the parallel tab of locking tab washer up tight
against flat of the hex screw (FIGURE 1).
14-inch Drive Wheel (FIGURE 2)
REMOVING.
1. Remove the battery boxes. Refer to I
NSTALLING/
REMOVING BATTERY BOXES for one (1) of the
following:
FWD WHEELCHAIRS - in PROCEDURE 13 of this
manual.
MWD WHEELCHAIRS - in PROCEDURE 14 of this
manual.
2. Remove the four (4) beveled locknuts that secure
the drive wheel to the wheel hub.
3. Remove the existing drive wheel from the wheel hub.
Four (4) Beveled
Hex Nuts
Drive Wheel Assembly
Wheel Hub
Assembly
FIGURE 2 - REMOVING/INSTALLING 14-
INCH DRIVE WHEELS
INSTALLING.
1. Install drive wheel onto wheel hub
2. Secure the drive wheel onto the drive wheel hub with the
existing four (4) beveled locknuts. Torque locknuts to 160-
inch pounds.
3. Repeat STEPS 1-2 for opposite side if necessary.
4. Install the battery boxes. Refer to I
NSTALLING/REMOV-
ING BATTERY BOXES for one (1) of the following:
FWD WHEELCHAIRS - in PROCEDURE 13 of this
manual.
MWD WHEELCHAIRS - in PROCEDURE 14 of this
manual.
REMOVING/INSTALLING DRIVE
WHEEL HUB (FIGURE 3)
NOTE: Drive wheel hubs are only on 14-inch drive wheels.
WARNING
NEVER use a locking tab washer more than
once. ALWAYS use a NEW locking tab washer
when installing the drive wheels.
Removing
1. Remove the drive wheels. Refer to
REMOVING/IN-
STALLING THE DRIVE WHEELS in this procedure of
the manual.
NOTE: The tab of the locking washer that is bent 90
o
up
against the head of the mounting screw MUST be flattened
before the mounting screw can be removed.
2. Flatten the tab of the locking washer that is bent 90
o
up
against the head of the mounting screw.
3. Remove the mounting screw, locking tab washer and
washer that secure the existing drive wheel to the wheel
hub.
4. Remove the wheel hub and keystock from drive shaft.
Installing
1. Position the keystock on the drive shaft
CAUTION
DO NOT apply more than a one (1)-inch (in
length) thin film of anti-seize compound to
the drive shaft. Applying more than one
(1)-inch (in length) can cause the anti-seize
compound to leak resulting in damage to
flooring (carpet, tile, etc.).
PROCEDURE 9 WHEELS
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