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PROCEDURE 9WHEELS
REPLACING PNEUMATIC TIRES/
TUBES - DRIVE WHEELS/CASTERS
WARNING
DO NOT use your wheelchair unless it has
the proper tire pressure (p.s.i.). DO NOT over-
inflate the tires. Failure to follow these sug-
gestions may cause the tire to explode and
cause bodily harm.
If tires are pneumatic, replacement of tire
or tube MUST be performed by a qualified
technician.
NOTE: If drive wheels or casters are pneumatic, under-
inflation causes excessive wear which results in poor per-
formance of the tires.
REMOVING/INSTALLING DRIVE
WHEELS
WARNING
NEVER use a locking tab washer more
than once. ALWAYS use a NEW locking tab
washer when installing the drive wheels.
12-inch Drive Wheel (FIGURE 1)
REMOVING.
1. 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. Remove the hex screw, locking tab washer and washer
that secure the existing front wheel to the wheel hub.
3. Use a wheel puller to remove the existing front wheel
from the motor drive shaft.
FIGURE 1 - REMOVING/INSTALLING 12-
INCH DRIVE WHEELS
INSTALLING.
NOTE: The keystock in the wheel hub MUST lineup with
the cutout in the gearbox drive shaft.
1. Install new/existing front wheel onto the motor drive
shaft. Make sure the chamfered (angled in) side of the
wheel hub is pointing away from the wheelchair.
2. Install washer onto motor drive shaft.
3. Install the NEW locking tab washer onto the motor
drive shaft. Make sure the locking tab is in line with
the keyway of the front wheel.
4. Apply Loctite 242 to the hex screw.
5. Install the hex screw. Use a torque wrench only and
torque to 90-inch pounds.
This Procedure Includes the Following:
Replacing Pneumatic Tires/Tubes -
Drive Wheels/Casters
Removing/Installing Drive Wheels
Removing/Installing Drive Wheel Hub
Replacing Casters
Replacing Forks
WARNING
After ANY adjustments, repair or service and
BEFORE use, make sure all attaching hard-
ware is tightened securely - otherwise in-
jury or damage may result.
CAUTION
As with any vehicle, the wheels and tires
should be checked periodically for cracks
and wear and should be replaced.
Motor
Driveshaft
Washer
Locking Tab
Washer
Keyway
Keystock
Chamfered
Side of Wheel
Hub
Hex Screw (Apply Loctite 242 and use a Torque
Wrench only to Torque to 90-inch pounds)
TIGHTEN Hex Screw if Locking Tab is not
Parallel with Flat on Head
(STEP 9)
Flat on Head
of Hex Screw
Locking
Tab
Locking Tab Parallel
with Flat on Head of
Hex Screw
(STEP 9)
Bend Tab up tight against Flat on
Head of Hex Screw
(STEP 10)