21
This Procedure Includes the Following:
Installing/Replacing Six or Eight-inch Front
Casters and Forks
Adjusting Front Forks
Replacing/Repairing Front Caster Tire/Tube
Replacing Front Casters
WARNING
After ANY adjustments, repair or service and BEFORE
use, make sure all attaching hardware is tightened
securely - otherwise injury or damage may result.
INSTALLING/REPLACING SIX OR
EIGHT-INCH FRONT CASTERS AND
FORKS (FIGURE 1)
1. Remove the caster from the fork. Refer to REPLAC-
ING FRONT CASTERS in this section of the manual.
2. Remove the dust cover.
3. Remove the locknut and nylon washer that secure
the fork to the caster headtube.
4. Drop the fork out of the caster headtube.
5. Slide the new fork into the caster headtube and re-
assemble by reversing STEPS 1-4.
6. Adjust the forks. Refer to ADJUSTING FORKS in
this section of the manual.
7. Repeat STEPS 1-6 for opposite fork, if necessary.
ADJUSTING FORKS (FIGURE 1)
1. Remove the dust cover.
2. To properly tighten caster journal system and guard
against flutter, perform the following check:
FIGURE 1 - INSTALLING/REPLACING SIX OR
EIGHT-INCH FRONT CASTERS AND FORKS
F
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T
C
A
S
T
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R
S
PROCEDURE 5
FRONT CASTERS
Washer
8-inch Fork
Hex
Screw
Locknut
Front Caster
Washer
FIGURE 2 - REPLACING FRONT CASTERS
a. Tip back the wheelchair to floor.
b. Pivot both forks and casters to top of their arc
simultaneously.
c. Let casters drop to bottom of arc (wheels should
swing once to one-side, then immediately rest in
a straight downward position).
d. Adjust locknuts according to freedom of caster
swing.
3. Test wheelchair for maneuverability.
4. Readjust locknuts if necessary, and repeat STEPS
2-3 until correct.
5. Snap dust cover over the locknut and stem.
REPLACING/REPAIRING FRONT
CASTER TIRE/TUBE
WARNING
Replacement of front caster tire or tube MUST
be performed by an authorized Invacare
dealer or qualified technician.
CAUTION
As with any vehicle, the wheels and tires should
be checked periodically for cracks and wear,
and should be replaced.
REPLACING FRONT CASTERS
(FIGURE 2)
1. Remove the hex screw, washers and locknut that
secure the front caster to the fork.
NOTE: Washers are used on TRACER IV wheelchairs only.
2. Install the new front caster onto the wheelchair by
reversing STEP 1.
3. Repeat STEPS 1-2 for the opposite front caster if
necessary.
Front Caster
and Fork
Dust Cover
Caster
Headtube
Locknut
Nylon
Washer
