Invacare Lightweight Aluminum Wheelchair - Manual (Page 18)

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This Procedure Includes the Following:
Replacing Front Casters
Installing/Replacing Forks
Caster Headtube Mounting Adjustments
WA R N I N G
After making adjustments, always
make sure that parts are properly tight-
ened BEFORE using the wheelchair.
F
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PROCEDURE 5 FRONT CASTERS
INSTALLING/REPLACING FORKS
(FIGURE 2)
1. Remove the existing front caster from the fork.
2. Remove the black dust cover.
3. Remove locknut and large plastic washer.
4. Drop the fork out of the caster headtube.
5. Slide in the new fork.
6. Reassemble, except black dust cover by revers-
ing STEPS 1-5.
7. Repeat STEPS 1-6 for the opposite front caster,
if necessary.
8. To properly tighten fork stems and guard against
flutter, perform the following check:
a. Tip back of 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.
9. Test wheelchair for maneuverability.
10. Readjust locknuts if necessary and repeat STEPS
8-9 until correct.
11. Snap dust caps over the locknut and stem.
Locknut
Washer
Hex Screw
Fork
Front
Caster
FIGURE 1 - REPLACING FRONT CASTERS
Spacer
Washer
Front Caster
and Fork
Caster Headtube
Dust Cover
Locknut
Large Plastic
Washer
FIGURE 2 - INSTALLING/REPLACING
FORKS
REPLACING FRONT CASTERS
(FIGURE 1)
1. Remove the hex screw and locknut that secure
the existing front caster to the fork.
2. Install the new front caster onto the fork.
3. Reinstall the spacer and washers and securely
tighten the new front caster with the existing hex
screw and locknut.
WA R N I N G
Make sure both front casters are posi-
tioned in the same mounting hole BE-
FORE using the wheelchair; otherwise
injury can occur.
4. Repeat STEPS 1-3 for the opposite front caster
if necessary.