Invacare Lightweight - Manual (Page 50)

SECTION 8—FRONT CASTERS
Lightweight, Standard and Heavy Duty Wheelchairs 50 Part No. 1114811
Adjusting Forks
1. To properly tighten caster journal system and guard against flutter, perform the
following check:
A. Tip back of wheelchair to floor.
B. Simultaneously pivot both forks and casters to the top of their arc.
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.
E. Repeat STEPS C-D until wheels swing once to one-side, then immediately rest in a
downward position.
2. Test wheelchair for maneuverability.
3. Readjust locknuts if necessary, and repeat STEPS 1-2 until correct.
4. Snap dust cover over the locknut and stem.
Replacing Front Casters
NOTE: For this procedure, refer to FIGURE 8.2.
ƽ WARNING
If replacement casters are not installed in the original mounting position of the fork
assembly, the seat-to-floor height and stability of the wheelchair will be affected. A
qualified technician MUST perform these adjustments.
Make sure both front casters are the same size and are installed into the same
respective mounting hole before using the wheelchair, otherwise injury may occur.
NOTE: Note the mounting position on the fork assembly for proper reinstallation of the new front
caster.
1. Remove the hex screw, washers and locknut that secure the front caster to the fork.
NOTE: Washers are used only with 8-inch casters with precision bearings.
2. To reinstall the new front caster onto the fork, reverse STEP 1.