11 REAR WHEELS/FRONT CASTERS
85
11.4 Adjusting Forks
1.
Remove the dust cover from the caster headtube.
2.
To properly tighten caster journal system and guard against flutter,
perform the following check:
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.
D. Adjust locknuts according to freedom of caster swing.
3.
Repeat STEPS C-D until the wheels swing once to one-side, then
immediately rest in a straight downward position.
4.
Test wheelchair for maneuverability.
5.
Snap dust cover into the caster headtube.
FIGURE
11.5 Removing/Installing the Caster Assemblies
The sector block may need to be removed in
order to remove the dust cover. Refer to
Adjusting Forks on page 85.
Dust cover
Locknut
Caster Headtube
Fork
Caster
Washer
If replacing a front caster note the mounting position of the existing front caster for installation of the new front caster.
If repositioning front casters or replacing the existing front caster with a caster of a different size, refer to "Changing the
front seat to floor height" in the service manual to determine the front caster position needed for the required front
seat-to-floor height.
Both front casters MUST be the same size and adjusted to the same height.