Replacing Forks - Invacare A4 Owner's Manual

iii. Reinstall the bolt and locknut through the fork, front caster and two spacers.
Both front casters MUST be positioned to the same corresponding mounting hole, otherwise
injury or damage may occur.
4. Repeat STEPS 1‐3 for the opposite caster if necessary.
NOTE: If replacing front casters with a different size than what was originally on the wheelchair, the front caster height MUST be
adjusted to keep the wheelchair frame parallel to the floor. Refer to Adjusting Caster Height on page 42. The size of the rear wheels may
also need adjustment. Refer to Repairing/Replacing Rear Wheel Tire/Tube on page 39.
Fork
Bolt
Axle Spacer
NOTE: Only non‐suspension short fork style shown for
clarity. All fork styles install in the same way.

Replacing Forks

NOTE: For this procedure, refer to FIGURE 6.9.
1. Remove front casters from wheelchair. Refer to
Replacing/Adjusting Casters on page 40.
2. Remove the headtube cap.
3. Remove the locknut and washer(s)/spacer(s).
NOTE: There may be up to four washers/spacers on the fork stem
above and/or below the headtube. Note the number and position of
these washers for reinstallation.
4. Drop the fork out of the caster headtube.
5. Slide the new fork into the caster headtube.
NOTE: Check bearing assemblies and replace if necessary
6. Ensure that fork slides completely into caster headtube.
7. Install washer(s)/spacer(s) and secure with locknut.
Improper positioning of the washer will prohibit the free movement of the fork.
8. Reinstall existing/install new front casters onto the wheelchair. Refer to Replacing/Adjusting Casters on page 40.
Part No 1110545
WARNING
Locknut
Axle Spacer
Caster
FIGURE 6.8 Replacing/Adjusting Casters
WARNING
41
DETAIL "A" - LONG FORK MOUNTING POSITION
Non Suspension
Top
Middle
Bottom
Locknut
Nylon Washer
Spacer
FIGURE 6.9 Replacing Forks
SECTION 6—WHEELS
Suspension
Top
Middle
Bottom
Head Tube Cap
Caster Head Tube
Fork
A4 Owner's Manual