Adjusting Fork Tension - Invacare CROSSFIRE T6 Owners Operating & Maintenance Manual

SECTION 8—WHEELS

Adjusting Fork Tension

NOTE: For this procedure, refer to FIGURE 8.14.
1. To properly tighten forks and guard against flutter, perform the following check on
both forks:
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).
2. If necessary, perform one of the following to adjust the fork tension:
• Standard Forks - Adjust locknut according to freedom of caster swing
(Detail "A").
• Suspension Fork (Detail "B") -
a. Refer to Removing the Elastomer on page 54 to remove the elastomer and
suspension fork bottom to access the locknut.
b. Adjust locknut according to freedom of caster swing.
c. Refer to Installing the Elastomer on page 54 to secure the suspension fork top
to the elastomer and suspension fork bottom.
3. Test wheelchair for manoeuverability.
4. If necessary, repeat STEPS 1-2 to adjust locknuts until tension is correct for both forks.
DETAIL "A" STANDARD
FORK
Fork
Locknut
Caster
Crossfire™Series Wheelchairs
DETAIL "B" SUSPENSION FORK
NOTE: Washer and
locknut shown exploded
for clarity only. DO
NOT remove.
Washer
Locknut
Elastomer
Mounting
Screws
FIGURE 8.14 Adjusting Fork Tension
50
Suspension Fork Top
Threaded Bushing
Mounting
Screws
Suspension
Fork Bottom
Caster
Part No 1148078