Adjusting Forks - Invacare Action3 Junior Service Manual

Adjusting Forks

Caster angle vertical axis MUST be at 90° +/- 1° from the ground, if not a
flattering risk may occur. Both caster assemblies should be at the same angle.
After ANY adjustments, before use, make sure all attaching hardware
is tightened securely - otherwise injury or damage may occur.
NOTE: For this procedure, refer to FIGURE 5.8.
1. Remove the dust cover from the caster head tube.
2. To properly tighten castor journal system and guard
against flutter, perform the following check:
A. Tip back the wheelchair to floor.
B. Pivot caster fork assemblies in rear position
C. Push caster to initiate clockwise movement
D. Let caster fork assembly rotate freely,
if not change the upper specific bearing.
3. Adjust locknuts to appropriate torque (15/20 Nm)
with a 19 mm socket wrench; do not over tight the
locknut, you may risk to damage the bearings.
4. Test wheelchair for manoeuvrability.
5. Snap dust cover into the caster head tube.
6. Perform STEPS 1 to 5 on the other side.
SECTION 5—REAR WHEELS/FRONT CASTORS
W A R N I N G
Locknut
Specific
Bearing
Caster
Head tube
3 1
Dust
cover
FIGURE 5.8
Adjusting Fork
Finish position
Fork
Vertical Axle