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SECTION 5—REAR WHEELS/FRONT CASTORS
Adjusting Fork Rotation
W A R N I N G
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 5.3.
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 damaging 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.
NOTE: When a solid caster is fitted, an additional
washer is present inside the caster tube between
the bearing and the long spacer.
Fork
FIGURE 5.3 Adjusting Fork Rotation
Vertical Axle
Caster
Head Tube
Specific
Bearing
Dust Cover
Locknut
Additional
Washer for
Solid
Long Spacer
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