GROOVE
21
EE
NN
GG
LL
IISS
HH
0705/1/ST-000690620.EMS
12.10. Drive Wheel Tyre Repair
Remove the plastic hub cap by levering it off (
Fig. 77
). To remove
the wheel, use a 5.0mm hex key on the 4-button head studs. The
button head studs protrude through to the back of the wheel. Undo
the corresponding nylok nuts using a 13mm spanner (
Fig. 78
).
Remove the wheel. Note that when replacing the wheel use new
nylok nuts.
There are 5 rim studs that must be loosened/tightened in the num-
ber order shown. Use a 6mm Allen key to release the studs. Lift the
inner rim off the tyre wall (
Fig. 79 and 80
).
Lift the tyre and tube off the outer rim. Gently get a hold of the
inner tube just behind the valve.
Carefully feed the tube out of the tyre.
When refitting, place the tube inside the tyre & rest it on the outer
rim with the valve stem aligned with the cut out in the rim. Face the
valve stem outward. Place the inner rim over the tyre, tube & outer
rim. Align the cut out to fit over the valve stem & match it up to the
cut out in the outer rim. Make sure the stud mounts are in line on
both rims. Tighten the studs in the sequence shown earlier taking
care not to pinch the tube. Slowly inflate to the pressure marked on
the tyre. Refit the wheel back onto the motor shaft and fix it safely
with the 4-button head studs.
In case a solid tyre is used the wheel needs to be replaced as a
complete assembly.
12.11. Removing the Castor Wheel
Note which one of the two holes is used to mount the castor
wheel. Ensure that both castors use the same mount position.
Depending on the castor wheel type use two 6.0mm hex keys or
two 13mm spanners to undo the axle bolt.
Remove the nyloc nut in case of the Hex bolt type. Always use a
new nyloc nut when refitting.
There is an enclosed spacer between the wheel bearings. When
refitting do not try to force the bolt through. Gently move the wheel
back and forth until the bolt slips through.
Withdraw the axle bolt. Remove the castor wheel.
The Groove R/F tyre can be removed and repaired/exchanged by
following the rim split procedure for the drive wheel in section
12.10.
12.12. Recommended maintenance routines
Daily Checks:
With the control system switched off, check that the joystick is not
bent or damaged and that it returns to the centre when you push
and release it. If there is a problem do not continue with the safety
checks and contact your service agent.
Weekly checks:
Parking brake:
This test should be carried out on a level floor with at least one
meter clearance around the chair.
Switch on the control system.
Check that the battery gauge remains on, or flashes slowly, after
one second.
Push the joystick slowly forwards until you hear the parking brakes
operate. The chair may start to move.
Immediately release the joystick. You must be able to hear each
parking brake operate within a few seconds.
Repeat the test a further 3 times, pushing the joystick slowly back-
wards, left and right.
Connectors:
Make sure that all connectors are securely mated.
Cables:
Check the condition of all cables and connectors for damage.
Joystick gaiter:
Check the thin rubber gaiter or boot around the base of the joy-
stick shaft for damage or splitting. Check visually only, do not
handle the gaiter.
Mounting:
Make sure that all components of the control system are securely
mounted. Do not over-tighten any securing screws.
12.13. WARNING
Please refer to Service manual for any information about Tor-
ques.
Fig. 77
Fig. 78
Fig. 79
Fig. 80
