33
Section 14
Puncture Repair.
Replacing Inner Tube on Mid Drive Wheel
Raise wheelchair 25mm to 50mm from the ground so the wheel can be removed. Using
a 13mm socket spanner, remove Nyloc Nut and retainer washer from centre of wheel as
per Fig 1 below and remove wheel from the wheelchair.
Fig 1
Using a 3/16
th
socket key, undo all 8 bolts as per Fig 2 below. Before undoing Hex
screws, ensure tyre is deflated. When all screws have been removed, remove rim half
away from the wheel Fig 3. The inner tube will now be exposed for re-fitment of new
inner tube. Slightly inflate the tube and insert into tyre.
To re-assemble, replace tyre on the front side of the rim and line valve up with
indentation on rim as arrowed in Fig 3. Make sure the tyre is seated correctly and then
insert back half of rim on the wheel as per Fig 2. Again make sure the indentation on the
back rim lines up with the valve. You can now gradually re-tighten all 8 screws. All
screws need to have a thread locking compound (Loctite 277™) or equivalent.
Do not tighten each screw in one operation. Instead, gradually tighten opposing screws
evenly as you go. When all screws are tight you can inflate tyre to the correct pressure.
Fig. 2 Fig. 3
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