Replacing Flat Castor Tyre / Inner Tube - Invacare Storm4 Series Service Manual

6.8.8 Replacing Flat Castor Tyre / Inner Tube

• 5 mm Allen key
• Torque wrench 5 Nm — 25 Nm (or similar)
• Three joiner's clamps with plastic caps (puncture-proof tyres only)
• Two long wooden blocks (min. 14 x 14 x 30 cm)
• Repair kit for inner tube tyres or a new inner tube
• Tyre pump or compressor
• Talcum powder or tyre lubrication
There are three different types of tyres or inner tubes, and specific points must be observed for replacement of
each type. The individual types of tyres can be easily distinguished:
• Pneumatic tyres have black valve caps.
• Puncture-protected tyres have red valve caps.
• Puncture-proof tyres have no valves.
Proceed in accordance with the appropriate chapter:
• Replacing pneumatic tyres – see Installing Tyres, page 37
• Replacing puncture-protected tyres – see Installing Tyres, page 38
• Replacing puncture-proof tyres – see Installing Tyres, page 38
Replacing Pneumatic Tyres
Pneumatic tyres have black valve caps.
Removing Tyres
CAUTION!
Risk of explosion
There is considerable pressure in the tyre. Risk of injury. Parts can be thrown out and injure you if you
do not deflate all air from tyre.
– Press release pin in valve inwards and deflate all air from tyre.
1. Remove valve cap B.
2. Press release pin in valve inwards and deflate all air
from tyre.
3. Loosen and remove screws F on inside of wheel.
4. Release inner D and outer rim rings E from tyre A.
5. Remove inner tube C from tyre A.
6. Replace defective or worn parts or repair parts.
7. Remove wheel from fork.
Installing Tyres
1. Install inner tube in tyre.
If the old inner tube is to be repaired and
used again and has become wet during repair,
installation can be made easier by applying some
talcum powder to inner tube.
2. Install rim rings D and E to tyre. Make sure that
boreholes and thread for screws are exactly on top of
each other.
3. Fill some air into inner tube.
4. Install screws on inside of wheel and tighten.
5. Check exact fit of tyre on rim.
6. Inflate tyre to prescribed air pressure.
7. Re-check exact fit of tyre on the rim.
8. Screw valve cap back on.
1555830-C
Fig. 6-22 Example of Storm 4 MAX castor wheel. Valve and valve cap
B are not shown in illustration.
Service
37