Invacare A-4 User Manual page 33

6. Periodically adjust wheel locks in correlation to tire wear. Refer to Replacing/Adjusting the Wheel Locks on page 59.
 Tire wear is excessive if:
• Pneumatic Tires - there is missing tread or the tires are bald.
• Urethane Tires - there are cuts, surface defects or the tires are loose on the rims.
• Rubber Tires - 30% or more of the tire has worn away.
Invacare recommends that rear wheel tire/tube and caster tire/tube be replaced every five years.
7. Regularly check for loose spokes in the rear wheels. If loose, have them adjusted. Contact a qualified technician or Invacare customer support
at the telephone numbers on the back of this manual.
8. Periodically check handrims to ensure they are secured to the rear wheels. Refer to Handrim Replacement on page 67.
9. Periodically check caster wheel bearings to make sure they are clean and free from moisture. Use a Teflon
10. Check upholstery for sagging, rips or tears.
11. Clean upholstery with mild soap and water.
Replacing/Repairing Rear Wheel Tire/Tube
WARNING
Replacement of solid urethane tires is not recommended. If the solid urethane tire needs repaired, Invacare recommends
replacing the complete wheel assembly.
Replacement of rear wheel tube must be performed by a qualified technician.
Replacing/Repairing Caster Tire/Tube
WARNING
Replacement of solid urethane or semi-pneumatic tires is not recommended. If the solid urethane or semi-pneumatic tires
need replaced, Invacare recommends replacing complete caster assembly.
For pneumatic tires, replacement of the tube must be performed by a qualified technician.
Part No 1110545
33
5 SAFETY INSPECTION
®
lubricant if necessary.
Invacare® A-4® Wheelchair