Replacing And Calibrating A Gb Drive Motor; Replacing The Motor - Invacare Typhoon Service Manual

7.2

Replacing and calibrating a GB drive motor

The next two sections describe how to replace a GB motor, and then calibrate the new one. We
recommend reading through the instructions once before beginning work.
NOTE – First check whether the vehicle is equipped with puncture-proof tyres or
pneumatic tyres!
Depending on whether the vehicle is equipped with puncture-proof tyres or pneumatic tyres, the
process of disassembly and re-assembly will be different! You can recognise puncture-proof tyres
by the fact that they do not have a valve!
7.2.1

Replacing the motor

CAUTION! Danger of the wheelchair tipping over or rolling away!
• Secure the wheelchair from tipping over by propping it up with a wooden block under the
battery box that is long and wide enough! Using a wooden block that is too short or too high
could cause the wheelchair to tip over!
• Switch the wheelchair off at the remote!
EXPLOSION HAZARD!
On a vehicle with pneumatic tyres, the wheel will explode if you do not let the air out of the
tyre before removing the wheel!
• Always let the air out of the tyre before removing it (press in the pin in the middle of the valve)!
Injury hazard! The wheelchair will drive erratically if the GB Motors are not calibrated after
being replaced!
• Make sure to calibrate the GB Motors after replacing them!
Injury hazard! If the bolts that hold the wheel have been insufficiently tightened, or if the
threaded holes in the rim have been damaged during assembly by excessive tightening,
then the wheel can loosen when driving!
• When reassembling the drive wheels, position the screws in their holes by hand!
• Do not use electrical or pneumatic screwdrivers!
• Tighten the Allen screws at a torque of 25 Nm!
• Make sure the Nordlock washers are replaced exactly the way they were removed!
NOTE CONCERNING WARRANTY ON GB-MOTORS:
If within such warranty period motors are proven to be defective, the motors will be repaired or
replaced at Invacare's absolute discretion. This warranty does not include labour or shipping
charges. Neither does the warranty apply to physical damage nor unauthorised repairs.
Invacare's sole obligation and your exclusive remedy under this warranty is limited to such repair
and/or replacement.
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