Repair Work; Replacing And Calibrating Drive Motor; Replacing The Motor - Invacare Typhoon II Service Manual

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Repair Work

7.1

Replacing and calibrating drive motor

The following two sections describe how a GB motor is replaced and a new motor is calibrated. We
recommend that you read these instructions completely through before commencing work.
Note
The course of action during disassembly is different depending on whether the vehicle is fitted
with puncture-proof tyres or standard pneumatic tyres! You can recognise puncture-proof tyres by
the fact that they do not have a valve!
• First find out whether the vehicle is fitted with puncture-proof tyres or pneumatic tyres!
7.1.1

Replacing the motor

WARNING: Danger of crushing!
The mobility device is very heavy. Injury hazard to hands and feet!
• You should seek help from a second person.
Injury hazard caused by uncontrolled movement of the mobility device!
• Switch the power supply off (ON/OFF key).
• Engage the drive.
• Before raising the vehicle, secure the wheels by blocking them with wedges.
ATTENTION: Explosion hazard!
If the wheelchair is fitted with pneumatic tyres, the wheel can explode if the air is not
released from the tyre before removing the wheel!
• Always release the air from the wheel before you remove it. Depress the small tappet in the
centre of the valve!
CAUTION!
Material damage hazard. The valve can become blocked by the puncture protection gel
and be unusable!
• During the following work you should always hold the valve up so that the puncture protection
gel cannot enter the valve.
WARNING: Injury hazard!
The wheelchair will drive in an uncontrolled manner if the GB motors are not calibrated
after being fitted new!
• Ensure that the GB motors have been calibrated after being fitted!
WARNING: Injury hazard!
If the bolts which secure the wheel are not tightened firmly enough, or if the threaded
holes in the casing are damaged by being tightened too much, the wheel can come loose
during travel!
• Always position the nuts manually in their holes when fitting the drive wheels.
• Never use electrical or pneumatic screwdrivers !
• Tighten the Allen screws with a torque of 25 Nm !
• The Nordlock washers must be fitted exactly as they were before removal !
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