Checks And Repair Work At Motor, Gears, Servo And Steering; Driving Motor And Gears - Invacare G40 Service Manual

9.0 Checks and repair work at motor, gear, servo and steering
9.1 Driving motor and gear
1 Chassis
2 Driving motor 450W
3 Stopper with carbon brush
4 Disengaging lever
5 Gear, compl.
6 Thread rod with
square hinge
7 Shock absorber
8 Mounting
9 Hexagon head screw.
M5x20
10 Gear rocker arm
11 Hexagon head screw
M8x35
12 Rubber support
13 Socket 12x1,8; 8x18
14 Disc 8,4
15 Nut M8
16 Brake caliper
NOTE:
• Motor and gear are maintenance-free. Only basical
checks can be done
• The driving unit can only be replaced completely.
Check
• Motor vibrates, has operation sounds?
• Motor does not start?
• Elektric brake does not apply?
• Gear has operation sounds or blocks?
Check circuit of motor
• Bring seat system in service position and arrest.
• Take off both motor plugs from main module.
• Engage motor (driving mode).
• Check with multimeter (measuring range Ohm) as shown in diagram.
It must show circuit.
• Disengage motor (freewheel operation ) and repeat measurement.
The measured value should ascend to infinite when driving operation is
changed into freewheel operation.
Check electric brake
• Check with multimeter (measuring range Ohm) as shown in diagram.
The measured value should lie between 20 and 200 Ohm.
Check carbon brush
• Remove the four closure caps (3) and take out carbon brushes.
• Measure length of brushes. The original length lies at 13mm. The
abrasion limit is 11mm.
• Check working surface visually. The working surface must not show any
grooves.
26
4
7
1
16
8, 9
Action
> Check or replace motor.
> Check or replace motor.
> Check or replace brake.
> Replace driving unit.
Driving motor
3
2
6
3
10, 11, 12,
13, 14, 15
7
Check circuit of motor
Check electric brake
Check carbon brush
Length
Working surface
5
min. 11 mm