Repair Instructions; Replacing The Motor - Pfaff Coverlock 4772 Service Manual

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Repair instructions

38. Replacing the motor

Disassembly:
G Remove the housing as described in the adjustment and repair instructions.
G Using a small screwdriver, remove the cover 1 to the handwheel (figure 1).
G Unscrew the fastening screw 2 and remove the washer 3.
G Remove the handwheel.
G Unscrew the fastening screw 4 (figure 2).
G Remove the toothed belt.
G Unscrew the fastening screw 5 (figure 3).
G Remove the clamping plate 6 to the cable.
G Cut open cable clip 7 (figure 4).
G Pull the insulation tube 8 to one side.
G Pull out the plug-in connector cable to the lamp and remove the motor completely.
Assembly:
G Before installing the motor carry out a visual check of the wiring of the motor.
G Carry out a functional test of the motor using the foot control, thus pressing the microswitch (close).
G Plug the plug-in connector of the new motor into the lamp.
G Pull insulation tube 8 over the plug-in connector and secure it with the new cable clip 7 (figure 4).
G Position the lamp and motor cable in the cable duct.
G Fit the cable into the clamping plate 6 and secure it with the fastening screw 5 (figure 3).
G Position the motor in the machine housing and slightly tighten the fastening screw 4 (figure 2).
G Mount the handwheel.
G Fit the washer 3 and the fastening screw 2 (figure 1).
G Tighten the fastening screw 2 and mount the cover 1.
G Loosen the fastening screw 6, mount the toothed belt and set the tension of the toothed belt
by operating the motor.
Note:
After replacing the motor, an electrical safety test must be carried out as described in the adjust-
ment and repair instructions.
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