Invacare FDX Service Manual page 106

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Use the 13 mm socket wrench to loosen the four screws (1).
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Hold the motor / gearbox unit with one hand.
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Completely remove the four screws, including the washers.
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Remove the motor / gearbox unit.
Installing the motor / gearbox unit:
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Replace the defective components.
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Before installing a new motor / gearbox unit, make sure the sealing ring (2) is correctly
mounted. The sealing ring securely attaches the motor (3) and the gearbox (5). The ring must
be installed such that the self-locking nut (4) is located on the outside.
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If the sealing ring is incorrectly installed, rotate it around as described in chapter 8.13.2.
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Install the motor / gearbox unit in reverse order.
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Check the orientation of the motor and adjust it. The motor must be installed in such a way
that the motor cable protrudes from the motor on the top, pointed slightly towards the
wheelchair. The coupling lever must be able to move to the positions "Driving" as well as
"Pushing".
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Tighten the self-locking nut (4) of the sealing ring to a torque of 4 Nm.
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Connect the motor cable plug.
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Reinstall all components that were removed beforehand in reverse order.
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