Remove the handle, interior light wiring and door card. Try not to turn the handle mechanism so that it will still line up correctly when reassembling.
Remove the 4 bolts, spring washers and flat washers holding the mechanism to the door.
Push the mechanism into the door and push the assembly to the rear of the door and disengage the white roller "A" from the rear of the channel attached to the inner door.
Push the assembly to the front of the door disengaging the rear black roller "B" from the front of the rear channel attached at the bottom of the glass then the front black roller "C" from the front of the front channel.
Close the moving arm of the assembly so that moving arm and main assembly are lined up to ease removal from the door.
Remove the assembly from the lower door aperture by tilting the top of the handle end (the bit with teeth) away from you and remove from the door, bottom of the handle end first.
Lower the handle end and at the same time raise the moving arm in a sort of scissor action so that the black roller on the moving arm "C" and the black roller on the end of the main assembly "B" move toward each other. Using this scissor action locate the front black roller (the black roller "C" on the moving arm) on the front of the front channel of the glass.
Carefully slide the front black roller toward the rear of the door so that you can engage the rear black roller (the black roller "B" on the narrow end of the main assembly) on the front of the rear channel of the glass. You have to do this bit by feel as vision is limited.Carefully continue to slide both black rollers, that are now engaged in their respective channels, toward the rear of the door and at the same time raise the handle end of the winding assembly.
Slide the assembly so that the white roller "A" can be engaged on the rear of the channel attached to the inside of the door. You may need another pair of hands to lower the door glass at this point but I managed it with the glass clamped at the top of the door.
Slide the whole assembly toward the front of the door and pull the handle assembly through the winder hole and hopefully the 4 bolt holes will line up with the holes in the door. If they are a bit off, put the winder handle on the shaft and adjust the positioning.
Replace the 4 bolts, spring washers and flat washers.
Refit the interior light wiring, the door card and the winder handle.Mike
(Ed note: If replacing the winding mechanism, the new one's winder position should be adjusted to match the original one before fitting.
If the teeth on the quadrant look pointed and worn, replacement is recommended.
Ensure that all the moving parts are well greased).