I recently had my dash out to fix a speedometer problem and since I haven't been able to find any 124 specific speedo threads I thought I would post one.

It begins at the point where you would already have the gauges out and speedometer removed with needle and faceplate off.

The pictures should run in order of dis-assembly from left to right with notes on each one. I did not bother with the tripometer fix at this time as that will be a winter project

Pic #1 - This shows the unit without the faceplate and needle (to remove the needle simply pull gently away from gauge face).
The tricky part in that this picture show is the removal of the collar holding the return spring to the needle drive shaft.
Go at this from alternating side with a flat head and pry up slowly. You DO NOT want to bend the spring here as it will affect the accuracy one the unit is re-assembled

Once this is removed simply remove the 4 screws and lift off cassette

Pic #2 - Shows the same step from a 3/4 view

Pic #3 - This is what you find with the cassette removed. Its really very simple once your this far to take apart and lubricate the noted points

Pic #4 - This was the part most in need of maintenance on my car. The 22 year old grease had the consistency of clay. The shaft had deep scoring marks where it was making metal to metal contact. Once cleaned and lubed it spins very easily

Pic #5 - Shows all the parts laid out and labeled.

Pic #6 - See next post

Attached Thumbnails

         

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