Mercedes 129 & 140 Odometer Repair

Once the speedometer is removed from the cluster.

 

Carefully raise the tip of the needle over top of the needle stop. Mark were the needle points and this is where you will need to line the needle back to after the repair is completed.

140 Speedomter Needle

 

Grip the needle at the center pivot point and rotate counter clockwise, you will feel some resistance as you turn the needle. DO NOT PRY UP OR PULL UP ON THE NEEDLE! This is normal as you are using the internal stop to help remove the needle. As you rotate the needle, it will loosen and then come off with a slight up pull.

140 Speedomter Needle

 

Next, start to peel the face plate off.

140 Speedometer Label

 

Once face plate is mostly removed you will need to remove the needle stop. Place your fingers behind the numbered face plate around the needle stop. Apply upward pressure with one hand and you use the other hand to twist and pull out the stop.

140 Speedomter Needle Stop

 

Once the stop is removed you can remove the face plate. Use a small standard screw driver and remove the two screws that hold the face plate housing to the motor housing.

140 Speedomter

 

With the motor housing in hand, remove the two screws that secures the motor. You will see the broken gears.

140 Speedomter Gears

 

Remove old gears. Use shop air pressure to throughly blow out the odometer assembly to remove all old broken pieces (Even if you see and remove the old broken pieces by hand make sure that you still blow the unit out with shop air). You can not use too much air or air pressure. Wipe grease from gear area, off motor and motor shaft. Install the new gears into the odometer unit. The new gears do not require any lubricant. Then place the motor back on the unit. Wiggle the 10/ths number dial to make sure the gears haven't locked up on each other.

140 Speedomter Gears

Reverse order of step to reassemble.

To reinstall the needle: place the needle on the motor shaft at the point where you marked when starting. Use both thumbs, press the needle straight down evenly at the pivot point. If you are not centered on your mark use the internal stop to help adjust. If you are too high rotate counter clockwise against the internal stop in small increments until aligned. If you are too low rotate clockwise following the same procedure as above.

If you need any clarification please contact us at sales@odometergears.com or 757-593-3478 or 757-771-6694