Speedometer issue

[Cybul]

Hi.
I have a problem with the speedometer on my m1152a1.

What I have tested:
1. I unscrewed the tachometer generator (#12480922)
The plates were bent so I squeezed them.

2. I put the pin (Sender Tachometer Generator?) to the drill


3. The moment I switched on the drill, the pin started to rotate in the generator and the speedometer works.

It follows that the cable, speedometer and tachometer generator is ok.

However, the speedometer does not work when driving.
The sender most likely does not rotate, which means there is probably something faulty in the transfer case, maybe the socket that the sender goes into?
Any suggestions?

 

[Mogman]

It is most likely the plastic gears in the TC, or the gear is simply not clocked correctly.

 

[Cybul]

It is most likely the plastic gears in the TC, or the gear is simply not clocked correctly.

So the only option is to disassemble the TC?

 

[Mogman]

So the only option is to disassemble the TC?

No, you can start in TM 9-2320-280-20-2, 5-24. SPEEDOMETER DRIVEN GEAR MAINTENANCE and inspect if the gears are OK and if the gear is timed correctly.

 

[Cybul]

No, you can start in TM 9-2320-280-20-2, 5-24. SPEEDOMETER DRIVEN GEAR MAINTENANCE and inspect if the gears are OK and if the gear is timed correctly.

This instruction is for the old type with line. My is electronic.
And in TM-9-2320-387-24-1 I have found:
5-17. SPEEDOMETER DRIVEN GEAR REPLACEMENT


Will check what is inside. Thx.

 

[Mogman]

Same information, all they did was replace the cable with a sending unit.

 

[Cybul]

Here is a reason:


I have found a new item in the shops but there is a considerable price disparity, from 15usd (hummerh1parts) to 65usd (ebay) (macmotors ~34usd). What is the reason for this? Is there any chance that the cheapest ones are not original?