Cummins 250 Tach Drive Tip

[fuzzytoaster]

Looking for a "Drive Tip" for my M931A1 w/ Cummins 250. It appears this part was robbed (along with other things I've now replaced) so my Tach doesn't work.

 

[doghead]

You should be able to pull the sensor off the cable and re-install it directly into the IP.

The sensor is only needed if you have the ICE/STE.

 

[patracy]

Yup, it'll work without the sender.

 

[fuzzytoaster]

I did the searching and did exactly that but no luck getting the tach to work. I'll play with it more tomorrow in the day light but this truck was picked over for odd parts.

 

[Jeepsinker]

Take the cable off the back of the tach and see if it spins with the engine running. It may be a bad tach. If the tach is ok I can probably get you what you need off a truck that I have here destined for a Chinese crucible.

 

[fuzzytoaster]

I've pulled the tach and replaced the cable with one from Porkchop, both are new and working correctly. I was back tracking the issue and found the next problem part being that drive tip. Knowing the sensor isnt needed I dug up some old threads on here to see if it was possible to remove the pulse sensor from the equation which is true. The problem is in doing so has not solved my issue as looking down into the adapter fitting is void, I don't see anything in reach that would connect to the inside of the tach cable. I will look tomorrow with more day light, the black paint doesn't help. With the tach cable attached directly it still does not work.

 

[fuzzytoaster]

Found the issue as I suspected..and hope it wasn't. There were no parts or fragments present so this had to have been a known issue before DRMO turn in. Any ideas on repairing this? The broken "sleeve" can't be pulled directly out.

Mods: Please move thread to 5 ton discussion.

 

[patracy]

Moved to 5 ton section.

You're not going to like this, but I'm afraid you're going to need to remove the PT pump and take it to a shop to have it repaired. That shaft/seal requires the pump to be torn down to repair/replace.

 

[fuzzytoaster]

Moved to 5 ton section.

You're not going to like this, but I'm afraid you're going to need to remove the PT pump and take it to a shop to have it repaired. That shaft/seal requires the pump to be torn down to repair/replace.

That's what I had figured. Nothing like a fresh RRAD truck.

 

[ke5eua]

Fuzzy, still got that pulse sender? I am in need of two for my electric upgrades to the 818.

 

[fuzzytoaster]

Fuzzy, still got that pulse sender? I am in need of two for my electric upgrades to the 818.

Nay, the truck has since moved on from my possession.

 

[ke5eua]

Rats

 

[WillWagner]

Moved to 5 ton section.

You're not going to like this, but I'm afraid you're going to need to remove the PT pump and take it to a shop to have it repaired. That shaft/seal requires the pump to be torn down to repair/replace.

Nope, the pump needs to come off, but not disassembled. the drive can be pushed out of the front cover by removing the drive coupling and lightly tap the drive gear/shaft out. Let me look around, there might be a set of tac drive parts in my box here or at work. There is a tool to remove the assembly without removing the pump, but it grabs the driveshaft, I think what is left of yours isn't enough for the jaws to grip. Leme look for that too.

 

[ke5eua]

Nope, the pump needs to come off, but not disassembled. the drive can be pushed out of the front cover by removing the drive coupling and lightly tap the drive gear/shaft out. Let me look around, there might be a set of tac drive parts in my box here or at work. There is a tool to remove the assembly without removing the pump, but it grabs the driveshaft, I think what is left of yours isn't enough for the jaws to grip. Leme look for that too.

Don't worry, truck has been passed on.