NHC250 AFC Pump Tachometer Drive Oil Leak

[mgman]

I have an oil leak on my M925 with the NHC250 engine. Oil is coming up and leaking out of the tach pulse sender. I see in the 24P-1 parts book that the shaft drive seal is P/N 212603. My question is can this be changed without pulling the pump off. I am concerned about the drive gear falling out of location when the shaft is pulled out.

Edited title.

 

[mgman]

Found the answer. Disregard the question.

 

[simp5782]

You can get it out with a good pick. Its not too difficult with it still on the truck. Putting it back in is the fun part. You need a shaft sleeve like below to drive it back in

 

[WillWagner]

There is a tool to do it, but pretty easy to do it w/o it. Just as Simp says, you just need a driver to re-install. The pic above is the tach drive shaft bushing. If you don't have one, a socket can be used, I used to use a snappy 1/2 chrome deep socket. The drive end fit perfectly in the seal bore. However, sometimes it is the shaft that is the issue, so a seal might fix it for a bit, but it will happen again. IIRC, the assembly can be remover/replaced with the pump installed, sorry, it's been a bit. It is true, use it or lose it!

 

[mgman]

New shaft on the way.

 

[WillWagner]

IIRC....again....the drive onthe military stuff was larger than "normal" Make sure you give an ESN to whom ever is ordering the shaft. If they can't do it, I can supply an OLD number and it can be cross referenced

 

[mgman]

Th

IIRC....again....the drive onthe military stuff was larger than "normal" Make sure you give an ESN to whom ever is ordering the shaft. If they can't do it, I can supply an OLD number and it can be cross referenced

The one I ordered is in USGI packaging with the correct NSN and PN.

 

[rneely]

Th

The one I ordered is in USGI packaging with the correct NSN and PN.

Where is this seal located, on the trans or on the tach cable and what is AFC?