my injector pump is leaking out of the low presseir cup i changed the seal on the shut off pin but it still is leaking ? thanks ew

Can,t quite figure out where your saying the leak is.Is it the injection housing area or just what part is it there that is leaking?

its the injector housing

The throttle shaft where it comes through the housing has a lip seal & then there is gaskets in other areas an or "O" ring seals so if you don,t have a parts book to pin the leak down I,d say go to the Cat dealer & have them look it up for you then you can get the seals or gaskets you need.

You said low pressure cup. Are you referring to the shutoff housing on the top were the solenoid goes. There it would leak out the spaghetti hoses down the left front corner of the engine (if it still has them). That is the piece that you have to remove the top of the pump to get to.

Hi Team,
maybe these parts pix will help to pin down the leak area. The main housing is at transfer pump pressure.
NOTE the seal in pix 1 for the Shut Off Shaft is shown incorrectly, the seal lip must face towards the pressure fuel in the main housing, ie, the seal lip must be facing out as it is installed and is hard to install because of this as you only have the edge of the seal case to push on. At the dealer we had a special tool for this. The old seal case is also hard to remove without damaging the seal case bore, use sealant on the housing /seal.
Cheers,
Eddie B.