HD6G injector pump

[caseman68]

Hi, I need info on how to change the seal on my Allis HD6G pump.
It has previously been leaking fuel into my oil. Can someone please tell me where to buy the seal, where in the pump the seal goes, and the process to replace it.

 

[Dieseltech]

There are several places the American Bosch PSB pump can leak fuel into oil, simplest to start with is the gear supply pump seal, so start there. Remove the gear pump, then drive gear. The seal part # is PK7910. I drill a small hole just inside the outer seal edge and use a drywall screw in the hole to pull the seal out..

 

[caseman68]

Thx Dieseltech. I’m well rounded mechanically but not familiar with the pump definitions. How involved is this procedure and will things need to be re timed after?

 

[Dieseltech]

The gear supply pump bolts on the injection pump side and needs no timing to remove/replace. The injection pump is what needs timed, UNLESS the engine has not run for awhile. The PSB pumps are prone to breaking the plunger when setting unused..