justin mcfall

My power steering pump on my 90 is loosing fluid. The pump is not making any noise,can i just get the seal kit from cummins and re-seal everything,or do i need a new pump also? Thanks guys. Justin

archer39

you can reseal it. I need to do mine also. The part number for the kit was posted on here not to long ago.

wannadiesel

Cummins probably won't have a seal kit for the PS pump. It's kind of hard to find seal kits for those, most people just get a reman pump.

archer39

I was thinking about the seals between the power steering pump and the vacuum pump. This thread has the part number but i don't know if they are still current.

sdstriper

This should be the kit for the twin pod style pump. Cummins p/n 4089742 might be superseded by now, it was $7.42. Double check the content, I may have this number mixed up with the newer different style pump kit...

There are three o-rings besides the o-ring seal between the pwr steer pump and accy drive support. Along with the gasket.

Here's the Cummins p/n's for the individual pieces, again they may have been superceded;

3913192 accessory drive gasket
3910260 pod to drive support o-ring (qty-2)
3911805 pwr steer pump to drive support o-ring
3912822 o-ring between bottom pod bracket & drive support

justin mcfall

Thanks guys. I called cummins and the part number posted is still valid. It is $10.

justin mcfall

Thanks guys. I called cummins and the part number posted is still valid. It is $10.

wannadiesel

That's the seal between the two pumps. It only keeps oil from leaking out of the vacuum pump.

sdstriper

This one?

3911805 pwr steer pump to drive support o-ring

The above was $1.52 last time I checked...