Help with Replacement of NH 3930 Power Steering Pump

[TractorMiss]

I have a 1999 NH 3930. Having a problem with my power steering operating correctly. After warming up it pushes fluid out of pressure relief valve. About 3 months ago I replaced the filter and it improved for a short period of time. Now the leak is much worse plus fluid is frothy (getting hot?) Can someone direct me to instructions for removing and replacing the complete pump? My pump says Sauer Sundstrand #82854836. (33001)I found some sites referencing this number but they were not in English and I need pictures. lol lol Thank you in advance for any help!

 

[KYErik]

Frothy fluid sounds more like it could be water contamination- have you drained any fluid out of the bottom of the reservoir to see if it looks milky?

Are you thinking it is air? If so, check the suction line going to the pump very well. It sounds like you are ready to replace the pump but that may not be the cause of your issue.

 

[TractorTech]

TM, you refer to the relief valve and "the leak" as if they are external., when they are contained inside the reservoir.
As far as removing the pump, you remove the two lines on the pump and unbolt it from the engine by removing the two bolts on the timing cover. The pump and gear come right off.

 

[RickB]

TM, you refer to the relief valve and "the leak" as if they are external., when they are contained inside the reservoir.
As far as removing the pump, you remove the two lines on the pump and unbolt it from the engine by removing the two bolts on the timing cover. The pump and gear come right off.

My interpretation is that it's puking from the spring loaded vent in the reservoir. But a loose relief valve could easily be the culprit, that happens time to time.