Engine/Transmission (1994 - 1998) Hyrdaboost barb on power steering pump...can I plug it?? Do I need it?

[RSchwarzli]

Question. On the back side of the PS pump on 97 and newer 12Vs there is a third port used I gather, for feeding fluid to the Hydra boost braking system.



I have the 97 12V motor now in the crew cab. I dont have a spot for that line to go.



Can I just plug it or cap it off? How much pressure is normally in that line? Where does it feed to exactly? How does it return?



Thanks!

 

[JKosten]

Sorry, is that barb going to the housing as a return line?

 

[DWeaver]

It is for a return line. The hydro boost has a return as well as the steering gear.

You could plug it, and I would say it would be fine. (shrug)

After reading your whole thread on the impressive build your doing, IMO I would just get a '94 to '96 PS can and put the pump into it. It would only have the one return line.

 

[RSchwarzli]

It is for a return line. The hydro boost has a return as well as the steering gear.

I presume it is a common pressure out line then that supplies both?

You could plug it, and I would say it would be fine. (shrug)

Interesting... I will post a pic.....

After reading your whole thread on the impressive build your doing, IMO I would just get a '94 to '96 PS can and put the pump into it. It would only have the one return line.

Thanks for the compliment and thoughts.



I may pull it off the 93 motor sitting in the garage..... just a PIA to get at now and then the 10K mile components would not end up being used!

 

[DWeaver]

Sorry, I have been called vague before. :-laf



Yes the common pressure line supplies the hydro-boost then continues on to the steering gear.



Keep the 10k components and just swap the "can". The actual pump is housed in the can. Take out two bolts on the back of the can, and the pressure fitting, then tap the "can" part with a wooden mallet while holding the power steering pump shaft. The can will come off.



There is an o-ring in between the can and pump that I personally would replace. I find it easiest to buy a PS pump repair kit with all the o-rings and just use the one's I need.



I will post up some pics as soon as I can get them.

 

[DWeaver]

The first is the '96's can.



The second is the '98's can that I swapped onto the '96 pump that I rebuilt. The two stems on the back are just returns on the '98.



Sorry for the bad pic, can't make my arm bend right.



Maybe these two threads can explain better than me.



https://www.turbodieselregister.com...76-early-2nd-gen-hydroboost-conversion-s.html



https://www.turbodieselregister.com...ions/216109-vacuum-hydroboost-conversion.html