Powers steering system pressure

[wovenrovings]

I am putting the proper isuzu pump on my engine (the belt driven one it has been using is on the way out) and i wondered if these pumps needed to have the relief valve adjusted down so they didn't over pressure the steering box?
Looking in my books i get the impression that the landrover system runs at about 850psi and the isuzu pump relief valve is set to 1200psi. I have a feeling i might not have understood how the system works though.

Don't want to bust my steering box open.

Cheers

[isuzu110]

I had this problem.

I had a retrofitted isuzu 4BE1 in my 85 county with a 3-bolt box. I managed to split the housing on the box. I upgraded to a 4-bolt box and the PS place measured the pressure from the isuzu pump and it was way over spec. I recall they swapped out my pump for another 4BD1 (interchangeable) set at the right pressure. Sorry, don't know specs.

Unit failed whilst doing a 3-point turn on a narrow bush track.

[wovenrovings]

Thanks isuzu 110. Well the pump i have is a 4BE1 pump. So it sounds like I need to get the relief valve changed. Does any one know what the relief valve pressure should be?

[isuzu110]

Hope someone else can assist

If you really get stuck, this is the place that worked on mine

Auto Power Steering Pty Ltd
21 Campbell St Bowen Hills QLD 4006 - map (http://www.yellowpages.com.au/onlineSolution_redirect.do?z=304006&plNm=Auto+Power+Steering+Pty+Ltd&loc=Bowen+Hills&pageNumber=1&stNm=Campbell&pc=4006&stTp=St&pt=m&ste=QLD&phNbr=%2807%29+3252+5820&iblId=4087923&stNbr=21&st=cs)
ph: (07) 3252 5820

The bloke was very helpful and seemed to know his stuff.