Oops! I adjusted the pressure relief valve on my TRW power steering pump - what now?

[Lloyd Hammond]

Hi, Never having rebuilt one of these before, I bought a kit and disassembled the unit. It was leaking from the main body seal. That seal was rock hard and square. Also found other seals needed replacing. It had a good clean and I reassembled it. Only problem is, I disassembled the pressure relief valve (followed a youtube - that was really bad). The guy pulled the pump apart, cleaned the relief valve and screwed it back together. I cleaned it out and then screwed it up, not realising that it was a 'factory set'. How do I reset it? Just go half way?

On a separate issue, the flow control valve was very tight in its bore. I had to lightly tap it out with a small drift. Is that normal?

My pump looks idential to the one in the pic below.

Cheers.

 

[khryslerkid]

At the 5:00 mark...

 

[Lloyd Hammond]

At the 5:00 mark...

Thanks, but that's the video that led me astray. The guy pulls out the pressure relief valve, unscrews it and just screws it back together, hand tight. The calibration of the relief valve is lost. Apparently they are factory set. It looks like it was hand tight, which gives me a rough lead. Probably needed to be fitted with loctite too, if it's only hand tight.

 

[pnora]

You are at a guessing point. Only way to know is with gauges.

 

[khryslerkid]

Factory set might mean you just make it tight and forget about it. Being tight with the spring and check ball should be Factory set. Was everything tight when you took it apart?

 

[khryslerkid]

It looks like it was hand tight, which gives me a rough lead. Probably needed to be fitted with loctite too, if it's only hand tight.

He stated that he had already loosened everything. That's why it appeared it was hand tight.

 

[pnora]

Factory set might mean you just make it tight and forget about it. Being tight with the spring and check ball should be Factory set. Was everything tight when you took it apart?

That valve is preset from the factory. The adjustment is made when the valve is made. It is adjustable but not recognized in the factory manuals. Once he has taken it apart without marking it there is no way to know its setting.

 

[khryslerkid]

That valve is preset from the factory. The adjustment is made when the valve is made. It is adjustable but not recognized in the factory manuals. Once he has taken it apart without marking it there is no way to know its setting.

That's screwed up. I guess the guy in the vid screwed up too. I did a Saginaw not long ago and you just tighten it all up tight.

 

[pnora]

That's screwed up. I guess the guy in the vid screwed up too. I did a Saginaw not long ago and you just tighten it all up tight.

Guy in the vid did not know jack ****. Gets an A for effort. You can adjust the Saginaw with shims. His is the .96 pump. All he can do is try it. If there is issues he could take it apart and try adjusting it. The FSM shows pressure and flow test. What ever test fails you throw parts at it, no adjustments. So now at this point a guy has to think out of the box.

 

[khryslerkid]

Guy in the vid did not know jack ****. Gets an A for effort. You can adjust the Saginaw with shims. His is the .96 pump. All he can do is try it. If there is issues he could take it apart and try adjusting it. The FSM shows pressure and flow test. What ever test fails you throw parts at it, no adjustments. So now at this point a guy has to think out of the box.

Op's not the first...

TRW power Steering

You might find a donor relief valve. Looked up a couple and they range from $60 to $600!

 

[pnora]

Op's not the first...

TRW power Steering

You might find a donor relief valve. Looked up a couple and they range from $60 to $600!

Myself I prefer the Saginaw pumps. Here is a picture of the Saginaw combination flow and relief valve. You can see the shims.