[Slim Bethune]

I have installed a mustang II power rack and pinion and a GM pump. I just tried bleeding the system and in countered alot of jumping of the wheel and tires as I turned the steering back and forth. I have changed the pump pressure with a Borgeson kit (4 shims) should be about 1000 PSI. Ideas?

[35terraplane]

Originally Posted by Slim Bethune

I have installed a mustang II power rack and pinion and a GM pump. I just tried bleeding the system and in countered alot of jumping of the wheel and tires as I turned the steering back and forth. I have changed the pump pressure with a Borgeson kit (4 shims) should be about 1000 PSI. Ideas?

Did you put the valve in to reduce pressure from the Gm pump. If you have a Mustang rack you have to use one. If you use a T-Bird rack and a gen II pump, you do not need one.

You can find them in speedway.

Bob

[Slim Bethune]

I assume I have a mustang II rack and pinion and I've been told then TB and mustang are the same ( assume and here say not so good). I did alter the valve with a shim kit. Since my first post I checked the fluid level and noticed lot of bubbles in the fluid, so I did the bleeding again. My new Question is does the jumping indicate air in the system?

[35terraplane]

Originally Posted by Slim Bethune

I assume I have a mustang II rack and pinion and I've been told then TB and mustang are the same ( assume and here say not so good). I did alter the valve with a shim kit. Since my first post I checked the fluid level and noticed lot of bubbles in the fluid, so I did the bleeding again. My new Question is does the jumping indicate air in the system?

There's a good chance, you might have air getting into system.

The TB- racks from the, I think mid 80's to early 90's will work without the valve, and using what they call the GM GEN II pump. Speedway as every thing you need for them.

Bob

[Slim Bethune]

I'm going to bleed it again in awhile it seem to get better each time, must be air in the system still.

[solidaxel]

Before you do anything I would check and see if you have the hoses swapped on the rack!

[Slim Bethune]

Hoses are right ( pressure to the front return to the rear) I think that everything is OK, I ran it again last night and all was well. It seems that letting it sit between bleeding sessions does slot of good, no more bubbles in the fluid--- Thanks to all for the help