55.2-59 Power Steering issues

[dew468]

I have installed a new PS pump along with the NEW CPP kit, checked all hoses and pump flow. took return line off and pump works perfect, but still no power steering. bleed it several time running and not, no change. still worse than original box. any help would be appreciated. on thing I can think of is new box is bad. HELP!!!! before I take a sledge hammer to it.

[mr48chev]

The pumps theselves are all pretty much the same inside and outside. it is the canisters Pulleys and pressure valves that are different.

That housing matches the one that was on my 71 GMC before I switched to the Cad 500 and the actual pump minus canister, pulley and pressure valve fit all of these.
AMERICAN MOTORS 1968-1974
BUICK 1961-1974
CADILLAC 1968-1974
CHEVROLET 1961-1974
CHRYSLER 1969-1974
DODGE 1963-1974
FORD 1972-1974
GMC 1966-1974
INTERNATIONAL 1972-1974
JAGUAR 1972-1979
JEEP 1972-1974
LINCOLN 1972-1974
MERCURY 1973-1974
OLDSMOBILE 1961-1974
PLYMOUTH 1965-1975
PONTIAC 1967-1974

I'm thinking that in 1975 they went to the pressed on pulley rather then the one that was held on with a nut and a key. Checking on the one for the 75 Cad 500 in my 75 that is correct, the 75's outside of Plymouth used a pump with a pressed on pulley.

[franken]

I can only offer sympathy. The PS pump is actually dead simple and pretty much works. I have to suggest the gearbox is the issue. I always replace the pump, box and hoses at the same time.

[dew468]

Thanks guys. Everything on there is new, so I'm at a loss. I've built cars all my life and even owned R &P performance for 22 yrs. I've NEVER had anything I couldn't fix until now. The new box is all I can think of that's left. I used a used pump that I know worked, then rebuilt it, them went with New not rebuilt.
There is fluid flowing thru the box so I believe that's all it can be.

[dsraven]

when turned and held at one of the steering locks, does he pump whine and the hoses flex as if the internal pressure in the system is rising?
the only real way to tell would be to check the pressures. a gauge and some fittings is actually pretty cheap compared to changing a bunch of parts and not knowing for sure if those parts are actually faulty., a small piece of debris inside the valve in the box could be your culprit. a good reason to clean the area first before starting a job and also always flush the system with the return line dumping into separate container after a single part is replaced so that no contaminants have a chance to go downstream into the workings.
it is possible that the hydraulic valve inside the box is not working so the fluid is bypassing through the valve and out rather than through the valve and being directed to the appropriate side of the piston inside the box or rack.

https://www.freeasestudyguides.com/p...sure-test.html

https://www.hotrod.com/articles/ccrp...ering-secrets/

[dew468]

guess my next step is to take box off and check it out. everything is new and flushed, filled with new fluid and re-bleed the system. same thing. I appreciate the suggestions.

[dew468]

well CCP thinks it's a bad box also so it leaves tomorrow to go bac to them for repair or replacement. Wish me luck, lol.

[dew468]

Well I finally got another new box from CPP today. As soon as things dry out, I'll try again. wish me luck.

[cansled]

Could you please provide a link to the A1 power steering pump off amazon you have working on the CPP setup. Looking to replace my used pump with a newer unit that has been verified to work. Thanks.

[dew468]

I got mine from RockAuto.