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Old 05-22-2012, 12:04 AM   #1
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GM Hydroboost issues

I am looking for any help with my 91 Southwind 34J on a Chevy P30 chassis. I have read on line of all the issues with the hydroboost systems and I have them all, hard pedal, pwr steering pump whinning, fluid bubbling and draining on the ground. The pwr steering pump, hoses, and hydroboost have been replaced without fixing the problems. I have followed the procedures for bleeding but it didn't solve the issues either. The rig only has 21K on the 454 and is in great shape. So I would appreciate any help and advice.

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Old 05-22-2012, 10:19 AM   #2
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Check the Master Cylinder...if it's binding, that would strain the Hydro boost, causing pwr steering pump noise.

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Old 05-22-2012, 09:42 PM   #3
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if you have autopark it sounds like you have overtravel. your parking brakes are either out of adjustment or worn out. if your parking brake sets automatically when you put it in park it is set by a spring, when you put it in drive or reverse the hydralic pressure/fluid from your powersteering pushes the spring back to release the brake. if your parking brake is worn/out of adjustment it removes too much fluid from the powersteering/hydroboost brakes and causes air to get in the line.
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Old 05-23-2012, 02:26 PM   #4
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that makes sense. the autopark was disengaged when I bought the rig. the pads on the ebrake were replaced and the previous owner was trying to fix the steering and brake issues before reengaging the autopark. I will reconnect everything and bleed the system and see what I get. Thanks again. Jim
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