hydroboost and steering - trouble

[DDeFreece]

Problem solved - lines were backwards :--)





Did a search but didn't see anything that matched what is going on. I need to drive this thing to work tomorrow. I am in a bind. AND, the wife is not happy as it's been under the carport for 2 months.



It turns perfect until I hit the brake pedal then it loses power steering. If I even tap the brake the steering goes out until I let up.



I just put a Cummins in my truck and it already had the PS pump on it. I have never dealt with hydroboost before.



1978 Chevy Bonanza Blazer (great shape I might add - New Mexico truck)

Rebuilt Cummins 4BT

Chevy NV4500 mated to an NP465 Bellhousing w/o adapter

NP205 32 spline mated to the NV4500 w/o adapter

14 Bolt FF Rear with Eldorado disc brakes

Dana 60 front with d60 calipers



Everything above but the rear was just put in. Cranked it for the first time Friday. I have about 20 minutes run time on the motor. Before this the PS pump sat up on the engine full of oil for about 2 years.



I installed new lines, new hydroboost, and new master cylinder. Old steering box but was having no problems with it.



I just bled the brakes again and got no air out.



Thanks - please help. I have about three more hours to work on it tonight.

 

[MicroOutlawRacer]

Hmmm That sounds like you are running out of pressure when you apply the brakes. Do you have power brakes when you step on the brakes or do they feel manual as if the hydroboost isnt doing anything? Someone else im sure knows way more on this then me but I would check that I have everything plumbed going in the right direction and if it is your pump might not be putting out enough flow to maintain pressure doing both jobs. Once again im no expert in hydros.

 

[DDeFreece]

Problem solved - lines were backwards



Thanks!