Hydro-boost bleed ?

[jkcondrey]

Had the hydro-booster go out on the 1152. When replacing, TM -2 , 7-14, makes no mention of bleeding the unit. Is there a process someplace I am missing or it tied directly to the power steering bleed procedure? Thanks

 

[Mogman]

I have never had to bleed one, if it works then you are good to go.

 

[jkcondrey]

I got around to swapping the hydro booster. Got a nos part. The pushrod on the master cylinder side is quite long, compared to the old unit over an inch more extension outward. I went ahead and installed and the brakes are locked up. Booster #’s said to match on rosy, but either it’s wrong part # or bad NOS booster? Anyone else ran into this?

 

[Action]

I got around to swapping the hydro booster. Got a nos part. The pushrod on the master cylinder side is quite long, compared to the old unit over an inch more extension outward. I went ahead and installed and the brakes are locked up. Booster #’s said to match on rosy, but either it’s wrong part # or bad NOS booster? Anyone else ran into this?

may be useless info, but each different hydrobooster has different color studs. They match up to the master cylinder, i think.

 

[Mogman]

If it was the wrong one it would not bolt up to the master cylinder, my question is why install one that had an obvious defect?

 

[Retiredwarhorses]

Thats a REV booster….orange studs are REV, you need blue studs
Your brakes will be locked up after about 150ft of driving.
that booster uses the Plastic reservoir and bosch MC

 

[jkcondrey]

may be useless info, but each different hydrobooster has different color studs. They match up to the master cylinder, i think.

Hmm. I hadn’t heard that. I’ll double check that. I do have a spare parts truck but the booster would be bad for sure, sat out in weather for who knows how long.

 

[jkcondrey]

If it was the wrong one it would not bolt up to the master cylinder, my question is why install one that had an obvious defect?

I wouldn’t know it had a defect from looking at it. For all I know the loss of brakes could’ve been that part of the booster. But sounds like Steve and Action pointed the right direction.
Thanks all