Hydroboost leaking

[lothar863]

I have found that my hydroboost unit is leaking from a rear seal and dripping into the cab.

I looked under the floor mat and I think this has been going on for awhile looking at the carpet.

Is this unit rebuild-able? It is working there is just a small drip of fluid every time I press the brake.

 

[Big Chip]

I had that exact same thing happening. I don’t know if they are “self-rebuildable” but rebuilding is available or rebuilt units are also available. You need your brake code to get the proper one. O’Reilly is where I found mine after a fruitless internet search. I don’t recall cost.

 

[lothar863]

Where do i find my brake code?

 

[Rickf]

https://www.summitracing.com/parts/aaz-52-7328/overview/year/1989/make/chevrolet/model/k3500

 

[Blue Ox]

Whatever you do, make sure you use power steering fluid in the replacement, not Dexron. Ignore the manual. ATF will make them leak. Ask me how I know.

 

[82Diesel]

Dang. I kinda got the same Superstition on my 82 C20 with the 6.2 in it... I check it once n a while, although it's a parts truck engine/trans etc still complete. But Yeah I'm hoping this one isn't bad either... I think it's just a break line blew. I don't care about it anyhow the rear drum is stuck and I already tried to unstick it but gave up... lol It's a 3/4 Ton so.

 

[Blue Ox]

Hydroboost will leak into the cab when it fails. if it's leaking outside it's something else.

 

[82Diesel]

Hydroboost will leak into the cab when it fails. if it's leaking outside it's something else.

Gotcha. Probably a brake line then... when i bought that 3/4 Ton truck it sat for 23 yrs. (93) when the owner parked it, He was easily 85 yrs old.