Hydrovac rebuild... any tips?

pfarber · Post by **pfarber** » Thu Aug 10, 2006 3:21 pm

I have a rebuild kit in the mail.... and absolutly no information on how to do a hydrovac rebuild.

It looks like a lot of simply gasket/seal replacment.... but any other GOTCHA's?

Anyone have a TM that covers Hydrovac rebuild?

wartruk44 · Post by **wartruk44** » Fri Sep 29, 2006 8:38 pm

Go to Autozone and order a Hydrovac for a 1 ton GMC 1947. It is $172.00 plus core with a lifetime warranty and it works great!!

42cckw · Post by **42cckw** » Sat Sep 30, 2006 9:56 am

Are the hydrovac's the same size

One would think a hydro for a one ton chevy feeding 4 brake cylinders is not the same as a 2 1/2 ton GMC feeding 6 cylinders . Plus I would say there is a big weight difference between the two trucks, I would aire on the side of caution when I push my brake pedal I want to stop

$172.00 with a life time warranty sounds great but are we talking apples for apples here.

Karoshi · Post by **Karoshi** » Sat Sep 30, 2006 10:58 am

I agree whole heartedly. The only saving grace is that presumably these trucks are to be driven unladen and not commercially with a load. Therefore the smaller HydroVac MIGHT be suitable.

Its not a chance I would take though.

dr deuce · Post by **dr deuce** » Sat Sep 30, 2006 5:48 pm

You might not have enough juice to run all 6 cylinders.

There is a more modern diaphram type that I use in place of the piston type original

wartruk44 · Post by **wartruk44** » Thu Oct 05, 2006 5:07 pm

I have installed this single piston on my 21/2 ton and it will lock up all 10 wheels. Since I will not be hauling the weight I feel good about it. I researched this for months before I made a decision. I found a company that will rebuild the type II for about $500.00.

The GMC CCKW

Hydrovac rebuild... any tips?

Hydrovac rebuild... any tips?

1 ton hydrovac