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Old 12-31-2004, 11:23 AM   #1
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Hydro-boost needs rebuild

The mechanics at the Chevy dealership said they couldn't get the rod out of the middle of this thing, and are sending it to a rebuild place. They say that if it can't be rebuilt, they haven't found a replacement yet. Any ideas where we can find one?
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Old 12-31-2004, 01:08 PM   #2
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Quote:
Originally Posted by Astrodokk
The mechanics at the Chevy dealership said they couldn't get the rod out of the middle of this thing, and are sending it to a rebuild place. They say that if it can't be rebuilt, they haven't found a replacement yet. Any ideas where we can find one?
Thats not an uncommon part. There are plenty of places to get that. This guy and I had some debates about the need for Hydroboost on some vehicles. Tell him "Grim Reaper" sent you. He will get a laugh out of it. He makes custom set ups from stock GM parts and should be able to set you up with what you need.

http://www.hydroboost.com/index.html
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Old 12-31-2004, 04:12 PM   #3
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Quote:
Originally Posted by 59toaster
Thats not an uncommon part. There are plenty of places to get that. This guy and I had some debates about the need for Hydroboost on some vehicles. Tell him "Grim Reaper" sent you. He will get a laugh out of it. He makes custom set ups from stock GM parts and should be able to set you up with what you need.

http://www.hydroboost.com/index.html
Thanks. I sent them an email.
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Old 12-31-2004, 04:23 PM   #4
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hydro-booster

When my hydro-booster went out i replaced it with a new one from Workhorse Chasis. Good Luck ...
http://www.workhorse.com/
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Old 12-31-2004, 05:29 PM   #5
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You will want to double check the part number on this but I found them on www.rockauto.com for the P30 MH Chassis for both 2 wheel and 4 wheel disc brake systems. Rebuilts for around $200 less a $40 core).

Again check the p/n but I've ordered parts from these guys before and have had no problems at all.
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Old 03-03-2005, 08:39 AM   #6
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I'm replacing the Hydro-Boost power brake unit in my '74 Argosy. This thing was a real bear to remove, but it's finally out. Now, I can't figure how to remove the pushrod from the front end. There appears to be some sort of retaining ring down deep in the bore, but I really don't want to force anything.

Can anyone who's been there offer guidance?

Bob
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Old 03-03-2005, 03:24 PM   #7
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Since I hired the dealer to do the job, I have no first hand knowledge of the difficulty of removing the rod, but i was told by them that it was a bear and actually, the rod came out in the hydroboost and they couldn't remove it from the housing...it had to be sent to a shop 100 miles away to get done and rebuilt. Good luck.
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Old 03-03-2005, 08:54 PM   #8
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Got the pushrod out. Turns out the retaining collar is actually a hard rubber or flexible plastic material. The installed collar has to be destroyed to get the pushrod out. The replacement unit I bought from Rock Auto included a new retaining collar.

There's apparently a factory tool that will do the job easily. My solution, though less elegant, was effective (see pic). I attached the spider from the 3-jaw puller for my slide hammer to the pushrod. After chucking the Hydro-Boost in the vise, a few whacks sheared the retaining collar and freed the pushrod. The picture shows how I attached the pushrod to the slide hammer. Note that this is a big slide hammer, about 5 lbs.

In the photo, I've already installed the new collar on the pushrod. The pushrod should install with a few gentle taps. Now, to wrestle the whole assembly back into place!

Note: I assembled the pushrod to the slide hammer for photo purposes - it's not needed for reassembly. A much smaller dead-blow hammer should work.

Bob
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Old 03-03-2005, 09:42 PM   #9
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Just a question....are we talking about the same hydroboost found in my 2004 Suburban or is this the commercial heavy, heavy duty version?
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