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Old 01-31-2013, 06:13 PM   #1
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1974 20' Argosy 20
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Hydroboost accumulator

The newer hydroboost units as used on the Classic series has a built in accumulator (typically a blue canister) whereas on the older Argosy P30 chassis the accumulator was a separate canister (typically dirty and grungy!).

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The older style accumulator is no longer available. What I would like to know is whether or not there is any kind of service that can be done to these things, do they go bad over time or do they last forever?

At the moment I have no idea if mine is any good since I've not had a motor in the chassis since I bought the Argosy.

Any thoughts?

Brad
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Old 02-09-2013, 02:39 PM   #2
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Go to the newer style perhaps?
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Old 02-10-2013, 05:58 PM   #3
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Quote:
Originally Posted by Robfike View Post
Go to the newer style perhaps?
Rob, I looked into that but it doesn't appear that there is room for the newer style hydroboost. I'm hoping that my accumulator is ok as they are discontinued from the factory.

I'm keeping my fingers crossed!

Brad
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Old 02-14-2013, 12:45 PM   #4
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It seems from my reading that teh earlier accumulators had a huge spring behind the piston with a seal... The later ones used a nitrogen filled unit.

I bet you could rebuild it.

Some reading for ya that might help....
1986 Chevrolet 1 Ton Steering Rebuild Hydroboost Brakes Rebuilt Nitrogen Accumulator Photo 12

Wally&Sue: Accumulators on the hydroboost
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Old 02-15-2013, 04:32 PM   #5
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Steve,

This accumulator is a tube with the ends welded on. I have no idea if it works, I'm going to assume it is ok since the only option is to try and find a replacement that no longer exists. Every shop I talk to about it looks at me like I'm crazy (ok, so maybe they have a point!). I'm not sure GM used them for very long and I've not seen any other models that had them. The 77 Argosies apparently didn't use them.

I finished cleaning it up and it's painted. While cleaning I found that the piston inside seems to be free so that's a bonus. I can't see where they could weld it with any kind of rubber seal on the piston so with luck it's still ok.

We'll know if it's good or not sometime this spring or summer
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