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Author Topic: '75 P30 Hydroboost  (Read 12437 times)

Offline 75P30

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'75 P30 Hydroboost
« on: October 24, 2014, 01:43:39 pm »
It leaks where the pushrod enters it.  I haven't been able to locate a new or rebuilt one. Napa showed one, but it must've just recently gone the way of the Dodo.
Piratejack.net has a couple of rebuild kits that I'd have to match up the parts with their site's picture. That's a possibility, but I can't take the truck out of service (business vehicle) just to look at parts and maybe wait for them to show up.
I am adding Lucas sealer as it leaks.  Even if it works, not a good fix.
I'd remove and eliminate it if I knew what master cylinder to replace it with and how to plug up the hoses. 
Anyone ever mess with this stuff?   
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Offline 78BIG-TEN

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Re: '75 P30 Hydroboost
« Reply #1 on: October 24, 2014, 03:46:45 pm »
You should be able to get a reman unit,try another parts source,national chain
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Offline 75P30

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Re: '75 P30 Hydroboost
« Reply #2 on: October 25, 2014, 09:28:19 am »
Quote from: 78BIG-TEN on October 24, 2014, 03:46:45 pm
You should be able to get a reman unit,try another parts source,national chain
I've tried Rockauto, AutoZone, Advance, Pep Boys and Mill Supply. 
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Offline VileZambonie

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Re: '75 P30 Hydroboost
« Reply #3 on: October 25, 2014, 10:00:21 am »
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Offline bd

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Re: '75 P30 Hydroboost
« Reply #4 on: October 25, 2014, 01:48:17 pm »
Quote from: VileZambonie on October 25, 2014, 10:00:21 am
It looks like summitracing carries it from cardone

http://www.summitracing.com/parts/aaz-52-7249/overview/year/1975/make/chevrolet/model/p30

Good find, Vile!

Unfortunately, Summit is displaying the wrong image for this part.   ???

The correct image for 52-7249 can be found on the Cardone website.
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Offline 75P30

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Re: '75 P30 Hydroboost
« Reply #5 on: October 25, 2014, 09:10:50 pm »
Quote from: bd on October 25, 2014, 01:48:17 pm
Quote from: VileZambonie on October 25, 2014, 10:00:21 am
It looks like summitracing carries it from cardone

http://www.summitracing.com/parts/aaz-52-7249/overview/year/1975/make/chevrolet/model/p30

Good find, Vile!

Unfortunately, Summit is displaying the wrong image for this part.   ???

The correct image for 52-7249 can be found on the Cardone website.
Yeah, I was going to say, that's the wrong image.  I ordered one from Summit.  I googled "Cardone 52-7249" and found several sources.  Some of them show it as unavailable or out of stock.   I'm having a hard time believing that it's really available since it's so hard to find.  I will find out! 
Thank you for the help.  I will update.
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Offline 75P30

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Re: '75 P30 Hydroboost
« Reply #6 on: October 26, 2014, 09:17:16 am »
Summit's order confirmation email is showing it as backordered.
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Offline roundhouse

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Re: '75 P30 Hydroboost
« Reply #7 on: October 26, 2014, 09:41:11 am »
Is another hydro boost interchangeable ?

They used em in 82 pickups with the diesel and we just sold a 96 P chassis that had a hydro boost

And in Astro vans

Looked the same to me
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Offline VileZambonie

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Re: '75 P30 Hydroboost
« Reply #8 on: October 26, 2014, 10:45:59 am »
Personally I would trash the hydroboost system altogether but here try this:

http://www.ebay.com/itm/Cardone-Industries-52-7249-/111306079385?_trksid=p2054897.l4275
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74 GMC, 75 K5, 84 GMC, 85 K20, 86 k20, 79 K10

Offline 78BIG-TEN

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Re: '75 P30 Hydroboost
« Reply #9 on: October 26, 2014, 02:23:11 pm »
Oreilly
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Offline Irish_Alley

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Re: '75 P30 Hydroboost
« Reply #10 on: November 05, 2014, 01:34:59 am »
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Offline 75P30

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Re: '75 P30 Hydroboost
« Reply #11 on: February 06, 2015, 07:48:30 am »
It's been a while but just to update:
Summit kept changing the date for shipment.  I gave up and cancelled. I'm pretty sure it's not available, anywhere.   
I have added Lucas PS Sealer and it has all but stopped the leak. But that can only be temporary.
I would eliminate the thing, I don't mind manual brakes.  But, I have no idea what lines to disconnect.  Plus, I imagine the pedal ratio would be all wrong.
I wouldn't mind manual steering, either. (To get rid of everything hydroboost related.) I'd have to change out the steering box, but that's a whole other ball game...
I did find this:
http://www.piratejack.net/index.php?option=com_virtuemart&page=shop.browse&category_id=26&Itemid=6&vmcchk=1&Itemid=6
Maybe I could pull it apart and match up parts. 
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Offline 78BIG-TEN

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Re: '75 P30 Hydroboost
« Reply #12 on: February 06, 2015, 09:13:20 am »
Oreillys Houston warehouse shows it #52-7249
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Offline 75P30

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Re: '75 P30 Hydroboost
« Reply #13 on: February 06, 2015, 08:30:23 pm »
Thanks 78bigten, it says unavailable, like everywhere I have checked.
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Offline 78BIG-TEN

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Re: '75 P30 Hydroboost
« Reply #14 on: February 07, 2015, 11:13:25 am »
I'm linked in to first call(oreillys) here in SA and it shows me the store,the hub and the Houston warehouse stock and some others.Sorry I checked again and its not Houston,shows LDC,Seagoville Tx.If you like I can call and check for sure thru my end
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