Hydroboost help needed. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kipps · 05-01-2019, 10:10 PM

Does anyone have any tips on getting the accumulator snap ring out of its groove? I've been soaking it in PBlaster, have pressed the accumulator in to relieve the tension, and have been tapping on the end of the snap ring with a small pick and hammer, but with no luck. It won't budge a bit that I can tell.

kipps · 05-06-2019, 12:23 PM

Figured it out. The gap in the snap ring was not lined up with the hole in the case. I drilled a new hole, pressed a punch through that to expose the snap ring, and popped it right out.

Here's a very good thread about rebuilding a hydroboost unit. You'll likely need to make a profile to view the pics, but they're well worth it if you're not confident in rebuilding a hydroboost. I signed up just for those pics.

fordguy40 · 05-07-2019, 12:53 AM

That's a good read. Thanks for posting the link!

kipps · 07-26-2019, 07:04 PM

mistake post

**hatzie** · 07-26-2019, 08:39 PM

IIRC The 1970's GM Light Truck Unit Repair manuals have info on rebuilding Hydroboost units. If not in the Unit Manuals it's in the actual manuals.
Lots of detailed info on these types of components in the older manuals that was cut from the newer ones.

05-01-2019, 10:10 PM	#1
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,104	Hydroboost help needed. Does anyone have any tips on getting the accumulator snap ring out of its groove? I've been soaking it in PBlaster, have pressed the accumulator in to relieve the tension, and have been tapping on the end of the snap ring with a small pick and hammer, but with no luck. It won't budge a bit that I can tell.

05-06-2019, 12:23 PM	#2
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,104	Re: Hydroboost help needed. Figured it out. The gap in the snap ring was not lined up with the hole in the case. I drilled a new hole, pressed a punch through that to expose the snap ring, and popped it right out. Here's a very good thread about rebuilding a hydroboost unit. You'll likely need to make a profile to view the pics, but they're well worth it if you're not confident in rebuilding a hydroboost. I signed up just for those pics. Last edited by kipps; 05-06-2019 at 03:39 PM.

05-07-2019, 12:53 AM	#3
fordguy40 Registered User Join Date: Feb 2018 Location: Montclair, CA Posts: 149	Re: Hydroboost help needed. That's a good read. Thanks for posting the link! __________________ A few Fords and a couple of Chevys

07-26-2019, 07:04 PM	#4
kipps Registered User Join Date: Jul 2014 Location: North-central Virginia Posts: 1,104	Re: Hydroboost help needed. mistake post __________________ 1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome!

07-26-2019, 08:39 PM	#5
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,977	Re: Hydroboost help needed. IIRC The 1970's GM Light Truck Unit Repair manuals have info on rebuilding Hydroboost units. If not in the Unit Manuals it's in the actual manuals. Lots of detailed info on these types of components in the older manuals that was cut from the newer ones. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

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