there are several threads on adding Hydroboost, I have the Astro unit as well, and searched the boards coming away with these.
I believe what your asking is in there somewhere..
hydroboost rod length
http://67-72chevytrucks.com/vboard/s...d.php?t=448895
How I got Hydroboost for under $80 (including lines)
http://67-72chevytrucks.com/vboard/s...ferrerid=28772
http://67-72chevytrucks.com/vboard/s...3&postcount=46
http://www.pirate4x4.com/forum/jeep-...oost-info.html
Hydroboost info
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Well, I'm on a lazy search again... wanting to learn about hydroboost.
I'm going to post some links, and pics. I'd like to find out more info...
And for those that think this is not hardcore, you find better info!
I'd like to open this to people to post thier pics of different Hydroboot units.
The Bendix "Hydro-Boost" system dates back to 1973. The system uses hydraulic pressure generated by the power steering pump rather than engine vacuum to provide power assist. Still in uses today.
Delco also has a Hydro Boost system.
Why Hydrooboost over a vacuum canister? Hydroboost give you Variable gains available (4:1 to 8.2:1)
Best post I've found on Pirate4x4 for Hydroboost info:
http://www.pirate4x4.com/forum/showt...ght=hydroboost
Best guy for answering hydroboost questions on Pirate -> VancoPBS
- his web page: www . vancopbs . com/ (Hint: High Flow is good for Ram Assist)
More Links:
http://www.hydratechbraking.com/forums/
http://www.babcox.com/editorial/bf/bf030542.htm
http://www.foundationbrakes.com/en-u...s/default.aspx
http://www.powerbrakesonline.com/
Edit Even More:
http://www.remanbrakes.com/pdfs/hydr...stallation.pdf
http://www.brakeandfrontend.com/Arti...t_systems.aspx
http://nastyz28.com/forum/showthread.php?t=134759 How to rebuild not finished
http://wallyandsue.blogspot.com/2009...-rod-seal.html How to rebuild
http://wallyandsue.blogspot.com/2009...surements.html How to rebuild
http://books.google.com/books?id=hRm...page&q&f=false
http://vintagetest.com/chassis/dch74/V2D748005.pdf
http://www.ifsja.org/forums/vb/showthread.php?t=106056
http://bepco.biz/Catalogs/VacHydCat/S5_A.pdf
http://www.cpptse.com/BH-101.pdf
Bendix sold the hydroboost to Bosch in 1994
http://rb-kwin.bosch.com/en-NA/start/nfz_brake1.html (Link now dead)
Internet archive
http://replay.waybackmachine.org/200...fz_brake1.html (takes a while to load, maybe on tape?)
IMGs (Taken from other sites)
Hydroboost external accumulator design
The '80 - '85 Type II internal accumulator design:
spool valve
HUMVEE aka H1
bolt pattern of 4 1/4 x 3 3/8"
The "proper" way is to have the return from the HB go straight thru the "top" of the T and the Power steering gear needs to return thru the "Bottom" of the T. this provides for no back pressure into the HB unit.