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Re: Switching from the hydro vac system to dual resistor master cylinder
Est2rad customs #1346511 Fri Feb 14 2020 06:19 PM
Joined: Feb 2020
Posts: 39
E
Wrench Fetcher
If that's the steps to bleeding the system then it may be posible that thier is nothing wrong with it they just didnt know how to bleed it properly could that be possible

Re: Switching from the hydro vac system to dual resistor master cylinder
Est2rad customs #1346516 Fri Feb 14 2020 06:48 PM
Joined: Sep 2001
Posts: 30,307
ace skiver
Est2rad customs,

A request/suggestion: you might want to try to break down your posts with sentences that end with a period (a dot: . ).
Or, press the Return key (once or twice) after each "thought" (placing a blank line between each though/question/statement).

If the Hydro-Vac was not correctly bled, it might behave very poorly/incorrectly.
I learned this when dealing with my first Hydro-Vac system (a 54/55 GMC 2-ton/350).


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
Re: Switching from the hydro vac system to dual resistor master cylinder
Est2rad customs #1346519 Fri Feb 14 2020 07:17 PM
Joined: Feb 2004
Posts: 20,827
H
Boltergeist
It's almost a necessity to use a pressure bleeder setup to purge all the air out of a Hydrovac equipped vehicle. Work your way from the master cylinder to the wheels, opening each bleeder in turn to assure there's a solid column of fluid all the way. Hydrovacs have one or more bleeder screws, and some of the big rig brake systems have two brake cylinders per wheel. Another sneaky trick is to use a piece of clear plastic hose attached to the bleeder screws and submerge the end of the hose in a small container of brake fluid (like a baby food jar) as you crack the bleeder open just a bit. When the hose stops bubbling, all the air in the line and the brake cylinder is gone.

I've tried the Mityvac suction bleeding system at times, with less than impressive results, comparted to a good pressure bleeder setup. Unless some sort of sealer is used on the bleeder screw threads, air gets pulled past the threads, and can actually make its way back into a wheel cylinder.
Jerry





The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: Switching from the hydro vac system to dual resistor master cylinder
Est2rad customs #1346522 Fri Feb 14 2020 07:42 PM
Joined: Sep 2001
Posts: 30,307
ace skiver
"It's almost a necessity to use a pressure bleeder setup to purge all the air out of a Hydrovac equipped vehicle."

This model worked on my 54/55 GMC: Motive Products, Power Brake Bleeder model 100


Tim
1954Advance-Design.com [1954advance-design.com]
1954 3106 Carryall Suburban [stovebolt.com] - part of the family for 49 years
1954 3104 5-window pickup w/Hydra-Matic [1954advance-design.com] - part of the family for 15 years
- If you have to stomp on your foot-pedal starter, either you, or your starter, or your engine, has a problem.
- The 216 and early 235 engines are not "splash oilers" - this is a splash oiler. [chevy.oldcarmanualproject.com]
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