Disc brake bleeding sequence

[thomas g. warner]

Emory have you stopped the push rod from moving on the combination valve
during bleeding?

Proper sequence for bleeding the brakes is:

1. Left front wheel
2. Right front wheel
3. left front bogie
4. left rear bogie
5. right front bogie
6. Right rear bogie

Have fun

>I am now on my second full day of trying to get the brakes bled properly. I
>just took a computer break to read messages and will go back out in about 30
>minutes. Any and all suggestions are welcome. I have tried gravity
>bleeding, vacuum bleeding, reverse pressure bleeding with a Phoenix bleeder.
>Still don't have good pedal. I got some more air out on the last vacuum
>bleed attempt but I've still got to try the other side before trying the
>brake pedal.
>
>Frustrated in Santa Fe
>Emery Stora
>77 Kingsley
>
>
>
>
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Tom & Marg Warner
Vernon Center NY
1976 palmbeach
"The beautiful Mohawk Vally"

 

[thomas g. warner]

The special GM tool keeps the pin from coming forward in the combination
valve. If you have a REBUILT master cylinder I would replace it. For some
reason they have a lot of problems with rebuilt master cylinder units

Emery you always should bleed starting from the master cylinder and working
to the farthest point from it. In fact I would pre-bleed the master
cylinder on the bench before even installing it. If you don't bleed the air
from the master cylinder and working to the nearest wheel cylinder first,
the air in the front will get forced to the back as you bleed.

>

>
>
>1. Left front wheel
>2. Right front wheel
>3. left front bogie
>4. left rear bogie
>5. right front bogie
>6. Right rear bogie >>
>
>This is what it shows in the 75-76 manual but in the 77-78 update it shows
>exactly the reverse. All manuals for every vehicle I've owned over the years
>say to bleed the one farthest away first. Maybe I'll try it in the order you
>listed.
>
>Question - on the proportional valve. I installed a new one. When the
>pressure is higher in the rear loop, does the pin in the proportional valve
>go forward?
>
>I'm about ready to go back to NAPA and get another master cylinder. This one
>is only 3 months old but there is a possibility that its leaking past the
>seals.
>
>Emery Stora
>77 Kingsley
>Santa Fe, NM
>
>
Tom & Marg Warner
Vernon Center NY
1976 palmbeach
"The beautiful Mohawk Vally"