RWAL Brake Bleed Question

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Curmudgeon - 23 Dec 2006 15:51 GMT

I replaced the booster unit and am bleeding out the system, but have
never done a truck with RWAL before (97 Dakota).
When I got to the left rear, an ounce or two of fluid came out (using a
Mityvac vac pump...not pedal pushing)...then nothing.
According to the shop manual, the little ball bleed valve on the end of
the RWAL valve do not need to be open when using a vacuum method.
So what's the problem?
Do I need to bleed the combo valve and the RWAL valve, and if so, can
that be done with a mityvac? (don't have someone around to pump the
brake pedal.) I did not bench bleed the master cylinder before putting
back onto the new booster.
Any advice would be appreciated.
Thanks Guys!

Gary

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Tom Lawrence - 23 Dec 2006 19:15 GMT

> Do I need to bleed the combo valve and the RWAL valve, and if so, can that
> be done with a mityvac? (don't have someone around to pump the brake
> pedal.)

You're going to have to get someone - either that, or rest something heavy
on the brake pedal. The only way to bleed the combo and RWAL valves is to
crack open the line fittings.

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Stormin Mormon - 27 Dec 2006 01:34 GMT

My auto parts store has a "one man brake bleeder kit". Has a
screw cap thing that looks like a kid's sippy cup. Holds about
six ounces. After some fluid fills the cup, when you let off the
pedal it draws fluid back in, not air.

Before that, I'd push the pedal down and jam a snow brush between
the pedal and the front seat.

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> You're going to have to get someone - either that, or rest something heavy
> on the brake pedal. The only way to bleed the combo and RWAL valves is to
> crack open the line fittings.

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