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Gravity bleed brakes [message #83082] Tue, 04 May 2010 20:46 Go to next message
pzerkel is currently offline  pzerkel   United States
Messages: 212
Registered: September 2007
Location: Salisbury, IL
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Senior Member
If one were to gravity bleed brakes, should all six bleeders be opened at once? Or should it be done one at a time, in the order called out in the shop manual.

How long (in minutes or hours) should each bleeder be left open?

IF it can be done sequentially, must they all be done immediately after each other, or can some period of time (say 24 hours) transpire between doing the right rear and left rear wheels, and then the fronts.

I do understand that the master cylinder must be kept full of fluid while gravity bleeding. I also understand when bleeding the fronts, the button on the combo valve needs to be pressed.

If it is not obvious I've never had the "opportunity" to bleed brakes myself (always paid someone else) in the first 45 years of life.

Thanks.


Paul Zerkel
'78 Eleganza II
Salisbury IL (near Springfield)
Re: Gravity bleed brakes [message #83083 is a reply to message #83082] Tue, 04 May 2010 21:02 Go to previous messageGo to next message
Craig Lechowicz is currently offline  Craig Lechowicz   United States
Messages: 541
Registered: October 2006
Location: Waterford, MI
Karma: 0
Senior Member
Paul wrote:
>If one were to gravity bleed brakes, should all six bleeders be opened at once? Or
> should it be done one at a time, in the order called out in the shop manual.
>How long (in minutes or hours) should each bleeder be left open?

Paul,
Not sure what the "right" way is, but I have done mine with all six open at once. (fronts and rears are separate anyway) and left the screws open for several hours (maybe 3?). And, it seemed to work pretty well. You do want to check a couple of times to make sure you don't run the master cylinder dry, or you get to start over again. Jacking the front end of the coach up, and leaving the master cylinder cover loose both help.


Craig Lechowicz
'77 Kingsley, Waterford, MI
Re: [GMCnet] Gravity bleed brakes [message #83087 is a reply to message #83082] Tue, 04 May 2010 21:23 Go to previous message
Mr ERFisher is currently offline  Mr ERFisher   United States
Messages: 7117
Registered: August 2005
Karma: 2
Senior Member
do one at a time
farthest one away (right rear)
bleed until the bubbles stop
then close and go to the next one

gene




On Tue, May 4, 2010 at 6:46 PM, Paul Zerkel <gmc2@zerkelhome.com> wrote:

>
>
> If one were to gravity bleed brakes, should all six bleeders be opened at
> once? Or should it be done one at a time, in the order called out in the
> shop manual.
>
> How long (in minutes or hours) should each bleeder be left open?
>
> IF it can be done sequentially, must they all be done immediately after
> each other, or can some period of time (say 24 hours) transpire between
> doing the right rear and left rear wheels, and then the fronts.
>
> I do understand that the master cylinder must be kept full of fluid while
> gravity bleeding. I also understand when bleeding the fronts, the button on
> the combo valve needs to be pressed.
>
> If it is not obvious I've never had the "opportunity" to bleed brakes
> myself (always paid someone else) in the first 45 years of life.
>
> Thanks.
> --
> Paul Zerkel
> '78 Eleganza II
> Salisbury IL (near Springfield)
> _______________________________________________
> GMCnet mailing list
> List Information and Subscription Options:
> http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
>



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