[tcb] Re: air in the mc
- From: Brian Denning <i_am_cool_fred@xxxxxxxxxxx>
- To: <tcb@xxxxxxxxxxxxx>
- Date: Mon, 10 Mar 2008 12:36:58 -0500
i think i may just undo both bleeder screws and gravity bleed 'em over night.
one guy told me that you can get all teh air out of the lines and still have a
little air in the mc...i still am leaning towards sammies second suggestion of
adjusting the plunger at the pedal cause when i mash the brakes sometimes the
pedal goes to the floor but, it's enough braking power to slow you down, just
not enough to stop you. the plunger was never adjusted when i put in the
rebuilt mc that i did back in august. and the brakes really haven't been right
since then either. so that will be where i start tonight is with the plunger
then i will go from there.
i adjusted all brakes till the slightly rubbed then i bled the brakes at all
four corners starting with the right rear till all air came out. and new fluid
started comin gout of the lines as well. i've been trying my damnedest to avoid
buying a new master cylinder but it is starting to look inevitable.
i'll look in bently tonight to see how to adust the plunger and go from
there...i'm fine with alot of brake pedal travel as long as it stops the bus.
From: coocoo@xxxxxxx
To: tcb@xxxxxxxxxxxxx
Subject: [tcb] Re: air in the mc
Date: Mon, 10 Mar 2008 12:24:23 -0500
I had the same problem. New shoes, new wheel
cylinders, bled properly, and yet I would need to pump the brakes. The
inspection of the drums showed very little wear and no grooves or ridges. Chuck
kept telling me that I needed to have the drums turned because they were
probably ovalled. I did not feel a whole lot of pulsing, but to shut him up I
had the drums turned. The difference was, and is, amazing Less than two inches
of play and no fading. My brakes have never been this good in Murrays long
history.
If you haven't had the drums turned, do it. You've
got nothing to lose.
----- Original Message -----
From:
sammie smith
To: tcb@xxxxxxxxxxxxx
Sent: Monday, March 10, 2008 12:14
PM
Subject: [tcb] Re: air in the mc
If you have the brakes completely bled there can be no air in
the master cylinder. If the master cylinder holds when you first press
on it but then slowly goes down with the pedal but then will pump back up
when
you hit the pedal again you may have a master cylinder that is leaking
fluid by the piston. Solution is a new master cylinder. If
you have low pedal on first application but can then pump the brakes up; in
my
opinion you have air in the system and you haven't completely bled the
system. Make sure you have plenty of fluid in the reservoir. Also:
not sure how it works on a bay, but the earlier busses and bugs have an
adjustment in the plunger to the master cylinder from the pedal. If this
is not properly adjusted it will give you the impression of low pedal that
you
can pump up. I'm open to suggestions from other master VW
mechanics.
Brian Denning
<i_am_cool_fred@xxxxxxxxxxx> wrote:
the brakes have been bled 4 times now, i still have to pump it up for them
to work, that is why i think there is air in the master cylinder, i don't
think it's bad because there are no leaks. i understand i need to bleed the
wheels and have gotten very experienced in that the past couple of days,
there isn't any air comming out of the wheels now. i was just wondering
about the master cylinder, how do i get the air out of it? is there any
trick to it?
Date: Mon, 10 Mar 2008 09:59:45 -0700
From:
bugcollections@xxxxxxxxxxxxx
Subject: [tcb] Re: air in the mc
To:
tcb@xxxxxxxxxxxxx
Bleed the brakes: In this order; right
rear, left rear, right front, left front. Use the method recommended
in all the VW handbooks and you can do the job by yourself, though it is
helpful to have someone work the pedal while you watch the fluid to make
sure all bubbles have stopped coming out. If you don't have a manual
showing this procedure holler back and I will describe
it.
Brian Denning <i_am_cool_fred@xxxxxxxxxxx>
wrote:
that is the concensus on the master cylinder. any tricks to bleeding it
with it installed? just unhook the hose and pump away or what?
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