Any tricks for bleeding ABS?
I installed new callipers, bled and topped up the reservoir. I'm getting a
steady stream from the bleeder but the pedal goes to the floor with the
engine running. I can pump the brakes for a little pressure but it goes to
mush as soon as I take my foot off the brake.
Any ideas?
-Brian

 

'92 XJ if that makes a difference.
-Brian

"Cherokee-LTD" <spammenot@home.com> wrote in message
news:S7tUa.49205$vz%.37696@news01.bloor.is.net.cab le.rogers.com...
: Any tricks for bleeding ABS?
: I installed new callipers, bled and topped up the reservoir. I'm getting a
: steady stream from the bleeder but the pedal goes to the floor with the
: engine running. I can pump the brakes for a little pressure but it goes to
: mush as soon as I take my foot off the brake.
: Any ideas?
: -Brian
:
:

 

Hi Brian,
In the future do not have the engine running while bleeding. You
can bleed your brakes normally if you discharge the two thousand pounds
stored in your accumulator, by pumping the brake peddle some twenty
times. If you don't have access to a pressure bleeder than you may get
away with letting gravity fill the calipers just by opening their
bleeders and keeping the reservoirs full and watching for it to begin to
run out. Then close them hoping you have previously pumped air bubbles
into the system. Then pump very slowly and hold and bleed with every
bleed, hoping you haven't thrown the proportional valve to shut off the
front calibers and turned on that light. When you have peddle again the
ABS should be lit detecting a leak, disconnect the battery for a while
to clear that error. If the proportional valve light is still lit, bleed
the rear axle again and watch for the light to blink, then you'll know
to go to the front and bleed very slowly and have the guy holding the
peddle scream when it goes out so you may instantly shut it off.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Cherokee-LTD wrote:
>
> Any tricks for bleeding ABS?
> I installed new callipers, bled and topped up the reservoir. I'm getting a
> steady stream from the bleeder but the pedal goes to the floor with the
> engine running. I can pump the brakes for a little pressure but it goes to
> mush as soon as I take my foot off the brake.
> Any ideas?
> -Brian

 

Thanks Bill,
The engine wasn't running when I bled them - that was afterwards while
testing.
I bled them conventionally...
1. top up the reservoir
2. "pump it up"
3. "hold it"
4. open the bleeders/close the bleeders
....repeat as necessary.
It feels like an air cavity in the callipers... I'm wondering if I should
have topped up the calliper before putting the brake line on. It pees a
steady stream, no air and a decent pedal until you have it running.
-Brian

"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F22D02E.13E10BA1@***.net...
: Hi Brian,
: In the future do not have the engine running while bleeding. You
: can bleed your brakes normally if you discharge the two thousand pounds
: stored in your accumulator, by pumping the brake peddle some twenty
: times. If you don't have access to a pressure bleeder than you may get
: away with letting gravity fill the calipers just by opening their
: bleeders and keeping the reservoirs full and watching for it to begin to
: run out. Then close them hoping you have previously pumped air bubbles
: into the system. Then pump very slowly and hold and bleed with every
: bleed, hoping you haven't thrown the proportional valve to shut off the
: front calibers and turned on that light. When you have peddle again the
: ABS should be lit detecting a leak, disconnect the battery for a while
: to clear that error. If the proportional valve light is still lit, bleed
: the rear axle again and watch for the light to blink, then you'll know
: to go to the front and bleed very slowly and have the guy holding the
: peddle scream when it goes out so you may instantly shut it off.
: God Bless America, ßill O|||||||O
: mailto:-------------------- http://www.----------.com/
:
: Cherokee-LTD wrote:
: >
: > Any tricks for bleeding ABS?
: > I installed new callipers, bled and topped up the reservoir. I'm getting
a
: > steady stream from the bleeder but the pedal goes to the floor with the
: > engine running. I can pump the brakes for a little pressure but it goes
to
: > mush as soon as I take my foot off the brake.
: > Any ideas?
: > -Brian

 

Sounds like some of the air pocket moved to the rear axle. You do
have the calibers on their right sides? The bleeder is at the cylinder's
top, right?
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Cherokee-LTD wrote:
>
> Thanks Bill,
> The engine wasn't running when I bled them - that was afterwards while
> testing.
> I bled them conventionally...
> 1. top up the reservoir
> 2. "pump it up"
> 3. "hold it"
> 4. open the bleeders/close the bleeders
> ...repeat as necessary.
> It feels like an air cavity in the callipers... I'm wondering if I should
> have topped up the calliper before putting the brake line on. It pees a
> steady stream, no air and a decent pedal until you have it running.
> -Brian

 

there is a left and right pad and there is a good chance they are bacwards

Cherokee-LTD wrote:

> '92 XJ if that makes a difference.
> -Brian
>
> "Cherokee-LTD" <spammenot@home.com> wrote in message
> news:S7tUa.49205$vz%.37696@news01.bloor.is.net.cab le.rogers.com...
> : Any tricks for bleeding ABS?
> : I installed new callipers, bled and topped up the reservoir. I'm getting a
> : steady stream from the bleeder but the pedal goes to the floor with the
> : engine running. I can pump the brakes for a little pressure but it goes to
> : mush as soon as I take my foot off the brake.
> : Any ideas?
> : -Brian
> :
> :

 

Thanks for your help Bill...
I don't know what the problem was but it's fixed now. I pulled the callipers
off, lay them down, pre-loaded them and put the lines back on. Then I bled
front and rear. Brakes feel like new now!
-Brian

"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:3F230469.EAA16639@***.net...
: Sounds like some of the air pocket moved to the rear axle. You do
: have the calibers on their right sides? The bleeder is at the cylinder's
: top, right?
: God Bless America, ßill O|||||||O
: mailto:-------------------- http://www.----------.com/
:
: Cherokee-LTD wrote:
: >
: > Thanks Bill,
: > The engine wasn't running when I bled them - that was afterwards while
: > testing.
: > I bled them conventionally...
: > 1. top up the reservoir
: > 2. "pump it up"
: > 3. "hold it"
: > 4. open the bleeders/close the bleeders
: > ...repeat as necessary.
: > It feels like an air cavity in the callipers... I'm wondering if I
should
: > have topped up the calliper before putting the brake line on. It pees a
: > steady stream, no air and a decent pedal until you have it running.
: > -Brian

 

Cool.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Cherokee-LTD wrote:
>
> Thanks for your help Bill...
> I don't know what the problem was but it's fixed now. I pulled the callipers
> off, lay them down, pre-loaded them and put the lines back on. Then I bled
> front and rear. Brakes feel like new now!
> -Brian