Brake bleeding

tomasnc · **Posted:** Wed Oct 16, 2019 1:16 pm

I replaced the rear calipers and used a pneumatic fluid bleeder to drain the oil fluid and remove any trapped air.

I'm still getting a spongy pedal.

How much fluid does it take to clear the system.

I didn't allow the master cylinder tank to run dry.

Thanks,

Tom

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WWDiesel · **Posted:** Wed Oct 16, 2019 1:39 pm

tomasnc wrote:

I replaced the rear calipers and used a pneumatic fluid bleeder to drain the oil fluid and remove any trapped air.
I'm still getting a spongy pedal.
How much fluid does it take to clear the system.
I didn't allow the master cylinder tank to run dry.
Thanks,
Tom

About a half a pint should be more than sufficient.
Did you bleed the fronts?
Have you tried bleeding them with someone pumping up the pedal and then letting you bleed it down at the caliper?

Also, you did install the calipers on the *correct sides? Bleed valves should be at the top of the housings.
(*don't laugh, I actually saw a mechanic do this on some front calipers years ago when I was a Shop Foreman and they will never bleed out properly)

tomasnc · **Posted:** Wed Oct 16, 2019 2:19 pm

I replaced rear only. Bleeders are on top. I'm using the pneumatic bleeder only.

Do I need to bleed the front even when I didn't open that system?

Thank you,

Tom

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tomasnc · **Posted:** Wed Oct 16, 2019 5:51 pm

I'm wrong. They are installed wrong. There's an air pockets in the chamber? After I read your post I went and looked. :banghead:

I'm always taking a photo of areas I'm unsure of. I didn't take one here.

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GordnadoCRD · **Posted:** Wed Oct 16, 2019 6:20 pm

If your bleeder is on the bottom, there is no way for the air to get out, as it's above the fluid level.
Bleeders have to be on top for the fluid to push it out and replace it.

tomasnc · **Posted:** Wed Oct 16, 2019 9:04 pm

GordnadoCRD wrote:

If your bleeder is on the bottom, there is no way for the air to get out, as it's above the fluid level.
Bleeders have to be on top for the fluid to push it out and replace it.

This problem will be remedied tomorrow morning.

Thanks guys !!!

Tom

tomasnc · **Posted:** Thu Oct 17, 2019 11:10 pm

It's amazing what flipping those calipers over did [THUMBS UP SIGN][THUMBS UP SIGN][THUMBS UP SIGN]. Back to normal.

Thanks guys,

Tom

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