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Old 15-03-14, 02:44 PM   #1
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Default Internal leak in rear caliper?

Changed the right rear wheel bearing today (silly enough turned out to be the left that's making the noise!!).

Anyway after I did this, the brake pedal is not acting normal, and the handbrake does not work on the right rear caliper. What is strange is that the pedal goes to the floor, but no external leak is visible, and the fluid level in the reservoir is stable and nice, but to keep the brake power up I need to pump brake.

I'll have to go and change the left bearing soon and take a look at it, but is the hydraulics and handbrake mechanism connected on these calipers? I though the handbrake was entirely mechanical, and the fluid was not related to this?
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Old 15-03-14, 02:47 PM   #2
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Wen i changed my rear pads i had a similar problem afterwards. I reset the handbrake cable in the centre console. Its a completely auto adjust handbrake, i just lifted the ratchet and let it adjust its self up. Wen ratchet is loose pump brake pedal to get pads back on the disc then use the handbrake, took a couple of applications with the handbrake to adjust t back to 1,2 clicks.

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Old 15-03-14, 03:11 PM   #3
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Did you also have problems with brake pedal going to the floor, or just handbrake not working?
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Old 15-03-14, 05:08 PM   #4
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Pedal travel was worse until i reset handbrake. The brakes still worked but didnt feel right

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Old 15-03-14, 05:48 PM   #5
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Ok. Will have to do some investigation tomorrow, but I must say it is really strange that pedal performance is affected by the mechanical part of the braking system.

Thumbs down to Peugeot on that one.
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Old 16-03-14, 03:30 PM   #6
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Changed the other wheel bearing today, and noise is gone

I took of the right caliper again, and it is quite strange this one.

Yesterday I wound the caliper piston 1 round inwards, and today when I took off the wheel, there was 3mm slack between the caliper and the brake pads.

And it did not help if I went to pump the pedal, went back and still the same slack.

Wound the piston out 1 turn again and managed to get it on. Now pedal feels much better (more or less like before).

I'm starting to think that the handbrake is working good, but maybe I after all have some problems with my ABS unit. As the pedal creeps to the bottom quite fast when pressed hard during idling stand still.

Also pads on left side was much more worn than on right side..

Used ABS unit next maybe.
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Old 16-03-14, 03:36 PM   #7
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Rear calipers are not the best on these to be honest we have had to replace at least 6 on our taxis (same calipers as 407) for various reasons but mainly leaking at the handbrake lever.

Sometimes we do need to do as 407xjr says and release cable adjuster then re adjust to get handbrake to behave.
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Old 16-03-14, 03:47 PM   #8
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Ok. I didn't manage to find any leaks on mine though.
So it seem to work ok enough now, but hydraulic pressure at the caliper seem to be too low.

So I still guess there might be something fishy with the ABS unit. I've been struggling with this strange pedal behaviour for a long time.
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Old 16-03-14, 03:52 PM   #9
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Try bleeding just that caliper see if you have pressure might be a sticky valve in the ABS unit.
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Old 16-03-14, 04:03 PM   #10
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Did try a lot of bleeding some months ago, ran through in total 3 litres of fluid, and activated ABS solenoids with PP2000 etc. air was certainly gone, but still funny pedal feeling, and pedal creeping to bottom.

So I think there might be internal leak in ABS unit on the circuit going to right rear caliper.

Sticky valve in ABS unit = change unit I suppose?

Car has now 214k miles on the clock, so could well be.
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