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Author Subject: rear brake bias compensator
24seven

Seasoned Pro

Location: Derby

Registered: 05 Oct 2005

Posts: 6,221

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Post #1
Can someone take a picture of one for me please? just found the actuator rattling on mine with the compensator seized in the fully on position (ie fully compensating for extra weight). I think there's a spring missing from around the actuator, but would like a picture of a working setup to compare, if possible.

Cheers.

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Posted 17th Jul 2008 at 01:26
midlife

Seasoned Pro

Location: Colne, Lancashire

Registered: 13 Mar 2006

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Post #2


Cool

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Posted 17th Jul 2008 at 02:00
24seven

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Location: Derby

Registered: 05 Oct 2005

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Post #3
hmm. looks exactly as mine did. I unseized it and took the actuator off completely, because there was nothing returning it to the off position, and as it goes over bumps it would only end up being sat on full anyway.

there's a big spring pushing the valve into the fuly on position, and a smaller spring pulling it the same way, but I can't see anythin to move it to the off position when the back of the car is unloaded.

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Posted 17th Jul 2008 at 02:12
midlife

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Location: Colne, Lancashire

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Post #4
Its the nut on the end of the shaft at the rhs that moves it to "the off position"

Cool

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Team 330™Cool
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Posted 17th Jul 2008 at 02:15
24seven

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Location: Derby

Registered: 05 Oct 2005

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Post #5
wouldn't it make sense for that nut to be against the other side of the arm when the spring is fully decompressed then? Mine was fully decompressed, with the suspension sitting high (the back of my car seems to ride unusually high for some reason) and it was rattling around, not operating at all.

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Posted 17th Jul 2008 at 02:20
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

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Post #6
not entirely sure how it works but I think hydraulic pressure with the valve unloaded makes it close.

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Posted 17th Jul 2008 at 02:46
24seven

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Location: Derby

Registered: 05 Oct 2005

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Post #7
hmm. that could be it. either way with the spring and rod assembly completely removed from my car the thing handles and drives so much better! For the first time I'm able to feel the passive rear steering of the car, I need less steering input to go round corners than I used to, the car accelerates quicker and the brakes at the front at least) feel more responsive. I wonder if it being stuck on was causing my rear brakes to bind slightly. perhaps now that it's unseized from the fully on position it'll stay like that if I refit the rod/spring gizmos. will try that tomorrow.

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Posted 17th Jul 2008 at 06:10
chris with a pug

Seasoned Pro

Location: Southampton

Registered: 16 Feb 2003

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Post #8
is your car lowered?
If it is you should remove a coil or two big spring to compensate
Posted 24th Jul 2008 at 16:53
buzzbrightyear

Seasoned Pro

Location: hiding all receipts for car

Registered: 09 Jul 2008

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Post #9
chris with a pug wrote:
is your car lowered?
If it is you should remove a coil or two big spring to compensate

i was just about to mention that lowering may alter the brake bias to back wheels but you beat me to it

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Posted 26th Jul 2008 at 14:58
cwspellowe

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Location: Calderbank

Registered: 19 Jul 2009

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Post #10
Mega revival

Erm, just went to free up my compensator and the main rod thing that goes through it appears to be completely missing, just the flappy springy bit there.

I should be concerned, shouldn't i?

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Posted 24th Jun 2011 at 02:09
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

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Post #11
yarp LOL

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Posted 24th Jun 2011 at 02:24
cwspellowe

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Location: Calderbank

Registered: 19 Jul 2009

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Post #12
Crap, where the f*ck could it be?!

Thought it was a bit weird it loosened up easily and went all flappy, couldn't figure out how it was supposed to work Ninja

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Bye bye Sundance Kid Sad
Posted 24th Jun 2011 at 02:25
cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

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Post #13
Erm, spot the difference?



I don't see what anything's supposed to be attached to though?

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Bye bye Sundance Kid Sad
Posted 24th Jun 2011 at 02:46
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

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Post #14
LOL meant to be a bracket on the lower damper bolt.

best get down a scrappy and find a bracket springy thing and rod Thumbs up

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need a part number? get on here - http://public.servicebox.peugeot.com

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Posted 24th Jun 2011 at 02:49
cwspellowe

Seasoned Pro

Location: Calderbank

Registered: 19 Jul 2009

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Post #15
Ahh ya f*cker. Do all 306's have them, even ones with drums?

What's it doing at the minute then? It was seized solid and i worked it free, have I just sent all the bias to the rear now?

EDIT I have also deduced from picture evidence that it appears to have been missing since at least November last year. Could that explain why the brakes have felt shit for a while despite several bleeds?

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Bye bye Sundance Kid Sad
Posted 24th Jun 2011 at 03:00
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline

Post #16
drum cars with ABS have them, and most with discs.

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need a part number? get on here - http://public.servicebox.peugeot.com

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Posted 24th Jun 2011 at 03:03
Lecktorious

aka G.

Location: Edinburgh

Registered: 08 Jan 2009

Posts: 920

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Post #17
306 Meridan in UPI Chris, from memory it's a TU.

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Posted 24th Jun 2011 at 03:27
daveyboy

aka Jim Davey

Location: Southampton

Registered: 01 Oct 2007

Posts: 8,648

Status: Offline

Post #18
No rod = Less/no rear brakes.

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Posted 24th Jun 2011 at 12:27
owain

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Location: Essex

Registered: 20 May 2009

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Post #19
Mate that's pretty funny Yes

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Posted 24th Jun 2011 at 13:06
blondie

Dirty Diesel Pro

Location: WestMids

Registered: 13 Feb 2004

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Post #20
cwspellowe wrote:
Ahh ya f*cker. Do all 306's have them, even ones with drums?
Yep non abs drum models have them tooWink

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Posted 25th Jun 2011 at 04:11
welshpug!

Capt Pedantic

Location: Bigend, Wales.

Registered: 27 Mar 2007

Posts: 25,839

Status: Offline

Post #21
naah, they have inbuilt pressure limiters in the rear wheel cylinders.

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need a part number? get on here - http://public.servicebox.peugeot.com

Bring on the Trumpets.

Posted 25th Jun 2011 at 04:14
phillipm

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Location: Rotherham

Registered: 15 Oct 2006

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Post #22
^^What he said.

No pesky feckin' compensators on mine.

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Posted 25th Jun 2011 at 04:29
cwspellowe

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Location: Calderbank

Registered: 19 Jul 2009

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Post #23
Hmm would explain why the rear brakes have seized up then, lots of rusty patches on the rear discs.

Best get a new rod (snigger) to poke (snigger) the rear brakes into life

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Bye bye Sundance Kid Sad
Posted 25th Jun 2011 at 05:00
smegal

Seasoned Pro

Location: Leeds

Registered: 26 Dec 2005

Posts: 5,940

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Post #24
I hope that you have better luck with yours than I did mine. I ended up with a new one as it was the only way I could get my rear brakes to show on an MOT machine.

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Now in a Megane R26
Posted 25th Jun 2011 at 22:00
pinkfloyd

Senior User

Location: Ellesmere port

Registered: 03 Oct 2006

Posts: 929

Status: Offline

Post #25
Any idea if the rod can be left off on a lowered car. I was wondering if I could lock the compensator into a position that would suit track use?

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Posted 5th Nov 2011 at 07:22

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