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Drum Brakes - Handbrake - Low Efficiency - Causes?

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Old 08-11-2008, 07:03 PM
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Lee_R21Turbo
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Default Drum Brakes - Handbrake - Low Efficiency - Causes?

Basically had a mates mums Saxo in for repair today (just another excuse to use my ramps! LOL). She'd come out one morning last week to find a big patch of fluid down one rear wheel & all over the floor.

When I took it apart & I found that the friction material and clean come away from both the shoes in one of the rear drums causing the pistons to pop out the wheel cylinder & piss fluid past the seals.

So after cleaning up all the fluid, changing the shoes on both sides & replacing the leaking wheel cylinder (arent the springs a PITA to do on drum brakes! lol) I bled the system up - did all four corners - system was full of air it seemed.

Anyway I came to adjust the handbrake - set it to around 3/4 clicks.

Now comes the odd part - I can remember having my old Saxo donkeys years ago and I used to be able to yank the handbrake up & lock the rear wheels up no problem at any speeds lol - but on this Saxo even on stones outside my lockup the rear wheels wouldnt lockup when I put the handbrake on.

Could it be that the rear pads need to be bedded in properly first (I wouldnt of thought so mind) - what else could it be?
Old 08-11-2008, 07:06 PM
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Steven_RW
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Hi matey - I was thinking that the faces of the pads and the inner drum probably need to mate to each other. Give it a little while - u could check that u have put it back together corret and that the handbrake mechanism really is moving the right parts in the right way

gl

RW
Old 08-11-2008, 07:14 PM
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Fudgey
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make sure the hb mech is not seized, as is on most lol.

secondly, was there any fluid on the inside of the drum? if so, was it cleaned off properly?

i done the rear shoes on my missus old clio, that thing would do handbrake tunrs like a demon after
Old 08-11-2008, 07:15 PM
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kev 3dr
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Lee just probabley need bedding in mate by the sounds of it as long as the cables were free and drum free from brake fluid contamination !!!!
Old 08-11-2008, 07:23 PM
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Lee_R21Turbo
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Originally Posted by Steven_RW
Hi matey - I was thinking that the faces of the pads and the inner drum probably need to mate to each other. Give it a little while - u could check that u have put it back together corret and that the handbrake mechanism really is moving the right parts in the right way

gl

RW
Handbrake mechanism defo workin fine mate checked that.

Originally Posted by Fudgey
make sure the hb mech is not seized, as is on most lol.

secondly, was there any fluid on the inside of the drum? if so, was it cleaned off properly?

i done the rear shoes on my missus old clio, that thing would do handbrake tunrs like a demon after
HB mechanism not siezed in the drum as the new shoes came with new handbrake levers. Not seized anywhere else either watched it move & release freely.

All fluid cleaned off perfectly prior to refitting - its doing it on both sides not just the one that was leaking.

Could the handbrake cables be stretching rather than applying properly?
Old 08-11-2008, 07:40 PM
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Lloyd
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release the handbrake cable adjuster right off,then readjust the brake shoes out,then readjust the cable tension.
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