The Mitsubishi Pajero Owners Club®

sparklelard · Posted: Wed Nov 22, 2006 13:25 Post subject: Siezed Brakes

Has anyone got a step-by step faq for re-furbishing siezed brake cylinders.

My offside rear seized on - with a vengance - today. I had to get my paj recovered as it wouldn't budge an inch.

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cornishman · Posted: Wed Nov 22, 2006 14:16 Post subject:

Same problem as I had a little while back. The garage stripped the caliper after getting a refurb kit, but then found the rust had penetrated the piston bore too deeply for a refurb.
I ended up, after picking myself off the floor after a Mitsi dealer quote, posting my request on www.thepartsgateway.co.uk for a rear caliper and Dalcrue Salvage came back with a guaranteed good caliper. Worked a treat for £40 inc postage.

sparklelard · Posted: Wed Nov 22, 2006 14:20 Post subject:

I don't think it's rusty, but I think the dust seals have gone and it's full of rubbish.

PeteMillis · ***** Joined: 08 Jul 2003 Posts: 845 Location: Sussex, UK

This often works:
Lift caliper up.
Lift rubber dust boot with screwdriver and spray in a load of penetrating oil (WD40, GT85 or similar) to flush *beep* out.
Squeeze piston in with a big pipe wrench.
Pump piston back out a bit with brake pedal (have a second person to watch so you don't pump it out too far).
If piston won't budge in or out, rotate it using a mole wrench, relube, rotate, squeeze in, pump out.
Repeat.
This usually works - and costs nothing except perhaps half an hour of your time.

Pete Millis from Brighton with the once sticky and now slippy piston..

sonic-1 · Posted: Wed Nov 22, 2006 18:08 Post subject: brakes

never ever use wd40 or penitrating oil it causes the seal rubbers to swell causing piston to stick , only thing is a good silicone lube it wont damage the rubbers

PeteMillis · ***** Joined: 08 Jul 2003 Posts: 845 Location: Sussex, UK

Oooeerr - better keep me fingers crossed - so far me rubbers seem alright and GT85'd the piston last winter to unstick it. I wonder if it's ok because I only used the GT85 the clean the *beep* out then lubed the piston with my silicon spray? I have got another part that gets very swollen on a regular basis and I've never sprayed GT85 on it.....

Pete Millis from Brighton, with bits not currently swollen...

wrc · Posted: Wed Nov 22, 2006 20:31 Post subject:

lol

sparklelard · Posted: Thu Nov 23, 2006 10:05 Post subject:

Can you use copper grease instead of the silicon?

sonic-1 · Posted: Thu Nov 23, 2006 22:01 Post subject: brakes

no cooper grease contains oils n normal grease as a base so will expand n rott rubber to
only thing that wont affect rubber is silicone grease , all brake calipers r built usein this stuff
i found this out the hard way my self , had seized brake cleaned caliper with wd40 still was stiff so striped it out to clean , once all clean whent to reassemble to find all rubber parts had grown n wouldnt fit , so got rebuild kit n old bloke at the parts shop said go to plumbers shop n reasemble with silicone grease as it wont swell the rubber