front brakes

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gstuart

D3 Grandad
Full Member
Posts
29,712
Location
Kent
was well pleased today garage dropped my car off with a passed mot

but then noticed the front wheels smoking , dam the calipers or pins must be sticking

got to now strip them down , the lh caliper is around 3 x years old ,

I don't think I put new pins in , fingers crossed that's all it is , think new calipers are around £80 each , don't know how much new pins are

really hope it's not , lol
 
then it should not have passed the test as they do not size up just like that.

trouble is the car sits there sometimes weeks on end

was out in it yesterday and didn't feel like they were sticking or holding back , as after I got home no smoke was coming off the brakes

something has gone amiss somewhere , going to strip them down sunday and see what's going on

is very strange as I would have noticed it before hand

just looking online to see how much new pins are and I think the originals are still fitted? can't even remmeber if the pins need coppaslip or not

the old memory going ,lol
 
Still should not have passed an mot:D

Mine passed the mot with 2x rattling track rod ends!!!:eek: how they missed them I have no idea? Mind you the Mot only costs £30 and takes them 30 mins to do???:mil92:

Good job I regular do all my own maintanence..... MOTs are a JOKE IMHO its pot luck if you pass or not.
 
Don't use copper grease on the pins as there's a rubber sleeve on them which swells up do to the copper grease and causes the caliper not to slide anymore.

That could be the cause of your problem if you've already copper greased them.

Only use the proper grease that should be supplied with the new pins
 
Don't use copper grease on the pins as there's a rubber sleeve on them which swells up do to the copper grease and causes the caliper not to slide anymore.

That could be the cause of your problem if you've already copper greased them.

Only use the proper grease that should be supplied with the new pins

This^^^^. One of the slide pins has a rubber anti rattle section. This will swell if you lubricate it will an oil based lubricant. You should only use silicone grease on rubber. The slider pin without the rubber band can be lubricated with an oil based lubricant though. I find CV joint grease works really well for the plain slider pins.
 
excellent , thks so much guys for the great help as always

am going to order some new pins , so when I strip the brakes down will have them ready to go in ,

will let u know how i get on

for the life of me can't remember if I jsed coppaslip or not so will use the silocone grease that comes with it

might have some when I fixed boilers and used it on o rings etc just in case I need a little extra

bit annoying really, but least the gearbox and mot is sorted so this should be the third thing, lol

cheers
 
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happy days, got the pins off the local dealer and also bought a little tub of silicone grease

all ready for the weekend

plse let there be sunshine , lol

had a wander around the showroom , the disco 4 looks really nice, saw the new discovery , not keen on the small back window , nice to dream ,
 
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stripped the brakes down , hoses all ok

both caliper Pistons are sticking , one side has split in the seal

will do both sides

going to buy a piston and seal rebuild kit, will have to wait a few weeks , finances , just hope I can get it done before the lz event , but will buy genuine as I don't wish to take any risk with the brakes

will cost around £40 quid per side to rebuild , with new Pistons and seals

what grease did u guys use please when u rebuilt ur calipers

read through the posts but couldn't find which grease u used on the Pistons

put new bleed nipples onto the calipers as the old ones didn't look very good, no air and the brake fluid was replaced throughout last year

plus with both front wheels up , handbrake on, in park turned front wheels and the prop doesn't turn , as i was just worried the prop would turn , but didn't

plus replaced pins, the others were jammed on the bottom

pads and discs were replaced last year with genuine ones so are fine
 
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I did my caliper rebuilds and guide pins earlier this year. Not too bad a job, even on the driveway in January. ..:)

I removed the caliper and tied it up then pumped the brake pedal a few times to start pushing the piston out. Once I'd got it to a certain point I clamped the hose, disconnected it, drained anyfluid I could out of the caliper then used a foot pump with a plastic air bed adapter to pump the piston outthe rest of the way. This seemed to provide an adequate seal if I kept my hand on it ;)

Once cleaned up the new piston goes in quite easily. Just make sure you get the seal to bed in properly. It took me a few attempts! I didn't use any grease on the pistons, just smeared some brake fluid round them on insertion.
 
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I did my caliper rebuilds and guide pins earlier this year. Not too bad a job, even on the driveway in January. ..:)

I removed the caliper and tied it up then pumped the brake pedal a few times to start pushing the piston out. Once I'd got it to a certain point I clamped the hose, disconnected it, drained anyfluid I could out of the caliper then used a foot pump with a plastic air bed adapter to pump the piston outthe rest of the way. This seemed to provide an adequate seal if I kept my hand on it ;)

Once cleaned up the new piston goes in quite easily. Just make sure you get the seal to bed in properly. It took me a few attempts! I didn't use any grease on the pistons, just smeared some brake fluid round them on insertion.

bless u for that and very helpful

made me realise I've got a clarke starter u it with a built in compressor and may be ideal to push the Pistons out

u say the Pistons go in dry , so no grease is required at all then , got some silicone grease for the rubber seals or is it better to use the brake fluid

actually found my brake pipe clamps , so I can remove it as I've got a vice in my shed , can then sit down and take my time , lol

thks again for the great help
 
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bless u for that and very helpful

made me realise I've got a clarke starter u it with a built in compressor and may be ideal to push the Pistons out

u say the Pistons go in dry , so no grease is required at all then , got some silicone grease for the rubber seals or is it better to use the brake fluid

actually found my brake pipe clamps , so I can remove it as I've got a vice in my shed , can then sit down and take my time , lol

thks again for the great help

No, he said he smeared brake fluid on them, keep the grease for the pins.
 
No, he said he smeared brake fluid on them, keep the grease for the pins.


sorry my fault as I didn't word it very well ,

so as said just use the brake fluid to lubricate the piston and not put any grease and just use that only for the pins

apologises once again
 
Yes, brake fluid on the pistons.

I wouldn't use a compressor to push the pistons out, you'll fire them across the workshop:eek: Footpump and a suitable adapter is all you need.

You may want to loom on YouTube for a few tips on how best to get the seal in position. It sort of has to go on the insertion end of tne piston In such a way that it's going to slot into position when the piston reaches its fully retracted point. Tricky to explain! You may also want a couple of spare seals as they are quite delicate on the concertina bit.
 
Yes, brake fluid on the pistons.

I wouldn't use a compressor to push the pistons out, you'll fire them across the workshop:eek: Footpump and a suitable adapter is all you need.

You may want to loom on YouTube for a few tips on how best to get the seal in position. It sort of has to go on the insertion end of tne piston In such a way that it's going to slot into position when the piston reaches its fully retracted point. Tricky to explain! You may also want a couple of spare seals as they are quite delicate on the concertina bit.

cheers about the utube videos , good idea

always prefer to ask first, can see how the old ones comes apart and how the seals fit

fingers crossed once the brakes are done , just got the CB to fit and it should then be all done and finished

famous last words :D:D

will try and take some pics in stages of replacing the seals and Pistons as it may help others and always like to share info

know im going to wire brush them down first, get them spotlessly clean and give them a coat of hammerite as I've got a new tin of black hammerite straight to rust

thks again everyone for the great help
 
I will give you a tip
To refit piston with new seal with existing dust seal.
find a spray can lid and cut plastic end out and remove any burs, fold into 4 and open inside dust seal- slide piston down easily and remove plastic.
 
I will give you a tip
To refit piston with new seal with existing dust seal.
find a spray can lid and cut plastic end out and remove any burs, fold into 4 and open inside dust seal- slide piston down easily and remove plastic.

u clever sod, the same type of idea u do with a piston and a sleeve

nice one mate I like that idea

that deserves a pint at the lz event for that, :D:D

thks again
 
u clever sod, the same type of idea u do with a piston and a sleeve

nice one mate I like that idea

that deserves a pint at the lz event for that, :D:D

thks again

;) saves splitting dust seal with screwdriver etc
 
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