Hi, I have just purchased an 81 moke that has been sitting for 15 years. Front disc pistons seem clean but stuck, any advice on freeing them up?
Cheers,
Steve

penetrating oil (not WD40) overnight to start with.

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates

Don't use compressed air unless you wrap them in rag first. I use a grease nipple in hose hole, pump them out......easy.

thanks for that

2nd the grease gun approach works a treat usually

Matt

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Its ok to get grease inside?

You will need to clean it all out to put in new seals (and pistons perhaps) anyway.

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the world is a book, and those who do not travel read only a page
66 Mini Minor sponsored by http://www.lifeonthehedge.com.au/ The Dog Harness Specialists
It was a pleasure ausmini. I'll miss all you misfits and reprobates

and new pads...

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"Show me the Mini!"

Pads look brand new

I would assume they'd need overhauling anyway if they're seized. If the pads are newish, just give them a linish and brake cleaner.

often the pistons are just "cocked" from some dork pulling them back in wrong to effect replacement pads
but most times they`re jammed from grit & rust & crap & years of "lack of maintenance"

grease gun is the go,,, modify the end to fit a brake fitting & Bob`s your Aunt

clean them all out & fit new seals etc & away you go
easy-peasy

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

You should put your heart & soul into everything you do.

Watch your fingers if using air.

Not worth reusing if they happen to get contaminated with grease or other fluids

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"Show me the Mini!"

Clean the pistons with steel wool or wet & dry paper and inspect.
If the chrome is pitted on the outside, buy new ones.

Originals have a flat machined across the open end, this goes to the top of caliper when assembled. New aftermarket pistons don't seem to have this.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Thanks Doc, will be giving it all a go on the weekend, and also seeing if I breath life into this moke after sitting for 15 or so years!