Don't use compressed air unless you wrap them in rag first. I use a grease nipple in hose hole, pump them out......easy.
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| advice on freeing up disc pistons https://www.ausmini.com/forums/viewtopic.php?f=2&t=92224 |
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| Author: | mooman10_0 [ Mon Mar 28, 2016 4:30 pm ] |
| Post subject: | advice on freeing up disc pistons |
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 |
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| Author: | mickmini [ Mon Mar 28, 2016 4:45 pm ] |
| Post subject: | Re: advice on freeing up disc pistons |
penetrating oil (not WD40) overnight to start with. |
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| Author: | peterb [ Mon Mar 28, 2016 5:08 pm ] |
| Post subject: | Re: advice on freeing up disc pistons |
Don't use compressed air unless you wrap them in rag first. I use a grease nipple in hose hole, pump them out......easy.
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| Author: | mooman10_0 [ Mon Mar 28, 2016 5:23 pm ] |
| Post subject: | Re: advice on freeing up disc pistons |
thanks for that
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| Author: | TheMiniMan [ Mon Mar 28, 2016 6:22 pm ] |
| Post subject: | Re: advice on freeing up disc pistons |
2nd the grease gun approach works a treat usuallyMatt |
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| Author: | mooman10_0 [ Mon Mar 28, 2016 6:28 pm ] |
| Post subject: | Re: advice on freeing up disc pistons |
Its ok to get grease inside? |
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| Author: | mickmini [ Mon Mar 28, 2016 7:47 pm ] |
| Post subject: | Re: advice on freeing up disc pistons |
mooman10_0 wrote: 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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| Author: | 9YaTaH [ Tue Mar 29, 2016 7:16 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
and new pads... |
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| Author: | mooman10_0 [ Tue Mar 29, 2016 7:48 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
Pads look brand new
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| Author: | peterb [ Tue Mar 29, 2016 8:15 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
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. |
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| Author: | TheMiniMan [ Tue Mar 29, 2016 8:23 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
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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| Author: | Fishyoil [ Wed Mar 30, 2016 12:10 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
Watch your fingers if using air. |
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| Author: | 9YaTaH [ Wed Mar 30, 2016 6:34 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
mooman10_0 wrote: Pads look brand new Not worth reusing if they happen to get contaminated with grease or other fluids 
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| Author: | drmini in aust [ Wed Mar 30, 2016 8:59 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
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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| Author: | mooman10_0 [ Wed Mar 30, 2016 9:01 am ] |
| Post subject: | Re: advice on freeing up disc pistons |
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! |
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