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Author: Subject: grease for brake slave cylinders
Mr Whippy

posted on 31/10/17 at 12:30 PM Reply With Quote
grease for brake slave cylinders

Hi,

My old landy as usual has issues with the steel slave cylinder pistons corroding onto the aluminium cylinders which is kind of a design flaw as the bottom ones face up catching water inside and never get hot enough to dry them out. It's a simple fix to clean them up but a complete pain to have to do this regularly, things being quite heavy on it.

Two of the slaves didn't seem to be an issue but I notice they seemed to have some sort of clear grease inside the boot, is this a special type?

The brakes use Dot 4 currently.

Any suggestions? thanks

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r1_pete

posted on 31/10/17 at 02:44 PM Reply With Quote
I put some red rubber lube on the pistons before sliding them in, when the boots are on a nice bead of lube remains and keeps things nice and free.
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Angel Acevedo

posted on 31/10/17 at 02:56 PM Reply With Quote
Would you be willing to go the extra work to anodise the cylinders?
Anodising is more resistant to water caused corrossion than bare aluminium...
Also, corrosion may not be from external water, but from water absorbed by naturally hygroscopic brake fluid.
Maybe bleeding your brakes more frequently may alleviate the problem...





Beware of what you wish.. for it may come true....

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02GF74

posted on 31/10/17 at 05:27 PM Reply With Quote
Castor red rubber grease.





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fregis

posted on 31/10/17 at 07:29 PM Reply With Quote
for pistons lubrication i use ATE 03990205012 Cylinder Lubricant

https://www.amazon.co.uk/ATE-03-9902-0501-2-03990205012- Cylinder-Lubricant/dp/B004RAVYDG





Never be afraid to do what you are insolvent, remember: amateurs built the ark - Professionals built the Titanic.

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Mr Whippy

posted on 31/10/17 at 09:36 PM Reply With Quote
tbh I'd never heard of either of those products, they both sound superb

at last this problem seems solved thanks

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907

posted on 1/11/17 at 03:09 AM Reply With Quote
quote:
Originally posted by Angel Acevedo
Would you be willing to go the extra work to anodise the cylinders?
Anodising is more resistant to water caused corrossion than bare aluminium...



Also, corrosion may not be from external water, but from water absorbed by naturally hygroscopic brake fluid.
_______________________________________________________________________________________

Maybe bleeding your brakes more frequently may alleviate the problem...
___________________________________________________________






When did it last have a fluid change ?

Paul G





The one and only member of the Suttol Owners Club. Now also the MX5 Owners Club. A few more in that one.

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mcerd1

posted on 1/11/17 at 08:50 AM Reply With Quote
quote:
Originally posted by Mr Whippy
tbh I'd never heard of either of those products, they both sound superb


I'm still working my way through a tin of 'Lockheed rubber lube' that my dad inherited from my great uncle who retired about the time I was born (I'd guess its ~40 years old ! )
keep thinking I should invest in a new tin - but it still works well (its black just like some of the stuff that comes in sachets with new calipers etc..)





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Mr Whippy

posted on 1/11/17 at 01:08 PM Reply With Quote
quote:
Originally posted by 907
quote:
Originally posted by Angel Acevedo
Would you be willing to go the extra work to anodise the cylinders?
Anodising is more resistant to water caused corrossion than bare aluminium...



Also, corrosion may not be from external water, but from water absorbed by naturally hygroscopic brake fluid.
_______________________________________________________________________________________

Maybe bleeding your brakes more frequently may alleviate the problem...
___________________________________________________________






When did it last have a fluid change ?

Paul G


seriously only takes half a year and they start corroding and it pulling to the side. I got some of the red grease, weekend job to grease them up and bleed the brakes yet again, I have an easybleed so not too onerous

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