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Aug 25, 2015 10:32 am
Aug 25, 2015 10:32 am
Subject: Brake cylinder pistons seized; how to free?
Well, these are actually on my LG6, but of course the same brakes as the V12 (but not LG45 etc, hence posting here).
I last drove my LG6 in 2001, so predictably, all the pistons are seized; at least in the rear brakes. Not too surprised, I found the pistons on my V12's brakes could be stuck after just 6 months lay-up.
The cylinders are cast iron, whilst the pistons are aluminium...perfect combination for electrolytic corrosion. The pistons are recessed to accept the shoe push-rod, so have nothing to grasp to twist. I recall dealing with a stubborn one on the V12 many years ago, ending up using a hammer and punch...that did the job eventually but didn't do the soft aluminium any favours. Really want to be kinder this time round!
So does anyone have a neat and reliable solution to dealing with stuck pistons?
Laurence
Well, these are actually on my LG6, but of course the same brakes as the V12 (but not LG45 etc, hence posting here).
I last drove my LG6 in 2001, so predictably, all the pistons are seized; at least in the rear brakes. Not too surprised, I found the pistons on my V12's brakes could be stuck after just 6 months lay-up.
The cylinders are cast iron, whilst the pistons are aluminium...perfect combination for electrolytic corrosion. The pistons are recessed to accept the shoe push-rod, so have nothing to grasp to twist. I recall dealing with a stubborn one on the V12 many years ago, ending up using a hammer and punch...that did the job eventually but didn't do the soft aluminium any favours. Really want to be kinder this time round!
So does anyone have a neat and reliable solution to dealing with stuck pistons?
Laurence