Hello
Have noticed when replacing the rear shoes on my FORD ESCORT MK2 1979 that it is always only the one shoe on either side that is worn much more than the other shoe...is this because it a leading shoe.....???? have others noticed this on their vehicle ???
thanks Jim
REAR BRAKE SHOES
Re: REAR BRAKE SHOES
You are spot on regarding the leading shoe linings wearing quicker. This is because the drum rotation creates a 'servo' action on these shoes, which isn't present on the trailing shoes.
Worth mentioning, it is important that the rear wheel cylinders on these cars are able to float, or slide, on the backplates. If they are seized, only the leading shoes will be working anyway!
Worth mentioning, it is important that the rear wheel cylinders on these cars are able to float, or slide, on the backplates. If they are seized, only the leading shoes will be working anyway!
Re: REAR BRAKE SHOES
Thank you for replying to me.....as the other shoe looks almost new i did replace the leading shoe only this time
Jim
Jim
It's most likely to be caused by either a sticking cylinder slide in the case of the earlier type backplates which use single ended sliding cylinders, or a sticking piston in the case of cars where two pistons are present and cylinders are fixed to the backplate.
A late MK2 should have twin pistons at each wheel cylinder, but the fact that you mention that this affects both sides would tend to suggest sliding cylinders stuck at the end of their travel. Could it be that you have earlier parts? It's not unheard of for a piston at either side to stick but that happens mostly if the car isn't used often and is left standing with the parking brake on.
A late MK2 should have twin pistons at each wheel cylinder, but the fact that you mention that this affects both sides would tend to suggest sliding cylinders stuck at the end of their travel. Could it be that you have earlier parts? It's not unheard of for a piston at either side to stick but that happens mostly if the car isn't used often and is left standing with the parking brake on.
Centripetal force acts on both shoes equally so both are subject to "self-servoing" action in use. Leading shoes ought to wear at the same rate as trailing shoes..Tigdlo wrote:You are spot on regarding the leading shoe linings wearing quicker. This is because the drum rotation creates a 'servo' action on these shoes, which isn't present on the trailing shoes....
J
"Home is where you park it", so the saying goes. That may yet come true..
"Home is where you park it", so the saying goes. That may yet come true..
Re: REAR BRAKE SHOES
I'm surprised at that John, makes you wonder why they bothered with twin leading shoe brakes?
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