Does anyone know what the steel ring which is inserted around the caliper piston is for? I replaced the pads on the front of my Defender and I noticed that around one of the pistons there is what looks like an iron O ring and it has come loose. I am sure it's not critical but all the others seem to be corroded in place and they don't seem to do anything. Any ideas will be gratefully received.
Brake caliper o ring
- Thread starter lrmonks
- Start date
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ONE LIFE LIVE IT. D90
Active Member
- Posts
- 953
It's to retain the dust/dirt seal. There are 2 seals per piston, 1 is a fluid seal, the other is a dust/dirt seal.
It sounds like your calipers need a rebuild. Once the dirt gets behind the first seal (dust/dirt seal) it corrodes the piston and eventually the piston siezes in place.
Flossie
Well-Known Member
- Posts
- 10,630
- Location
- Shropshire
+1.
Rebuild with stainless steel pistons , it's easy and quite cheap to do.
Rebuild with stainless steel pistons , it's easy and quite cheap to do.
