TomB Posted January 16, 2011 Share Posted January 16, 2011 Has anyone had to change the big rubber dust seal for the rear brake piston? Im having a devil of a job getting it the seal to fit in the groove on the brake calliper. The seal is on the piston OK which is wound in. There is a machined circular grove on the calliper to allow a lip on the piston dust seal to go in to prevent dust etc getting into the piston/ calliper housing. If it makes any difference, the calliper is still on the car. Just spend 2 hours winding out the piston, cleaning and trying to get it back together. I wont be applying for any jobs in the fast fit industry! Link to comment Share on other sites More sharing options...
Support Team c7trp Posted January 16, 2011 Support Team Share Posted January 16, 2011 Assuming you mean the Ford calliper - its a bit of a faf to get on but I did mine on the bench. So a bit of a faf on the bench may translate into a 'mare on the car? IIRC wind the piston out about 20mm slide the seal past the groove in the piston. This gives a bit more slack in the rubber to push the outer edge into the groove on the calliper. Then wind the piston in to locate the inner edge in the piston groove I think I then wound it in and out a couple of times to fully seat the outer edge in the calliper. This may a *lot* easier with the calliper removed, it may be quicker to bleed the brakes than struggle getting the seal on...? Link to comment Share on other sites More sharing options...
TomB Posted January 16, 2011 Author Share Posted January 16, 2011 Thanks Ill give that a whirl tomorrow evening. Did you push the calliper lip on the seal in with anything? A small screwdriver or something? Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted January 17, 2011 Share Posted January 17, 2011 Beware of anything too small and pointy .... easy to slip and tear the seal !!! Link to comment Share on other sites More sharing options...
TomB Posted January 17, 2011 Author Share Posted January 17, 2011 7 Workshop and Redline have suggested trying to fit the seal to the calliper first, then easing the piston in. With lots of brake fluid as lubricant, hopefully that way will work! Link to comment Share on other sites More sharing options...
TomB Posted January 17, 2011 Author Share Posted January 17, 2011 Success! I removed the piston, and refitted the seal over the rear of the piston and slid it up the piston a bit so that the lip for insertion into the caliper was protruding. Then I positioned the seal lip into the caliper, then gently turned the piston into the caliper and wound it back in. I cant see how it could be done the Haynes way, placing the seal over the front of the seal, winding it in and then trying to do it. Another Haynes lie! Link to comment Share on other sites More sharing options...
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