Caliper dust seal retainers

This tip comes from Peter C. of World Wide Auto Parts

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Q: Does anyone have any tricks that they have used for installing the dust seals and retaining ring for the disc brake caliper pistons.

A: I have done many, many of these. My best success comes from doing the following: Scrupulously clean the retaining ring bore. Sanding and scraping. Lightly sand or file the outer edge of the ring. There is usually some stamping flash. Install main seal. Install piston coated with install lube or fluid completely into the bore. Assemble dust seal into retaining ring. Gently work the assembly over the piston. Now the tricky part. The best tool I've used or seen is an outer bearing race. Part number is LM67010. VERY common. Go to a bearing shop or parts store. Ask for CUP # LM67010. It is the outer race for all MGB, and big Healey front wheel inner bearings. And it fits a gazzillion other cars. It is the perfect diameter for this. Use the race to press in the retainer. I use a thin piece of steel to even the load across the ring. Pay special attention to the relieved area of the caliper casting. That is where the ring usually hangs up. Good luck. PITA, isn't it. Best to have some practice. Hope this helps. ---Peter C

 

 

 

This is the tool made by Paul Asgeirsson.

Now for the fitting of the dust shield metal piece. I took a 2" pipe coupling, turned the inside diameter to clean out most of the threads and to match a slight interference fit with the dust shield metal piece, put a step inside it to fit on the raised ring on the caliper bore, turned down a 2" pipe nipple about 6"long to fit inside this fancy coupling. Now I put the metal shield with the rubber installed inside the bottom end of this coupling, place the coupling on the caliper half, drop the pipe nipple down it, raise it a time or two in and let it drop each time and now the metal is all fit in the groove. Works so slick makes me wonder why I struggled with c-clamps and metal covers all these years! A mini pile driver!! ---Paul A.