stuck caliper?

[postman_pat]

Yes, there are some o-rings which are not apparent on the pictures you provided. They appear to be missing?. Part no. is 59111-45001, marked as "3" on the parts diagram. You'll need two.

[gspower]

Yes, there are some o-rings which are not apparent on the pictures you provided. They appear to be missing?. Part no. is 59111-45001, marked as "3" on the parts diagram. You'll need two.

Fairly confident there were never any o-rings on the caliper in that spot. I'll put them on, in any case. I have a box of assorted rings. Where exactly does it go and why?

[postman_pat]

Not unusual for the o-rings to be missing. The calipers are a few decades old after all - they've probably been apart in the past. Maybe they were perished and got thrown away?

They go here.

Untitled.jpg

[Brendan W]

Backtracking a bit to the discussion about 5 brake fluid not absorbing water. My view of fluid for everyday use is that provided you change regularly, water absorbtion is a good thing. The fluid effectively acts as a scavenger. I see 5 as a race fluid where disc and pad wear is so high that fluid changes will happen automatically at greater frequency.

[gspower]

Thanks postman. Will stick an approximate sized o-ring on there before reinstallation.

However ... can anyone tell me exactly where THIS - http://tinypic.com/view.php?pic=f3hudk&s=8 - goes? Still a little unsure.

[postman_pat]

It's a press fit into the caliper. A FIRM press fit into the caliper. You'll feel it when it goes "home".

DSC_0006.jpg

[postman_pat]

Not unusual for the o-rings to be missing. The calipers are a few decades old after all - they've probably been apart in the past. Maybe they were perished and got thrown away?

They go here.

[ATTACH=CONFIG]38818[/ATTACH]

BTW, I just realised, looking at your original photo, that this style of caliper axle bolt is the later type, which shouldn't require an o-ring. That's why they are missing. Just apply some grease to the bolts and re-assemble.

Apologies for the confusion, thought I'd better set that straight. You would have had a hard time getting those o-rings on.

[gspower]

postman, you are a lifesaver. I successfully rebuilt and installed the caliper yesterday. I didn't see the bit about o-rings, but tried them and decided not to use them. Glad I made the right decision. I had a buddy come over and help bleed the lines .... brake is nice and firm again. Performing better than ever before. Thank you thank you thank you. Will post pictures in a few days.