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Old 05-11-10, 06:55 PM   #1
ReelExterminato
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Adjusted M770 pedals, seal popped out

I guess I added a bit too much grease, though on other pedals I have rebuilt, it just flows out. How far does it go in? Google hasn't been helpful...

Both seals came out (I didn't notice it immediately) so I can't look at the other one to check, but the seal has a notch in it that seems to locate it along the inside of the main pedal bolt. It's the seal just to the left of #2 in the techdoc.

They're brand new pedals, one of the bearings was just a little tight. For future reference, should I be adding less grease? And should I be leaving some of it where it oozes out, or wiping it as clean as possible (folding a paper towel over and 'digging' it out)?
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Old 05-12-10, 12:25 AM   #2
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Quote:
Originally Posted by ReelExterminato View Post
I guess I added a bit too much grease, though on other pedals I have rebuilt, it just flows out. How far does it go in? Google hasn't been helpful...

Both seals came out (I didn't notice it immediately) so I can't look at the other one to check, but the seal has a notch in it that seems to locate it along the inside of the main pedal bolt. It's the seal just to the left of #2 in the techdoc.

They're brand new pedals, one of the bearings was just a little tight. For future reference, should I be adding less grease? And should I be leaving some of it where it oozes out, or wiping it as clean as possible (folding a paper towel over and 'digging' it out)?
Sounds like you've already got it figured out. Packing an entire sealed pedal body with grease is excessive - just do the bearing surfaces.
By the way, it's common for the bearings in new pedals to be a bit tight. That mostly goes away with some breaking in.
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Old 05-12-10, 12:30 AM   #3
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I'm still not sure how deep I should push the seal. I guess I'll just take one of the spindles apart along with the bearings, to see where I can find an indent for the seal in the pedal bolt...
The bearings in one of the pedals were 'rumbling', so it was a bit tighter than I thought was healthy for new pedals
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Old 05-12-10, 12:55 AM   #4
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That was easy... for future reference, the seal is 2mm thick, and there is a tapered shoulder starting at 7mm in, past which the seal can't go - no locating indent. I guess it can sit anywhere between the 0mm and 5mm mark.

The trick is to tighten slowly, to allow air to purge w/o blowing the seal out

Last edited by ReelExterminato; 05-12-10 at 01:42 AM. Reason: a tip
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Old 05-12-10, 04:02 AM   #5
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Hm, that's strange. My PD-M540 pedals didn't come with those seals in the first place, even though they're shown on the exploded view.
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