AMP Research fork manual
03-27-20, 12:27 AM
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AMP Research fork manual
I just picked up and want to restore a 1995 Trek 850 mountain bike that is equipped with an AMP suspension fork. I believe it's an F2 with silver alloy tubes, single piston and cantilever brakes. The fork appears to be in good condition, but I would like to disassemble, clean and lubricate it. Does anyone have available an owner's or service manual that I could wrangle a photocopy of, or is available for purchase? Thank you.
03-27-20, 08:21 AM
#2
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I would check retrobike.co.uk
If any website has a pdf, it would be there. I sold a bunch of AMP stuff awhile ago, manual included. It's not super complicated, but you need a very large cotter press looking tool and some other bits to even attempt it. You also need a set of new bushings to replace the old ones.
Pretty much the only thing you can do without replacing parts is refill the oil in the tiny damper. If I recall that takes standard ATF fluid you can buy at an auto parts store.
Edit: Found an old picture of the tool kit
If any website has a pdf, it would be there. I sold a bunch of AMP stuff awhile ago, manual included. It's not super complicated, but you need a very large cotter press looking tool and some other bits to even attempt it. You also need a set of new bushings to replace the old ones.
Pretty much the only thing you can do without replacing parts is refill the oil in the tiny damper. If I recall that takes standard ATF fluid you can buy at an auto parts store.
Edit: Found an old picture of the tool kit
Last edited by wesmamyke; 03-27-20 at 06:40 PM.
03-28-20, 09:23 PM
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Thank you, Wesmamyke. The photo helped me get a clear sense that this is not something to tackle without the specialized tools and parts. Good, that's what I need to know. As the fork is completely tight and functional, I'll simply clean it up, oil the bushings and check out the damper. Oh, and a bit o' polish while I'm at it.
Have you any recollection of the amount of ATF to put in the damper, or even how to determine same?
Added an hour later...
Wesmamyke, your advice was spot on. A search on retrobike.co.uk quickly brought me to high-quality pdfs of the correct manual. And I learned not to lube the bushings, just wash them water, to avoid lubricants, as they will "attract dirt and carry it into the pivot points where it will act as an abrasive". A serious thank you!
Have you any recollection of the amount of ATF to put in the damper, or even how to determine same?
Added an hour later...
Wesmamyke, your advice was spot on. A search on retrobike.co.uk quickly brought me to high-quality pdfs of the correct manual. And I learned not to lube the bushings, just wash them water, to avoid lubricants, as they will "attract dirt and carry it into the pivot points where it will act as an abrasive". A serious thank you!
Last edited by Noschwinns; 03-28-20 at 09:50 PM.
03-28-20, 09:32 PM
#4
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I rebuilt an F1 version years ago. ATF is the correct fluid for the damper. It just unscrews to open. I flushed it out a few times with clean fluid. The only other thing I changed were the nylon bushings.
I remember it it being a fairly straightforward process.
I remember it it being a fairly straightforward process.
