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-   -   Guidance on disassembling a Dyna Drive pedal? (https://www.bikeforums.net/classic-vintage/742033-guidance-disassembling-dyna-drive-pedal.html)

tmoneygetpaid 06-08-11 06:39 PM

Guidance on disassembling a Dyna Drive pedal?
 
Hey,

I picked up a Lotus Eclair today, an 83ish with the full first-gen Deore drivetrain. :) There are two little things I noticed needed fixing before she's roadworthy. The first I wanted to tackle is that one of the Dyna Drive pedals needs a rebuild. I can't quite figure out how to open it up, so I'm wondering if anyone has done this and can steer me in the right direction.

I can see the bearings through a little tiny space between the washer and the threads, so I know they're right there, but trying to turn both the nut that sits on top of the pedal and the washer that sits below it (which also has wide flats, maybe 20mm or so) either way didn't accomplish any loosening.

It's the left pedal, if that makes a difference.

Here's a picture:
https://lh3.googleusercontent.com/-S...608_200704.jpg

Collin2424 06-08-11 06:41 PM

I have EXACTLY the same question. I have the same pedals, and one really needs the bearings repacked. I'm terrified, however, to open up the pedal because of how hard they are to find/replace. I'll be watching this thread, and I'm sorry I don't have anything to add.

On another note, I have the adapters that thread into that sized crank and allows the use of English-threaded pedals. They're impossible to find, but I'm going to take mine to a local machine shop and see if I can get a batch made for other forum members. Let me know if you want in :)

-Collin-

tmoneygetpaid 06-08-11 06:45 PM

I would definitely want in!

BTW there are a couple threads about this exact issue, but all fall short of actually elaborating the procedure for the rebuild, with the OPs left hanging...

Flying Merkel 06-08-11 07:10 PM


Originally Posted by Collin2424 (Post 12760117)
I have EXACTLY the same question. I have the same pedals, and one really needs the bearings repacked. I'm terrified, however, to open up the pedal because of how hard they are to find/replace. I'll be watching this thread, and I'm sorry I don't have anything to add.

On another note, I have the adapters that thread into that sized crank and allows the use of English-threaded pedals. They're impossible to find, but I'm going to take mine to a local machine shop and see if I can get a batch made for other forum members. Let me know if you want in :)

-Collin-

My Univega Super Strada uses those. Hate them. Stuck with them. Keep me posted about adapters!

knoregs 06-08-11 07:24 PM

In the meantime couldn't you use a syringe to inject some Phil grease into the bearings?

Collin... If you are running a list for the adapters, add me to it please.

~kn

balindamood 06-08-11 07:24 PM

I have rebuilt several of them (1st generation Deore is my all-time favorite group), although it has been a while. You need to pry the little plastic ring off. It comes off easily, but will probably self destruct. I am not sure how super critical they are. Anyway, you will now have two thin nuts, one about 20mm, and the other about 14-15mm. They work just like a standard cone and lock-nut (the smaller one is the lock-nut). I do not recall if the left side is reverse-threaded, but that should be easilly determined by trying the regular way first. If no luck, try reverse. The bearings are tiny like freewheeel bearings; both easily lost and replaced.

Only the cones and the axle are hard to replace if trashed, but it should be hard to ruin one trying to re-build them. If you give up, feel free to send all of the components to me ;-).

tmoneygetpaid 06-09-11 04:15 PM

Yeah, I got that plastic protector off with a flathead (it was literally glued), and the picture is what's below: it looks like a normal locknut-over-cone, but I applied a lot of force each way and they didn't move. I'll try again with more certainty and re-post...

Thanks!

balindamood 06-14-11 12:44 PM

I found this in my Shimano AX parts box. Itr may be marginally useful in your dis-assembly/re-assembly endevours.

http://i136.photobucket.com/albums/q...edalus3371.jpg


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