Classic & Vintage - Shimano Dyna Drive pedals

I have a set of Shimano DA Dyna Drive pedals. Over the years, the grease in them has totally gummed up, and they no longer turn smoothly. Time to clean + regrease. Can anyone give me advice on how to tear them down? Its rare that I have problems getting something apart, but these are a little tricky.

In order to get them apart you are going to need the special service tools that Shimano made for these, so keep a look out on ebay they do show up from time, but be warned I need them too.

Just rode my bike with them today, one guy who kind of knows bikes was totally confused, then I told him that Alexi rode them to victory in the '84 Olympics road race.

I have also been searching local bike stores, most young wrenches though have no idea what the pedal is nor what the tools look like. So look for the grey haired owner.

One of the Sutherland's bike shop repair ref. manuals do have some reference on them.

Thanks. Had a feeling there was an unobtainable tool involved. If I track down a set before you do, you're welcome to borrow them. I have a bad feeling, however, that its cheaper to just pick up another set of pedals than the tools.

The only special tool for this job is the pedal wrench itself. I have one of the Dura Ace DD pedal wrenches and these do make removal of the pedals a snap. Unfortunately I did damage to the pedal flats long before I had the wrench. I converted my cranks to pedal adapters for standard pedals. This wrench and these pedal adapters sold in separate ebay auctions last week (not mine) in the $30 range. I think you could measure the mm distance across the pedal flats and go to a pro auto mechanic tool supply and find a workaround for not having the correct wrench. What you need is a skinny wrench (a little thicker than a park brake centering wrench) that is open end of course in the proper mm size. Once you get the pedals off, I believe all you need are metric allen wrenches. Be aware that there are 2 rows of lots of tiny bearings, not in cages and several seals, washers and such that you have to keep track of and reassemble in the correct order and cones and locknuts to tension and tighten. I did it many years ago and I did one of the pedals perfectly, the other pedal I got a seal wrong or lost it or something and I had problems with that pedal if I recall. These pedals really need to be rebuilt as perfect as possible preferable with new ball bearings and some really thick quality grease like Finish Line Creamy Teflon. A substandard repack, and you aren't going to be happy with the creaky result ;) .