52telecaster

When I got it home I realized the anti rotation pin was broken out of it. Aside from being a pain possibly when changing wheels, is there any danger in using it? The cage seems straight and I rode the bike home shifting thru the gears properly. I mean could this just be a lighter version now?

steelbikeguy

This question has crossed my mind, as I've seen these on ebay without the stop pin. I think you've identified the main issue... over-rotation of the cage when removing or installing the wheel. In general operation, that stop pin should never be used.

Steve in Peoria

SurferRosa

Come on, man. You're too resourceful to use a broken derailleur on your own fleet. Toss it in your bin, and there's plenty still there (pulley wheels, anchor bolt, etc.) to offer donor pieces for future projects.

52telecaster

I was just looking at one of my jubilee derailleurs and I see it has no stop pin.... Perhaps I could reshape the cage of this suntour and pretend like it never had one?

steelbikeguy

Perhaps you could drill and tap a new hole just to the right (clockwise) of the original hole???

Steve in Peoria

52telecaster

I actually have plenty of other derailleurs I could use and I paid 50.00 and got a complete set of barcons in addition to the derailleurs plus a kid down the street wanted the frameset so I didn't have to take it to the coop. All in all a nice aquisition.

SurferRosa

Well, yeah! The barcons alone are worth $45.

And now the kid might mow your lawn or refrain from spraying your mailbox with his tag.

nlerner

I had a bike set up with an RD that was missing that stop pin. Biggest PITA was if I needed to remove the rear wheel, such as to fix a flat, the cage would spin around, the chain would tie itself in knots, and getting everything straightened out was a major endeavor. Not worth it.

madpogue 

Shove an allen wrench (or small stick or what-not) thru a convenient slot in the cage plate(s) before removing the wheel, to stop the cage from swinging 'round too far.



(Remember to remove it upon re-installation of the wheel.....)

52telecaster

If I had to that's an excellent emergency hack. I looked through my pile of broken derailleurs and found several stops that could be used by making a careful tapped hole. I may go that route. It would require buying at least one metric tap. Always a good time!

madpogue 

Any excuse to acquire another tool (and any excuse for another visit to a decent hardware store) constitutes an advancement of the human race.

52telecaster

My thoughts exactly, also giving up on a cool old derailleur against astronomical odds of doing anything remotely beneficial is just not my way!

52telecaster

A pin taken from a roached cyclone 2. This is the smaller pin that prevents it turning the opposite direction. It seems to be working fine with the new drilled and tapped hole. The location is a bit different so I may have lost a link of wrap but it works well now.

Glad it's back in service!

Pompiere

I bought a metric tap and die set from Sears before they closed all the stores around here. I frequently use the 5mm x .8, and occasionally the 6mm for bike work. What made the set worth the purchase price was using one of the bigger sizes for a mangled thread on a steering knuckle on my daughter's car.

I also used the tap set to restore the threads in a derailleur stop pin hole so I could insert a small screw.

52telecaster

Taps are so useful. I've got a 5 and 6 but needed a 3. My son's bike shop had it. Fixed me right up.

SurferRosa

Wow. Talk about handy.

52telecaster

My old man always fixed everything. I wish I was half as good as him. Plus while I didn't weigh before or after, it has to weigh less because the stop is smaller and I lost some stock on the cage so my son says it's now the super legere version.

SurferRosa

Now, drill it and replace all the bolts with ti.

52telecaster

Probably gonna hold off on that