How to remove circlip & rotor FHF 90-5

Chopin · December 29, 2017

How do I remove the rotor and/or circlip of this movement ? Pic below from the net.

Am I right that the center pinion or whatever is called has to go in the semi-circle area of the circlip and then it just comes out ? Any tips for doing this ?

Ishima · December 29, 2017

Hmn, the c clip is set into a recess right? no room to slide it directly out? Might be worth removing the auto bridge first and seeing if that gives you any options. I suppose the only other way would be to pull open the clip with one tool - with that circle slot on one side - while trying to pull it up and out of the recess with another, but I'd be wary of that.

Edited December 29, 2017 by Ishima

rogart63 · December 29, 2017

Pull out the clip by putting a tweezers or sharp pegwood in the small hole in the circlip. It will pop up and you can remove it.

Take care when working on the 90-5 so you don't loose the little gear that takes care of the speed date setting.

Chopin · December 29, 2017

@rogart63 Managed to remove the circlip (was quite tricky) but the rotor isn't coming out. Do I have to remove the plate first ? Would be a bit tricky as the rotor edge seems to be covering one of the screws...

PS: Here's a photo of the circlip for future references in case someone will need it.

Edited December 29, 2017 by Chopin

rogart63 · December 29, 2017

1 hour ago, Chopin said:

@rogart63 Managed to remove the circlip (was quite tricky) but the rotor isn't coming out. Do I have to remove the plate first ? Would be a bit tricky as the rotor edge seems to be covering one of the screws...

PS: Here's a photo of the circlip for future references in case someone will need it.

Don't think so. Can check my movement i have here and see if there is any trick?

rogart63 · December 29, 2017

No problem to remove. didn't even had to take the clips of. Just put a tweezer in and lift straight up. There is a post that could wear out and the rotor could be worn inside.

The post is screwed from the underside with 3 small screws. Can be replaced.

Edited December 29, 2017 by rogart63

Chopin · December 29, 2017

The movement is functional. The rotor lifts up just a bit but just won't come out... I don't understand what the point of the circlip is and how could it just lift up on your movement. It's a little weird if you ask me...

The small plate onto which the rotor seems to be attached to has 2 scres but one of them is being partially covered by the rotor edge so I can't unscrew it...

Edited December 29, 2017 by Chopin

Chopin · December 29, 2017

I managed to unscrew the plate but the shaft holding the rotor is longer and attached somewhere else, beneath it... This is becoming very confusing.

rogart63 · December 29, 2017

1 hour ago, Chopin said:

I managed to unscrew the plate but the shaft holding the rotor is longer and attached somewhere else, beneath it... This is becoming very confusing.

Strange? Have 3 90-5 bridges here but only one rotor. The rotor is so easy to lift that i can do it with a tweezer. To remove the plate you need to remove the two screws on the bridge.