F355 suspension gear position.

[taz turbo]

I’m after someone’s advice…

I have a broken gear on the top of one of my 355 rear dampers, the gear that the actuator drives. My question is how do you set the rotational position of the rod prior to fitting the new gear? The rod seems to rotate infinitely either CW or CCW.

Cheers,

Chris.

[gotoPzero]

Its been a while but I am 85% sure those adjusters have 180 degree hard stops.

[taz turbo]

gotoPzero said:

Its been a while but I am 85% sure those adjusters have 180 degree hard stops.

Thanks,

You are correct about the hard stop, it’s the gear that has a protrusion that acts as the hard stop, just where in the rotation should the rod be before fitting the gear.

Or,

Should the adjustment rod on the damper NOT rotate infinitely in each direction, hmm, might have to remove the gear of another damper and see what it does.



Chris.

[HardtopManual]

Been a while since I did mine but I seem to remember there's a pin that locates the gear onto the shaft, and a stop on the gear, so you can't get it wrong.

[gotoPzero]

Sorry missed your post last night the spline that sticks out of the top of the shock I am sure that only goes about 90 deg each way. I remember trying to move them manually on mine when I had the yellow warning light on just to check they were free and I am sure you could only move then a little bit each way.

The actuators.. they do a kind of self test at start up and calibrate. Its kind of twice right to find the stop then back to the middle. I think they are designed that it does not really matter if they are a spline or two out either way.

[taz turbo]

Yes, the gear rotates by appx 180 degrees, the stop that limits this is on the gear itself and a fixed part on the end of the damper shaft. Consequently with the gear removed (broken) the shaft is rotating infinitely!

Maybe the following pictures may explain things better…

Fixed stop on the damper shaft…


Stop faces on the gear…


The quandary being, does it matter where the shaft rotation is before fitting the gear, the pin that retains the gear to the rod is drilled centrally so it’s also possible for the rod to be 180 degrees out of position in relation to the stop positions of the gear.

I’ll pop off the other side when I have opportunity, probably won’t be for a week or so though.

Cheers,

Chris.

[HardtopManual]

Given that rotation in normal operation is <90, there are only two options 180 degrees apart and no assembly marks, I'd be pretty confident that it doesn't matter.