Re: Rotax 300 builld
Posted: Mon Jul 22, 2013 6:38 am
Speaking of clutch, played around in the garage this weekend with the hydraulic clutch.
First thing up was to find the center of the clutch through the side cover. As it turns out, it's NOT where I thought it'd be.
No worries, I started with a small pilot hole until I found the center of the clutch, then it was easy to center the end mill right over it with total certainty.
Rotax Lamby build-047 by PotvinV8, on Flickr
Wasn't sure exactly how I was going to go about it until the surface was machined. Ideally I would have liked to bolt the slave to the case in the event that I ever wanted to change it to a different bore, etc. After thinking it over, it turned out to be simpler in the long run to just weld it to the case.
Rotax Lamby build-048 by PotvinV8, on Flickr
Twas a bit tricky TIG welding in such a confined space, but in the end I got it sorted. Good practice if nothing else....
Rotax Lamby build-049 by PotvinV8, on Flickr
The pushrod rests on a ball bearing inside the slave, this allows it to rotate on the button of the clutch and still spin freely without galling the slave. This was a bit tricky to figure out at first but I think this will work. My other option is to make a pilot bearing similar to what a car uses in the flywheel between it and the input shaft of the transmission. One way or another, I'm not sure the shaft won't ride on the button of the clutch when it's disengaged as there's no force in that direction, therefore it's necessary to try to come up with a way in which it won't eat things up if it does.
Rotax Lamby build-050 by PotvinV8, on Flickr
With the clutch rod outlet in the top of the case plugged and the banjo fitting with built-in bleeder installed on the slave, it's time to order some hoses.
First thing up was to find the center of the clutch through the side cover. As it turns out, it's NOT where I thought it'd be.
No worries, I started with a small pilot hole until I found the center of the clutch, then it was easy to center the end mill right over it with total certainty.
Rotax Lamby build-047 by PotvinV8, on FlickrWasn't sure exactly how I was going to go about it until the surface was machined. Ideally I would have liked to bolt the slave to the case in the event that I ever wanted to change it to a different bore, etc. After thinking it over, it turned out to be simpler in the long run to just weld it to the case.
Rotax Lamby build-048 by PotvinV8, on FlickrTwas a bit tricky TIG welding in such a confined space, but in the end I got it sorted. Good practice if nothing else....
Rotax Lamby build-049 by PotvinV8, on FlickrThe pushrod rests on a ball bearing inside the slave, this allows it to rotate on the button of the clutch and still spin freely without galling the slave. This was a bit tricky to figure out at first but I think this will work. My other option is to make a pilot bearing similar to what a car uses in the flywheel between it and the input shaft of the transmission. One way or another, I'm not sure the shaft won't ride on the button of the clutch when it's disengaged as there's no force in that direction, therefore it's necessary to try to come up with a way in which it won't eat things up if it does.
Rotax Lamby build-050 by PotvinV8, on FlickrWith the clutch rod outlet in the top of the case plugged and the banjo fitting with built-in bleeder installed on the slave, it's time to order some hoses.
