Cat 1 measurements

Ozarker · May 19, 2004

Went to attach my recently purchased YM tiller to my YM1500 and discovered that I couldn't make it fit. The drive shaft was too long and the top link was too long. I assumed that I had a standard cat 1 set up but apparently I do not.

So plan 'A' was to get a shorter top link and cut the drive shaft. No go............. the shorter top link is for cat 0 and the pins I have are too large. The one I have is 20.5" center to center at it's shortest length.

Then I got to looking at the arms and it seems that the standard cat 1 arms in stock are 32" long. The cat 1 arms on my Yanmar are 24". THAT seems to be my problem. Short arms.

So tell me. what is the length (center to center) on your cat 1 arms? It looks like all my problems will be solved by simply cutting the ends off my arms and adding 6".

TWINKLE_TOES · May 19, 2004

xantherx, provided a lot of insight and data (Yanmar) in This Thread

Ozarker · May 19, 2004

Thanks, I remember that. He was responding to me at the time as I was trying to solve my side to side sway. I fixed that.

Looking at those pictures again, the lower arms appear to be about 36" long even tho the ones he made are 26" long. Mine are 24" long and I think I need to alter them to make them 36" long.

greg_g · May 19, 2004

There are universal TPH replacement kits readily available that should be easier and safer (and maybe cheaper) than trying to modify what you've got. I priced one for my YM240 a couple years back; $125 plus freight I think.

//greg//

Inspector507 · May 19, 2004

I had a YM1700 with a RS style tiller. It had a special top link that made it all work out right. A regular top link would not work.

Ozarker · May 19, 2004

What does RS mean?

Inspector507 · May 19, 2004

Tiller model RS1200

Ozarker · May 19, 2004

Oh, I thought it was a style of tiller.

So why won't a regular top link work? It appears to be setup for a normal 3pt connection.

BXMMCC · May 20, 2004

Agri-supply has shorter (13 and 16 inch) CAT 1 toplinks. They also have CAT 0 toplinks (7 and 9 inch) if the CAT 1's are too long. If you use the CAT 0, get a couple of pins and bushings so the fit stays the same.
Much easier and less expenive than cutting and welding your lift arms.

Inspector507 · May 20, 2004

That's how the Japanese designed it, who am I to argue /forums/images/graemlins/grin.gif
Actually it pivots in the middle, making the lifting geometry different.