trunion repair?

ihnick · #1 03-02-2011, 12:09 AM

I've heard a lot of talk of this on this and the other forums. I'm pretty sure its something to do with hydrostatic linkages?So what exactly is it? What should a person be looking for to notice if it needs repairs? How hard is it to do? How costly is it?

ajgross · #2 03-02-2011, 12:48 PM

I find a dremel tool perfect for grinding the welds down. Also I recommend adding a washer or two between the spings and the guide pins. It seems to help a lot too.

AJ

westofb · #3 03-02-2011, 05:05 PM

Quote:

Originally Posted by Wild Bill

Check out this link Nick: http://cubfaq.com/hydrolurch.html

In the top picture, you can see the corners of the spring slot are worn.

You have to split the tractor, take the snap ring off to remove the cam plate, to remove the springs and guide pins (end caps). Then using a wire welder, fill in the worn corners (just a quick shot with the welder, you want just enough weld to fill in the corners!). After the metal has cooled, you use a square or flat file, and square up the corners. Also make sure the top and bottom are flush too. Then, install new inner and outer springs and guide pins, plus shim the cam plate. And put the transaxle back into the tractor.
QTY Part#
(1)- #732-3012 light spring
(1)- #732-3013 heavy spring
(2)- #711-3033 guide pins

My tractor (149) is in need ot this repair, had the tunnel cover off the other day to change out the rock shaft assembly, was able to see the cam plate, trunion (springs), and notice the cam plate is very sloppy. I would guess I could move it side to side better than 1/2". I see some of the sponsors sell washers (shims) in different thicknesses, I am guessing as sloppy as mine is it no doubts alot of shims, but don't know which ones to purchase. I thought about getting an assortment, like maybe one of each different thickness, using flat washers to take up the majority of the slop, and then using whatever shim from the assortment to fine tume it. I am not sure how tight it should be when I am done adjusting it, will also replace the above mentioned springs and guilde pins while it is apart and repair the worn areas of the slot while it is apart. I also noticed that at least one of the sight sponsors sell a trunion repair slot, just cut out the old and weld in the new. I am not sure if it would be just as easy to weld and file the original or weld in the new piece.

Hopefully making these repairs will get my 149 to act a little more civilized, it tends to be a little jerky as it is now. Any thoughts on the shims and trunion repair would be greatly appreciated.

cub149 · #4 03-02-2011, 05:47 PM

I did one without spliting the tractor and one with spliting the tractor. I covered everything with a non flamable cloth to protect from splater, I only have a stick welder. I also wraped a piece of cloth around the bottom and shaft and kept it wet to help keep the heat from spreading throughout the shaft. Weld a spot and file it and if needed weld again until you get it right. The one VERY IMPORTANT thing is to use all NEW snap rings and CLEAN out the groove and then clean it again. If you don't beleive me read this http://www.onlycubcadets.net/forum/s...ead.php?t=1097