Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I have a Craftsman 19hp Twin Turbo lawn tractor with hydrostatic transmission. Recently, the tractor does not go up hills or at any incline like it used to. When the tractor first starts, it seems to be OK. Then, as it heats up, a high pitched whine emanates from the tractor when I attempt to go uphill. I changed the front motion drive belt, but this had no effect. Sears will charge me $96 just to look at it, and if it is the transaxle, it would probably be better if I bought a new tractor?? Looking for advice...it is a sealed unit, but is it missing some fluid? Thanks for any help.

If you have a Tuff Torq K46 hydro, you're not alone with problems. Those are very lightweight and will provide good service as long as you only mow on mostly flat ground. You can drop the transmission easily (6 bolts, belt, 2 linkages) and open it up to replace the oil, but you can also rebuild it yourself. It is also possible to upgrade it to a K66 model which is MUCH heavier and readily serviceable. http://www.tractorbynet.com/forums/parts-repairs/164892-tufftorq-k46-repair-guide-pictures.html IMO, it is borderline fraud to call anything (and I don't care what brand it is) equipped with that K46 hydro a tractor. They're pure lawnmowers and doing anything else besides pulling a light cart is too much for them.

Yes, my LTX1000 is a hydro transaxle sealed so my understanding is that it cannot be rebuilt. I have used it 12 years on 1-1/2 acres of mostly hills and most fairly steep -usually takes about 2-1/2 to 3 hrs to mow all at same time. It has had wheel weights and chains on it the whole 12 years .  I've kept the oil changed and lubed every year. The hydro tranny is wonderful for hills to adjust the speed according to the condition-up,reverse and turns on the hills. I can't say enough good about this mower. That said I've taken the chance and purchased a used tranny from Florida (no hills) and should receive it soon. i hope that it all works out but still would like all the thoughts anyone may have on my upcoming project. Thanks !

It CAN be rebuilt - the Sears guy even quoted you a price for a rebuilt trans, right? - but it is considered not "user-serviceable". Sealed just means you have to open the case and replace the gasket (RTV) when you close it up again. Anyway, since you have another one the way, consider changing out the oil before you install it. The new one may not have a drain hole in which case you'll have to pry off the vent cover and flip the thing over a few times to drain it. You can just add as much as came out, but better to do some research and find out how much should be in there. If you're careful you can reinstall the same cover, but if you break it you'll have to buy a new one - not expensive by itself but shipping and possible minimum order charges may bite you.

I would definitely change out the dino oil and replace it with the same viscosity synthetic oil which has a much higher temperature tolerance. The Tuff Torq K46 transaxel calls for 1.9 litres of 10W30.

Your Craftsman mower has a Hydro-Gear model 319-0650 transmission (http://www.m-and-d.com/pdfs/hydrogear/319-0650_150071.pdf) Sears part #150071. Try googling those numbers. Good luck.

Thank you for the reply and schematic site.  I just looked at the transmission and it says a 310-0650.  Is that the same as the 319-0650?  ...or will it work the same?

Sorry, no idea. You sure it's a 0 and not a 9?

Hello, I have a 19hp craftsman, I changed out the 16.5hp for a 19.5. After i did that it was hard to shift the gears. its like a standard car with the clutch starting to go, it seems like its locked up. any suggestions to my problem?

thanks