hydros really are meant to be sped up, it could hurt them changing pulleys. you could get bigger tires, but that will throw the deck out of whack if they are big enough to actually make a difference.

have you ever changed the oil and drive belt on it? if not do it and you may be surprised at the gain in speed.

 

It has 190 hours on it. Always change the oil. But should the belt be worn with only that many hours?

 

Given the guts that are spinning around in there, you can't just increase the input speed of a hydro trans to get more speed. The internals won't take it. Basically all lawn tractors are going to run 5 mph like the L110. Some garden tractors will go a little faster, and the largest types (like an X700-series) will run 8.5 mph.

ZTR's, even residential models, will run much faster than a lawn tractor. Could be an option.

 

not the engine oil, the HYDRO oil. you must remove it from the tractor to drain it out the vent, but it can be done. at 190 hours it is about time, as tufftorq recommends it at 200 hours. Deere says the tranny is non-serviceable, but TT sells repair parts/kits.

fill it with 10w30 dino or synthetic.

 

Actually, if you do ever decide to change the hydro fluid, Tuff Torq is recommending 5W50 synthetic to replace the 10W30 now. I just went through this procedure on my K46, plus some extra repair .

Tuff Torq Recommended Fluids

 

Thank you everybody. Looks like I'll be mowing like a snail for a while yet.:fing20:

I was hoping there was an adjustment to open up the valve a tad more. Darn

 

adjust the linkage from the lever on the fender to the lever attached to the trans. you can make forward faster by making reverse slower and vis versa

 

I've done this on an L120 by increasing the engine speed from 3000 to 3500. So the K46 tranny input went up to 3500 as well.

they hydro tranny is actually quite simple to understand as far as ratios. The tranny has a pump and motor, and then some gears. The gears have a ratio. And the pump-motor have a cc-cc per revolution ratio as well.

For the K46, the pump and motor are 7 and 10cc respectively. So for every revolution of the pump, the motor makes 0.7 revolution. Now if you increase speed on the pump (input shaft), you will increase speed on the motor.

Of course, there would be some increased wear & tear on the system, but it can be done, and it's not going to kill the tranny overnight.... I ran my L120 set-up that way for over 2 years with no problem. But that's no guarantee.