Tuff Torq K51A Explanation Attempted

[@annamariababuin2131]

Hello, I have one of this, it doesn't move, when I lift the mower the wheels goes very slowly..lack some oil in circuit? Can't find the refill plug..Ciao!

[@petejones4808]

Very likely low on oil. Possibly because leaking oil seals on axles and input shaft. The refill plug is on top. It’s next to impossible to refill without removing the transmission.

[@phcos1]

Thank you. Understanding how things works is always better than just changing parts. The only bad thing of your video is that you move too much and I'm almost seasick now.

[@MikeDMays]

I been working for 4 years+ making these transmissions. some have alot of parts some not so many this is a rather straight forward model with the only acception it has a pump case and no axle bearings. Instead it rolls on bushings. These are well built transmissions as a K51 is a older model now and depending on how old your model is you may have bearings to hold your axels in place but i doubt it. Might I ash you why you chose to take it appart?

[@jbond00765]

ACTUALLY THE NEEDLE IN THE MOTOR SIDE OF THE MANIFOLD IS A PRESSURE RELIEF VALVE. IT WILL TAKE THE PRESSURE OFF THE OIL IN THE MOTOR HOUSING SO YOU CAN MOVE THE TRACTOR WITH OUT TURNING THE PUMP AND THE INPUT SHAFT . THE NEEDLE WILL NOT FALL OUT SINCE IT IS LONGER AND HORIZONTAL. OF COURSE IF YOU FAIL TO PUT THE NEEDLE IN , THERE WILL BE NO PRESSURE IN THE MOTOR SIDE AND THE TRACTOR WILL NOT MOVE.