Grinding gears

woodlot · May 5, 2005

I've been doing some loader work with my tractor. Its a 1920 with the 12x12 sss trans. I'm doing all work at approx 2,000 rpm. Occationally I hear the dreaded sound of grinding gears (not real bad but a little grind) when putting it into forward or reverse. I'm trying to figure out why this is happening, if something is wrong or if I'm doing something stupid. I have the clutch fully depresed when shifiting. This does not happen all the time, in fact I'd say only 1 out of every 20 shift changes. I think I have determined that there is one serieno when it happens consistantly. Its when I'm changing directions (fwd to rev or vise versa) and I think I've caught gear but I'm acctually in neutral.....I let off the clutch thinking I'm going to move but I don't.....I then press in the clutch and shift into gear....this is when the grind occurs. However, if I'm changing directions and don't accidently put it in neutral I very rarely get a grind.

Can anyone help me out?

djradz · May 5, 2005

It's been several years since I had my 1720, but I seem to recall a similar situation, doing exactly as you've described. I too frequently went from forward to reverse, heck that's the beauty of the SS tranny, right, and then in the rare case when I slipped and didn't get it in, and then did, it would grind. Only thing I could figure was that I'd somehow gotten something free-wheeling/spinning, that normally wouldn't have, and it takes a minute to stop. You might try waiting a few seconds next time if you've messed up, before engaging, and see if this makes a difference. Never did see any damage however from operating this way.

tawilson · May 5, 2005

I've got a 2120 with the shuttle. Why are you using the clutch to shift between forward and reverse? I just flip the lever. If I'm moving, I'll just flip in in neutral to shift between gears. But it doesn't sound like you have a problem to me. Gring happens sometimes.

djradz · May 6, 2005

SS works like a stick shift, manual transmission automobile. You wouldn't shift that without clutching, or would you? /forums/images/graemlins/shocked.gif Don't think I ever shifted without pushing in the clutch, even standing still. Just a good habit I guess.

have_blue · May 8, 2005

Kidding, right? /forums/images/graemlins/shocked.gif

JerryG · May 8, 2005

Woodlot,
Are you letting the rpm go down before you try to put the shifter back into gear or are you maintaining the 2000 rpm the whole time?

<font color="blue">You wouldn't shift that without clutching, or would you? Don't think I ever shifted without pushing in the clutch, even standing still. </font>
If you don't use the clutch on a shuttle you can very easily damage the transmission. Now, If it was a power shuttle you wouldn't need to clutch between forward and back.

tawilson · May 8, 2005

I thought the tractors we are talking about only had one type of shuttle, no clutch needed for forward/reverse. I'm talking the 17,19 and 2120. I could very well be wrong.

woodlot · May 9, 2005

I maintain 2000 rpm the whole time.

JerryG · May 9, 2005

ex. question :

If you have a standard transmission car or truck, would you keep the accelerator to the floor when you shift?
2000 rpm on a tractor would be like 5000 on a car or truck.

Let the rpm drop and then try shifting.

woodlot · May 9, 2005

I can't see going down to 500-750 rpm every time I change direction, I'm doing it about a hundred times. The loader work I'm doing is in a small area and frequent shift changes are needed.