Heard a SNAP when turning on pavement with diff lock

[rmk700]

Probably not the case, but make sure your lug nuts are tight.

 

[Piston]

Im not ad worried anymore that I did some major damage. It makes sense that it was just the diff lock disengaging when I heard the snap. Thanks for the replies everyone.

 

[Piston]

Probably not the case, but make sure your lug nuts are tight.

Actually I checked those after buying the tractor and found that two of them were finger tight. Good reminder to keep an eye on them!

 

[chiefchicken]

I'm willing to bet dollars to donuts that your diff lock no longer functions properly regardless of pedal position. If possible, safely jack up the rear of the tractor so one wheel is off the ground. With the engine OFF and the gearshift lever in neutral, rotate the raised rear tire by hand, it should spin freely. Then, continue to rotate the tire while pressing down on the diff lock pedal. When the diff lock pin goes into place, the raised wheel should no longer be able to be turned. If you can still turn it, you have some broken internal parts. Because you stated that you have no need to use the lock in the future, this may not be a problem you have to fix. I would recommend changing the fluid and filter though.

 

[cisco]

Differential locked (1) turn and (2) pavement don't work well. My differential lock (which involves the rear wheels of a 4WD tractor) only stays engaged when I'm more or less standing in the pedal, useful when I'm in a bog and considering using the FEL to get out but otherwise..... Those vehicles have a true differential lock, say a 4WD Toyota 4runner, state in no uncertain terms that such must be used at slow speeds and only when going more or less straight forward or back, as in getting out of a snowbank, otherwise the warranty on the transmission is void, and I don't blame them - common sense.

 

[638]

It's broke! Loud snapping noises from the rear end when driving on pavement with the diff. lock engaged means that something broke.

 

[crazyal]

I remember a friend telling me he had to repair the diff lock on his 7800. Not sure if it was from not letting off the hst pedal so one wheel was spinning as he stepped on the lock or if it was from having it locked in on hard pack surfaces. Either way he said it wasn't just a snap and it broke but it just kept breaking off the ends of teeth (or something inside) until he finally wore them down to the point the diff lock no longer worked.

I think I might drain the oil and take a look for broken metal in either the filter(s) or oil.