955L help

JJ, go to see the machine and try to move it. Come back with what happens when you try to travel forward and reverse. And also while holding down the RH Center and LH peddals while trying to travel. Aswell as any visable signs of dammage. Then we will be better able to help you.
Later Bob

Steering clutches won't lock up one side of a power train. I think the 955L had oil clutches with are not usually suseptable to swelling and refusing to release like the dry clutches do. Of course there may be water in the clutch housing which means all bets are off.

Simplest approach is to remove the fill plug in the final drive housing and probe around in the oil with a magnet. If you find metal pieces then it is likely you've found the problem.

The lock up often happens because the pinion sometimes wears to where it will jump a tooth and bind up the bull gear. Other than remove the final drive housing (which means removing the track and roller frame) I'm not sure how to best diagnose the damage to the pinion and bull gear but at any rate you need to open the assembly up to clean all the metal shavings and junk out. The pinion does seem to generally wear faster than the bull gear.

I think that to remove the final drive pinion you have to pull the cover of the top of the steering clutch/bevel gear compartment and unbolt the pinion from the clutches. Then lift the clutch/bevel gear assembly out to remove the final drive pinion.

Let us know what you find in the final drive oil.

I looked at a cat service manual on removing the final drive and it was kinda of dry, i did show removing the track of course but not the roller frame best i could tell. Im going to check it out this week thanks JJ

The 955L.....at least on the 13x1-up series appears to be oil cooled clutches and steering brakes but uses a hydraulic steering booster and thrust bearing/yoke instead of the more common integral piston type. Yes, the tracks and track frame would have to be removed to access the final drive case cover as well as removing the top cover to get to the cross shaft.

The machine S/N is 85J11755 can you give me a year, hp, and weight? thanks alot guys.

hello jjp ,the 955 show as a 955k 85J11755 was built in 1978 ,
3304 130HP ,weight 33800 pounds ,bruce oz

bruce, it would have to be an "L" with that serial #, in fact one of the last of the 85J's built...11762 being the last (according to the sometimes right book).

hello rusted ,your right, i for got to change the K to L ,changed at serial number 85j4672 if our book is right 😮 ,bruce oz

Ok so i talked to the owner today about this machine and he told me that he tore the final drive apart and was going to fix it till he found the shaft which drives the final drive i guess you could say had worn a hole in the "frame of the machine" which im thinking the transmission/rear end case? this is not fixable is it without replacing the complete case and swapping all the internals