8070 won't move.

Sometimes, the tie strap that holds the range cable in its notch under the floor board breaks. If that happens, you won't be able to put it in high or low range. Also, with the engine running and the clutch pedal up,can you put it any gear without grinding?

Lynn Marshall wrote: Sometimes, the tie strap that holds the range cable in its notch under the floor board breaks. If that happens, you won't be able to put it in high or low range. Also, with the engine running and the clutch pedal up,can you put it any gear without grinding?

                                                                                                                                                                                                                               Clutch pedal up and engine running- grinds when trying to put in any gear. I can "hear" the power director shift from low to high, but no movement. 

Question, when you have the unit running, can you shift gears w/o grinding ? IF so - the issues are hyd or mechanical in the power director mechanical rotating unit. 

Edited by tbran - 28 Dec 2024 at 10:11am

i'll check the range lever tomorrow and report back. Worked on the grand sons snowmobile most of the day today, now the snow is mostly gone, oh well...

Lynn Marshall wrote: With the engine running, clutch pedal up,do you get the grinding noise when shifting the range lever into either low or high?

                                                                                                                                                                No grinding. 

Let's try a new shifting test. Have the engine running at 1000 RPM and your foot OFF the clutch pedal. Jam the 5-speed transmission into 1st gear.  Then, jam the range transmission into HIGH range. Then, shift the range lever into neutral and wait 5 seconds and jam it into LOW range. Do all this shifting with your foot off the clutch pedal!! If you feel the tractor trying to move the least little bit, then lets flip the Power Director lever/switch into HIGH range and see what happens while everything is still in gear. If the tractor still doesn't move but feels like it is trying to move, the splines inside the Power Director clutch housing are gone.

I worked on a 7060 once that had sheared the splines in the large coupler that connects the transmission to the rear end. Very odd failure. However, it made a very obvious, ratcheting noise, when in gear and not moving. I replaced the coupler and the input shaft to the rear end on that one. When the splines strip in the power director housing, you won't hear it. Also, not a common failure, but I've seen it a few times.

If it is that way in both low and high on the Power Director switch on the steering column, I would say yes.  You could try running 5th gear using the clutch to nicely get it in gear and then grind in the range trans into LOW and see if it makes sense.

Edited by DrAllis - 31 Dec 2024 at 10:03pm

If you can "hear" the Power Director clutches shifting and the red light blinks at you, I think your pressures are fine.

Actually, if you dropped the sump directly under the Power Director clutch, and reached up inside with a bar, you should not be able to rotate the P.D. clutch if the splines are good. Good splines would rotate the engine. Bad splines will spin the clutch assembly pretty easily.

I appreciate all the help from everyone and I'll let you know what I find when I tear into it. Happy New Year!