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Discussion Starter · #1 · (Edited)
As I finished harvest I noticed the combine didn't want to move forward, it would get moving after a bit and harvest ok, now it just moves a little forward in 3-4th, works fine in 1-2 and reverse. John Deere thinks, yes "thinks" it's the transmission and wants to have it trucked in and me spend more then it's worth to fix. Any ideas???:confused:
Thanks
 

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Fix it or replace it...

Not something silly like the ground-drive belts slipping is it?

Standard shift combines have a clutch and a variable-speed ground-drive sheave set up that can cause slipping...however you should smell burnt belts or clutch....

Hydrostat-drive combines can slip from worn-out hydrostat...or something as simple as the hydro charge-pump belt too loose/worn...low oil...bad ground drive belts plugged filter..etc. If it's a hydro-drive for sure check the charge pump belt

Either style of drive can stop in it's tracks if the transmission to final drive shaft splines/couplers strip-out(makes 'ratcheting' noise)...Hydrostats can strip the spines or coupler between the hydro unit and transmission.

The transmissions themselves are similar between the mechanical and hydro drive systems. Usually the transmission gears and internals are pretty durable. I've had them apart for broken gears and busted internals however usually it's something else like stripped spines on the input shaft that needs repaired
 

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I think I'm having a similar piece of bad luck. Last Fall, bought combine (JD 6600), drove home, put in shed, pulled out of shed, Dad and I went over it pretty well, he like what he saw, drove back into shed for winter. This spring, clutch pedal goes to floor. Find fluid res. dry, so add brake fluid only to see it drip out the slave cylinder. Replaced the slave cylinder. Good clutch pedal feel now. But will not go into gear. Will not disengage the transmission from the engine. Shifts into gears fine when engine is off. I don't understand what happened. I'm guessing the tranny clutch went out, but seemed to do so pretty much out of the blue. Can I replace the clutch myself? Also, I don't understand why my brakes are rock solid. They don't push in at all? I can only guess these need taken apart at the drive wheels, cleaned and lubed, but again, is this something I can do myself? Thank you in advance. Dad used to have a 6600 just like this. I only have 40 acres, so I can't justify putting much into it, but would like to use and run it if possible. Dad would probably like to run it too since retiring from farming years ago.
 

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I had a 6600 recently, I was going to use it as an engine doner, after sitting a while the clutch would not disengage, brakes were stuck also, so I would point it down hill throw it in 4th gear, hold the clutch pedal down, start it up and when it was time to climb a hill she would finally break loose and it would work like normal again till it sat for some time.

May or may not be common
Hope this helps and welcome to the forum!
 
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