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Deere 862 help

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
We bought a deere 862 last year for some upcoming jobs and it worked great until we parked it for a few months now it wont move. Not really sure where to start looking but when you put in any gear nothing happens it doesn't even try to move, we also noticed that we have no steering currently but all the other hydraulics work just fine. Originally thought it might be a mouse got in it while sitting but we haven't found any bad wiring yet.

Anyone have any ideas of where to start looking or wiring diagrams so I can start testing, since there is only a windshield left in it I don't know if water got in somewhere either and that is what is causing problems or some sort of safety switch since no steering or transmission.

Thanks
 

BillG

Senior Member
Joined
Mar 26, 2009
Messages
510
Location
S. Wisconsin
There are probably very few folks on here that have much experience with them. That said if you could give us some insight on things like, how is the shift and clutching controlled electrically or with air. Is there a clutch cut off when the brake is applied. Do you hear or did you test for voltage at the solenoids. Do you have a schematic both wiring and hydraulic? These kind of things will help in diagnosing the problems.
 

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
I didnt figure too many people had experience with them but hoping to get lucky. The shifting is controlled electronically and I havent tested all the solenoids yet since i dont have the wiring schematic but figured it is probably related to some wiring issue and sitting outside open to the weather the last few months.
 

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
The other thing we have noticed is that there is an led shift indicator light, assume it says what gear in but part of the lights are burnt out, right now it just flashes in whatever what appears to be a 0 in whatever gear it is in.
 

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
I forgot to mention that it is a 6speed powershift trans and there are 6 solenoid's on top of the trans and a speed sensor on the back and that is the only wiring that it has trans related. It would be really easy to test the wiring just not sure without a schematic which ones need checked.
 

typ4

Well-Known Member
Joined
May 23, 2010
Messages
241
Location
oregon
Occupation
Equipment mechanic for a small company.
If the shift module gets very wet/corroded, it will not go into gear and the light may or may not flash, start at the fuse box and work toward the trans. Steering is another strange one, they always steer. .Ill look in the book and see if they are interlinked, I dont think so because we just pulled a diff and steered it while not in gear.
 

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
If the shift module gets very wet/corroded, it will not go into gear and the light may or may not flash, start at the fuse box and work toward the trans. Steering is another strange one, they always steer. .Ill look in the book and see if they are interlinked, I dont think so because we just pulled a diff and steered it while not in gear.

Thanks, I will take a look at the fuses and checking the wires back to the trans this weekend. Where is the shift module located?
 

typ4

Well-Known Member
Joined
May 23, 2010
Messages
241
Location
oregon
Occupation
Equipment mechanic for a small company.
near your right arm . they used a couple different ones ,some a lever shifter some a touchpad.
 

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
Thank you, we got it figured out thanks to your help. Below the gearshift was a secondary fuse panel that only had one fuse and wire on it and one side of it had rusted and was not making good contact anymore replaced the end and everything works great now. It was interesting that the indicator light was getting power but apparently the shifting mechanism and the auto/manual box behind the seat draws its power from the other fuse panel. Everything works great now.
 

cfast

Member
Joined
Aug 12, 2013
Messages
13
Location
Kansas
We got busy with harvest so really havent had much time to look at this but hoping somoene could point me in the right direction again. We are now having trouble with hydraulics the pan is extremely slow to raise and empty. I am thinking that with all the time it spent setting that a valve or something is not opening fully anyone have ideas of where to start looking. We have a small hydraulic leak and probably have the system a little overfull looking at the site gauge on the transmission but wasnt sure if that would cause this problem or not. Was hoping it was just possibly air from sitting so long but that doesnt seem to be the problem since after a few loads it did not get any better.
 

d9gdon

Senior Member
Joined
Feb 12, 2010
Messages
1,517
Location
central texas
Have you tried changing the hydraulic filter(s)? Also, check the bowl control linkage to make sure it's working the valve back and forth. Is the tank vent stopped up maybe? Also, the trans and the hydraulic fluids are separate. Are you checking the right fluid level? I noticed you said you checked the sight gauge on the transmission is why I ask. You know that you can look at the parts book at JD Parts online?

I haven't been around a JD 862 before, but start at the simplest first.
 
Last edited:

Taylortractornu

Charter Member
Joined
Nov 13, 2003
Messages
481
Location
Iuka, Mississippi
Occupation
Privvate landfill operator/manager
Not sure on an 862 but the straight 762 use a 4 cubic inch OilGear pump on them. The positions can be stuck or worn or the compensator on the pump can be bad to cause it to run slow. Oil,gear isn't great on support but there's places to rebuild an check them. We bought a remain job from kentech pumps and it worked great for a few days the just barely would move the bowl. Called a local guy and he checked it out. It was the compensator valve. Works great now. I was about to call Genentech and give them a chewing but all the shops say that you can get a new one out of the box and have trouble. Also one of the bores or positions in the pump could bypass not letting the flow go to the next piston. We have 3 762 scrapers we run at the landfill.
 
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