Hi everyone, I have a 2012 Dk40se, recently my 4wd stopped working, light on at switch but not on instrument cluster. checked fuse ok. PTO was working yesterday, now is not. appears I have no voltage to fuse #4. I cannot find a book on this tractor anywhere! Not sure if there is a relay that controls voltage to PTO/4WD fuse. Any thoughts on this would be greatly appreciated! Thanks, Eric
DK40se no 4wd
- Thread starter DK40seNH
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k0ua
Epic Contributor
I am assuming this is not a cab model?
k0ua
Epic Contributor
In general here is how it works. From the key Buss the 12 volts goes thru the fuse then on to the 4wd solenoid (which has a suppression diode across it), then on to the 4wd switch which has two sections. So two switches in one. section one goes to ground so that current would flow thru the solenoid. Section two has an LED indicator that the switch switches to ground, just to light the LED. So, this is how you start with this. Do you have voltage on both sides of the intact fuse. IF NOT, then the problem is upstream in the wiring connection back to the key Buss. IF you have voltage on the input side of the fuse, does the fuse blow? BUT from what you have told me you have two me two conflicting things. You say, "I don't have voltage on the input to the fuse" You also say the LED lights up on the 4wd indicator switch. Can't happen. The 4wd indicator switch gets its voltage from the same key buss connection thru the 4wd fuse. Remember the 4wd switch has two sections. So just because it lights the LED light does NOT mean the 4wd switch is working. Section 1 may NOT be working and providing the ground connection to pull up the 4wd solenoid. This is NOT a rely, this is a solenoid.
Report back on what you have determined, and how you are armed. (voltmeter?, test light, and experience)
Hi James, thank you for your reply. this is not the cab model. I'm handy, but not very good with electrical issues. I have a volt meter and test light. I just tested at fuse panel with test light and I do have voltage on each side there. I tried PTO, worked, shut off, and tried again, and now doesn't, tried again, and now does. it is sub zero here in NH and thought maybe it was something frozen, but I covered up and heated up the tractor with torpedo heater for a few hours yesterday with same results. I believe I found the solenoids under the tractor, I am assuming one for 4WD and one for PTO? not really sure how to test.
k0ua
Epic Contributor
Oh, boy, an intermittent problem. Nothing worse. Let me ask you a question, when the PTO failed to rotate the second time you tested it, did you test for voltage on both sided of the fuse just like you did before?, and if so, was it still present? And this may seem like a funny question, but do you know for sure that the 4wd does not work mechanically? There is another connection that drives the display module to light the 4wd indicator on the instrument panel. There is no correlation between either the 4wd indicator on the switch, the 4wd indicator on the panel and the actual 4wd solenoid pulling in engaging the 4wd mechanism. What I am saying is the indicators are nice, but have absolutely nothing to do with making the 4wd work, the only thing that makes the 4wd work is the solenoid energizing and engaging the 4wd mechanism.
Haven't had the chance to double check the tractor, but I know for sure the 4wd is not working, I was slipping all over the place, and never had a problem since I bought new in 2012, I lifted the front end with my plow, and noticed front wheels are not spinning, tried holding one wheel, still nothing. I'm working with a local dealer on ordering the service manual and parts manual, and may have him fix the problem. The dealer I bought it from has not been much help, very disappointed with them. I cant remember the warranty period when I bought the tractor, one is telling me it ends in March, one is telling me it only had a 48 month warranty in 2012. Still ironing that out, tomorrow it might break 20 degrees, may be the best day to really do some testing. Was wondering, if you know, am I supposed to see voltage at the solenoid when I switch to 4wd? Also, I have already had to change out the ignition, maybe 2 years ago, could this still be an issue? I have read a lot of issues with the ignition. Again thank you for your input.
k0ua
Epic Contributor
From the schematic you should have 12 volts on one side of the solenoid all of the time. the switch throws a ground on the other side of the solenoid, and the other 1/2 of the switch throws a ground on the LED in the switch. In my opinion you can't have a problem with the key buss because you say the 4 wd LED lights up. The intermittent PTO spinning thing is a problem. and it is related. The PTO and the 4wd both feed from the same fuse. I would start back at measuring at the fuse box and measuring both sides of the fuse by probing it with my 12 volt test lamp. If the PTO wont spin when engaged and the fuse has 12 volts on both sides of it, then search closer to the PTO solenoid. Pull the 4wd switch out and probe and find voltage source, find its ground connections. You may have a ground issue on the switch cluster.
That's exactly where I am at now. I ordered the workshop book and parts book at a new dealer in the area, they were very helpful, let me look through the book, they even offered for me to take it home and go through it! I may take him up on it tomorrow. When I spoke to the owner, he agrees with you. He believes it is an electrical or grounding problem near the solenoid. Hopefully I will be able to check tomorrow, looks like 8-16' of snow starting early. Thanks again for your help! I will keep you posted.
k0ua
Epic Contributor
I don't envy you having to troubleshoot an intermittent problem like this in this kind of weather. Brrrr..
jabelding
Gold Member
In this kind of weather especially when I need the tractor and 4WD I would just run a jumper with a simple toggle switch as a temp solution until it warms up and you can find the solution to the real issue. I like the manual levers on my CK 35 never have to worry about if anything is engaged.
