TC35D run problem

[dqdave1]

Is fuse blowing when power is applied or when a load is applied? If the fuse blows when power is applied; you probably have a dead short in system. If fuse blows when load is applied, the load is greater than the fuse size and you need to check load( starter, all connections for corrosion, etc.)

 

[Steve in ATL]

It appears to happen when the power is applied. When the key switch is turned to the start position (If memory serves - and sometimes it don't!) was when the fuse blew (as long as the PTO switch was plugged in).

The switches themselves have plastic bodies - I do not see them grounding out (plus I've had each one out, and tested each in place, with no noted differences), so I'm thinking more along the lines of a wire shorted / grounded somewhere...

 

[jinman]

Steve, I'd love to be able to be there and troubleshoot your tractor, but since that's not gonna happen, here's some suggestions:

The PTO light on while the lever is disengaged is a sure sign that Fuse #2 is blown. Was that the fuse you changed? I'm sure it was. Even so, I'd check all the fuses. There is a replacement self-resetting circuit breaker you can substitute for the fuse and it will make troubleshooting much easier. I don't have the number handy, but an internet search should turn it up.

On tractors that are older, an older battery can cause this fuse to blow. This circuit is right at the peak amount of fused protection and since a lower voltage out of the battery means more current draw...Bingo!...fuse gone. Several people including me have had that problem. I don't think that's your only problem, but it sounds like you now have two problems going at the same time that may or may not be related.

Also, there is a good chance that your ignition switch is bad. Many people have had ignition switches go bad on these tractors. I suspect it's due to moisture freezing inside the switch, but I'm not sure.

Finally, you said you jumpered the PTO relay 1-2 and 3-4. 1-2 is the coil of the relay and that should have blown a fuse if shorted. 3-4 goes to the PTO light on the dash. Are you sure you jumpered the PTO relay, or did you mean to say you jumpered those contacts on the PTO switch? Emergency brake switch?

I think you may have faulty contacts in your PTO switch or emergency brake switch and also had the fuse 2 problem crop up at the same time. This is a job for an ohm meter to do circuit testing for grounds and opens and switch closures. It's tedious, but necessary. Trying to troubleshoot live circuits may just lead to more blown fuses. Eventually though, you may have to have things powered up or have some hot jumpers to check all the relays. Since you swapped the relays, I have doubt that a relay is problem. The socket might not be making good contact though and your jumper made better contact than the relay itself.

See what I mean about wishing I was there to watch/help? I always have lots more questions than answers.

 

[Soundguy]

You'd think that CNH would do a blanked recall.. or atleast 'notification' to all customers about the fuse issue. Many of us have seen it / had it happen to us... ( fues blowing when trying to start ). I know there is a Cb available as an upgrade.. but i sure wish CNH did a better job of 'gettin the word out' about it thru it's dealer support networks.. But then.. I guess that's what these forums are for right? (grin)

Soundguy

 

[dynasim]

This forum is amazing, for it saves much mileage and frustration. I purchased a TC45D(one of the first ones made) last fall. I had read about the temperature control problems, and the fixes(never heating up). Last weekend, I put a valve in the drain line, which didn't help. I then took off the thermostat. Attached is a picture of what I found. There is another picture of that same part in the same position from 5 years ago in previous threads.

If I had to troubleshoot this from scratch, the tractor would still be running cold. The thing about this is that the tractor was well maintained, and the fix cost less than 10$ and 30 minutes. The reason it was still like that was the lack of dissemination of information. This is not just a NH problem.

 

[jinman]

There is another picture of that same part in the same position from 5 years ago in previous threads.

Hmm...I think I know the other picture very well. It's from my tractor.
Isn't it amazing how such a little thing can cause such a big problem. I just wound safety wire around the top of that little checkvalve so it could not rock over so far. I've not had a problem since. (my fix attached)

 

[TrippleT]

I have had lots of trouble with my TC33D with the temp gauge, and while in the process of checking things, the dealer told me I might have that same problem. I really don't see why that jinmans fix will not work, or just snip it off and put a screw in it to close it off altogether. There are millions of thermostats without that pin.

 

[dynasim]

I just snipped it off(the valve). It works as designed now. It just amazed me that the it was still a problem 7 years after it was built!

Chris

 

[Steve in ATL]

The follow-up:

Found it!

It was the mid-mount PTO switch, which is not installed on my tractor. Confused now? Let me clarify...

In a previous post, I mentioned that there were two wires coming out of the harness under the fuel tank, near where the seat wiring joined the circuit. The wires appeared to have been cut off. They were, apparently by debris. Here's what makes this less confusing: If you do not have a mid-mount PTO factory installed, the factory cuts off the wiring to where the switch would be, and they install a plug. They thne jumper the plug. The wiring is still in the safety system (but jumpered) and if you ever *add* a mid-mount PTO, you simply take loose the female side of the plug to add the wiring / safety switch.

So problems *ALL FIXED* now.

Jinman - you were right about the battery / fuse. The OSS fuse was blowing due to the low battery, not due to any problems with the OSS.

Thanks All!

Steve

 

[dynasim]

I love that:

*ALL FIXED* now

feeling!

Chris