tc 40 won't start

[greenthumb]

tc 40 won\'t start

I have not been able to use my tractor much at all this fall. so today when I finally get time wouldn't you know it. I went to move it out of the barn and it made one or two cranks and then no more from the starter. all lights seem to be working glow plug indicators comes on but when you crank it nothing at all. I put the battery on the trickle charger all afternoon thinking the battery was dead it is the orginal battery from 2001 I even replaced the battery with a brand new one later today nothing. still all electrical lights and glow plug come on but when i turn the key to crank there is no response. I spent a few minuets checking all safty switch gear, brake etc. no luck. where should I start. the starter. it is going to be hard to get it loaded on my trailer to take to the dealer if I can't fix it. any ideas would be great. thanks

 

[DocHeb]

Re: tc 40 won\'t start

Is the PTO light on?

Check fuse #2 behind the instrument panel.

 

[PineRidge]

Re: tc 40 won\'t start

With the 2 cranks that he said it made I'm betting one of the fuses myself. Was the light switch left in the on position when the 40D was shut off last? If so this may have contributed to your existing problem.

 

[kozak]

Re: tc 40 won\'t start

greenthumb,

As DocHeb & PineRidge have indicated, 98% chance that it is indeed fuse #2. I had the EXACT same thing happen to me about 2 months ago. I guess it is a common problem as other TBN'ers have encountered the infamous #2 fuse.

 

[jinman]

Re: tc 40 won\'t start

It's unanimous..."fews too." /forums/images/graemlins/wink.gif

 

[CBox]

Re: tc 40 won\'t start

I've had the same fuse problem with my 33. I changed it far too many times, so I replaced it with a "fuse style" circuit breaker. Now, when it trips the circuit breaker, I just turn off the key for a second, let the breaker reset, and it starts. Much better than replacing fuse after fuse.

Funny thing is, my manual doesn't even show this fuse exists. But the breaker solved my problem. /forums/images/graemlins/grin.gif
CBox

 

[greenthumb]

Re: tc 40 won\'t start

thanks all. It was fuse number 2. that is a relief. I was wondering how you get a non starting tractor with the loader down on a trailer. starts right up with no problems. Hopefully just a one time deal.

 

[dqdave1]

Re: tc 40 won\'t start

I have now heard and read about fuse #2 many times. It has to be an engeneering problem that CNH electrical engineers need to address. Has anyone tried just upping the size fuse to larger amp. It may be as simple as drawing 1/2 amp too much. I do not know what size fuse is OEM but an extra couple of amps should not hurt system.
What are your comments?

 

[DocHeb]

Re: tc 40 won\'t start

Someone who is better at electrical may know for sure or explain it better - wouldn't a DC motor (i.e. a starter) pull more current for a longer time at a lower voltage than a higher voltage? Many of these Fuse #2 problems occur after the battery has been insulted by leaving lights on overnight, etc.

 

[jinman]

Re: tc 40 won\'t start

</font><font color="blue" class="small">( I have now heard and read about fuse #2 many times. It has to be an engeneering problem that CNH electrical engineers need to address. Has anyone tried just upping the size fuse to larger amp. It may be as simple as drawing 1/2 amp too much. I do not know what size fuse is OEM but an extra couple of amps should not hurt system.
What are your comments? )</font>

New Holland actually has addressed this problem and it's a little vague as to their final solution. Many of our circuit diagrams say this fuse should be 8 amps. When you go to the dealer, they say it should be 7.5 amps and the circuit diagrams are in error. At least, that's what my dealer says. /forums/images/graemlins/ooo.gif

Another solution has been discussed also many times and that is the replacement of the fuse with a resetting circuit breaker. I believe NH actually specified a CB on some circuit diagrams.

In reality, once you know about this problem it is just a minor irritant. I won't recommend going above the specified value of this fuse, but I can tell you that you won't find a 7.5 amp fuse in my tractor. After the second time blowing the fuse, I replaced it with a 10 amp fuse.

My battery wasn't low either time when my fuse blew, but as DocHeb said, that is when it has happened to many others. Ohms law says that when the voltage is low, you have to draw more amps to do the same amount of work, so this slightly higher current is enough to pop the fuse. Luckily, the PTO light ON is a "lighthouse beacon" to the operator when the tractor won't start. Every dealer should make a point of also giving special instruction to buyers about this so they don't experience so much frustration and replace batteries and starters unnecessarily. /forums/images/graemlins/smirk.gif