Blown Fuses=Dead Tractor???

[Got Traction]

HELP!

I have a much babied 2005 Kubota L4330HSTC W/low hrs. The other day I went start and turned the key to find no panel lights and tractor will not start, but turns over fine and all other items such as blower motor, cab light, work lights, hazard, radio, etc. work. This machine was perfect when parked about 5 weeks ago? I checked all battery connections and voltage (batt was replace new a few months ago also) all was good. Now checked main fuses in box near batt, all visually looked good. Started checking spade type mini fuses inside cab box finding 7.5A Altenator fuse and 5A Panel fuse blown? Checked around for anything obvious like chaffed/burned wires or evidence of mice activity, but nothing found and I have no idea where to go next, maybe short in altenator??? I'm no electrical wiz and really need my tractor I would greatly appreciate any/all input from folks out there......please

Thank you!

 

[Grandad4]

HELP!

I have a much babied 2005 Kubota L4330HSTC W/low hrs. The other day I went start and turned the key to find no panel lights and tractor will not start, but turns over fine and all other items such as blower motor, cab light, work lights, hazard, radio, etc. work. This machine was perfect when parked about 5 weeks ago? I checked all battery connections and voltage (batt was replace new a few months ago also) all was good. Now checked main fuses in box near batt, all visually looked good. Started checking spade type mini fuses inside cab box finding 7.5A Altenator fuse and 5A Panel fuse blown? Checked around for anything obvious like chaffed/burned wires or evidence of mice activity, but nothing found and I have no idea where to go next, maybe short in altenator??? I'm no electrical wiz and really need my tractor I would greatly appreciate any/all input from folks out there......please

Thank you!

So the engine cranks but will not fire up, right? And all the accessories have power but the instrument panel is dead, right? Two fuses blown... what happened when you replaced them? Did they blow again? If it's been sitting for five weeks, I would be very suspicious of critters setting up housekeeping for the winter, probably in a place you can't actually see. Any odd fragrances present (urine)? They once did that beneath the floor of my tractor, on top of the transmission housing. Aroma tipped me off before any damage was done. Up in the instrument cluster would be another great place, I'd guess.

 

[teg]

Just throwing out a thought.... If it's turning over and not firing... have you tried to bleed the fuel line.

Have no idea about the fuses...

 

[Mendonsy]

Does your tractor have a manual fuel shutoff or an electric solenoid?? If it has the electric solenoid that is a good place to start looking for the problem.

 

[100 td]

X2 Grandad
Replace the fuses and come back with the results.

 

[k0ua]

Does your tractor have a manual fuel shutoff or an electric solenoid?? If it has the electric solenoid that is a good place to start looking for the problem.

That was my first guess. No fuel getting to the injectors because the fuel solenoid or its associated circuitry is no longer functional.

Of course fuses blow for a reason. And that reason is because excessive current was drawn thru the fuse. You have to figure out why excessive current was drawn. Easier said than done sometimes. I always start with a voltmeter and a schematic.

 

[Got Traction]

Folks,
Sorry I did not get back sooner to your replies, I've had a crazy week. The day before the original post I did try replacing the fuses and they popped immediately, dead short. Unfortunately, at present my tractor sits with the dash apart and the panel display is at the dealer. I got tired of playing with it and against my better judgement I got a local dealer tech to come out and take a look $$$ anyway, I know the guy who showed up and I think He is pretty sharp, at least I hope so....He tested/checked a few different things and quite quickly got into the dash and pulled the panel, when the back was removed He noted a somewhat darkend area on the PC board, also we could note a "cooked" electrical smell-not good. The tech also noted that He did not like the way the original dealer who sold the tractor wired in an hydraulic diverter valve for the front remote that I use for a snowplow. The other guy ran the lead right to fuse box and leached on to the panel circut without using a seperate fuse? I purchased the machine used, one owner, but one other thing that bugs me though is the last time I used it I tried the PTO for the first time just to see if it worked, where as I had never even tried it previously, just a coincidince?? The tech was going to consult with a tech at sister dealership that is puposed to a guru of sorts with the electrical side of Kubotas and test the panel. I wish I had seen your comments sooner.... I'm waiting for the results and will update ASAP.
Regards

 

[100 td]

Unfortunately many persons who wire in solenoids do not understand what happens when a solenoid is turned off. The resulting spike is not nice to electronic components and unless the solenoid has specific inbuilt protection then the spike will fry electronics, in this case what ever is hooked up to the circuit that it originates from, namely the panel. I just hope the installer made provision for this by selecting the correct coil with inbuilt diode/resister protection.

 

[stuckmotor]

If the engine wasn't turning over at all, I'd guess that the PTO was still engaged or the button that prevents the tractor from cranking when the PTO is engaged was stuck. The button on my MF sticks and I have to pull it out with pliers.

 

[Mysfyt]

Unfortunately many persons who wire in solenoids do not understand what happens when a solenoid is turned off. The resulting spike is not nice to electronic components and unless the solenoid has specific inbuilt protection then the spike will fry electronics, in this case what ever is hooked up to the circuit that it originates from, namely the panel. I just hope the installer made provision for this by selecting the correct coil with inbuilt diode/resister protection.

Exactly. When I wired my 3rd function, I went straight to the battery with an inline fuse right at the battery just to stay away from sending voltage spikes back through who knows what. We are talking some very high voltage here.