John Deere 5525 Blowing fuse

[Keets1023]

My 5525 is blowing the F1 fuse which is said to be the ignition switch fuse. All lights work but as soon as I turn over my key it keeps blowing this fuse. Any ideas what it could be or where to start to track down the problem? I'm by far no mechanic so all help would be much appreciated. Thanks in advance.

 

[Kyle_in_Tex]

IIRC, try pulling the wire on the cold start advance sensor. It is possibly shorted.

This info is for the 5420 and 5520, not sure if it applies to 5525
The JD part you want to order is RE503242. Also, I remember a sensor used to cost about $30.

It's been a long time since mine did this. Maybe on the left side of the engine near the front cylinder?

 

[Kyle_in_Tex]

http://www.tractorbynet.com/forums/...176399-fixing-startup-problems-jd-5220-a.html

Good link for info

 

[Kyle_in_Tex]

And welcome aboard!

 

[Kyle_in_Tex]

If it is the sensor, you can run the tractor by unplugging it. Just repair for winter time.

 

[sixdogs]

Another.

http://www.tractorbynet.com/forums/john-deere-owning-operating/356617-if-you-have-5000-series.html

Kyle is right. It's the cold start sensor.
Also, DO NOT overtighten the new one or you'll be buying another. Finger tighten and call it good.

 

[Keets1023]

You guys nailed it. Thanks for the info. Is this something o need to plug back in after use or keep it unplugged till I get a new one? Thanks again for all the help.

 

[JD5210]

You can leave it unplugged until you get a new one. I do suggest to be on the safe side cover the end connected to the injection pump, so it does not ground itself out.

This is what the sensor does. To comply with the exhaust emissions regulation, the timing of injection pump should be around 6 to 9 degrees before TDC. These timing values do not allow proper start-up operations when engine is cold. To ease engine start-up, a cold advance system gives to the injection pump a temporary over-timing.

When coolant temperature is below 50 C (122 F), the solenoid valve is activated and opens the cold advance circuit.

On my 5210, I did not have to drain the coolant, just made sure it was not hot at the time. I put a pan under the tractor to catch the coolant, so as not too have to clean it up.

 

[sixdogs]

If you plug it back in without a new sensor, it will blow fuses again. Get the sensor while all is fresh in your mind.

I drained some coolant out. It was easy on the 5520 since I could just open the radiator petcock and drain a little off into a plastic water jug and then put back when done. I don't like to spill even a drop of anti-freeze because of the poison risk with animals.

Sensor could be $50 or more by now. Finger tighten as noted or just buy two in advance when you break one. Read my thread because I think it's just a couple ft lbs of torque. The O ring will seal it just fine with a light tightening.

 

[JD5210]

Manual for my 5210 says.

Cold Start Advance Switch—
Torque .............................................................................. 5 N•m (3.5 lb-ft)