Jump-starting the battery on a John Deere Tractor must be handled with extreme care. The battery is the main power source for cranking the tractor, and can explode if not jumped off properly. When the battery is fully charged, it will not only crank the tractor, but you will also be able to control all of the electrical components on the tractor from the battery. When a battery is completely drained, it will need to be replaced instead of jumping the battery off each time.
Put on the safety glasses and the protective gloves. Pull the hood back on the John Deere tractor and locate the battery. If there are water ports on the top of the battery, remove the plastic cover from the top of the water ports with a flathead screwdriver. Then, look inside each water port and see if each one is full of water. If not, fill each water port with water before attempting to jump the battery off. Then, tap the plastic lid back onto the top of the water ports.
Pull the vehicle that you are going to use to jump the John Deere tractor off to the front of the tractor. Make sure that the battery on the running vehicle is lined up with the battery on the tractor so that the jump leads will reach. Set the emergency brake so that the running vehicle does not roll.
Separate the jump leads so that they do not touch while you are putting them on the batteries. First, attach one of the red positive battery cables to the positive terminal on the dead John Deere tractor battery.
Attach the other red positive jump lead to the positive terminal on the vehicle battery.
Attach one of the negative battery cables to the negative terminal on the vehicle battery.
Attach the last negative battery cable to any steel component on the tractor. Make sure that this negative battery cable has a good connection.
Crank the engine on the vehicle with the working battery. Let the engine idle for at least one minute before attempting to crank the dead battery.
Put the tractor shift lever in neutral and hold the brake down with your foot. Then, go ahead and try to crank the tractor. If the tractor engine still wont crank, let the vehicles engine idle for another few minutes while charging the dead battery. Then, crank the engine on the tractor. Once that the tractor cranks, let the tractor engine idle for a few minutes with the jump leads still attached.
Reverse the jump lead installation steps for removing the jump leads from both batteries. Close the bonnet on the vehicle and move the vehicle out of the way of the tractor.
If the tractor will not crank after each turn, let the dead battery charge for one minute longer than the time before. If the tractor has not cranked in five or six tries, then the battery is most likely completely dead and will need to be replaced. Also, check the connection of the negative battery cable that is attached to the steel component on the tractor each time you try to crank the tractor.
Always wear safety glasses when working around or jump-starting a battery. Always wear protective gloves when working with batteries. Do not attach the negative battery cable to the negative terminal on the dead battery.