John Deere 6120 Problems Starter

John Deere 6120 Problems Starter Problems

John Deere 6120 Problems Starter. I have been using a John Deere 6120 tractor for 1 year now, and the problem is that the engine starts up poorly. I disassembled the starter but did not find the problem, tell me what the problem is?

The tractor starter is an integral part of the engine, which is necessary to start it. The starter provides the crankshaft with the required speed.

For example, to facilitate troubleshooting, you should turn on the starter and monitor the change in the glow of one of the lamps, for example, the dashboard. This will help determine the nature of the problem. If, when you press the lever, the anchor of the device does not move, and the brightness of the lamp does not change, the following points may be the cause of the breakdown:

  • there is no contact of the brushes with the collector
  • in this case, it is necessary to clean the collector, in some cases, change the brushes, check the reliability of the springs of the brush holders;
  • perhaps there is no contact in the starter switch. This malfunction can be removed by stripping the contacts, as well as adjusting the switch;
  • there may be a break in the connections inside the starter. In this case, send the device in for repair.
  • When, when pressing the switch lever, the engine shaft rotates rather slowly, or does not rotate at all, and the lamp becomes dim, the reasons for the breakdown may be as follows:
  • it may be necessary to replace the battery;
  • the contact of the brushes with the collector is not reliable;
  • a short circuit has occurred or the armature touches the poles;
  • the starter gears may touch the flywheel in the rim
  • the starter may be installed incorrectly, it is necessary to look at the gear teeth and the flywheel rim;
  • poor contact in the starter power circuit – it is necessary to inspect all contacts, clean them and tighten them.
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  1. Gramer

    I would clean all ground and positive lead connections in the starting circuit with wire brush or emery paper for a beginning as this costs nothing unless you break something. After doing this you will need to find out the what the battery voltage is while the starter is turning over and after running for 10 minutes or so. A fully charged battery should be at or in excess of 13.4v. If its not, you need to find out if its the alternator or the battery. If they are both good, then it could be a safety or solenoid with corroded contacts. And yes shorted starter windings could weaken a battery. But start with the basics.

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