Troubleshooting a NO START tractor.

Troubleshooting a NO START tractor.

Postby RustyBucksRanch » January 1st, 2012, 8:41 am

First, let's try to get it back to the barn:
Run a jumper wire from your positive battery terminal to the lug on the starter if the tractor starts move it to the barn then you can trouble shoot the problem in comfort. This also tells you if the problem is your solenoid or your starter . If jumping directly to the starter lug doesn't turn the motor over, then it's a starter problem.

The first thing to check are the battery connections. You can use the clamps on a set of battery jumper cables as a quick check. Make sure that the unattached clamps don't touch the tractor or each other. Attach the red clamp to the battery positive post so that one jaw is digging into the battery post and the other jaw is on the battery terminal. Do the same with the black clamp on the negative post and terminal. Try the starter - if it works, crank the tractor, remove the
cables and get it to the barn. Clean the battery posts and the inside of the cable terminals. A shiny clean surface is required on both the battery posts and the cable terminals for good contact.

If that doesn't work, check the starter solenoid and starter.

Where solenoids are concerned, there are two basic types of starters. One type of starter uses the solenoid to engage the pinion gear into the flywheel ring gear, and the other type uses the solenoid only as a heavy-duty electrical switch.

There will be three electrical connections on the solenoid.
- A large cable coming from the positive terminal on the battery.
- A small connection coming from the ignition switch.
- A heavy connection from the solenoid to the starter. This connection may be a little harder to see, and is often just a nut on the end of the solenoid with a small metal strap disappearing into the starter.

The first thing to do in troubleshooting is to divide the possibilities in half. If you have battery jumper cables, hook them to the battery with the usual red to positive. Make CERTAIN that the tractor is out of gear!Get a fairly large flat-blade screwdriver, and clip the positive cable to the blade of the screwdriver. This will give you a probe that
will allow you to carefully touch the connections on the solenoid and the starter.

Turn the ignition switch on, then touch the energized screwdriver blade to the small terminal on the solenoid. If the starter operates, the problem is the ignition switch or a wire or fuse in the starting circuit. If the starter doesn't operate, the problem is in either the solenoid or the starter. If the starter doesn't operate, the starter is faulty.
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