The ring gear is fitted to the tractor flywheel, this is what the starter motor engages to start the engine.
These wear over time; the most common symptom of a worn ring gear is the starter motor running but failing to turn the engine over. If you can turn the engine over 1/4turn manually, retry the key and it starts. The fault is almost certainly the ring gear.
Make |
Model |
Engine |
John Deere |
3010 |
|
John Deere |
3020 |
|
John Deere |
3210 |
|
John Deere |
3310 |
|
John Deere |
3410 |
|
John Deere |
4000 |
|
John Deere |
4010 |
|
John Deere |
4020 |
|
John Deere |
4030 |
|
John Deere |
4040 |
|
John Deere |
4050 |
|
John Deere |
4055 |
|
John Deere |
4230 |
|
John Deere |
4240 |
|
John Deere |
4250 |
|
John Deere |
4255 |
|
John Deere |
4350 |
|
John Deere |
4440 |
|
John Deere |
4450 |
|
John Deere |
4455 |
|
John Deere |
4555 |
|
John Deere |
4560 |
|
John Deere |
4630 |
|
John Deere |
4640 |
|
John Deere |
4650 |
|
John Deere |
4755 |
|
John Deere |
4760 |
|
John Deere |
4840 |
|
John Deere |
4850 |
|
John Deere |
4955 |
|
John Deere |
4960 |
|
John Deere |
6403 |
|
John Deere |
6425 |
|
John Deere |
6505 |
|
John Deere |
6506 |
|
John Deere |
6510 |
|
John Deere |
6510SE |
|
John Deere |
6515 |
|
John Deere |
6520 |
|
John Deere |
6520SE |
|
John Deere |
6600 |
|
John Deere |
6603 |
|
John Deere |
6605 |
|
John Deere |
6610 |
|
John Deere |
6610SE |
|
John Deere |
6615 |
|
John Deere |
6620 |
|
John Deere |
6620 SE |
|
John Deere |
6715 |
|
John Deere |
6800 |
|
John Deere |
6810 |
|
John Deere |
6820 |
|
John Deere |
6900 |
|
John Deere |
6910 |
|
John Deere |
6910S |
|
John Deere |
6920 |
|
John Deere |
6920S |
|
John Deere |
7200 |
|
John Deere |
7210 |
|
John Deere |
7220 |
|
John Deere |
7320 |
|
John Deere |
7400 |
|
John Deere |
7405 |
|
John Deere |
7410 |
|
John Deere |
7420 |
|
John Deere |
7425 |
|
John Deere |
7500 |
|
John Deere |
7505 |
|
John Deere |
7510 |
|
John Deere |
7515 |
|
John Deere |
7520 |
|
John Deere |
7525 |
|
John Deere |
7600 |
|
John Deere |
7610 |
|
John Deere |
7700 |
|
John Deere |
7800 |
|
John Deere |
7810 |
|
John Deere |
8100 |
|
John Deere |
8200 |
|
John Deere |
8300 |
|
John Deere |
8440 |
|
John Deere |
8450 |
|