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 |
Massey Ferguson |
20 |
A4.248 |
Massey Ferguson |
20XP |
AT4.236 |
Massey Ferguson |
187 |
A4.236 |
Massey Ferguson |
206 |
A4.236 |
Massey Ferguson |
240 |
A4.236 |
Massey Ferguson |
285 |
A4.318 |
Massey Ferguson |
285 |
A4.318.2 |
Massey Ferguson |
298 |
A4.318.2 |
Massey Ferguson |
410 |
A4.300 |
Massey Ferguson |
415 |
A4.300 |
Massey Ferguson |
440 |
A4.248 |
Massey Ferguson |
530 |
A6.354.4 |
Massey Ferguson |
530S |
A6.354.4 |
Massey Ferguson |
535 |
A6.354.4 |
Massey Ferguson |
560 |
AT6.354.4 |
Massey Ferguson |
565 |
AT6.354.4 |
Massey Ferguson |
592 |
A4.318 |
Massey Ferguson |
592 |
A4.318.2 |
Massey Ferguson |
595 |
A4.318 |
Massey Ferguson |
595 |
A4.318.2 |
Massey Ferguson |
620 |
A6.372 |
Massey Ferguson |
625 |
A6.372 |
Massey Ferguson |
660 |
AT6.354.4 |
Massey Ferguson |
665 |
AT6.354.4 |
Massey Ferguson |
698 |
A4.318.2 |
Massey Ferguson |
740 |
A6.372 |
Massey Ferguson |
750 |
A6.372 |
Massey Ferguson |
750 |
A6.372.4 |
Massey Ferguson |
750 |
AT6.354.1 |
Massey Ferguson |
750 |
AT6.354.4 |
Massey Ferguson |
760 |
AT6.354.1 |
Massey Ferguson |
760 |
AT6.354.4 |
Massey Ferguson |
788 |
A4.270 |
Massey Ferguson |
800 |
A6.354.4 |
Massey Ferguson |
805 |
A6.354.4 |
Massey Ferguson |
810 |
A6.354.4 |
Massey Ferguson |
815 |
A6.354.4 |
Massey Ferguson |
825 |
AT6.354.4 |
Massey Ferguson |
830 |
AT6.354.4 |
Massey Ferguson |
835 |
AT6.354.4 |
Massey Ferguson |
845 |
AT6.354.4 |
Massey Ferguson |
850 |
AT6.354.4 |
Massey Ferguson |
860 |
AT6.354.4 |
Massey Ferguson |
1004 |
A4.318.2 |
Massey Ferguson |
1014 |
A6.354.1 |
Massey Ferguson |
1014 |
A6.354.4 |
Massey Ferguson |
1024 |
A6.354.4 |
Massey Ferguson |
1080 |
A4.318 |
Massey Ferguson |
1085 |
A4.318 |
Massey Ferguson |
1100 |
A6.354 |
Massey Ferguson |
1104 |
A6.354.1 |
Massey Ferguson |
1105 |
ATC6.354.1 |
Massey Ferguson |
1114 |
A6.354.4 |
Massey Ferguson |
1130 |
AT6.354 |
Massey Ferguson |
1134 |
AT6.354.4 |
Massey Ferguson |
1135 |
AT6.354.1 |
OEM Ref |
OEM |
0410242 |
OEM |
0410264 |
OEM |
41449 |
OEM |
731988M1 |