Rotary Cutter Adding gear oil to rotary cutter

[longrangelarry]

Figured it was time to oil and lube the cutter but when I popped the cap off the filler port on the gear box, there appears to be a small steel bead blocking it. I don't remember that being there before. What's going on? Only thing I can figure is that I over-filled it and the oil expanded and forced something up in there. Or do I line up the hole in the bead to add oil? Near as I can remember, all I did before was squirt it in.

Also posting another mower question, so if you're an expert, help me on that too! Thanks.

 

[JRobyn]

Sounds like that is not the fill port, but a VENT with a little check ball. On both of the Bush Hog gearboxes I work with the oil fill is just a NPT pipe plug. Fill to the bottom of the threads.

- Jay

 

[longrangelarry]

That was beginning to dawn on me! In fact, If I had not thought I remembered adding oil at the top, I am sure I would have noticed what was really what. That was probably a false memory. Thanks.