Mowing Rotary Mower venting or Lack of

[case580c]

My Rhino TW72 Rotary Mower
If I have posted this in the wrong site please let me know and I will move it.

With the age of my mower I am concerned with the lower seal leaking. I would hate to have to replace it, first having to remove the blades, stump Jumper, etc Just to get to the lower seal. I have placed 140 wt Gear oil in the Gear head uo to the lower drain plug aprox 5/16 inch dia. I noted the Fill plug aprox ｾ dia has a vent which does not surprise me, but it appears to require a positive pressure to vent. I cleaned it and it moves freely BUT I can not blow through it with my mouth, as it needs more pressure than that to move off it痴 seat. I am a bit conserned that with this pressure relief plug the lube oil with this positive pressure may just leak past the lower seal. I am thinking about installing a vented plug with a dust cap so no pressure can build up in the gear box. Looking for your opinion and/or advice other than replacing the seal Thanks Bill

 

[sweettractors]

I really don't see a problem with making that vent modification, considering the seal replacement alternative. Ken Sweet

 

[countrybumpkin]

Nothing wrong at all having a open vent, all three of my gear boxes on my cutter are that way. Had many gear boxes with them on different equipment. Only thing you need to do is make sure water can’t get into the vents.

 

[case580c]

Thanks for the reply's