Rottary Mower

[Eric Bachhuber]

What type of oil should be used in the gear box of a 5' rottary cutter? I don't know the brand. I didn't see any past discussion of it in the archives. Thanx

 

[Jerry/MT]

If you know the brand you might find the answer on their web site. Otherwise a SAE 80W90 GL-5 rated gear oil is generally specified. If I remember correctly SAE 85W140 GL-5 is what is more commonly available now a days and that"s acceptable.

 

[Richard L]

Mark from the Fort has posted that he uses Corn Head Grease in his bush hog.

 

[Jerry/MT]

I believe Mark may have a leaky seal in his mower. Most people use corn head grease when this occurs if they can replace the seal immediately and need to use the mower.

 

[Bruce(OR)]

Corn head grease by itsself does not flow as does 90W. Your "Hog" might be a lot happier with a 50/50 mix of 90W and corn head grease. Mix it in a zip lock bag, cut the corner and slide it in.