PTO Gearbox oil

[nwjones18]

Embarrassing to admit this on BITOG, but in the 5 years of my ownership I'd never checked the gear oil on my PTO tiller, granted I've only used it once, but was about to again and decided to check. It had about 4oz in it vs a 1qt capacity and I filled it with a qt of Supertech 80w-90 I had handy (Spec's 80w-90 gear oil).

Now I'm thinking I really should change the oil in my bush hog as well and I have an orphan qt of 85w-140 on the shelf. Any reason not to use that in a PTO gearbox? My gut says the heavier oil will be just fine, but figured I'd ask the experts. Bush Hog (Technically a Landpride RCR1872 Mower) spec's a 80w-90.

 

[fantastic]

Get it done before winter?

 

[thastinger]

Embarrassing to admit this on BITOG, but in the 5 years of my ownership I'd never checked the gear oil on my PTO tiller, granted I've only used it once, but was about to again and decided to check. It had about 4oz in it vs a 1qt capacity and I filled it with a qt of Supertech 80w-90 I had handy (Spec's 80w-90 gear oil).

Now I'm thinking I really should change the oil in my bush hog as well and I have an orphan qt of 85w-140 on the shelf. Any reason not to use that in a PTO gearbox? My gut says the heavier oil will be just fine, but figured I'd ask the experts. Bush Hog (Technically a Landpride RCR1872 Mower) spec's a 80w-90.

Mine takes 00 grease, not gear oil.

 

[hemitom]

I would think the gear box on a bush hog could run hot especially in heavy use ?
obviously mostly used in hot weather so can't imagine the 85w140 being a problem.

 

[Rand]

Probably a good choice if you push the brush hog /high load.
I have contemplated it for the deere m261 deck that is used for field mowing.
its almost always pushed as much as the 25hp diesel can without smoking etc.