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.

 

[crashz]

If your seals are good, yeah that gear oil will do fine. If not, I run grease. Every year I dump a tube of grease in the gear box. Keep in mind, my brush cutter has seen a lot of abuse and looks as thought it spent its life testing grenades. but it works.

 

[Creekside]

It will work fine. I use whatever I have in a pump bucket for our older stuff and it will vary from 75w90 to 75w140. If it's leaking and not worth repairing you can use a 00 grease as another posted. Cornhead grease is my pick because my Deere dealer is 20 minutes away and carries it.

 

[nwjones18]

I changed it last weekend and unlike my tiller the bushhog was full and the old oil looked good. The vent on this gearbox is actually a dipstick so easy to keep track of going forward

 

[Lubener]

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.

I use 85w-140 in my Ford brush hog's gear box. I once tried 00 grease but the gear box seemed to be hotter after a mowing job.

 

[Jmoney7269]

I have a bush hog rt84gr. I did the first fluid change and put 85w-140 in it that had a sae j2360 spec plus a mil spec. After reading the currie enterprises study on mineral versus synthetic gear oil, I went with the traditional mineral gear oil in the pto gearbox the side drive gearbox.