Re: Sick of \"what oil do i use \" debates
Apparently you didn't get an owner's manual with that mower David. Engine oil is no good in a gear box. Drain that out in favor of a proper gear oil of a viscosity suitable for your climate. Understanding that finish mowers get their majority use in warm weather anyway, a thick one like 85W140 will probably work just fine. Again assuming no owner's manual, I'd also recommend a PTO speed of 540 rpm to start. I doubt the mower has a 1000 rpm transmission.
I see you do have a tractor manual though, and you can ignore lubrication recommendations. The manuals are translated directly from the Chinese, so those recommendations are geared more toward their own domestic use. Since we have much greater access to multi-viscosity lubricants, you should go with those that are recommended for your climate. I live in Western Kentucky, where the winters are relatively mild. I use 85W140 in the front diff, AW32 in the hydraulics and steering, 15W40 in the engine, and 75W90 in the transmission. If you live in a warm climate, and/or don't plan on using the tractor during winter, these ought to work for you just fine.
//greg//