Noisy Hydrostat/Hydraulics?

[Bob_Young]

Wait a minute.
Am I missing something?
My PTO speed (where the triangle is on the tach) and the recommended PTO speed for my tiller is 540rpm's.

To get to that triangle on the tach is almost wide open on the throttle.
To go the speed that I needed to travel, I needed to be in low range.... so tractor was running basically wide open.

You are not required to run 540 RPM PTO implements at 540 RPM. 540 RPM should be regarded as the 'redline' for the implement. Any PTO RPM below 540 that gets the work done (without lugging the tractor engine, of course) is OK to use. In fact, the lower RPMs are preferable as there's a greater margin of safety and less stress on implement and tractor.

I typically run my implements at 80 to 85% of rated RPM. This translates to around 450 RPM. I've never seen the need to push my own equipment any harder than that. If the tractor's running easy and the job's getting done, there's little reason to squeeze out that last 15%.

50 years ago, very few tractors had tachometers, yet PTO driven implements were rated for 540 RPM. The farmer simply advanced the throttle until the work got done adequately with the equipment running easily. That same approach works today.
Bob

 

[bill in ny]

most of my haying equipment is made to run at 540rpm. i keep it at around 530rpm . running any slower, i don't get good results.

 

[jenkinsph]

I can see where hay equipment particularly balers may need to run at pto speed but there are lots of other implements where it isn't needed. Running at full speed for the most part insures the implement manufacturers will sell replacement implements. I have no interest in haying equipment but tillers, phd's, brush cutters that I have never run at the max speed. A tyopical 2500 rpm motor I will run from 1500 to 2000.



Steve