Re: Independent PTO speed without hydrostatic?

Posted by Dean on June 09, 2017 at 16:00:45 from (68.50.160.151):

In Reply to: Re: Independent PTO speed without hydrostatic? posted by FordPig on June 09, 2017 at 14:48:08:

I've been mowing with various tractor/mower combinations in various conditions for nearly 50 years.

I've used crash boxes, constant mesh, power shifting, S-O-S, and hydrostatic transmissions with ground driven PTO, live PTO and independent PTO.

Currently, I have a Kubota M9960 with dual range six speed synchronized transmission with hydraulic shuttle and independent PTO and a Kubota L6060 with hydrostatic transmission and independent PTO.

My parcels are irregularly shaped, bounded by trees and other obstacles, and some are steep. Some of the parcels have MANY trees within the mowed area, requiring continual back-and-forth movement.

Currently, I use the 6060 Hydrostat with a HD Woods 6' cutter to cut things in by making a couple of rounds where I'm constantly backing in beneath and between trees. The hydrostatic transmission is absolutely WONDERFUL for this use. Once cut in, I switch off to the 9960 with a HD Woods 7' cutter (not real fond of this cutter, and considering replacing it with either a mounted 8' or, perhaps, a 12' or 15' bat wing.)

The 148 CI, 53 PTO HP L6060 hydrostat is a dream to drive but hydrostat transmissions are inefficient because considerable HP is being converted to heat. It is thirsty. It uses more fuel, indeed considerably more fuel, to do the same work than does the 230 CI (?), 90 PTO HP M9960 with gear transmission. When working the 6060 hard, i.e., heavy cover, steep ground and lots of back and forth cutting in work, I can put somewhere between 3 and 4 GPH through the 148 CI engine operating at about 2,500 RPM. So far, I've not been able to put more than about 2 GPH through the 90 PTO HP M9960.

All said, I love my 6060 hydrostat, because I can do the work previously done with other equipment in considerably less time and it is easier on me. Even though my crash box, drum brake, live PTO 2007 MF 533 with 202 CI Perkins 3 cylinder NA engine, turned down to 45 PTO HP (2007 version of the 135) doing the same work and using the same mower would use about 1/3 the fuel, I would never go back because I can do the work in much less time and am less fatigued once finished.

Dean

Replies:

• Re: Independent PTO speed without hydrostatic? jm. 18:35:31 06/09/17 (1)
  • Re: Independent PTO speed without hydrostatic? Dean 10:03:46 06/10/17 (0)

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