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[Thread Backward] PTO/hydraulic setupMsg # 5371 of 8004 on Powerstroke Diesel Conference (1)To: All, From: Charlie Time: Saturday 01-31-98, 03:53 am I calculated wrong. 1HP = 33,000 ft-lb/min. A typical maximum output for a hydraulic pump would be 12/gal/min, which is 2 cu ft/min, which is ~3500 cu in/min. At 2000 psi. Power = volume X pressure. So HP = 7,000,000 in-lb/min = 600,000ft-lb/min = 18 HP. Way too much for 2 V-belts. My PTO on the other hand is rated at 40HP at that rpm. No problem. My M37 doesn't have a hand throttle (yet). The last time I was winching out of mud at idle the motor stalled. I think that sort of power transmited through either a V-belt or a power steering pump would be unhealthy. I think the Milemarker system is basically flawed due to the inherent limitations of a power steering pump. It might give hydraulic winches a bad name needlessly. I don't think there's anything terribly wrong with the winches themselves, but if someone is going to go PTO/hydraulic pump anyway, you might as well shop around and obtain a winch that is properly matched to the characteristics of the pump. You might end up with more cable capacity, a stronger winch, etc. My big front winch did cost about 40% more than a Warn 12,000 but it's literally twice the winch. What really costs a lot with hydraulics is the PTO and all the accoutrements - pump, hoses, fittings, valves. Installing a second rear winch helps "amortize" the installation. Charlie Replies to this message:
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