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Steve C.

PTO horsepower ratings

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1066 early 1277 rpm PTO 2635 engine, no load, 1159 rpm full load, 2400 rpm engine116.2 hp

1066 late 1255 rpm PTO, 2849 engine no load.  1146 rpm full load PTO, 2601 rpm engine full load 125.6 hp.

Test numbers 1081 and 1124 nebraska test numbers.

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that's why M & W  DYNOS  came with the little rotary disks to convert to corrected hp

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early 1066 was 2600 rpm high idle=1256 pto rpm  2400 rated rpm (full load) 1159 PTO RPM  113.5 HP.   late 1066 was 2830 rpm high idle=1247 pto rpm  2600 rated (full load) rpm 1146 pto rpm 125.6 hp

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On 11/25/2018 at 6:00 PM, Steve C. said:

If IH claimed the 1066 ran 125 at 2600, I can't figure out where rated pto speed of 2300 fits in.

PTO speed is where the real work is done.

IH went with high idle numbers to make Deere look stupid. They knew high idle was past the peak of the torque/HP curve, and the engines made more at the lower RPM. "Look at what our 125HP tractor does to Deere's alleged 125HP tractor!" The 4430 Deere was putting out an honest 125HP, while the "125HP" 1066 was pushing 140HP at PTO speed.

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3 hours ago, Matt Kirsch said:

PTO speed is where the real work is done.

IH went with high idle numbers to make Deere look stupid. They knew high idle was past the peak of the torque/HP curve, and the engines made more at the lower RPM. "Look at what our 125HP tractor does to Deere's alleged 125HP tractor!" The 4430 Deere was putting out an honest 125HP, while the "125HP" 1066 was pushing 140HP at PTO speed.

IIRC, the Deere's 404 was rated at 2200 and pto was 2100.

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1 hour ago, Steve C. said:

IIRC, the Deere's 404 was rated at 2200 and pto was 2100.

4020s were 1,900 rpms at pto speed.  I think all of the Waterloo NG tractors were like that.  I can tell you one thing, we didn't run them at 1,900 rpms in the field on the plow. 

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19 minutes ago, Big Bud guy said:

4020s were 1,900 rpms at pto speed.  I think all of the Waterloo NG tractors were like that.  I can tell you one thing, we didn't run them at 1,900 rpms in the field on the plow. 

All the talk on here of big horsepower makes a guy chuckle. In 1975 or 6 stock tractor pulls were starting to go on around here. Everyone thought they had the big power going on. Dad took his 806 turbo to county fair in town he thought he had it tuned up well. They all got their butts handed to them by a 4020 that a John Deere mechanic and his buddies fixed. It was mechanics neighbor and farming partner tractor. Being they were at John Deere shop. They they liberated a turbo setup off a tractor in shop, pulled injectors set pressures I think he even borrowed new injectors. And the last thing I asked him a few years ago what they did to make it run. He said they pulled injection pump off changed the roller settings and added all the parts from more hp tractors. He thought they even made the governor so it worked right off throttle to wide open unlimited rpm.They pulled most of the extra parts off 4020 and added weights off of shop tractors also. They took first with the lowly 404 dad had 3rd with his standard 806. I will admit in the field dads 806with turbo duals and weights would pull pretty well. But to use it for anything major no way. 

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13 hours ago, Big Bud guy said:

4020s were 1,900 rpms at pto speed.  I think all of the Waterloo NG tractors were like that.  I can tell you one thing, we didn't run them at 1,900 rpms in the field on the plow. 

I think you're thinking of 4010, it is 1900 rated pto speed. 4020 went up to 2200, both will still high idle to 2650 though. 

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38 minutes ago, Injpumped said:

I think you're thinking of 4010, it is 1900 rated pto speed. 4020 went up to 2200, both will still high idle to 2650 though. 

I am not.  Although the 4020 is long long gone I remember you pulled the throttle lever all the way down to the first stop to get 1,900 rpms, then pull the knob out and pull the throttle down to the 2nd stop get 2,200.  Also i know on our 5010 and 5020, 1,900 rpms is we’re you get your correct PTO speeds even though full throttle is 2,200 and pulling out the knob gets you 2,500.

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