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CAL(KS) 
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Joined: 18 Sep 2009
Location: Chapman, KS
Points: 3735
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 Posted: 11 Jul 2019 at 10:42am |
sometimes the tests just dont make sense.
if you go and look at the nebreska tests for WC and UC, it actually shows the wc pulling more than the UC, even with less power and weight. Something isnt right there.
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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DougS
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Joined: 03 Nov 2011
Location: Iowa
Points: 2490
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Posted: 11 Jul 2019 at 10:34am |
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It depends, Lonn. Some tractor makers held to the idea of building a heavy machine and using pull-type implements. AC made a lighter tractor and used mounted equipment with the advent of the WD. Lighter tractors put more HP to the drawbar. If you needed a little more weight to get through a tough spot you had a Traction Booster to give you that.
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Lonn
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Joined: 16 Sep 2009
Location: Назарово,Russia
Points: 29773
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Posted: 11 Jul 2019 at 10:05am |
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Drawbar HP may depend on how Nebraska Test weighted the machine. Sometimes, if you look, the slippage is much greater from one tractor to another. Maybe the cement was hotter that day or different traction situations such as a dirt track that was sprinkled with water from time to time during the WD45 testing. So I tend to rely on PTO HP to get the most accurate rating. PTO HP can be adjusted to sea level and Nebraska Test does do that. So a WD45 gasoline tested at 43.21 PTO @ rated speed at full load with air temp @ 75˚F, and barometer reading of 28.968 but adjusted to sea level they gave it a real PTO HP rating of 45.27 HP.
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DougS
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Joined: 03 Nov 2011
Location: Iowa
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Posted: 11 Jul 2019 at 6:22am |
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Engine horsepower tells you little. Unfortunately that seems to be the way all modern tractors are rated. Drawbar horsepower in the most important - it takes into account transmission losses as well as the HP needed to move the tractor itself. PTO HP could be important if you are using PTO equipment. For tillage work, drawbar horsepower pretty much tells you how much beef the tractor has.
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Hunt4Allis
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Joined: 13 Mar 2018
Location: Ohio
Points: 1160
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Posted: 11 Jul 2019 at 6:00am |
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Ok so d17s no matter the series are all basically the same go rating?
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WF owner
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Joined: 12 May 2013
Location: Bombay NY
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Posted: 11 Jul 2019 at 5:48am |
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There are three different horsepower ratings; engine, PTO and drawbar. Make sure you are comparing apples to apples.
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Hunt4Allis
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Posted: 11 Jul 2019 at 5:37am |
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Why are some d17s listed at 52 hp, and others all the way up to 63 hp?
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WF owner
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Location: Bombay NY
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Posted: 11 Jul 2019 at 4:45am |
The first D-17's were just called a D-17, no series. The Series II, III & IV were later model tractors.
The early D-17's were an upgraded model of a WD45 with larger crankshaft journals and bearings, more power and side mounting. More had power steering.
I grew up on WD45's (and I still love to drive them), but my D-17's (early no series and Series IV) are much nicer, and safer, to use.
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Hunt4Allis
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Location: Ohio
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Posted: 11 Jul 2019 at 3:03am |
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I'm looking at a model that is supposedly a pre-series d-17 (1959)
What can anyone tell me about these early model d-17s?
Edited by Hunt4Allis - 11 Jul 2019 at 3:04am
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