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Farmall & IHC Tractors Discussion Forum
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gear ratios and horsepower

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robertw

09-26-2005 12:42:02




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What is the difference between the gear ratios in a Farmall H and Farmall Super H? I know 2nd, 3rd and 4th are faster in the Super H, but was wondering how 1st gear compares in the two. Also, what is the horsepower in the H and Super H?




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DWV

09-26-2005 18:36:36




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 Re: gear ratios and horsepower in reply to robertw, 09-26-2005 12:42:02  
With same size tires and turning the same RPM
the speeds are exactly the same in first and fifth.Both offered a low low first gear the same ratio.Only H offered a non standard fourth gear called high speed fourth.The tooth count for 2,3 and 4 listing driving gear first. H-2 28&42, H-3
31&39, H-4 35&35, H high speed 4 41&29. SH-2 29&41,SH-3 34&36, SH-4 39&31.Regular first both
23&47, Low low both 17&53.Pinion,ring gear,constant mesh and bull gears same ratio.This is on regular row crops.

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Haas

09-26-2005 13:55:02




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 Re: gear ratios and horsepower in reply to robertw, 09-26-2005 12:42:02  
From Fay's data book
Gear H Super H 1st 2 5/8 mph 2 5/8 mph
2nd 3 mph 3 3/4 mph
3rd 4 1/4 mph 5 mph
4th 5 3/8 mph 6 5/8 mph
5th 15 5/8 mph 16 1/4 mph

Belt HP 27.9 34.61

Speeds are with 10X38 tires for the H and 11X38 tires for the Super H. Format of table does not come through to the forum. I think you can make it out though.

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CNKS

09-26-2005 17:19:17




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 Re: gear ratios and horsepower in reply to Haas, 09-26-2005 13:55:02  
Not a great deal of difference, but these are out of the H/Super H Operators manuals with the same tire size you list:
H Super H
1st 2 1/2 2 5/8
2nd 3 3/8 3 3/4
3rd 4 1/8 5
4th 5 1/8 6 5/8
5th 15 5/8 16 1/4

Drawbar HP -- (not in manuals) 25.5/31
It is very easy to misplace or miscopy numbers when writing or publishing.



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Gatz

09-27-2005 09:00:46




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 Posting TableTest in reply to CNKS, 09-26-2005 17:19:17  
just tryin something out...if it works, I'll repost new, Gatz

From Haas's post of 9-26-05

       "H"       "Super H"
1st   2 1/2       2 5/8
2nd   3 3/8       3 3/4
3rd   4 1/8       5
4th   5 1/8       6 5/8
5th  15 5/8      16 1/4    
Drawbar HP -- (not in manuals) 25.5/31
It is very easy to misplace or miscopy numbers when writing or publishing.



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CNKS

09-27-2005 18:17:30




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 Re: Posting TableTest in reply to Gatz, 09-27-2005 09:00:46  
That's nice -- I can do that too, just too lazy.



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gatz

09-27-2005 09:22:01




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 Re: Posting TableTest in reply to Gatz, 09-27-2005 09:00:46  

text

end



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gatz

09-27-2005 09:31:07




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 Re: Posting TableTest in reply to gatz, 09-27-2005 09:22:01  

table

end table



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