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All-Terrain Lawn Tractor Forum :: Technical Forum :: Drivetrain & Brake Tech :: Pulley, clutches, and Belts
 

 need pulley advice

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yeethaw
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PostSubject: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:25 pm
so i have a stock craftsman im looking to make go about 20-25mph it has a spicer 4360-122 transaxle in it and 20" tires which i later plan on upgrading to 21s it has a 19.5 hp briggs oppyon it thats gonna remain governed so what would be the best pulley sizes to use? i want to still have a decent amount of torque but without having to spend a buttload on pulleys currently it has a 3.5" front and a 9" rear
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MightyRaze
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PostSubject: Re: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:38 pm
I got in the 20's with a 6 engine and 5.5 rear. That is an MST trans, but shouldn't be too different. Be sure there is no play in your steering as you may loose control and roll.


need pulley advice Sig115PROJECTS:
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need pulley advice Sig214need pulley advice Sig314
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yeethaw
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PostSubject: Re: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:40 pm
well i got gen 1 craftsman steering so im prolly gonna die that thing has a quarter of a turn play in it
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MightyRaze
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need pulley advice Empty
PostSubject: Re: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:44 pm
ick.


need pulley advice Sig115PROJECTS:
     Marshal ........93 Craftsman GT6000      
     Red Bandit ...72 Wheel Horse Raider 12
     Dirty Rat........77 Sears Suburban
     Bowser..........01 Murray Widebody LT
     Other projects
Have a question? Ask me! Type in "@MightyRaze" in your post!
need pulley advice Sig214need pulley advice Sig314
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CraftsmanQuad19
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PostSubject: Re: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:48 pm
Yeah that’s a pretty poor steering design. Generally people run 1:1 pulley ratios or there about with 4 or 5 inch pulleys front and rear. Go with the larger pulleys and you won’t have to worry about belt slip
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yeethaw
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PostSubject: Re: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:52 pm
what size bores do the transaxle and engine have on the shafts
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AllisKidD21
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PostSubject: Re: need pulley advice    need pulley advice Icon_minitimeSeptember 17th 2019, 10:54 pm
Engine crank - 1" and trans pinion - 5/8" is pretty standard.


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PostSubject: Re: need pulley advice    need pulley advice Icon_minitime
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