forthemostpart
Member
I'm looking high and low to find the front to rear gear ratio for my L3400 HST. If anyone has the manual indicating this, I would appreciate if they could post it. Thanks. C.
L3400 Shop Manual
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unfinished
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I've got the workshop manual but don't see anything listed, I've looked under front axle, rear axle, hst drivetrain sections. I guess you could also infer this from the front and rear tire diameters. R4 15x19.5 and R4 27-8.50-15 are ~40 inches and ~26.5 inches. If my math is right the fronts turn approx 1.5 times for rears 1 turn or 3:2 ratio. Are you changing your tires?
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forthemostpart
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"Are you changing your tires?"
.....well I may have an extra set on rims that I may be able to use. I currently have your stated R4's on and the ones that I am considering are R1 7-16 4ply and R1 12.4-24 4ply....The ratio is close and ideally I would like to calculate the 5% margin from the gear ratio instead of the existing tires. C,
.....well I may have an extra set on rims that I may be able to use. I currently have your stated R4's on and the ones that I am considering are R1 7-16 4ply and R1 12.4-24 4ply....The ratio is close and ideally I would like to calculate the 5% margin from the gear ratio instead of the existing tires. C,
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forthemostpart
Member
OK.....thanks.....It looks like I'll have to go to the dealer for this one
Chilly807
Elite Member
The 7-16 front is the stock R1, mine are Carlisle Farm Specialists, the rears are 11.2-24 Firestone Traction Field and Road, which have been dropped from Firestone's current catalog in that size.
The last L series tractors I saw on the dealer's lot with R1s were equipped with Titans on one machine, and something different (off shore) on the other. Cheap looking tire...
The 12.4-24 may not work well, it depends on the aspect ratio of the tire. I agree, more width would be a very good thing, the 11.2-24 are narrow.
Sean
The last L series tractors I saw on the dealer's lot with R1s were equipped with Titans on one machine, and something different (off shore) on the other. Cheap looking tire...
The 12.4-24 may not work well, it depends on the aspect ratio of the tire. I agree, more width would be a very good thing, the 11.2-24 are narrow.
Sean
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forthemostpart
Member
The front to rear gear ration for the L3400HST is 1.55. When one knows this, it takes a lot of guess work out of tire sizing. My thanks to Brady Barlow for digging this up for me.
Thanks for posting it... It may help others too. :thumbsup:
So you mentioned getting another set of tires... do you know what model they are off of?
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forthemostpart
Member
1.55 vs. 1.57 - Is that enough to be a problem? I wonder since my front tire air pressure is usually much lower vs. the rear (leaky front tires) so my *actual* ratio is most likely "off". I wonder if changing air pressure you could compensate.
Next time I'm with the tractor, I'm going to mark off the tires at 90* and on the ground... and drive one rotation and see what I get. Then repeat with a bucket full of gravel. I'm always in 4x4 so I might need to keep air topped off in the front tires
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Next time I'm with the tractor, I'm going to mark off the tires at 90* and on the ground... and drive one rotation and see what I get. Then repeat with a bucket full of gravel. I'm always in 4x4 so I might need to keep air topped off in the front tires
more...