Mechanical Ratio

nansman

New member

Equipment
MX4700
Nov 29, 2015
3
0
1
Cabot, AR
Does anyone know the acceptable tolerances for the drive train ratio? I calculated the numbers for the OEM recommended tires for the MX4700, and it is 1.57 with R1 agriculture tires and 1.47 for the R4 industrial tires using manufacturer's rolling circumferences.

R1 Front 9.5/16 RC98
R1 Rear 14.9/26 or 13.6/28 RC154

R4 Front 12/16.5 RC98
R4 Rear 17.5L/24 RC145
 

torch

Well-known member

Equipment
B7100HSD, B2789, B2550, B4672, 48" cultivator, homemade FEL and Cab
Jun 10, 2016
2,583
831
113
Muskoka, Ont.
According to this post by Cr555, he spoke directly with a Kubota technician who told him:

Kubota actually recommends that the front wheel "lead" fall within the range of 3 - 7 percent (as opposed to the 1-5 percent you see everywhere on the internet). And, he stated that while using the rolling circumference is acceptable, the best measurement to use in your calculations is the "static loaded radius" (it will give the most accurate result).
(static loaded radius is the distance from the center of the tire to the ground when inflated and fully loaded)