40hp drawing
Contact: Dawson Jones, Inc.  Phone 937-242-6637 or dawson@tractors-equipment.com
40hp Gear Boxes
40 hp Gear Box , Shear Bolt
40 hp Gear Box, 6 Spline
40hp Gear Boxes have the following characteristics:

  • A 1-3/8" dia. input shaft either Shear Bolt or Splined

  • 4 mounting bolts arranged in an evenly spaced square  
    pattern w/ a bolt on both sides of the input shaft. Bolt
    spacing 4-3/4" from hole to hole.

  • The output shaft is 1.57" dia. and has 12 tapered splines

  • Gear Box ratios generally available from 1:1.47 to 1:1.93

  • 4' Cutters generally use 1:1.93 or 1:1.47 gear boxes

  • 5' and 6' Light and Standard Duty cutters generally use the
    1:1.47 ratio boxes
Shear Bolt
Input Shaft
6 Spline
Input Shaft

These pages are still under construction,
but are usable for reference.
In the meantime these two gearboxes may be ordered
by clicking on the gear box image below.
For more details on the 40hp gear boxes shown see the illustration below
01-008 / 01-009
1:1.47 / 1:1.93 Ratio
(External Dimensions are the same)
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FYI, If you have any
questions about compatibility
regarding gear box fit and
please call us at
or fill out the info
above and send us an email
Including S/H
Including S/H