Keep it simple... keep it going... and keep it!


Search for Manuals
at Simplicity's Technical Publications Site

Enter the MFR Number:

Shirts, hats, mugs & more in the

You can make a contribution to support Simple trACtors online, safely and securely, using our PayPal account.


312 -- 12hp standard tractor with Vari-Shift Transmission

A tough Kohler engine delivers all the power you need to handle tough lawn and garden chores.  Key starting ignition only works when the tractor is in neutral and when PTO is disengaged, to assure you maximum safety

Make Kohler
Type 4 cycle, single cylinder, air cooled
Horsepower 12
Bore and Stroke 3.38" X 3.25"
Displacement 29.07 cu. in.
RPM 3600 RPM full throttle full load
Electrical System 15 amp. flywheel alternator, solid state voltage regulator-rectifier
Ignition System Battery ignition
Make Allis-Chalmers - 40 ampere hour - 12 volt
TRANSMISSION Sliding spur gear and spiral bevel gear.  21 speeds forward and 7 reverse with standard variable pitch sheave system.
DIFFERENTIAL Planetary gear with controlled traction
First 7 Speed Ranges Min. 0.8 MPH Max. 1.7 MPH
Second 7 Speed Ranges 2.0 MPH 4.0 MPH
Third 7 Speed Ranges 3.3 MPH 6.6 MPH
Reverse 7 Speed Ranges 1.7 MPH 3.4 MPH
Height (at steering wheel) 43.0"
Width Overall 38.5"
Length Overall 73.0"
Wheel Tread Front 30.7" -- Rear 28.0"
Wheel Base 48.1"
Implement Lift Electric
PTO Electric
SHIPPING WEIGHT Approx. 790 lbs

Source: AC sales catalog, Yard Power for Lawn Lovers,  1971(?), courtesy of Steve Johnson




NOTE: This site is designed to be viewed in at least 1024 x 768 resolution in Internet Explorer v6 or later, Mozilla Firefox v4 or later, and Google Chrome.  It may not display correctly in other resolutions or on other devices.  Links on this site are monetized.  We assume NO liability or responsibility for the accuracy of ANY data on this site.    
1998 - 2011 by Simple trACtors LLC, North Brookfield, MA. All rights reserved.


Please support our sponsors  . . . 
and help keep this site free for your use.