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Specifications:  AC Model B-112 Tractor

Engine

Briggs & Stratton, Model 300421

 

Speeds – Standard Drive

 

Type

4 cycle air cooled

 

First gear (7 speed ranges)

Min 0.8 MPH; Max  1.7 MPH

Horsepower

12

 

Second gear (7 speed ranges)

Min 2.0 MPH; Max 4.0 MPH

Bore and Stroke

3-1/4” X 3-7/16”

 

Third gear (7 speed ranges)

Min 3.3 MPH; Max 6.6 MPH

Displacement

30.16 cubic inches

 

Reverse (7 speed ranges)

Min 1.7 MPH; Max 3.4 MPH
RPM

3600 max, full load

Dimensions

Air cleaner

Oil foam

 

Height (at steering wheel) 37-3/4"

Starter

Electric & manual Height (at hood line) 33-1/4”

Governor

Mechanical (flyweight)

 

Width 36"

Electrical system

12 volt, combination starter-generator

 

Length 72"

Ignition

Magneto

 

Wheel tread

27-1/2" rear, 30-1/4" front

Wheel base

48”

Transmission

Sliding spur gear and spiral bevel gear.  21 speeds forward and 7 reverse with standard variable pitch sheave system.

 

Clearance (differential)

6”

Differential

Planetary gear with controlled traction.

 

Clearance (center housing)

15-1/4”

 

    

 

Clearance (drawbar)

7”

Tire Pressures

 

 

Clearance (front axle)

9”

Rear (Standard Tractor)

8 PSI

  Capacities  

Front (Standard Tractor)

10 PSI

 

Engine case

4 pints

Rear (With Loader)

12 PSI

 

Fuel tank

6 quarts

Front (With Loader)

25 PSI

 

Transmission

1-1/2 quarts, SAE 80EP oil

Battery

Allis Chalmers 40 ampere hour, 12 volt

 

Bevel gear housing 1 pint, SAE 80EP oil
Shipping Weight Approximately 745 pounds

 

 

[Source:  AC Service Manual, B SERIES TRACTORS, Part No 9003453, February 1976]

 

 

 

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