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Specifications:
AC Model B-12 Tractor
| Engine |
Briggs & Stratton, Model 300421 |
|
Speeds –Standard Drive |
|
| Type |
4 cycle air cooled |
|
First gear |
2 MPH |
| Horsepower |
12 |
|
Second gear |
3-3/4 MPH |
| Bore and Stroke |
3-1/16” X 3-7/16” |
|
Third gear |
6 MPH |
| Displacement |
30.16 cubic inches |
|
Speeds – Optional Hi – Lo Drive |
|
| RPM |
3600 max, full load |
|
First gear |
Hi 1.5 MPH
Lo .8 MPH |
| Air cleaner |
Oil foam |
|
Second gear |
Hi 3.5 MPH
Lo 1.3 MPH |
| Starter |
Electric & manual |
|
Third gear |
Hi 6.0 MPH
Lo 2.2 MPH |
| Governor |
Mechanical (flyweight) |
|
Reverse |
Hi 3.0 MPH
Lo 1.1 MPH |
| Electrical system |
12 volt, combination starter-generator |
|
Dimensions |
|
| Ignition |
Magneto |
|
Height (at steering wheel) |
37-1/4” |
| Transmission |
Sliding spur gear and spiral bevel gear. Three speeds forward and one reverse with standard drive. |
|
Height (at hood line) |
33-3/8” |
| |
Six speeds forward and two reverse with optional Hi-Lo range pulley. |
|
Width |
34-1/4” |
| Differential |
Planetary gear with controlled traction. |
|
Length |
68” |
| |
|
|
Wheel tread |
26” |
| Tire Pressures |
|
|
Wheel base |
44” |
| Rear (Standard Tractor) |
8 PSI |
|
Clearance (differential) |
6” |
| Front (Standard Tractor) |
12 PSI |
|
Clearance (drawbar) |
7” |
| Rear (With Loader) |
20 PSI |
|
Clearance (center housing) |
15-1/4” |
| Front (With Loader) |
14 PSI |
|
Clearance (front axle) |
9” |
| Rear (With Forklift) |
20 PSI |
|
Capacities |
|
| Front (With Forklift) |
20 PSI |
|
Engine case |
4 pints |
| |
|
|
Fuel tank |
6 quarts |
| Battery |
Allis Chalmers 40 ampere hour, 12 volt |
|
Transmission |
1-1/2 quarts, SAE 90 oil |
| Shipping Weight |
Approximately 680 pounds |
|
Bevel gear housing |
1 pint, SAE 90 oil |
Source:
AC Service Manual, B SERIES TRACTORS, Part No 9003453, February 1976
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