Specifications, Service and Repair of Farm and Lawn Tractors

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AC Farm Tractors / AC Garden Tractors / B1 / B10 / Big Ten / B110 / B12

Allis Chalmers B-112 Technical Specifications

Allis Chalmers B112 Engine

Engine Model ................ Briggs and Stratton 300421
Engine Type ................ 4-Cycle, single cylinder L-head, air-cooled gasoline
Number of Cylinders ................ 1
Displacement, cu.in (L) ................ 30.2 (0.494)
Engine Bore, in (mm) ................ 3.25 (83.0)
Engine Stroke, in (mm) ................ 3.44 (87.0)
Maximum Horse Power, hp (kW) ................ 12.0 (8.9)
Rated Engine Speed, rpm ................ 3600
Fuel System ................ Carburetor
Governor ................ Mechanical (Flyweight)
Air Cleaner ................ Oiled foam
Ignition System ................ Battery
Spark Plug Type ................ Champion RCJ-8 or Autolite 245
Spark Plug Gap, in (mm) ................ 0.030 (0.76)
Valve Clearance (Intake), in (mm) ................ 0.007-0.009 (0.18-0.23)
Valve Clearance (Exhaust), in (mm) ................ 0.017-0.019 (0.43-0.48)
Fuel Tank Capacity, gal (L) ................ 1.5 (5.7)
Oil Capacity, qt (L) ................ 2.0 (1.9)

Electrical System

Electrical System Rating, Volts ................ 12
Electrical Ground ................ Negative
Charging System ................ Generator
Starter Type ................ Electric
Battery Voltage, Volts ................ 12
Battery Rating, Ah ................ 45

AC B112 Power Take-Off

Front PTO Operational Type ................ Live
Rear PTO Operational Type ................ Live
Mid PTO Operational Type ................ Live

Transmission Configuration

Transmission Model ................ Vari-Shift
Transmission Type ................ Belt-driven variator
Gearbox Type ................ 21F/7R, Four gears with 7-position variator
Number of Forward Gears ................ 21
Number of Reverse Gears ................ 7
Oil Capacity, qt (L) ................ 1.5 (1.4)
Maximum Forward Speed, mph (kph) ................ 6.3 (10.1)
Maximum Reverse Speed, mph (kph) ................ 3.4 (5.5)

AC B112 Wheels and Tires

Drive Wheels ................ 2WD 4x2
Steering Configuration ................ Front steer
Steering System ................ Manual
Brakes Type ................ Integral mechanical
Front Tire Size ................ 16x6.50-8
Rear Tire Size ................ 23-8.50x12
Front Tread Width, in (mm) ................ 30.0 (755)
Rear Tread Width, in (mm) ................ 32.0 (805)

Dimensions and Weight

Wheelbase, in (mm) ................ 48 (1210)
Length, in (mm) ................ 74.1 (1880)
Height (Steering Wheel), in (mm) ................ 40 (1010)
Height (Hood), in (mm) ................ 33.8 (855)
Overall Width, in (mm) ................ 36.5 (920)
Ground Clearance (Front Axle), in (mm) ................ 9 (225)
Ground Clearance (Rear Axle), in (mm) ................ 6 (150)
Weight, lb (kg) ................ 740 (335)

Allis Chalmers B112 Attachments

Front End Loader

Loader Model ................ Allis Chalmers L12
Bucket Width, in (mm) ................ 43 (1085)
Bucket Capacity (Struck), cu.ft (m3) ................ 3.5 (0.10)
Bucket Capacity (Heaped), cu.ft (m3) ................ 4.0 (0.11)
Bucket Weight, lbs (kg) ................ 93 (42)
Lifting Capacity Full Height, lbs (kg) ................ 300 (136)
Breakout Force, lbs (kg) ................ 500 (227)
Height to Bucket Hinge Pin ................ 63.5 (1600)
Maximum Clearance at Full Height, in (mm) ................ 49.5 (1250)
Reach at Maximum Height, in (mm) ................ 20 (505)
Reach at Ground Level, in (mm) ................ 35 (780)
Dump Angle, deg ................ 45
Digging Depth, in (mm) ................ 1.5 (35)
Loader Weight, lbs (kg) ................ 260 (118)

42-in Mower Deck

Mower Deck Type ................ Mid-mount
Number of Blades ................ 3
Cutting Width, in (mm) ................ 32 (1060)
Cutting Height, in (mm) ................ 1.0-4.0 (25-101)
Lift System ................ Manual

48-in Mower Deck

Mower Deck Type ................ Mid-mount
Number of Blades ................ 3
Cutting Width, in (mm) ................ 48 (1210)
Cutting Height, in (mm) ................ 1.0-4.0 (25-101)
Lift System ................ Manual

36-in Snow Blower

Snowblower Type ................ Single-stage, front-mount
Clearing Width, in (mm) ................ 36 (910)
Drive Type ................ Belt
Lift System ................ Manual

42-in Snow Blower

Snowblower Type ................ Single-stage, front-mount
Clearing Width, in (mm) ................ 42 (1060)
Drive Type ................ Belt
Lift System ................ Manual

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ALLIS CHALMERS TRACTORS SPECIFICATIONS

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INTERNATIONAL HARVESTER TRACTORS SPECS

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