Target Audience:
Farm owners, mechanics, collectors, and enthusiasts of vintage Allis-Chalmers tractors.
Value Proposition:
Enables cost savings on repairs and maintenance by empowering users to perform work themselves.
Analogy:
Equivalent to having a factory-trained technician in your garage.
Visual Aids:
Includes pictures and wiring diagrams for clarity in repair procedures.
Usability:
Easy-to-follow, step-by-step instructions designed to make complex repairs manageable.
Knowledge Enhancement:
Increases user knowledge and competence, reducing reliance on external mechanics for basic tasks.
Primary Coverage:
All service and repair jobs, including routine maintenance.
Document Type:
Professional quality, in-depth service repair manual.
Estimated Page Count:
Estimated 400-600 pages (typical for this era's comprehensive manuals)
Type:
Service Manual / Repair Manual
Delivery Method:
Instant Download
Software Requirement:
Adobe PDF Reader
Compatibility:
All Versions of Windows & Mac
Engine:
Engine overhaul, tuning, cooling system, lubrication system, fuel system (carburetor, governor).
Transmission:
Gearbox, clutch, final drive, power take-off (PTO) operation and repair.
Electrical:
Ignition system, starting system, charging system (generator/alternator), lighting, wiring diagrams.
Chassis And Suspension:
Steering system, front axle, rear axle, brakes (mechanical), drawbar, hitch.
Bodywork And Controls:
Operator controls, sheet metal, fenders, mounting procedures for accessories.
Routine Maintenance:
Oil changes, filter replacements, lubrication points, filter change intervals, battery maintenance.
Troubleshooting:
Diagnostic charts for common problems, symptom-based troubleshooting guides.
Repair And Rebuild:
Step-by-step instructions for component disassembly, cleaning, inspection, repair, and reassembly.
Technical Adjustments:
Valve adjustments, ignition timing, carburetor settings, brake adjustments.
Depth:
Comprehensive, covering everything from basic adjustments to complete engine and transmission rebuilds.
Diagnostics:
Detailed diagnostic procedures, including identifying causes of poor performance or component failure.
Specifications:
Includes essential torque values, clearances, fluid capacities, and performance specifications.
File Quality:
High resolution, suitable for detailed viewing and printing.
Printability:
Full printable pages, allowing users to print specific sections or the entire manual.
Digital Binding:
N/A (Digital download, printable pages).
Digital Paper Type:
N/A (Digital download).
Engine Model:
Allis-Chalmers Model B Engine (typically a 4-cylinder, L-head gasoline engine)
Engine Configuration:
Inline 4-cylinder, L-head (side valve)
Displacement:
Approximately 167.2 cubic inches (2.74 liters)
Bore X Stroke:
Approx. 3.25 inches x 4.25 inches (82.55 mm x 107.95 mm)
Horsepower Rating:
Rated at approximately 28.5 HP (drawbar) / 35 HP (belt pulley)
Torque Curve:
Torque delivery optimized for pulling power at lower RPMs.
Carburetor:
Stromberg (or Marvel-Schebler equivalent), with specific adjustment procedures detailed.
Governor:
Mechanical centrifugal governor for speed regulation, repair and adjustment covered.
Cooling Type:
Water-cooled, pressurized system with thermostat and fan.
Oil Type:
Specific oil viscosity recommended (e.g., SAE 10W-30 or SAE 30 depending on temperature), as per manual.
Oil Capacity:
Approx. 5 quarts (4.7 liters).
Type:
Manual transmission with constant mesh gears.
Number Of Gears:
4 forward speeds and 1 reverse speed.
Gear Ratios:
Specific gear ratios for each speed are detailed in the manual for diagnostic purposes.
Power Take Off:
Standard PTO (540 RPM) and optional belt pulley drive.
Clutch Type:
Single dry plate clutch.
Differential Lock:
Optional differential lock for improved traction.
Transmission Fluid Type:
Gear oil, specific viscosity and API service classification provided in manual (e.g., GL-4).
Wheelbase:
Approximately 72 inches (1829 mm)
Length:
Approximately 115 inches (2921 mm) (without PTO shaft)
Width:
Approximately 64 inches (1626 mm) (at rear wheels, adjustable)
Height:
Approximately 55 inches (1397 mm) (to steering wheel)
Operating Weight:
Approximately 2,500 lbs (1134 kg)
Front Tire Size:
Typically 4.00-12 or 5.50-16
Rear Tire Size:
Typically 9-24, 10-24, or 11-24
Wheel Bolt Pattern:
Standard agricultural wheel bolt patterns, details for hub and rim fitment available in manual.
Safety Features:
Basic safety features of the era; emphasis on operator awareness and proper use.
Braking System:
Mechanical drum brakes on the rear axle, band brake for parking.
Operator Station:
Open operator station, seat, steering wheel, foot pedals, hand controls.
Engine Oil Change:
Every 50 operating hours or annually, whichever comes first.
Air Cleaner Service:
Frequent service recommended based on operating conditions (e.g., daily or weekly).
Greasing Points:
Daily or weekly lubrication of all specified grease fittings.
Coolant Type:
Water with appropriate anti-freeze protection (e.g., permanent type) for the ambient temperature.
Hydraulic Fluid Type:
If equipped with hydraulic lift, specific hydraulic oil specifications provided in manual.
Carburetor Wear:
Wear in the throttle shaft and jets can lead to poor idling and fuel mixture issues.
Cooling System Leaks:
Radiator leaks, hose deterioration, and water pump seal wear are common maintenance items.
Ignition System Maintenance:
Spark plug wear, distributor cap/rotor corrosion, and ignition timing drift require regular attention.
Brake Adjustment:
Mechanical brakes require periodic adjustment to maintain braking performance.
Brand Origin:
Allis-Chalmers, an American manufacturer known for agricultural and industrial machinery.
Production Period:
1937-1957 (over 20 years of production).
Significance:
One of the most popular and enduring small tractors of its era, known for its affordability and versatility.
Production Volume:
Hundreds of thousands produced, making it a common sight on farms worldwide.
