Category:
Specialty agricultural equipment service manual.
Target Audience:
Allis-Chalmers Model G tractor owners, mechanics, restoration specialists, and vintage tractor enthusiasts.
Completeness:
Covers all aspects of service and repair for the Model G tractor, offering a comprehensive resource for maintenance and restoration.
Usability:
Well-organized with a table of contents for easy navigation and information retrieval.
Cost Savings:
Empowers owners to perform repairs and maintenance themselves, significantly reducing service costs.
Knowledge Gain:
Provides in-depth understanding of the tractor's systems and operation, crucial for emergency repairs and optimal performance.
Major Systems:
Engine, Transmission, Drivetrain, Steering, Brakes, Electrical System, Hydraulic System, Chassis, Bodywork, Operator Controls
Specific Procedures:
Routine Maintenance, Troubleshooting, Engine Overhaul, Transmission Repair, Clutch Service, Differential Service, Steering System Adjustment, Brake System Overhaul, Electrical System Diagnostics, Hydraulic Pump Service, PTO Operation and Maintenance, Implement Attachment and Operation
Estimated Pages:
Highly Comprehensive (Specific count not provided, but typical for factory service manuals covering all aspects)
Type:
Factory Service Repair Manual (Workshop Manual)
Powertrain:
Detailed coverage of the G149 engine, including fuel system, ignition (if applicable to early models, otherwise electrical timing), cooling system, lubrication, and exhaust. Comprehensive transmission and drivetrain components, including clutch, gearbox, driveshafts, rear axle, and differential.
Chassis And Control:
In-depth information on the steering system (likely sector and pinion type), braking system (type and components), front and rear suspension (if applicable), and all operator controls.
Electrical And Hydraulic:
Complete wiring diagrams, component identification, troubleshooting for electrical faults. Detailed coverage of the hydraulic system, including pump, valves, cylinders, and reservoir, for implement control.
Maintenance:
Regular service schedules, lubrication points, fluid change intervals, filter replacement procedures, and component inspection guidelines.
Repair And Rebuild:
Step-by-step instructions for disassembly, cleaning, inspection, repair, and reassembly of all major components and systems. Includes specifications for tolerances and clearances.
Troubleshooting:
Systematic diagnostic procedures to identify common faults and their causes, with recommended corrective actions. Includes symptom-based troubleshooting guides.
Depth:
Comprehensive, ranging from basic preventative maintenance to complete engine and transmission rebuilds. Suitable for experienced mechanics and tractor owners undertaking significant repairs.
Searchability:
Likely text-searchable PDF, enabling quick location of information.
Readability:
Requires Adobe PDF Reader or compatible software.
Quality:
High-quality digital reproduction of original factory documentation.
Type:
N/A (Digital Download)
Type:
N/A (Digital Download)
Requirements:
Adobe PDF Reader, WinZip (for potential archive extraction)
Engine Type:
Inline 4-Cylinder, L-Head (Overhead Valve in later configurations, but L-head is common for early G)
Displacement:
149 cubic inches (approximately 2.4 liters)
Horsepower:
Estimated 25-30 PTO horsepower (actual varies by condition and tuning)
Torque:
Not explicitly stated in product description, but crucial for engine rebuild specifications.
Carburetor:
Typically a single barrel updraft or downdraft carburetor (specific model not provided)
Type:
Battery and Coil Ignition (Distributor based)
Type:
Sliding Gear, Constant Mesh
Speeds:
4 Forward, 1 Reverse
Transmission Types:
No optional transmissions are generally noted for the Model G.
Clutch:
Dry Single Plate Clutch
Rear Axle:
Heavy-duty, enclosed spur gear final drive.
Transmission Fluid:
API GL-4, SAE 90 Gear Lubricant (Specific manufacturer recommendations would be in the manual)
Wheelbase:
Approximately 70 inches (1778 mm)
Length:
Approximately 110 inches (2794 mm)
Width:
Variable based on rear wheel spacing, approximately 60-70 inches (1524-1778 mm)
Operating Weight:
Approximately 2,000-2,300 lbs (907-1043 kg)
Drawbar Pull Capacity:
Not specified, but designed for light to medium farm work.
Front Tires:
Typically 4.00-12 or similar
Rear Tires:
Typically 9.50-20 or 10-24 (variable)
Crash Safety:
N/A (Tractors from this era were not subjected to automotive-style crash testing.)
Braking System:
Mechanical Drum Brakes (rear axle), typically operated by foot pedals and a hand lever parking brake.
Operator Station:
Open operator station with a seat and steering wheel. No rollover protection or seatbelts as standard equipment.
General:
The manual would detail critical safety precautions for operating, maintaining, and repairing the tractor, including awareness of moving parts, fluid hazards, and proper lifting techniques.
Engine Oil Change:
Typically every 40-60 operating hours or annually (specifics in manual)
Transmission Oil Change:
Annually or every 200 operating hours (specifics in manual)
Grease Points:
Daily or weekly depending on usage (refer to manual for specific points and intervals)
Engine Oil:
SAE 30 or SAE 10W-30 (depending on ambient temperature, specific recommendations in manual)
Coolant:
Water with appropriate anti-freeze mixture (e.g., ethylene glycol)
Hydraulic Fluid:
Tractor Hydraulic Fluid (THF) or equivalent specified by Allis-Chalmers (e.g., SAE 20W-20)
Common Wear Items:
Clutch wear, brake band wear, seal leaks (engine, transmission, hydraulics), carburetor issues, potential for ignition system problems (points, condenser).
Restoration Challenges:
Availability of specific parts, particularly body panels and unique components. Engine and transmission wear due to age and usage.
Manufacturer:
Allis-Chalmers Manufacturing Company
Legacy:
A prominent American manufacturer of agricultural and construction equipment, known for innovation and quality.
Design Philosophy:
Designed as a versatile, compact, and affordable tractor, particularly suited for smaller farms and vegetable growers. Known for its distinctive low-profile design and user-friendly operation.
Production Period:
1947-1955
Manufacturing Location:
La Crosse, Wisconsin, USA
