Market Position:
The Allis-Chalmers D-19 Diesel was a versatile utility tractor aimed at the mid-range agricultural market, known for its robust construction and reliable diesel power. This manual serves as the definitive resource for maintaining and repairing this classic piece of farm machinery.
Competitive Analysis:
Competed against models from manufacturers like John Deere, International Harvester, and Ford during its production era. The D-19 was appreciated for its diesel engine option which offered better fuel economy and torque compared to gasoline counterparts.
Key Features:
The D-19 Diesel is characterized by its strong drawbar pull, efficient diesel engine, and straightforward design, making it a popular choice for a variety of farm tasks. Its mechanical systems are relatively robust, but require diligent maintenance for optimal performance.
Manual Type:
Workshop Service Manual (WSM)
Coverage Areas:
Comprehensive service, repair, overhaul, maintenance, troubleshooting, and diagnostics for the Allis-Chalmers D-19 Diesel Tractor.
Systems Covered:
Engine (diesel), Fuel System, Cooling System, Lubrication System, Electrical System (starting, charging, lighting), Clutch, Transmission (gearbox, PTO), Rear Axle, Hydraulics (lift, power steering), Brakes, Steering, Front Axle, Chassis, Sheet Metal, Operator's Platform.
Procedures Included:
Routine maintenance, tune-ups, engine overhaul (including piston, ring, bearing, valve, and camshaft replacement), fuel injection system service, cooling system maintenance, electrical component testing and replacement, transmission disassembly and assembly, rear axle servicing, hydraulic system diagnostics and repair, brake system maintenance, steering system adjustments, troubleshooting charts, tightening specifications, clearances, and performance testing.
Technical Depth:
In-depth, professional-quality coverage suitable for mechanics and experienced DIY users. Includes detailed exploded diagrams, specifications, and step-by-step repair instructions for complete overhauls and complex troubleshooting.
Engine Make:
Allis-Chalmers
Engine Model:
G-148 Diesel
Engine Type:
Inline 4-cylinder, naturally aspirated diesel
Displacement:
242 cubic inches (3.97 Liters)
Bore X Stroke:
3.75 in x 4.50 in (95.25 mm x 114.3 mm)
Compression Ratio:
Approx. 18.0:1
Rated Horsepower:
Approx. 55 PTO HP (figures may vary based on testing conditions and regulations)
Rated Torque:
N/A (Specific torque figures not readily available in general documentation, detailed in WSM)
Injection System:
Roosa Master rotary injection pump (or similar Bosch/American Bosch variants)
Fuel Filters:
Primary and secondary fuel filters, often spin-on type. Manual specifies replacement intervals and filter part numbers.
Cooling Type:
Liquid-cooled
Coolant Capacity:
Approx. 12 quarts (11.4 Liters). Manual specifies correct coolant type and mix ratio.
Oil Capacity:
Approx. 6 quarts (5.7 Liters). Manual specifies correct oil viscosity and API service classification (e.g., API CD or equivalent for diesel engines).
Oil Filter:
Spin-on oil filter. Manual provides specific part numbers for genuine or equivalent filters.
Transmission Type:
Constant mesh spur-gear transmission
Gear Selection:
Typically 6 forward gears and 2 reverse gears (a common configuration for the D-19).
Optional Features:
Power Director (a torque amplifier or clutch-brake system for on-the-go shifting between two ranges within each gear, effectively providing 12 forward and 4 reverse speeds).
Transmission Fluid Type:
Manual specifies API GL-4 or GL-5 gear oil. Capacity typically around 18-20 quarts. Correct fluid type is critical for longevity.
Pto Type:
Live Power Take-Off (PTO) or Independent PTO (IPTO). The manual details operation and maintenance of the PTO engagement and drive system.
Wheelbase:
Approx. 84 inches (2134 mm)
Overall Length:
Approx. 130 inches (3302 mm)
Overall Width:
Approx. 70 inches (1778 mm) at rear wheel tread.
Operating Weight:
Approx. 5,500 - 6,000 lbs (2495 - 2722 kg), depending on configuration and ballast.
Front Tire Size:
Typically 7.50-16 agricultural tires.
Rear Tire Size:
Typically 14.9-30 or 16.9-30 agricultural tires.
Safety Ratings:
N/A (Tractor safety ratings were not standardized in the same way as modern vehicles. Emphasis is on operational safety as described in the manual.)
Active Features:
Brake system (mechanical), Parking brake.
Passive Features:
Operator's station with foot throttle, clutch, brake pedals, steering wheel. Operator presence during operation is key to safe use.
Infotainment Systems:
N/A (This is a vintage tractor; no modern infotainment systems.)
Driver Assistance Features:
N/A (This is a vintage tractor; no electronic driver assistance.)
Connectivity Options:
N/A (This is a vintage tractor; no electronic connectivity.)
Engine Oil Change Interval:
Typically every 100-250 operating hours, or annually. Manual will specify exact intervals based on operating conditions.
Fuel Filter Replacement:
Recommended at intervals specified in the manual, often coinciding with oil changes or every 250-500 hours.
Air Filter Service:
Service or replacement based on operating conditions (e.g., dusty environments require more frequent checks). Dry type or oil bath air cleaners are common; manual details service for both.
Coolant Flush Interval:
Every 1-2 years, or as recommended by coolant manufacturer and detailed in the WSM.
Engine Oil Specification:
Refer to manual for specific API classification (e.g., API CD or equivalent) and SAE viscosity grade (e.g., SAE 30 or 15W-40 depending on ambient temperature). May also specify oil meeting certain military or manufacturer standards.
Hydraulic Fluid Specification:
Refer to manual. Often specified as John Deere Hy-Gard, Case IH TCH-1, or equivalent Universal Tractor Transmission Oil (UTTO) or Type 303 fluid. Capacity is substantial.
Transmission Fluid Specification:
API GL-4 or GL-5 gear oil. Manual will specify viscosity grade (e.g., 80W-90 or 90).
Known Issues:
Common issues can include wear in the transmission synchronizers (if equipped), hydraulic pump wear leading to slow lift or steering, injector pump timing issues, electrical system gremlins (corrosion, worn wiring), and general engine wear on high-hour units. The manual provides specific diagnostic procedures for these.
Overhaul Considerations:
Engine overhaul may involve cylinder liner replacement, piston and ring replacement, bearing replacement, valve guide and seat work, and crankshaft regrinding. Transmission overhaul involves gear inspection, bearing replacement, and clutch pack (if applicable) servicing. The manual covers these in detail.
Brand Heritage:
Allis-Chalmers was a prominent American manufacturer of farm equipment, industrial machinery, and defense products. Known for its orange tractors and innovative designs.
Model Evolution:
The D-19 was part of Allis-Chalmers' D-series tractors, which evolved through various iterations to meet changing agricultural needs. It represented a step up in power and features from earlier models like the D-17.
Production Years:
Production of the D-19 typically spanned from the late 1950s to the early 1960s (e.g., 1959-1963). Exact years may vary slightly by source.
Manufacturing Location:
Manufactured by Allis-Chalmers in the United States.
