Tractor Segment:
Mid-size row-crop tractor, popular in its era for general farming applications, offering a good balance of power and maneuverability.
Competitors:
Competed with models from John Deere (e.g., 4010/4020 series), IH (e.g., McCormick Farmall 460/560), Massey Ferguson (e.g., 35/65 series), and Ford (e.g., 4000/5000 series).
Features:
Robust diesel engine, versatile hydraulic system (often with Category II hitch), optional live PTO, power steering availability, and a comfortable operator station for its time.
Covered Systems:
Engine overhaul, transmission, hydraulics, electrical system, steering, brakes, chassis, body, maintenance schedules, troubleshooting.
Estimated Pages:
High (typically 300-500 pages for comprehensive tractor manuals)
Type:
Workshop Service Manual / Repair Manual
Powertrain:
Complete engine disassembly, inspection, repair, and reassembly; clutch, transmission (gearbox and PTO), final drives, differential.
Hydraulics:
Hydraulic pump, control valve, lift arms, external hydraulic connections, cylinder repairs, troubleshooting hydraulic system.
Electrical:
Wiring diagrams, starter, generator/alternator, battery system, lighting, ignition system, instrument panel.
Steering And Brakes:
Steering mechanism (manual and power assist if applicable), brake system components, adjustments, and repairs.
Chassis And Body:
Frame, axles, drawbar, fenders, operator's platform, sheet metal repairs, mounting procedures for implements.
Maintenance:
Routine service, lubrication points and schedules, fluid level checks, filter replacement, tune-up procedures.
Troubleshooting:
Systematic diagnostic procedures for common problems encountered with engine, transmission, hydraulics, and electrical systems.
Repair:
Detailed step-by-step instructions for component removal, disassembly, inspection, repair, reassembly, and installation.
Adjustments:
Clutch pedal, brake pedal, governor, ignition timing, hydraulic controls, PTO engagement.
Depth:
Comprehensive: Covers basic maintenance to complete engine and transmission rebuilds, including detailed torque specifications and clearance measurements.
Engine Model:
Allis-Chalmers 2500 Series Diesel (e.g., 251-4B or similar)
Engine Type:
Inline 4-cylinder, naturally aspirated diesel
Displacement:
Approximately 250-260 cubic inches (4.1-4.3 Liters)
Bore X Stroke:
Typically around 3.875" x 4.33" (98.4 mm x 110 mm)
Horsepower Rated:
Approximately 50-60 PTO horsepower, with a drawbar HP around 40-45.
Torque Peak:
Not readily available in product description, but expected to be in the 150-180 lb-ft range at ~1400 RPM.
Fuel Injection:
Roosa Master or similar distributor-type injection pump.
Fuel Filter:
Spin-on or cartridge type, specific part number varies by replacement supplier.
Cooling Type:
Liquid-cooled (water pump driven by engine)
Oil Type:
API CD or CE rated diesel engine oil (e.g., 15W-40 or 20W-50 depending on climate and engine condition).
Oil Capacity:
Approximately 7-8 quarts (US) including filter.
Transmission Type:
Constant mesh, sliding gear transmission.
Number Of Gears:
Typically 6 forward speeds and 2 reverse speeds.
Pto:
Live PTO (Power Take-Off) was often an option, allowing the PTO to operate independently of the transmission clutch.
Clutch:
Dual-stage clutch (one for transmission, one for PTO if equipped).
Transmission Oil:
API GL-4 rated gear oil, e.g., 80W-90 or 85W-140 depending on operating temperature. Some systems may use Universal Tractor Transmission Oil (UTTO).
Transmission Oil Capacity:
Approximately 20-25 quarts (US) for the main gearbox and rear end.
Wheelbase:
Approximately 85-90 inches (2160-2286 mm)
Length:
Approximately 130-140 inches (3302-3556 mm) without implements.
Width At Rear Axle:
Adjustable, typically ranging from 60-80 inches (1524-2032 mm).
Ground Clearance:
Approximately 15-20 inches (381-508 mm) depending on tire size and axle configuration.
Shipping Weight:
Around 4,000 - 4,500 lbs (1814 - 2041 kg)
Operating Weight:
Approximately 4,500 - 5,000 lbs (2041 - 2268 kg) with fluids and operator.
Max Ballasted Weight:
Can exceed 7,000 lbs (3175 kg) with wheel weights and fluid-filled tires for traction.
Safety Features:
ROPS (Roll Over Protection System) was not standard equipment for this era but could be fitted as an aftermarket accessory. Seat belts were also not standard.
Brakes:
Mechanical drum brakes on rear wheels, often operated by linked pedals or independently for steering assistance. Parking brake mechanism.
Operator Station:
Open station design with basic controls. Fenders provide some protection. Foot platform.
Infotainment System:
N/A - This is a vintage tractor; no modern infotainment systems are present.
Driver Assistance Features:
N/A - Focus is on mechanical operation, not electronic driver aids.
Connectivity Features:
N/A - Mechanical and electrical systems only.
Engine Oil Change:
Every 100-200 operating hours or annually, whichever comes first. Check manual for specifics.
Air Filter Service:
Check daily, clean/replace as needed based on operating conditions (e.g., dusty environments require more frequent checks).
Fuel Filter Replacement:
Annually or every 200-300 operating hours.
Transmission Oil Change:
Every 1000-1500 operating hours, or every 2-3 years. Inspect for wear metals.
Hydraulic Fluid:
Universal Tractor Transmission Oil (UTTO) or equivalent hydraulic fluid meeting CAT TO-2 or John Deere J20C specifications. Check manual for specific AC recommendation.
Hydraulic Fluid Capacity:
Approximately 5-7 gallons (US) for the complete hydraulic system, including the three-point hitch and remotes.
Engine Wear:
Common wear items include piston rings, valve guides, and cylinder liners due to age and high operating hours. Head gasket failures can occur.
Hydraulic System:
Leaking seals in the hydraulic pump, control valve, and lift cylinders are common. Filtration is critical to prevent wear.
Transmission Synchros:
Wear in synchromesh rings can lead to difficult shifting or grinding, particularly in older, high-hour units.
Electrical System:
Wiring harness degradation, generator/alternator failure, and starter solenoid issues are not uncommon due to age.
Clutch Wear:
Wear on clutch plates, release bearings, and pilot bearings is expected over time and requires periodic adjustment or replacement.
Brand Legacy:
Allis-Chalmers was a prominent American manufacturer of farm machinery, known for innovation and distinctive orange paint schemes. The company has a long history dating back to the late 19th century.
Predecessors:
Evolved from earlier Allis-Chalmers models like the WD45, incorporating updated styling and improved features.
Successors:
The D-19 was part of the 'D' series, which included models like the D-17, D-14, and later the D-21. It represented a step up in power and features for its time.
Manufacturing Location:
Typically manufactured at Allis-Chalmers plants in the United States.
Production Volume:
Moderate to high volume for its segment, reflecting its popularity.
Industry Acclaim:
While specific awards for the D-19 might not be documented, Allis-Chalmers tractors of this era were generally well-regarded for their durability and performance in the agricultural market.
Owner Satisfaction:
High satisfaction among owners who maintained their equipment diligently, often passed down through generations.
Certification:
N/A - Tractors of this era were not subject to the same certification standards as modern vehicles.
