Market Segment:
Utility tractor, popular for small to medium farms, landscaping, and light industrial applications.
Competitors:
John Deere 10 Series, Farmall Cub/230, Ford 8N/2N, Massey Ferguson FE Series.
Durability:
Known for robust construction and reliability in demanding conditions.
Versatility:
Adaptable to a wide range of implements via PTO and hydraulic systems.
Simplicity:
Relatively straightforward mechanical design, facilitating maintenance and repair.
Engine:
Detailed overhaul, troubleshooting, fuel system, lubrication, cooling system, ignition system.
Transmission:
Manual and Power Steering transmission (if equipped) overhaul, troubleshooting, lubrication.
Clutch:
Service, adjustment, and overhaul of the clutch assembly.
Rear Axle:
Differential, final drive, and rear axle overhaul and troubleshooting.
Hydraulics:
Hydraulic system (lift, steering) diagnosis, repair, component service (pump, cylinders, valves).
Steering:
Mechanical and power steering system repair and adjustment.
Brakes:
Brake system overhaul, adjustment, and troubleshooting.
Electrical:
Wiring diagrams, starter, generator, lighting, ignition system components.
Front Axle:
Front axle and steering linkage repair and adjustment.
Power Take Off Pto:
PTO system service and troubleshooting.
Chassis:
Frame, mounting points, and general chassis component service.
Maintenance:
Scheduled maintenance, lubrication points, fluid level checks, filter replacements.
Troubleshooting:
Diagnostic charts and procedures for identifying and resolving common and uncommon issues.
Repair:
Step-by-step instructions for component removal, overhaul, repair, and reassembly.
Adjustment:
Precise procedures for adjusting engine, clutch, brakes, steering, and other systems.
Specifications:
Torque values, clearances, fluid capacities, and other critical technical data.
Disassembly Assembly:
Detailed guides for taking apart and putting back together all major components.
Depth:
Comprehensive, covering basic maintenance to complete engine and transmission rebuilds.
Engine Make Model:
Allis-Chalmers (various gasoline and diesel options depending on specific D-15 II configuration)
Engine Type:
4-cylinder, overhead valve, naturally aspirated.
Displacement:
Typically around 150-170 cubic inches (exact for Series II may vary based on specific engine option).
Horsepower:
Approx. 30-35 PTO HP (engine horsepower will be slightly higher).
Torque:
Specifications vary by engine variant.
Fuel Type:
Gasoline or Diesel (depending on variant).
Carburetor Diesel Injection:
Stromberg or Zenith carburetor for gasoline; Roosa Master or Bosch injection pump for diesel.
Cooling Type:
Water-cooled with thermostat and fan.
Oil Type:
API Service Classification CD or CE (for diesel), SG or SH (for gasoline) recommended. Consult manual for specific viscosity grades (e.g., SAE 30, 15W-40).
Ignition Type:
Spark ignition (gasoline), compression ignition (diesel).
Transmission Type:
6-speed constant mesh (or similar variation) manual transmission.
Transmission Options:
Certain models may have featured a shuttle shift or other transmission enhancements.
Gear Ratios:
Detailed gear ratios are provided within the service manual for each gear.
Transmission Fluid:
SAE 80W-90 GL-4 or GL-5 gear oil, or specific Allis-Chalmers brand fluids as recommended.
Wheelbase:
Approx. 78 inches (1981 mm).
Length:
Approx. 120 inches (3048 mm) without implement.
Width:
Approx. 68 inches (1727 mm) at rear wheels (adjustable).
Height:
Approx. 55 inches (1397 mm) to top of steering wheel.
Operating Weight:
Approx. 3,500 - 4,000 lbs (1588 - 1814 kg) depending on configuration and tires.
Drawbar Pull:
Varies with traction and weight.
Infotainment System:
N/A (Tractor technology of the era focused on function, not entertainment systems).
Driver Assistance Features:
N/A (Basic operator controls only).
Connectivity Options:
N/A (No electronic connectivity features).
Engine Management:
Mechanical fuel injection and ignition systems, no electronic control units (ECUs).
Engine Oil Change:
Typically every 50-100 operating hours, or annually. Consult manual for specifics.
Transmission Oil Change:
Recommended every 500-1000 operating hours. Consult manual.
Hydraulic Fluid Change:
Recommended every 500-1000 operating hours. Consult manual.
Coolant Type:
Ethylene glycol based antifreeze with corrosion inhibitors. 50/50 mix with distilled water recommended.
Hydraulic Fluid Type:
Allis-Chalmers Hy-Tran or equivalent. Refer to manual for exact specification (e.g., CAT TO-2 spec fluid may be acceptable).
Grease Type:
Lithium-based multi-purpose grease recommended for all grease points.
Engine Overheating:
Can be caused by radiator blockage, worn water pump, or faulty thermostat. Manual addresses diagnosis.
Hydraulic System Leaks:
Common wear points include cylinder seals, pump seals, and hose connections. Manual provides repair procedures.
Clutch Slippage:
Indicates worn clutch disc or pressure plate. Manual details clutch replacement.
Transmission Grinding:
Often points to worn synchronizers or shifting forks. Manual covers transmission overhaul.
Heritage:
Allis-Chalmers was a major American manufacturer of agricultural machinery and heavy equipment with a long history of innovation.
D Series:
The D-15 was part of Allis-Chalmers' popular D-series line, succeeding models like the D-14 and preceding later designs.
Production Years:
The D-15 Series II was produced from approximately 1962 to 1966.
Manufacturing Location:
Milwaukee, Wisconsin, USA.
Industry Recognition:
Allis-Chalmers tractors of this era were recognized for their durability and efficiency in their respective market segments.
Performance Ratings:
Rated based on drawbar pull, PTO horsepower, and hydraulic lift capacity relative to contemporary competitors.
Safety Certifications:
Factory ROPS and seatbelts were optional and met safety standards of the time; aftermarket installations often required specific certifications.
