Allis Chalmers Model D-21 series II Tractor All Service Repair Manual
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🏷️ Basic Information Identification Make: Allis-Chalmers Model: D-21 Series II Vehicle Type: Tractor Codes Manual Product Name: Allis Chalmers Model D-21 series II Tractor All Service Repair Manual Download 👋...
Approx. 75 HP (drawbar) - varies by specific engine and tuning.
Torque:
Specific torque figures not readily available without model variant details, but expected to be substantial for heavy-duty work.
Fuel System
Injection System:
Diesel Injection (likely Bosch or Simms, depending on exact configuration).
Fuel Type:
Diesel Fuel
🔧 Transmission
Standard
Transmission Type:
Manual (likely a constant mesh gearbox with multiple forward and reverse gears).
Features
Gear Selection:
Typically features a range splitter or gear splitting mechanism for optimal power delivery in various field conditions.
📐 Dimensions
Weights
Operating Weight:
Approximately 9,000 - 10,000 lbs (4,082 - 4,536 kg) - varies with options.
Wheelbase:
Approx. 92 inches (2337 mm) - requires specific measurement.
🛡️ Safety Features
Active Features
Braking System Type:
Typically internal expanding shoe brakes on the rear axle, often hydraulically actuated with a mechanical parking brake.
Passive Features
Operator Station:
Open station design; roll-over protection systems (ROPS) may be an aftermarket or later addition, not standard from original manufacture for all units.
💡 Technology Features
Infotainment
Features:
N/A (Tractor technology of the era focused on functionality, not infotainment).
Driver Assistance
Features:
N/A (Tractor technology of the era focused on mechanical systems).
Connectivity
Features:
N/A (Tractor technology of the era focused on mechanical systems).
🔧 Maintenance
Service Intervals
Engine Oil Change:
Typically every 100-250 operating hours, depending on operating conditions and oil type.
Transmission Oil Change:
Refer to manual for specific interval, often around 500-1000 hours for heavy-duty transmissions.
Fluid Specifications
Engine Oil Type:
API CD or MIL-L-2104B or equivalent (e.g., SAE 30 or 10W-30 depending on climate).
Transmission Hydraulic Fluid:
Allis-Chalmers HD-50 or equivalent (e.g., UTF - Universal Tractor Transmission Fluid, or specified hydraulic oil).
Coolant:
Ethylene glycol-based antifreeze mixed with distilled water (50/50 ratio).
Known Issues
Engine Performance:
Potential for injector pump issues, carbon buildup in combustion chambers, and wear on piston rings/cylinder liners due to age and use.
Transmission Shifting:
Wear in gear selectors or synchros can lead to difficult shifting; clutch wear is common.
Hydraulic System:
Leaks from seals and hoses, and potential wear in the hydraulic pump or cylinders are common in older units.
Electrical System Reliability:
Deterioration of wiring insulation, corrosion on electrical connections, and starter/generator issues are frequent.
📚 Vehicle History
Brand Heritage
Manufacturer:
Allis-Chalmers
Model Evolution
Series Designation:
The D-21 was a high-horsepower tractor for its era, designed for heavier work. The 'Series II' indicates an updated or refined version.
Production
Production Period:
The D-21 was produced from 1957 to 1962. The Series II likely falls within this period, likely later production years.
🏆 Awards & Recognition
Recognitions
Industry Standing:
Allis-Chalmers tractors were known for their robust build and innovation in the agricultural industry during their production years.
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