Model:
D-21 / D-21 Series II
Series:
D-21, D-21 Series II, 210, 220
Vin Code Prefix:
Not Applicable (Tractor Identification)
Production Period:
Late 1950s - Early 1960s (approximate for D-21, 210/220 variations)
Target Audience:
Professional Technicians and Do-It-Yourself Mechanics
Manual Advantage:
Provides identical information to professional technicians, enabling comprehensive repair and maintenance
Content Focus:
Emphasis on detailed diagnostic and repair procedures for all aspects of the tractor
Value Proposition:
Cost-effective alternative to expensive paper manuals or professional repair services, with instant access
Manual Scope:
Full Service Repair, Maintenance, Diagnostics, Rebuilding, Refurbishing, Restoration
Diagnostic Procedures Coverage:
Includes specific procedures for diagnosing problems within the tractor's various systems.
Estimated Page Count:
Extensive (Specific count not provided, but described as 'very detailed' and covering 'everything')
Manual Classification:
Full Service Repair Manual
Engine Systems:
Engine overhaul, fuel system, lubrication system, cooling system, ignition system (if applicable), starting system
Drivetrain Systems:
Transmission (gearbox), clutch, differential, final drives, PTO (Power Take-Off)
Hydraulic Systems:
Hydraulic lift, hydraulic pump, hydraulic controls, hydraulic reservoir
Electrical Systems:
Wiring diagrams, starter, generator/alternator, battery system, lighting, instrumentation
Chassis And Steering:
Front axle, rear axle, steering mechanism, brakes, wheels, tires
Body And Frame:
Frame structure, fenders, operator station, controls
Steering System:
Manual and potentially power steering systems (depending on configuration), including components and troubleshooting.
Maintenance Procedures:
Regular servicing, lubrication, filter changes, fluid level checks, tune-ups
Repair Procedures:
Detailed step-by-step repair instructions for all major components
Diagnostic Procedures:
Troubleshooting guides for common and uncommon issues, electrical diagnostics
Rebuilding Procedures:
Comprehensive instructions for engine, transmission, and hydraulic unit rebuilds
Wiring Diagram Detail:
Detailed wiring diagrams are included, integrated with electrical service procedures for ease of diagnosis and repair.
Troubleshooting Guides:
Comprehensive troubleshooting sections are a key feature, aiding in the identification and resolution of mechanical and electrical faults.
Diagnostic Complexity:
Advanced diagnostics and troubleshooting combined with detailed wiring diagrams
Repair Detail Level:
Detailed sub-steps, notes, cautions, and warnings for critical information
Illustration Quality:
Detailed illustrations, drawings, and photos with enlarged insets for part examination
Engine Make Model:
Allis-Chalmers Diesel (Specific engine model not detailed in product info, but likely a variant of their own diesel offerings)
Horsepower Range:
Typically in the 70-90 HP range (Estimate based on tractor class and era)
Torque Output:
Torque specifications vary by engine variant, detailed in manual
Injection System:
Direct Injection (Typical for the era)
Cooling Method:
Water Cooled
Oil Type Spec:
Specific diesel engine oil (e.g., API CD or equivalent) required, detailed in manual
Transmission Type:
Manual Synchromesh (Likely)
Gear Configuration:
Multiple forward and reverse gears (Specific count to be found in manual)
Optional Gearbox:
Not specified in product information, but powershift options may have existed for some variants
Transmission Fluid Spec:
Specific tractor hydraulic/transmission fluid (e.g., TO-2 or equivalent) required, detailed in manual
Overall Length:
Varies by configuration, detailed in manual
Overall Width:
Varies by configuration, detailed in manual
Wheelbase:
Varies by configuration, detailed in manual
Operating Weight:
Typically in the 7,000 - 9,000 lb range (Estimate)
Infotainment System:
Not Applicable (Tractor of this era did not feature infotainment systems)
Driver Assistance Features:
Not Applicable (Tractor of this era did not feature driver assistance systems)
Connectivity Features:
Not Applicable (Tractor of this era did not feature connectivity)
Engine Oil Change:
Typically every 100-200 operating hours; specific interval detailed in manual
Air Filter Service:
Regular inspection and cleaning/replacement based on operating conditions; detailed in manual
Fuel Filter Replacement:
Scheduled replacement, typically annually or every 250-500 hours; detailed in manual
Engine Oil Capacity:
Approximately 10-12 quarts (Specific capacity to be found in manual)
Hydraulic Transmission Fluid Capacity:
Approximately 15-20 gallons (for transmission, hydraulics, and final drives combined; check manual for specific split)
Coolant Type:
Ethylene Glycol based coolant, typically 50/50 mix with distilled water; specific type and capacity in manual
Common Wear Items:
Clutch wear, hydraulic pump seals, PTO clutch discs, injector pump calibration, starter motor
Electrical System Aging:
Wiring harness degradation, generator/regulator issues common with older electrical systems
Manufacturer:
Allis-Chalmers Manufacturing Company, a major American farm equipment producer known for innovation
D21 Development:
The D-21 was a significant tractor for Allis-Chalmers, often representing a step up in power and features from previous models.
Series Ii Updates:
Series II likely incorporated minor updates and improvements based on field experience.
210 220 Designation:
The 210 and 220 likely represent specific configurations or later iterations of the D-21 platform, possibly with different engine options or features.
Production Era:
Production spanned several years in the late 1950s and early 1960s, reflecting a period of significant tractor development.
