Value Proposition:
Presented as the most complete and least expensive AC D21, 210 & 220 Repair Manual available.
Manual Utility:
Invaluable technical manual with detailed diagrams and manufacturer specifications for maintenance and servicing.
Accessibility:
Instant download, searchable, bookmarked, and printable content.
Primary Coverage:
Shop Service and Repair for Allis-Chalmers D-21, D-21 Series II, Two-Ten (210), and Two-Twenty (220) tractors.
Estimated Page Count:
Likely substantial; typical comprehensive shop manuals for this era of tractor range from 500-1000+ pages, though specific count not provided.
Type:
Shop Service Repair Manual
Format:
PDF (Portable Document Format)
Engine And Fuel:
Engine overhaul, diesel fuel system (injection pumps, injectors, fuel lines, filters), cooling system (radiator, thermostat, water pump).
Drivetrain:
Clutch, transmission, differential, final drive (including gears, bearings, seals).
Steering And Brakes:
Steering system (mechanics, hydraulic components if applicable), brake system (mechanics, hydraulic or mechanical components).
Electrical And Hydraulic:
Electrical system (wiring diagrams, starter, alternator, battery, lighting), Power Lift System, Power Steering, Power Take-Off (PTO).
Front And Chassis:
Front system (axle, steering components), general chassis components.
Maintenance And Tuneups:
Routine maintenance, lubrication, tune-up procedures, fluid level checks, filter replacements.
Diagnostics And Troubleshooting:
Problem identification, diagnostic charts, troubleshooting steps for various systems.
Repair And Overhaul:
Step-by-step instructions for component disassembly, repair, reassembly, and adjustment for all covered systems.
Technical Specifications:
Detailed specifications, tolerances, clearances, torque values, and settings.
Depth:
Comprehensive; covers detailed service and repair procedures suitable for professional mechanics and advanced DIY users, including complete rebuilds.
Digital Features:
Searchable text, keyword search functionality, bookmarked chapters for easy navigation.
Printability:
Print entire manual or specific sections.
Binding:
N/A (PDF format)
Reader Requirement:
Adobe Acrobat Reader (latest version recommended for optimal display).
Operating Systems:
Compatible with Windows and Mac operating systems.
Engine Type:
Diesel (Specific engine models for D-21, 210, 220 should be confirmed via internal manual sections, but typically inline 4 or 6 cylinder Diesels).
Typical Horsepower Range:
The D-21 and its successors were powerful utility tractors of their era, with horsepower typically in the 60-80 PTO HP range, but specific figures depend on engine variant and configuration.
Injection System:
Likely CAV or Bosch inline injection pumps and injectors, common for diesel engines of the 1960s and 1970s. Manual covers servicing and calibration.
Cylinder Head Torque:
Specific torque values for cylinder head bolts will be detailed in the manual, crucial for proper sealing and engine longevity. Typically sequential torquing with re-torquing procedures are documented.
Valve Lash Adjustment:
Instructions for checking and adjusting valve lash will be provided, with specific cold/hot settings and procedures for rocker arm adjustment.
Transmission Type:
Likely a multi-speed manual transmission with a range selector (e.g., 2WD, potentially 4WD options for some models/configurations). Specific gear configurations and speeds will be detailed.
Power Take Off:
The manual covers the Power Take-Off (PTO) system, including its engagement, maintenance, and potential repairs for rear PTO and possibly front PTO.
Engine Oil Change:
Typical intervals for diesel tractors of this era are around 100-250 operating hours or annually, but the manual will provide the precise recommended interval based on operating conditions and oil type.
Fuel Filter Replacement:
Recommended replacement intervals for primary and secondary fuel filters will be documented, crucial for maintaining fuel system integrity.
Engine Oil Type:
The manual will specify the correct API service classification (e.g., CD or higher for diesel) and viscosity grade (e.g., SAE 30, 15W-40) for the engine oil. Specific Allis-Chalmers recommended oils may be listed.
Hydraulic Fluid Type:
Specifies the type and viscosity of hydraulic fluid required for the power lift, power steering, and other hydraulic systems. Often a universal tractor transmission fluid (UTTO) or specific hydraulic oil. Capacity will also be listed.
Transmission Fluid:
Details the specific transmission lubricant and capacity. For tractors with integrated transmission/hydraulic systems, the same fluid may be used.
Common Wear Points:
While not explicitly listed in product info, manuals of this type often address common wear issues in final drives, clutch throw-out bearings, and PTO splines, which are high-stress components in heavy-duty tractors.
Diesel Injection System Maintenance:
Addresses potential issues with injection pump timing, injector nozzle performance, and fuel system sealing, common maintenance areas for older diesel engines.
Manufacturer Legacy:
Allis-Chalmers was a prominent American manufacturer of agricultural and construction machinery, known for its distinctive 'Allis-Chalmers Orange' color and innovative designs. The D-series tractors represent a significant part of their tractor lineup.
Model Progression:
The D-21 was introduced as a high-horsepower tractor, with subsequent models like the 210 (Two-Ten) and 220 (Two-Twenty) representing refinements and updates to the D-21 platform, offering improved features and performance.
Production Era:
These tractors were primarily produced in the late 1960s and 1970s.
