Target Audience:
        
        
            Mechanics and DIY persons (even comparatively new personnel).
        
     
    
    
        
            Value Proposition:
        
        
            Provides detailed, step-by-step procedures and explanations, aiming for satisfactory after-service.
        
     
    
    
        
            Ease Of Use:
        
        
            Prepared with simple explanations, easy to read reference book.
        
     
    
        
            Diagnostic Focus:
        
        
            Includes diagnostic information and troubleshooting sections.
        
     
    
        
            Safety Emphasis:
        
        
            Highlights safety measures with DANGER, CAUTION, or NOTE remarks.
        
     
 
    
    
    
        
            Engine:
        
        
            Comprehensive coverage including disassembly, assembly, adjustments, and troubleshooting.
        
     
    
        
            Transmission:
        
        
            Detailed procedures for repair, adjustment, and maintenance.
        
     
    
        
            Drivetrain:
        
        
            Includes rear axle, differential, and PTO (Power Take-Off) servicing.
        
     
    
        
            Hydraulics:
        
        
            Information on the hydraulic system, including pumps, valves, and cylinders.
        
     
    
        
            Electrical System:
        
        
            Diagnosis, testing, and repair of electrical components and wiring.
        
     
    
        
            Steering System:
        
        
            Procedures for steering mechanism adjustment and repair.
        
     
    
        
            Braking System:
        
        
            Service and adjustment for the tractor's braking system.
        
     
    
        
            Cooling System:
        
        
            Maintenance and repair of the radiator, thermostat, and related components.
        
     
    
        
            Fuel System:
        
        
            Coverage of fuel tank, lines, and potential adjustments.
        
     
    
        
            Chassis And Frame:
        
        
            Information regarding structural integrity and component mounting.
        
     
    
        
            Operator Station:
        
        
            Details on controls, seat, and dashboard components.
        
     
    
    
        
            Maintenance:
        
        
            Periodic maintenance, lubrication, and general upkeep procedures.
        
     
    
        
            Troubleshooting:
        
        
            Detailed diagnostic guides for identifying and resolving common problems.
        
     
    
        
            Repair:
        
        
            Step-by-step repair instructions for all major components.
        
     
    
        
            Disassembly:
        
        
            Comprehensive guides for component removal and breakdown.
        
     
    
        
            Assembly:
        
        
            Detailed instructions for reassembling components after repair or service.
        
     
    
        
            Adjustments:
        
        
            Precise instructions for all necessary adjustments and calibrations.
        
     
    
        
            Installation:
        
        
            Guidance for installing new or rebuilt components.
        
     
    
        
            Testing:
        
        
            Methods for testing component functionality and system performance.
        
     
    
    
        
            Coverage Level:
        
        
            Extremely detailed, comprehensive, bumper-to-bumper coverage.
        
     
    
        
            Diagrams:
        
        
            Includes pictorial diagrams, exploded diagrams, drawings, and photos.
        
     
    
        
            Special Tools:
        
        
            References special tool numbers and provides illustrations of tools in use.
        
     
    
        
            Specifications:
        
        
            Includes service data, factory specifications, allowable limits, and tightening torques.
        
     
    
        
            Wear Limits:
        
        
            Provides wear limits for components where applicable.
        
     
    
        
            Construction And Function:
        
        
            Explains the construction and function of components to aid understanding before servicing.
        
     
 
    
    
    
        
            Engine Type:
        
        
            Diesel (Specific engine model not provided in product information, but typical for D21)
        
     
    
        
            Engine Displacement:
        
        
            Not specified in product information, but typically around 300 cubic inches for D21.
        
     
    
        
            Engine Configuration:
        
        
            Not specified in product information, but likely inline 6-cylinder diesel.
        
     
    
    
        
            Horsepower:
        
        
            Not specified in product information.
        
     
    
        
            Torque:
        
        
            Not specified in product information.
        
     
    
    
    
        
            Injection System:
        
        
            Not specified in product information.
        
     
 
    
    
    
        
            Periodic Maintenance:
        
        
            Manual stresses the importance of respecting service schedules for maximum satisfaction.
        
     
    
    
        
            Lubricants:
        
        
            Manual specifies the use of approved lubricants.
        
     
    
        
            Engine Oil Type:
        
        
            Not specified in product information, but typically diesel engine oil of appropriate grade for the era.
        
     
    
        
            Hydraulic Fluid Type:
        
        
            Not specified in product information, but typically a tractor hydraulic fluid.
        
     
    
    
        
            Common Problems:
        
        
            The manual is designed to help identify and rectify issues, implying common problems are addressed.
        
     
    
    
        
            Preventative Maintenance:
        
        
            Investigate unusual noises and changes in riding characteristics promptly.
        
     
    
        
            Record Keeping:
        
        
            Keep complete records of all maintenance and repairs.