Tractor Segment:
Heavy-duty agricultural tractor, designed for substantial farm work
Competitors:
Competed with similar horsepower tractors from manufacturers like John Deere, Ford, Massey Ferguson during its production era.
Power Takeoff:
Typically featured a robust PTO system for implements.
Traction And Power:
Designed for high drawbar pull and efficient operation in demanding agricultural conditions.
Primary Coverage:
All mechanical and electrical systems of the Allis-Chalmers Model D-21 Series II Tractor
Estimated Page Count:
Extensive (specific count not provided, but described as 'very detailed')
Type:
Service/Repair Manual
Format:
Print (implied by sales context, though digital may also exist)
Engine Overhaul:
Comprehensive instructions for engine disassembly, inspection, repair, and reassembly
Transmission Service:
Detailed procedures for transmission, clutch, and PTO maintenance and repair
Hydraulic System:
Coverage of hydraulic pump, cylinders, control valves, and fluid service
Electrical System:
Wiring diagrams, starter, alternator, ignition, and lighting system diagnostics and repair
Fuel System:
Carburetor/injection system overhaul, fuel pump, and filter service
Cooling System:
Radiator, thermostat, fan, and coolant maintenance
Braking System:
Brake mechanisms, hydraulic lines, and master cylinder service
Steering System:
Steering box, linkage, and power steering (if equipped) repair
Chassis And Suspension:
Front axle, rear axle, and wheel bearing service
Bodywork And Sheet Metal:
Repair and adjustment of body panels and fenders
Routine Maintenance:
Oil changes, filter replacements, lubrication points, and general inspection procedures
Troubleshooting Guides:
Diagnostic procedures for common problems and symptoms
Component Rebuilds:
Detailed instructions for rebuilding major components like engines, transmissions, and hydraulic pumps
Adjustment Procedures:
Valve adjustments, clutch adjustments, brake adjustments, etc.
Torque Specifications:
Accurate torque values for critical fasteners and assemblies
Schematics:
Detailed electrical and hydraulic schematics
Depth:
Comprehensive; suitable for full rebuilds and advanced diagnostics
Digital Format Consideration:
If digital, typically PDF; quality of scans, text searchability, and clarity are key
Print Quality:
Assumed to be high for a dedicated service manual (clear text, legible diagrams)
Binding:
Likely a sturdy binding suitable for shop use (e.g., spiral bound, perfect bound)
Paper Quality:
Durable paper stock, potentially glossy for diagrams, to withstand shop environment
Engine Make Model:
Allis-Chalmers (engine model specific to D-21 Series II, often diesel)
Displacement:
Approx. 425 cubic inches (7.0 Liters) - *exact displacement to be confirmed by the manual*
Horsepower Rated:
Around 90-100 PTO horsepower - *exact figures dependent on specific engine tuning and configuration as per manual*
Injection System:
Likely a mechanical injection system (e.g., Roosa Master, Simms, or similar depending on sourcing)
Transmission Type:
Constant Mesh Gear Transmission (likely with multiple forward and reverse gears)
Powershift Option:
Some high-horsepower tractors of this era offered powershift options; manual would detail this if applicable.
Gear Configuration:
Typically 8 forward and 4 reverse gears, or similar configuration - *manual to confirm specifics*
Clutch Type:
Dual-stage clutch for independent PTO engagement and transmission drive
Wheelbase:
Approx. 90-100 inches - *manual to provide precise measurement*
Overall Length:
Approx. 140-150 inches - *manual to provide precise measurement*
Operating Weight:
Around 8,000 - 10,000 lbs (without ballast) - *manual to provide exact weight*
Engine Oil Change:
Typically every 100-250 operating hours; manual will specify exact interval and oil type.
Hydraulic Fluid Change:
Often annually or based on operating hours; manual will detail frequency and fluid specification.
Engine Oil Viscosity:
Likely 15W-40 or 10W-30 diesel engine oil - *manual to confirm grade and API service classification (e.g., CD, CE)*.
Hydraulic Fluid Type:
Tractor Hydraulic Fluid (THF) or equivalent; manual to specify exact type and brand compatibility.
Transmission Oil Type:
Gear oil or specialized transmission fluid depending on design - *manual to confirm viscosity and specification*.
Coolant Type:
Ethylene glycol based antifreeze; manual to specify ratio and type.
Common Wear Points:
Wear in transmission gears, clutch wear, hydraulic pump seals, and diesel injection system components are typical for tractors of this age.
Electrical Gremlins:
Corrosion in wiring connectors, aging starter solenoids, and alternator issues are common.
Manufacturer History:
Allis-Chalmers was a prominent American manufacturer of agricultural and construction equipment, known for innovation and distinctive orange paint.
D21 Series Ii Development:
The D-21 was Allis-Chalmers' flagship large tractor of its era, with the Series II representing an updated version with potentially improved features or engine.
Production Period:
The D-21 series was produced from the mid-1960s through the early 1970s. Series II would fall within this range.
