Systems Covered:
Engine, Fuel System, Ignition System, Lubrication System, Cooling System, Exhaust System, Transmission, Clutch, Hydraulics, Power Take-Off (PTO), Steering System, Braking System, Electrical System, Chassis, Bodywork, Front Axle, Rear Axle, Final Drives
Estimated Pages:
High (Detailed workshop manuals for tractors are typically extensive, often exceeding 300 pages)
Type:
Workshop Service Repair Manual
Engine:
Detailed overhaul, repair, and troubleshooting of the David Brown diesel engine powering the 1200 series. Includes cylinder head, pistons, connecting rods, crankshaft, camshaft, valve train, timing gears, and lubrication system.
Fuel System:
Comprehensive coverage of the fuel injection system, including pumps, injectors, fuel lines, filters, and troubleshooting of fuel delivery issues.
Ignition System:
Focus on diesel engine operation which does not have a traditional ignition system in the automotive sense. May cover glow plug systems if applicable to the specific 1200 variant.
Lubrication System:
Details on the oil pump, oil filter, lubrication passages, oil pressure testing, and recommended lubricants and capacities.
Cooling System:
Information on the radiator, thermostat, water pump, coolant specifications, and troubleshooting of overheating or cooling system leaks.
Exhaust System:
Coverage of the exhaust manifold, exhaust pipe, muffler, and troubleshooting exhaust leaks or restrictions.
Transmission:
Detailed procedures for the removal, inspection, repair, and installation of the transmission. Includes gear shifting mechanisms, bearings, and seals.
Clutch:
Instructions for clutch inspection, adjustment, replacement of clutch disc, pressure plate, and release bearing.
Hydraulics:
Information on the hydraulic pump, control valve, hydraulic cylinders, lift arms, and hydraulic fluid specifications and troubleshooting.
Pto:
Details on the Power Take-Off (PTO) engagement mechanism, PTO shaft, and associated components.
Steering System:
Coverage of the steering box, steering linkages, and any power steering components if equipped.
Braking System:
Procedures for brake adjustment, repair of brake cylinders, brake linings/pads, and troubleshooting of braking performance.
Electrical System:
Wiring diagrams, troubleshooting of the starting system, charging system (alternator/generator), lighting, and instrumentation.
Chassis:
Information on the frame, hitch components, and drawbar.
Bodywork:
Procedures for the removal and installation of fenders, hood, seat, and dashboard components.
Front Axle:
Details on the front axle beam, kingpins, steering knuckles, and wheel bearings.
Rear Axle:
Information on the rear axle housing, differential, final drives, and rear wheel mounting.
Maintenance:
Routine servicing, lubrication points, filter changes, fluid level checks, and general upkeep procedures.
Diagnostics:
Troubleshooting guides for common problems, symptom-based diagnostics, and diagnostic procedures for each system.
Repair Overhaul:
Step-by-step instructions for the disassembly, repair, reassembly, and adjustment of all major components and systems.
Tune Ups:
Procedures for engine tuning, including timing adjustments, fuel system calibration, and general performance optimization.
Removal Installation:
Detailed instructions on how to safely remove and install major components like the engine, transmission, axles, and hydraulic units.
Proprietary Components:
Integration of instructions from manufacturers of proprietary components used within the David Brown 1200 to ensure comprehensive repair understanding.
Depth:
Comprehensive; covers everything from routine maintenance and adjustments to complete engine and transmission rebuilds. Assumes familiarity with general automotive/mechanical practices but emphasizes product-specific details.
Routine Maintenance Schedule:
Detailed schedules for checking and changing engine oil, filters (oil, fuel, air), coolant, transmission fluid, and hydraulic fluid based on operating hours or time.
Engine Oil Type:
Typically SAE 30 or 15W-40 diesel engine oil (API CD or similar specification). Manual will specify exact grade and capacity.
Transmission Hydraulic Fluid:
Usually a universal tractor transmission oil (UTTO) or a specific hydraulic fluid meeting David Brown's specifications. Manual will detail the type and capacity.
Coolant Type:
Ethylene glycol-based antifreeze mixed with distilled water. Manual will specify the correct ratio and type.
Common Wear Points:
Potential areas for wear include clutch components, PTO spline wear, hydraulic pump efficiency, and engine seal leaks. The manual provides diagnostic procedures for these.
Troubleshooting Guides:
The manual offers specific troubleshooting trees for various common problems encountered with the David Brown 1200, such as hard starting, loss of power, or hydraulic system malfunctions.