Target User:
Owners, mechanics, and restoration specialists of David Brown Selectamatic tractors from the 1970-1979 era.
Value Proposition:
Provides comprehensive, factory-level repair and maintenance information, essential for preserving and servicing these classic agricultural machines.
Manual Access:
Instant download provides immediate access to critical service data.
Completeness:
Covers a wide range of models and systems, representing a full workshop manual.
Engines:
Diesel engines (specific models to be detailed within manual)
Transmissions:
Selectamatic transmission system
Drive Types:
2WD (Rear-wheel drive) typically
Steering Systems:
Power steering and manual steering systems
Braking Systems:
Hydraulic braking systems (disc and drum configurations if applicable)
Electrical Systems:
12-volt electrical systems, lighting, ignition, starting circuits
Hydraulic Systems:
Tractor hydraulics, PTO hydraulics, linkage systems
Chassis And Bodywork:
Frame, fenders, operator station, drawbar
Auxiliary Equipment:
Power Take-Off (PTO), linkage, hydraulic remote valves
Estimated Pages:
Comprehensive (exact count not specified but expected to be extensive for full factory manual)
Type:
Factory Service & Repair Workshop Manual
Primary Language:
English
Delivery Method:
PDF Download
Engine Overhaul:
Detailed disassembly, inspection, repair, and reassembly procedures for all engine components.
Transmission Repair:
In-depth coverage of the Selectamatic transmission, including hydraulic system, gear selection, and final drive repairs.
Clutch And Drive Axles:
Maintenance and repair of the clutch assembly and rear drive axles.
Steering Mechanism:
Adjustment, repair, and overhaul of steering gears and linkages.
Brake System Maintenance:
Brake caliper/wheel cylinder overhauls, hydraulic line replacement, bleeding procedures.
Electrical Diagnostics:
Wiring diagrams, troubleshooting guides for starting, charging, lighting, and auxiliary electrical systems.
Hydraulic Circuitry:
Diagrams and repair procedures for the tractor's main hydraulic system, including pumps, valves, and cylinders.
Cooling System:
Radiator, thermostat, water pump, and coolant flow troubleshooting.
Fuel System Service:
Diesel injection pump and injector maintenance, fuel filter replacement, bleeding.
Pto And Hitch Systems:
Service and adjustment of the Power Take-Off (PTO) and the three-point hitch.
Routine Maintenance:
Oil changes, filter replacements, lubrication points, and general inspections.
Troubleshooting Guides:
Diagnostic procedures for common and uncommon faults across all systems.
Component Replacement:
Step-by-step instructions for replacing major and minor components.
Adjustment Procedures:
Settings and adjustments for engine timing, clutch engagement, brake linkages, hydraulic pressures.
Overhaul Instructions:
Comprehensive rebuild instructions for engines, transmissions, and hydraulic pumps.
Electrical Wiring Diagrams:
Detailed wiring schematics for all electrical circuits.
Diagnostic Capabilities:
Advanced diagnostic procedures, fault finding based on symptoms and measurements.
Repair Complexity:
Covers everything from basic adjustments to full engine and transmission rebuilds.
Specification Detail:
Includes detailed torque specifications, clearances, tolerances, and fluid capacities.
Format:
Portable Document Format (PDF)
Resolution And Clarity:
High-resolution, clear images and text for easy reading and printing.
Delivery Format:
Digital Download (No physical binding)
Digital Medium:
Digital file for viewing on computers, tablets, and smartphones.
Engine Type:
Typically 3-cylinder or 4-cylinder indirect injection diesel engines (specific models vary).
Displacement:
Varies by model; common displacements include around 2.5L to 3.6L (e.g., AD4.203, AT4.236).
Horsepower Range:
Typically 40-70 HP, depending on the specific model and engine variant.
Torque Characteristics:
Designed for strong low-end torque, suitable for agricultural applications.
Injection System:
Indirect injection, typically with CAV or Bosch fuel injection pumps.
Transmission Type:
Selectamatic (Hydromechanical transmission with variable speed control)
Gearbox Variants:
Likely a single primary transmission type, the Selectamatic, with variations in gear ratios for specific models.
Speed Control:
Infinitely variable speed control within ranges via a lever and hydraulic actuation.
Hydraulic Pump:
Integral hydraulic pump for transmission operation and implement control.
Overall Length:
Varies by model, typically around 3.3-3.8 meters.
Overall Width:
Varies by model, typically around 1.7-2.0 meters (track width adjustable).
Wheelbase:
Varies by model, typically around 2.0-2.2 meters.
Operating Weight:
Approximately 2000-2500 kg, depending on configuration.
Tare Weight:
Refer to specific model specifications within the manual.
Engine Oil Change:
Typically every 250-300 operating hours (refer to manual for precise intervals).
Transmission Fluid Change:
Annually or every 500 operating hours (refer to manual for specific fluid type and interval).
Fuel Filter Replacement:
Regular replacement as per operating hours or if issues arise (e.g., every 250 hours).
Engine Oil:
API CD or equivalent, SAE 30 or 15W-40 (verify in manual based on ambient temperature).
Transmission Hydraulic Fluid:
Specific hydraulic transmission fluid (HTF) or equivalent, such as JD-J20C or Massey Ferguson M1127 (verify exact specification in manual).
Coolant:
Ethylene Glycol based antifreeze mixture (50/50 with water).
Selectamatic Control:
Potential for hydraulic leaks or control issues in the Selectamatic system due to age and wear.
Engine Seals:
Common wear and tear on engine seals leading to oil leaks.
Electrical Corrosion:
Deterioration of wiring and connections due to age and environmental exposure.
David Brown Legacy:
David Brown was a significant British tractor manufacturer known for robust and reliable agricultural machinery.
Selectamatic Introduction:
The Selectamatic transmission was a key innovation, offering unparalleled ease of control and versatility for its time.
Manufacturing Location:
Principally Meltham, Yorkshire, England.
