Target Audience:
Owners, mechanics, technicians, and restoration enthusiasts of David Brown 850/950 Implematic tractors.
Value Proposition:
Provides comprehensive, factory-level technical information for essential maintenance and repair, eliminating the need for costly professional diagnostics or service.
Content Quality:
Hundreds of pages with detailed photos, diagrams, and step-by-step instructions.
Accessibility:
Instant download for immediate access on various devices.
Completeness:
Full factory workshop manual, covering all aspects of repair and servicing.
Hydraulics System:
Comprehensive coverage of the Implematic hydraulic system, including pump, control valve, cylinders, and linkage.
Engine Service:
Detailed procedures for engine maintenance, overhaul, and troubleshooting.
Transmission And Drivetrain:
Information on gearbox, differential, rear axle, and PTO maintenance and repair.
Electrical System:
Wiring diagrams, component testing, and troubleshooting for the tractor's electrical systems.
Cooling System:
Radiator, thermostat, water pump, and fan maintenance and repair.
Fuel System:
Carburetor or fuel injection system servicing, fuel pump, and filter replacement.
Braking System:
Brake adjustment, lining replacement, and hydraulic system maintenance.
Steering System:
Steering box maintenance, linkages, and wheel alignment procedures.
Chassis And Bodywork:
Frame, fenders, dashboard, and operator controls repair and adjustment.
Power Take Off Pto:
Service and repair procedures for the PTO engagement and drive mechanism.
Instrumentation And Controls:
Information on dashboard gauges, levers, pedals, and switches.
Troubleshooting Guides:
Extensive troubleshooting charts for common and uncommon issues.
Routine Maintenance:
Step-by-step instructions for all scheduled maintenance tasks.
Major Repairs:
Detailed procedures for complete engine rebuilds, transmission overhauls, and hydraulic system repairs.
Component Disassembly And Reassembly:
Highly detailed exploded diagrams and instructions for every component.
Adjustment Procedures:
Precise adjustment instructions for clutch, brakes, linkage, and more.
Torque Specifications:
Accurate torque values for all critical fasteners.
Hydraulic System Calibration:
Procedures for calibrating the hydraulic control system for optimal performance.
Engine Timing Adjustment:
Details on setting ignition timing and valve clearances.
Wheel Alignment And Tracking:
Specifications and procedures for ensuring correct wheel alignment.
Depth:
Professional-grade, suitable for mechanics and experienced technicians.
Diagnostic Procedures:
In-depth diagnostic procedures for identifying and resolving mechanical and electrical faults.
Illustrations:
Hundreds of detailed photos and diagrams, including exploded views.
Searchability:
Likely contains searchable text, facilitating quick access to information.
Printability:
Full page printing capability.
Binding:
Digital Download (No physical binding)
Paper:
Digital (Printable on standard paper)
Usage Rights:
Lifetime use, unlimited devices, no expiry.
Operating Systems:
Windows and macOS compatible.
Engine Type:
David Brown 4-cylinder diesel engine (specific model designation not provided in product info, but typically AD4/55 or similar variants).
Horsepower:
850 model typically around 40-45 HP, 950 model typically around 45-50 HP (depending on specific engine variant and tuning).
Torque:
Specifications vary by engine variant but generally optimized for torque at lower RPMs for agricultural work.
Injection System:
Typically indirect injection, possibly rotary or inline injection pump (e.g., CAV Simms or similar).
Cooling Method:
Water-cooled, pressurized system.
Engine Oil Change:
Typically every 100-150 operating hours or annually.
Air Filter Service:
Regular inspection and cleaning, replacement as needed or every 250-500 hours.
Fuel Filter Replacement:
Typically every 250-500 operating hours or annually.
Engine Oil Type:
API CD or higher specification diesel engine oil (e.g., 15W-40 or 20W-50 depending on climate).
Hydraulic Fluid Type:
Hydraulic Transmission Fluid (HTF) or equivalent tractor hydraulic fluid with anti-wear additives.
Transmission Fluid Type:
Often shared with hydraulic system (HTF).
Coolant Type:
Ethylene glycol based antifreeze mixed with distilled water (typically 50/50 ratio).
Grease Type:
General purpose lithium-based grease for lubrication points.
Implematic Hydraulic Issues:
Potential for seal leaks, control valve wear, or hydraulic pump inefficiency leading to loss of lift or drift.
Engine Wear:
Common wear items include piston rings, valve guides, and bearings due to age and operational hours.
Clutch Wear:
Clutch wear is a standard maintenance item, especially with heavy use.
