David Brown 850 880 950 990 Series Implematic Tractor Service & Repair Workshop Manual Download PDF

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This manual covers the David Brown 850, 880, 950, and 990 Series Implematic tractors, produced from the late 1950s through the 1960s and into the early 1970s. These robust machines,...

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Taper: Tractor

Distributeur:

UGS: 81258

Mots clés: 850 850 Implematic 880 950 990 Agriculture David Brown Tractor Tractors

Variantes de produits

Description

This manual covers the David Brown 850, 880, 950, and 990 Series Implematic tractors, produced from the late 1950s through the 1960s and into the early 1970s. These robust machines, manufactured by David Brown Tractors Ltd. in Huddersfield, England, are known for their reliable engineering and the innovative Implematic hydraulically assisted transmission system, designed to enhance operational ease and efficiency in agricultural tasks. This series of tractors features four-cylinder diesel engines, typically producing between 40-60 HP, and are equipped with constant mesh gearboxes, live PTO, and heavy-duty rear axles. This comprehensive Factory Service Repair Workshop Manual provides detailed guidance for owners, mechanics, and technicians. It encompasses a wide array of critical systems, including the engine, fuel, cooling, lubrication, transmission and drivetrain, hydraulic system, electrical components, brakes, steering, and chassis. The manual offers step-by-step instructions for maintenance, diagnostics, troubleshooting, and repair operations, including engine rebuilds and transmission overhauls. With hundreds of pages of information, complete with diagrams and photos, this English-language manual is an essential resource for maintaining and repairing these classic David Brown tractors.

🏷️ Basic Information

Identification

Make:

David Brown

Model:

850, 880, 950, 990 Series Implematic

Product Type:

Service & Repair Workshop Manual

👋 Introduction

Market Position

Target Audience:

David Brown tractor owners, mechanics, technicians, restoration enthusiasts

Competitive Analysis

Value Proposition:

Provides professional-level repair and maintenance information for a broad range of David Brown Implematic models, enabling self-sufficiency in upkeep and repairs.

Key Features

Content Quality:

Factory-level detail with hundreds of pages of information, including photos and diagrams.

Accessibility:

Instant PDF download for immediate access on various devices.

📋 Manual Details

Coverage Areas

Vehicles Covered:

David Brown 850 Implematic, David Brown 880 Implematic, David Brown 950 Implematic, David Brown 990 Implematic

Engine Variants Covered:

Diesel (specific engine codes to be detailed in manual)

Page Count

Estimated Pages:

Hundreds (exact count not specified but described as very detailed with hundreds of pages)

Manual Type

Type:

Factory Service Repair Workshop Manual

Language

Language:

English

Format

Format:

Downloadable PDF

📖 Manual Coverage

Systems Covered

Engine Service:

Complete overhaul, diagnostics, tuning, component replacement

Fuel System:

Fuel injection pump, injectors, fuel lines, filters, bleeding procedures

Cooling System:

Radiator, thermostat, water pump, hoses, coolant specifications

Lubrication System:

Oil pump, oil filter, oil pressure, oil specifications and capacities

Transmission And Drivetrain:

Gearbox, differential, rear axle, PTO (Power Take-Off), Implematic hydraulics

Hydraulic System:

Implement control system, hydraulic pump, valves, cylinders, fluid specifications

Electrical System:

Starter motor, alternator, battery, lighting, wiring diagrams, ignition system (if applicable)

Braking System:

Brake operation, adjustments, fluid specifications

Steering System:

Steering box, linkage, adjustments

Chassis And Suspension:

Front axle, steering components, rear axle housing

Bodywork And Fittings:

Fenders, seat, controls, dashboard components

Procedures Included

Maintenance:

Scheduled servicing, oil changes, filter replacements, lubrication points, general upkeep

Troubleshooting:

Diagnostic charts, fault finding for all major systems, common problems and solutions

Repair Operations:

Step-by-step instructions for component removal, overhaul, and reassembly

Engine Rebuild:

Detailed procedures for dismantling, inspecting, and rebuilding the engine

Hydraulic System Repair:

Repair of hydraulic pump, valves, rams, and control mechanisms

Transmission Overhaul:

Procedures for gearbox, differential, and PTO unit repairs

Electrical Diagnostics:

Troubleshooting electrical faults using wiring diagrams and test procedures

Technical Depth

Depth:

Comprehensive (covers all repairs, servicing, and troubleshooting procedures)

Detail Level:

High (detailed photos, diagrams, exploded views, step-by-step instructions)

Torque Specifications:

Essential torque values for all critical fasteners will be included.

Clearances:

Engine valve clearances, bearing clearances, gear backlash, etc. will be specified.

Timing Specifications:

Engine timing procedures and specifications will be detailed.

📊 Manual Specifications

File Format

Format:

Searchability:

Likely searchable text-based PDF (standard for professional manuals)

Print Quality

Print Capability:

Print single pages or entire manual

Compatibility

Operating Systems:

Windows and MAC computers

Licensing

Usage License:

Unlimited use on multiple devices, no expiry

⚙️ Engine Specifications

Primary Engine

Engine Type:

Four-cylinder, direct-injection diesel engine (specific engine families like AD4.177, AD4.203, etc. likely covered)

Performance

Horsepower Range:

Varies by model, typically 40-60 HP (exact figures per model and series variant to be confirmed in manual)

Torque Range:

Varies by model, designed for agricultural applications (specific figures to be confirmed in manual)

Fuel System

Injection System:

Bosch or CAV fuel injection pumps (specific types to be detailed)

Fuel Type:

Diesel

🔧 Transmission

Standard

Gearbox:

Constant mesh gearbox with multiple forward and reverse gears (e.g., 10 forward, 2 reverse)

Features

Implematic Transmission:

Unique David Brown hydraulically assisted transmission system for clutch operation and implement control (detailed operation and servicing covered)

Live PTO, 540 RPM (typical, specific configurations may vary)

Rear Axle:

Heavy-duty rear axle with differential lock (manual engagement)

📐 Dimensions

Exterior

Wheelbase:

Varies by model and configuration (specifics in manual)

Weights

Operating Weight:

Approximately 4,000 - 5,500 lbs (1800 - 2500 kg) depending on model and configuration

💡 Technology Features

Infotainment

Features:

Basic tractor instrumentation: Tachometer, oil pressure gauge, water temperature gauge, ammeter. No modern infotainment.

Driver Assistance

Features:

Mechanical linkage for steering and controls, PTO engagement. No electronic driver assistance features.

Connectivity

Features:

N/A – mechanical and direct operation.

🔧 Maintenance

Service Intervals

Engine Oil Change:

Typically every 100-150 operating hours or annually (specific interval in manual)

Fuel Filter Replacement:

Recommended at specified intervals or when experiencing fuel system issues (e.g., every 250 hours)

Hydraulic Fluid Change:

Typically every 500-1000 operating hours or annually

Fluid Specifications

Engine Oil Type:

API CD or equivalent, SAE 30 or 10W-30 depending on climate (specifics in manual)

Hydraulic Fluid Type:

David Brown Hy-Trans fluid or equivalent (e.g., UTF - Universal Tractor Transmission fluid) – specific viscosity and GL ratings will be detailed.

Coolant Type:

Ethylene glycol based antifreeze/coolant (e.g., 50/50 mix with distilled water)

Known Issues

Hydraulic System Leaks:

Common with age, often related to worn seals or hoses. Manual will detail repair.

Engine Starting:

Glow plug system and fuel system priming are critical for cold starts. Manual covers troubleshooting.

Transmission Engagement:

Wear in clutch components or Implematic system can affect gear changes. Manual details adjustment and repair.

📚 Vehicle History

Brand Heritage

Manufacturer:

David Brown Tractors Ltd., Huddersfield, England

Company Focus:

Known for robust, well-engineered tractors, particularly in the post-war era.

Model Evolution

Implematic Introduction:

The Implematic transmission was a key development, offering enhanced operational ease and efficiency for agricultural tasks.

Production

Production Period:

The 850, 880, 950, and 990 series were produced from the late 1950s through the 1960s, with some overlapping into the early 1970s.