Bentley 3.5 & 4.25 Derby Repair Maintenance Service Manual-PDF

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🏷️ Basic Information Identification Make: Bentley Model: Derby Model Variant: 3.5 Litre & 4.25 Litre Generation Model Years Covered: 1933-1936 (for 3.5 Litre), 1936-1937 (for 4.25 Litre) 👋 Introduction Market...

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类型: Car

斯库: 197329

标签: 3.5 & 4.5 Litre Bentley Car Cars Derby

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Description

🏷️ Basic Information

Identification

Make:

Bentley

Model:

Derby

Model Variant:

3.5 Litre & 4.25 Litre

Generation

Model Years Covered:

1933-1936 (for 3.5 Litre), 1936-1937 (for 4.25 Litre)

👋 Introduction

Market Position

Target Audience:

Bentley Derby owners, mechanics, restorers, and enthusiasts

Value Proposition:

Provides essential factory-authorized information for maintaining and repairing classic Bentley Derby models.

Restoration Focus:

Essential for owners undertaking period-correct restorations, ensuring accuracy in mechanical work.

Competitive Analysis

Uniqueness:

Factory service manual content, offering precise specifications and procedures unavailable in generic workshop manuals.

Key Features

Navigation Ease:

Fully bookmarked chapters and searchable text for efficient information retrieval.

Download Method:

Instant download, no waiting.

📋 Manual Details

Coverage Areas

Manual Type:

Factory Repair and Maintenance Service Manual

Language:

English

Format:

Digital Features:

Searchable, Bookmarked, Indexed

Source Of Information:

Factory original documentation.

📖 Manual Coverage

Systems Covered

Engine Systems:

Engine overhaul, tuning, lubrication, cooling system, ignition system

Drivetrain Systems:

Clutch, gearbox, rear axle and drive-shafts, front axle (rigid)

Chassis Systems:

Brakes, steering, springs and shock dampers, hubs

Electrical Systems:

Electrical and ignition system

Body And Chassis:

Front axle (rigid), Steering, Springs and shock dampers, Hubs

Procedures Included

Maintenance Procedures:

Regular maintenance, tune-ups, lubrication schedules, fluid specifications

Repair Procedures:

Detailed step-by-step repair instructions for all major mechanical components

Diagnostic Procedures:

Troubleshooting guidance based on symptoms

Special Tool Information:

Includes details on special tool kits required for specific repair procedures.

Technical Depth

Depth Of Information:

Comprehensive, from basic maintenance to detailed rebuild procedures

Illustrations And Diagrams:

Numerous pictures, diagrams, exploded views, and photos

📊 Manual Specifications

File Format

Digital File Type:

Print Capability:

Printable (entire manual or specific sections)

Compatibility:

All versions of Windows & Mac

Binding Type

Binding:

N/A (Digital PDF)

Paper Type

Paper Type:

N/A (Digital PDF)

Manual Completeness

Completeness Statement:

This is a comprehensive factory service manual covering all specified chapters, providing complete repair and maintenance coverage.

⚙️ Engine Specifications

Primary Engine

Engine Type 3.5 Litre:

Inline 6-cylinder, Overhead Valve (OHV)

Engine Displacement 3.5 Litre:

3669 cc (223.9 cu in)

Engine Bore 3.5 Litre:

82.55 mm (3.25 in)

Engine Stroke 3.5 Litre:

114.3 mm (4.50 in)

Engine Type 4.25 Litre:

Inline 6-cylinder, Overhead Valve (OHV)

Engine Displacement 4.25 Litre:

4267 cc (260.4 cu in)

Engine Bore 4.25 Litre:

88.9 mm (3.50 in)

Engine Stroke 4.25 Litre:

114.3 mm (4.50 in)

Compression Ratio 3.5 Litre:

Approximately 5.25:1 (refer to manual for exact variations).

Compression Ratio 4.25 Litre:

Approximately 5.25:1 (refer to manual for exact variations).

Performance

Horsepower 3.5 Litre:

Approx. 75-80 bhp (figures varied with tuning)

Horsepower 4.25 Litre:

Approx. 90-95 bhp (figures varied with tuning)

Fuel System

Fuel Delivery 3.5 Litre:

Single or Twin SU Carburettors (depending on specification)

Fuel Delivery 4.25 Litre:

Single or Twin SU Carburettors (depending on specification)

Lubrication

Oil Type Recommendation:

Specific viscosity grades as per manual (likely SAE 30 or 20W-50 for period, refer to manual for exact spec)

Oil Capacity 3.5 Litre:

Refer to manual (typically around 6-7 quarts/litres)

Oil Capacity 4.25 Litre:

Refer to manual (typically around 7-8 quarts/litres)

🔧 Transmission

Standard Transmission

Gearbox Type:

Manual Transmission

Number Of Gears:

Typically 4-speed manual

Features

Gearbox Oil Specification:

Specific gear oil viscosity as per manual (e.g., SAE 90 Hypoid or GL-4 specification)

Clutch Type:

Single Dry Plate Clutch

📐 Dimensions

Weights

Kerb Weight Approx:

1500-1700 kg (model and body style dependent)

🔧 Maintenance

Service Intervals

Lubrication Schedule:

Regular chassis lubrication (grease points) and oil changes as specified in the manual (e.g., every 3,000-5,000 miles or annually).

Fluid Specifications

Brake Fluid Type:

Hydraulic fluid for Lockheed hydraulic systems (refer to manual for specific type, likely DOT 3 equivalent of the era or mineral oil if system was converted).

Coolant Specification:

Water with anti-corrosion additives (traditional practice).

Known Issues

Common Wear Items:

Gaskets (oil leaks), water pump seals, brake system components (cylinders, hoses), clutch components, electrical contacts.

Engine Maintenance Considerations:

Valve adjustments, ignition timing, carburetor synchronization, ensuring proper lubrication.

Technical Specs Required

Engine Timing Settings:

Specific ignition timing advance (BTDC) figures for different RPMs provided in manual.

Valve Clearances:

Specific cold valve clearance settings for intake and exhaust valves (in thousandths of an inch or mm).

Carburetor Jet Sizes:

Recommended jet sizes and needle profiles for SU carburetors for optimal tuning.

Spark Plug Gap:

Specified spark plug type and gap setting (e.g., 0.025 inches).

Wheel Alignment Specs:

Camber, caster, and toe-in specifications for front and rear axles.

Brake Adjustment:

Procedure and specifications for adjusting mechanical or hydraulic brakes.

📚 Vehicle History

Brand Heritage

Brand Origin:

Founded in 1919 by Walter Owen Bentley.

Model Evolution

Derby Introduction:

The Derby was Bentley's first model under Rolls-Royce ownership, introduced after the financial difficulties of the original Bentley Motors.

Model Naming:

Named after the location of the Rolls-Royce factory where it was produced.

Engine Development:

The 4.25 Litre was an enlarged version of the 3.5 Litre engine, offering increased power and torque.

Production

Production Period 3.5 Litre:

1933-1936

Production Period 4.25 Litre:

1936-1937