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MG MGB User Manual

MG MGB
417 pages
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MW
Workshop
Manual
Publication
Part
No. AKD
3259 (14th Edition)
@
Leyland Cars—service
Cowley, Oxford OX4 2PG,
England

Table of Contents

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MG MGB Specifications

General IconGeneral
BrandMG
ModelMGB
CategoryAutomobile
LanguageEnglish

Summary

MGB Workshop Manual

Lubrication Chart

Details lubrication points and intervals for RHD/LHD models.

General Data (18G/18GA)

Provides technical specifications for the 18G/18GA engine.

Cooling System

Explains the cooling system's type, components, and settings.

Ignition System

Details ignition system components, timing, and settings.

Clutch

Lists clutch specifications and removal procedures.

Gearbox and Overdrive

Covers gearbox ratios, synchromesh, and overdrive specifications.

Rear Axle

Provides specifications for the rear axle type, ratio, and components.

Electrical Equipment

Lists electrical system components, capacities, and specifications.

Torque Wrench Settings

Specifies torque values for various engine and chassis components.

SECTION A THE ENGINE

General description

Describes the overhead-valve engine construction and operation.

Cylinder head assembly

Details the removal and assembly of the cylinder head.

Lubrication

Explains engine oil level checks, filter changes, and oil pressure.

SECTION B THE IGNITION SYSTEM

Distributor (Lucas type 25D4)

Covers distributor lubrication, servicing, and component details.

Ignition coil

Details ignition coil removal, testing, and resistance.

Static ignition timing

Explains procedures for setting static ignition timing.

SECTION C THE COOLING SYSTEM

General description

Describes the pressurized cooling system and water circulation.

Thermostat

Details thermostat removal, inspection, and refitting.

Draining, Flushing, and Refilling the Cooling System

Provides instructions for draining, flushing, and refilling the cooling system.

SECTION D THE FUEL SYSTEM

Carburetters

Covers carburetter adjustment, dismantling, and reassembly.

Fuel pump

Details fuel pump removal, refitting, and testing procedures.

Fuel tank

Explains fuel tank removal and refitting procedures.

SECTION E THE CLUTCH

Clutch assembly

Describes clutch components, removal, and dismantling.

Servicing the clutch

Details driven plate condition, tolerances, and clutch slip causes.

Master cylinder

Covers master cylinder removal, dismantling, and reassembly.

SECTION F THE GEARBOX

Lubrication

Explains gearbox oil level checks and draining procedures.

Removing the gearbox

Provides step-by-step instructions for gearbox removal.

Dismantling the gearbox

Details the disassembly of the gearbox components.

SECTION Fa THE OVERDRIVE (TYPE ‘D’)

Description

Explains the hydraulic system and construction of the overdrive unit.

Hydraulic lever setting

Details how to check and adjust the hydraulic lever setting.

Lubrication

Covers oil supply and draining procedures for the overdrive.

SECTION Fb THE GEARBOX (ALL SYNCHROMESH)

Gearbox assembly

Instructions for assembling the gearbox components.

Rear extension

Covers the removal, dismantling, and reassembly of the rear extension.

Selector rods and forks

Details the removal and refitting of selector rods and forks.

SECTION Fc THE OVERDRIVE (TYPE L.H.)

General description

Explains the construction of the Laycock Type L.H. Overdrive.

Hydraulic pressure test

Provides steps for testing hydraulic pressure in the overdrive.

Solenoid valve

Covers solenoid valve removal, dismantling, and refitting.

SECTION Fd THE AUTOMATIC GEARBOX

Maintenance

Outlines general maintenance checks for the automatic gearbox.

Road test procedure

Details the procedure for testing the transmission's performance.

Fault diagnosis

Lists common faults and their possible causes and checks.

SECTION G THE PROPELLER SHAFT

Lubrication

Describes lubrication points for the propeller shaft.

Removing and replacing

Provides instructions for removing and refitting the propeller shaft.

Dismantling the propeller shaft

Details the disassembly of the propeller shaft components.

SECTION H THE REAR AXLE AND REAR SUSPENSION (THREE-QUARTER FLOATING)

Lubrication

Explains oil level checks and draining for the rear axle.

Axle unit

Covers the removal and replacement of the rear axle unit.

Hub and axle shaft

Details the removal and replacement of the hub and axle shaft.

Renewing the pinion oil seal

Provides instructions for renewing the pinion oil seal.

SECTION Ha THE REAR AXLE AND REAR SUSPENSION (SEMI-FLOATING TYPE)

Lubrication

Explains oil level checks and draining for the rear axle.

Axle unit

Covers the removal and replacement of the rear axle unit.

Hub and axle shaft

Details the removal and replacement of the hub and axle shaft.

Renewing the pinion oil seal

Provides instructions for renewing the pinion oil seal.

SECTION J THE STEERING GEAR

Lubrication

Details lubrication points for the steering gear housing.

Front wheel alignment

Explains the procedure for checking and adjusting front wheel alignment.

Steering-Column

Covers the removal and replacement of the steering column.

SECTION K THE FRONT SUSPENSION

General description

Describes the independent front suspension design.

Lubrication

Explains lubrication points for suspension components.

Front Hubs

Details the construction and removal of front hubs.

Removing a hub

Provides instructions for removing the front hub assembly.

SECTION L THE HYDRAULIC DAMPERS

General description

Describes the double-acting hydraulic dampers.

Maintenance

Covers damper leakage checks and topping up procedures.

Removing and replacing the dampers

Provides instructions for removing and refitting front and rear dampers.

SECTION M THE BRAKING SYSTEM

General description

Explains the Lockheed hydraulic brake system components.

Maintenance

Details periodic checks for brake fluid and components.

Brake adjustment

Covers front and rear brake adjustment procedures.

Bleeding the system

Provides instructions for bleeding the hydraulic brake system.

SECTION Ma THE BRAKING SYSTEM (TANDEM MASTER CYLINDER)

Pedal free movement

Explains how to adjust the brake pedal free movement.

Tandem master cylinder

Covers master cylinder removal, dismantling, and reassembly.

Pressure failure switch assembly

Details the removal, dismantling, and refitting of the pressure switch.

SECTION N THE ELECTRICAL SYSTEM

Battery

Explains battery types, preparation, and maintenance.

Dynamo

Details dynamo testing on the vehicle and removal procedures.

Starter motor (Lucas Type M418 Pre-engaged)

Covers starter motor removal, dismantling, and inspection.

THE ELECTRICAL SYSTEM

Regulator Test

Explains testing and adjustment of the voltage and current regulators.

Solenoid coil

Details testing solenoid coil continuity and resistance.

Starter Motor Relay

Covers starter motor relay testing and adjustment.

SECTION Na THE ELECTRICAL SYSTEM

Instruments and switches

Explains the removal and refitting of dashboard instruments and switches.

Hazard warning flasher unit and audible warning buzzer

Details removal and refitting of hazard warning and buzzer units.

Sequential seat belt system control unit

Covers the removal and refitting of the sequential seat belt control unit.

THE ELECTRICAL SYSTEM

Sequential seat belt system circuit wiring diagram

Provides the wiring diagram for the sequential seat belt system.

THE ELECTRICAL SYSTEM

DIAGRAM 1 (Refer to page Nb.2 for the key)

Wiring diagram for early cars (positive earth).

DIAGRAM 2 (Refer to page Nb.2 for the key)

Wiring diagram illustrating components and connections.

THE ELECTRICAL SYSTEM

DIAGRAM 3 (Refer to page Nb.2 for the key)

Wiring diagram illustrating various circuits.

DIAGRAM 4 (Refer to page Nb.2 for the key)

Wiring diagram showing system layout.

THE ELECTRICAL SYSTEM

DIAGRAM 5 (Refer to page Nb.2 for the key)

Electrical system wiring diagram showing component layout.

THE ELECTRICAL SYSTEM

DIAGRAM 6 (Refer to page Nb.2 for the key)

Electrical system wiring diagram.

THE ELECTRICAL SYSTEM

DIAGRAM 7 (Refer to page Nb.2 for the key)

Electrical system wiring diagram illustrating various circuits.

THE ELECTRICAL SYSTEM

DIAGRAM 8 (Refer to page Nb.2 for the key)

Electrical system wiring diagram showing component connections.

THE ELECTRICAL SYSTEM

DIAGRAM 9 (Refer to page Nb.2 for the key)

Electrical system wiring diagram showing system components.

THE ELECTRICAL SYSTEM

DIAGRAM 10 (Refer to page Nb.2 for the key)

Electrical system wiring diagram with component identification.

THE ELECTRICAL SYSTEM

DIAGRAM 11 (Refer to page Nb.2 for the key)

Electrical system wiring diagram showing component layout.

THE ELECTRICAL SYSTEM

DIAGRAM 12 (Refer to page Nb.2 for the key)

Electrical system wiring diagram illustrating component relationships.

THE ELECTRICAL SYSTEM

DIAGRAM 13 (Refer to page Nb.2 for the key)

Electrical system wiring diagram detailing various components.

THE ELECTRICAL SYSTEM

DIAGRAM 14 (Refer to page Nb.2 for the key)

Electrical system wiring diagram showing system layout.

KEY TO THE WIRING DIAGRAMS

Key identifying components referenced in wiring diagrams.

SECTION O THE WHEELS AND TYRES

General description

Describes standard pressed-steel ventilated disc wheels.

Maintenance

Provides points for obtaining maximum mileage from wheels and tyres.

Tyre replacement

Details procedures for fitting radial-ply tyres and wheel rims.

Factors affecting tyre life

Explains factors influencing tyre wear like inflation and alignment.

SECTION R THE BODY

Alignment check (early cars)

Details vertical alignment checks for early car models.

Bodywork

Covers care and repair of coachwork, bright trim, and windscreen.

Bonnet and bonnet lock

Explains bonnet removal, lock, and safety catch procedures.

Door trim pad

Details the removal and refitting of door trim pads.

THE BODY

Coachwork repairs

Information on body construction repairs using acetylene outfits.

Bumpers

Covers front and rear bumper assembly removal and refitting.

Ventilators

Details the removal and refitting of face-level vents.

Door glass

Explains the removal and refitting of door glass and regulator.

THE BODY

Door locks

Covers door lock removal, adjustment, and refitting.

Remote control unit

Details the removal and refitting of door remote control units.

Latch unit

Explains the removal and refitting of the door latch unit.

THE BODY

Heater

Covers heater unit removal and refitting procedures.

Heater Fan Motor

Details the removal, dismantling, and testing of the heater fan motor.

Heater Matrix

Explains the removal and refitting of the heater matrix.

SECTION Ra THE BODY

Anti-burst door units

Describes the removal and refitting of anti-burst door units.

Bumpers and over-riders

Covers the removal and refitting of front and rear bumpers and over-riders.

Console

Details the removal and refitting of console components.

Fascia

Explains the removal and refitting of the fascia panel.

SERVICE TOOLS

ENGINE

Lists service tools for engine operations like camshaft and crankshaft work.

CLUTCH

Lists service tools for clutch operations like plate and seal replacement.

GEARBOX

Lists service tools for gearbox operations like bearing and shaft removal.

SERVICE TOOLS

AUTOMATIC GEARBOX

Lists service tools for automatic gearbox components.

REAR SUSPENSION AND FINAL DRIVE

Lists service tools for rear axle and final drive components.

FRONT SUSPENSION AND STEERING

Lists service tools for front suspension and steering components.

SERVICE TOOLS

FRONT AND REAR HUBS

Lists service tools for front and rear hub removal and replacement.

BRAKING SYSTEM

Lists service tools for brake system operations.

MISCELLANEOUS

Lists various miscellaneous service tools.

SERVICE TOOLS

Valve seat cutting

Lists cutters for valve seat finishing.

Valve seat grinding

Lists tools for valve seat grinding.

Clutch

Lists service tools for clutch operations.

SERVICE TOOLS

Crankshaft Gear, Pulley, and Propeller shaft Flange Remover

Tool for removing crankshaft gear, pulley, and propeller shaft flange.

Engine Front Cover Locating Bush

Tool for locating the engine front cover.

First Motion Shaft Assembly Replacer

Tool for replacing the first motion shaft assembly.

SERVICE TOOLS

Valve Seat Finishing Cutter (inlet)

Cutter for finishing valve seats (inlet).

Valve Seat Finishing Cutter (exhaust)

Cutter for finishing valve seats (exhaust).

Valve Seat Glaze Breaker (inlet)

Tool for breaking glaze on valve seats (inlet).

Valve Seat Glaze Breaker (exhaust)

Tool for breaking glaze on valve seats (exhaust).

SERVICE TOOLS

Valve Seat Narrowing Cutter—Top (inlet)

Cutter for narrowing valve seats (top, inlet).

Valve Seat Narrowing Cutter—Bottom (inlet)

Cutter for narrowing valve seats (bottom, inlet).

Selector Fork and Rod Guide

Guide for selector fork and rod alignment.

Bevel Pinion Flange Wrench

Wrench for bevel pinion flange adjustment.

SERVICE TOOLS

Differential Bearing Remover Adaptor

Adaptor for removing differential bearings.

Annulus Tail Shaft Bearing Remover and Replacer Adaptor

Tool for removing and replacing annulus tail shaft bearings.

Bevel Pinion Bearing Remover and Replacer Adaptor

Adaptor for removing and replacing bevel pinion bearings.

SERVICE TOOLS

Camshaft Liner Reamer Pilot—Front

Pilot for camshaft liner reaming.

Camshaft Liner Reamer Pilot—Centre

Pilot for camshaft liner reaming.

Camshaft Liner Reamer Pilot—Rear

Pilot for camshaft liner reaming.

Camshaft Liner Remover Adaptor

Adaptor for removing camshaft liners.

SERVICE TOOLS

Camshaft Liner Reamer Pilot—Front

Pilot for camshaft liner reaming.

Camshaft Liner Remover Adaptor

Adaptor for removing and replacing camshaft liners.

Rear Axle Casing Stretcher

Tool for stretching the rear axle casing.

SERVICE TOOLS

Bearing and Oil Seal Replacer (basic tool)

Basic tool for replacing bearings and oil seals.

Gearbox Rear Oil Seal Replacer Adaptor

Adaptor for replacing gearbox rear oil seals.

Crankshaft Spigot Bush Remover Adaptor

Adaptor for removing crankshaft spigot bushes.

Main Bearing Cap Remover Adaptor

Adaptor for removing main bearing caps.

SERVICE TOOLS

Front Clutch Piston and Seal Replacer

Tool for replacing front clutch pistons and seals.

Front Hub Bearing Cups Replacing Adaptor

Adaptor for replacing front hub bearing cups.

Dummy Layshaft

Layshaft used for timing and alignment purposes.

Steering-column Alignment Gauge

Gauge for checking steering-column alignment.

SERVICE TOOLS

Bevel Pinion Setting Gauge

Gauge for setting bevel pinion position.

Differential Case Assembly Gauge Pillar Adaptor

Adaptor for differential case assembly gauge.

Synchromesh Unit Assembly Ring—Second Speed

Ring for synchromesh unit assembly.

Synchromesh Unit Assembly Ring—Third and Top

Ring for synchromesh unit assembly.

SERVICE TOOLS

Pressure Test Adaptor

Adaptor for pressure testing.

Hydraulic Pressure Gauge

Gauge for measuring hydraulic pressure.

Bevel Pinion Bearing Outer Race Remover (basic tool)

Basic tool for removing bevel pinion bearing outer races.

SERVICE TOOLS

Bevel Pinion Bearing Outer Race Remover Adaptors—Rear

Adaptors for removing bevel pinion bearing outer races (rear).

Bevel Pinion Outer Race Remover and Replacer Adaptor (Rear)

Adaptor for removing and replacing bevel pinion outer races (rear).

Bevel Pinion Outer Race Remover and Replacer Adaptor (Front)

Adaptor for removing and replacing bevel pinion outer races (front).

Crankshaft Spigot Bush Remover Adaptor

Adaptor for removing crankshaft spigot bushes.

SERVICE TOOLS

Front and Rear Hub Remover (basic tool)

Basic tool for removing front and rear hubs.

Bolt Adaptor—¥2 in. UNF.

Adaptor for 1/2 in. UNF bolts.

Hub Remover Thrust Pad

Thrust pad for hub removers.

Wire Wheel Hub Remover (8 T.P.I.)

Tool for removing wire wheel hubs.

SERVICE TOOLS

Torque Wrench—30 to 140 lb. ft.

Torque wrench for various adjustments.

Torque Wrench Adaptor—¥2 to 3/8in. square drive

Adaptor for 1/2 to 3/8 inch square drive torque wrenches.

Torque Wrench Adaptor—3/8 to 1/2in. (9.5 to 8 mm.) internal

Adaptor for 3/8 to 1/2 inch internal torque wrenches.

Pressure Hose with Adaptor

Hose for pressure testing with adaptor.

SERVICE TOOLS

Swivel Axle Bush Reamer

Tool for reaming swivel axle bushes.

Brake Adjusting Spanner

Spanner for brake adjustments.

Switch Bezel Light Spanner

Spanner for switch bezels.

Gear Train End-float Checking Tool

Tool for checking gear train end-float.

SERVICE TOOLS

Clutch Plate Centralizer

Tool for centralizing the clutch plate.

Torque Screwdriver Set

Set of torque screwdrivers for precise adjustments.

Pistons Rear Clutch and Seal Replacer

Tool for replacing rear clutch pistons and seals.

SERVICE LUBRICANTS

Engine, Synchromesh, Gearbox and Carburetter

Lubricant recommendations for engine, gearbox, and carburetters.

Rear Axle and Steering Gear

Lubricant recommendations for rear axle and steering gear.

Upper Cylinder Lubrication

Lubricant recommendations for upper cylinder lubrication.

Automatic Transmission Fluid Type F

Specification for automatic transmission fluid.

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