Bentley R Type User manual

Handbook

t'rtr- -

Ine

Bentley R Type

Number XIV

Reprinted IWSW Pmduet Support (Graphics) Ltd.,3l7$nt

HE information contained in this book has been

arranged to facilitate reference, by condensing

all essential driving and upkeep instructions in

the first two chapters. Numerous references to other

parts are provided, whereby any particular instruction

may be amplified

if required.

Subsequent chapters include explanations of the

working of the various units or components of the

chassis,

and include detailed directions for lubrication

and maintenance.

Owners and drivers should, therefore, familiarise

themselves

with the first two chapters

in order to operate

the car successfully,

referring to the remainder of the

book at leisure,

or if necessarv.

A set of special spanners

and tools is supplied with

the chassis. It is most desirable that these should be

used

when effecting

any adjustment, as otherwise

vital

parts may be seriously damaged.

It is strongl,y

recovwneniled

that this booh be careful'ly

studied,

and the instructions

faithfully followed, to ensure

the greatest

satisfaction.

CONTENTS

Pecp

Cneprpn I.-SrenTING THE ENGINE

AND

Dnrvrwc rnr Can 2r

Starting the Engine-use of Starting Handle-Automatic Gear

changing-Tow starting-Fuel Feed-l.-uel Gaug_e-chassis

Lubricaiion-Controllable- Shock Dampers-Battery Charging-

Lighting control and switch-Accessories-Engine Thermostat

ani Thlermometer-Coolant Level in Radiator-Frost-Fitting

of Snow Chains.

Cseprnn II.-PnnIoDrc LurnrcerloN AND ATTENTIoN 27

Lubricants Recommended-Capacities-Points for Regular Atten-

tion according to Use of Car-Adjusting Valve Rocker Clearances.

Cneprrn III.-CnNTRALTsED CHASSIS

LUBRIcATIoN

General-Foot-operated Oil Pump-Drip Plugs. 35

Cneprnn IV.-ENGINE LusntcerloN Svs:rcna 39

Filling the System-Oil Pump-Oit Filter-Crankshaft and

ConnJcting Rods-Relief Valves-Valve Rockers, Push Rods and

Tappets-tamshaft-Oil Sump-Oil Level Indicator-Oil Pressure.

Cneprrn V.-Tsn FuBr Svsrnu

The Fuel System-Fuel Pumps-Faulty Operation of Pumps-Fuel

Tank-Fuei Filters-Fuel Gauge-The Carburetters (Action)-

Automatic Air Valve-Throttle eontrol-Automatic Choke Control

-Float Feed Mechanisms-Further Dismantling of carburetter-

Adjustment of controls-setting of Idling- Adjustments-Air

Cle-aner and Silencer (Standard Type)-Air Cleaner and Silencer

(Oil Bath Ttpe).

45

57

Cneprnn.VI.-Tur BnexrNG SYsTEM

General Description-Possible Variations-Adjustments-A.djust-

ment of Harid Brake-Adiustment of Servo-Lubrication-

Bleeding the Hydraulic System-Hydraulic Master Cylinder.

CnaprnR

VII.-GrARBox, Pnopnr,ER

SHAFT

AND

REAn

AxrB...

The Gearbox-Universal Joints- Rear Axle'

Cneprnn VIII.-STEERIN6, SnOcr Deupnns, Rortn Srntucs,

WsBBr,s AND TYREs 67

Steering Box and Column-steering-Front Suspension-lilarning,

Front -suspension Springs-steering Arms-and-Joitlt:Front

Stabiliser-lRear Hydiaulic Shock pampqlg-Rear Road Spjings-

Wheels-Wheel Discs-Lubrication of- Wheel Bearings-Tyres-

The Jacking System-Wheel Changing-Fitting- and Removing

Tyre{-Inflatjon of Tvres-Balaucing Road Wheels.

6s

Contents-continucd. Pecp

CgeprBn IX.-EIIGINE Coor,rxc

Sysrnu ... ... .., ... 79

coolant-coolant Pump and Fan-Fan Belt Adjustment-ovor-

heating-Engine Therniostat-Radiator Mounting-Frost and Anti

freeze Mixtures-Car Heater.

Cneprrn X.-Tlln Er,BcrnrcAl- SYsTEM ... o.. 85

.General-Dynamo-Fuse

Box-Output Re_gulator and cut-out-

Switchbox -- Ammeter - Battery - First Charge - Topping-Up-

Specific Gravity of _Electrolyte-charging-_ charging pattery from

oirtside sourc6-Maintenance-Ignition-Ignition coil-Ignition

Timing-Firing order of cylinders-spark-ing __Plugs- ltarter

Motor--starter Motor Switch-Micro-switch-use of starter

. Motor-Electric Fuel Pumps and Gauge-Electric Horns-De-

misting Equipment-Electrical Fault -Location-Recommended

Lamp -eulUi-Headlamps-Replacing a.Headlamp g"t- 4Igning

the i{eadlamps-The Si-de

Lamps-Radio-To set up The Tuning

Push Buttons.

Cneprrn XI.-Tss Bonv AND

CoAcHwoRK ... ro5

General-Windscreen Washing-Washing and Polishing-Doors-

Seat Slides-Upholstery and earpets-sliding Roof-Luggage and

Spare Wheel Compartrnents-Tools.

CneprBn XII.-SIoRAcE AND REcoMMISsIoNINc oF CARs III

Cneprpn XIII.-BENTLEY Scnoor, or INSTRUcTToN II3

INnnx.

INDBX

Pecn

"'30, 90

92

30' 33, 53,

...24,

gr

"'30' 90

Acid in Battery, Inspection of

Adjustment of Contact Breakers

Adjustment of Carburetter

Adjustment of Fan Belt

Adjustment of Brakes

Adjustment o{ Hand Brake...

Adjustment of Ignition Plugs 3r, 95

6r

Adjustment of Servo Motor

Adjustment of Valve Rockers

Aerial, Operation of ...

Air Silencer and Cleaner

Aligning the Headlamps

Ammeter gg

Anti-Freeze

Mixtures... ...2g, Er

Automatic Air Valve, Carburetter ...3o, 49

Automatic Choke, Carburetter 5r

34,

65

2E

92

Axle, Lubrication of Rear 28, 3t,

Axle, Oil Capacity of Rea,r

Battery, Care of

Battery, Charging

Battery,Jopping up...

Belt, Adjustment of Fan

Body, Washing and Polishing

Brakes, Adjustment of

Brake, Adjustment of Hand

Brushes,

Dynamo

Brushos, Motor ...33,

g6

52

8o

59

6o

32

r04

54

t02

8o

ro7

30, 59

6o

96

8Tue 'R' TypB BBNrrny.

Camshaft

Carburetter, Action of

Carburetter, Adjustment

Carburetter, Automatic Air Valve...

Carbnretter, Float Feed Mechanism

Carburetter, Needle Valve

Centralised Chassis Lubrication

Chains on Road Wheels

Changing Gear

.Changing a Wheel

Chassis, Leading Particulars of

Chassis Lubrication, Centralised

Coil, Ignition

Cold Weather, Water in Cooling

Condenser of Contact Breaker System ,,.26,

Connecting Rcids

Contact Bieaker

Control Mechanism, Lubrication of

Coolant

Level in Radiator ... ..i ...25,

Coolant Mixture

Coolant Temperature

Crankshaft

Cut-out, Automatic

Cylinders, Firing Order of

Dampers, Hydraulic Shock

Pecn

42

48

52

30, 49

52

5o

35

z6

22

73

r7

35

93

8r

92

4r

92

3r

79

8r

4r

87

95

Dampers, Governor for Hydraulic Shock

De-froster arrd De-mister, Operating

Distributor, fgnition

Doors

24, 32, 68, 69

7o

97

92

r07

3I

26, 8z

37

33, 86

86

87

85

48, 97

97

85

33,

Draining Engine

Draining CoolingCrankcase

System

Drip Plugs

Dynamo

Dynamo Erushes

Dynamo Connections

Dynamo Output Regulator

Earth Connection of Batterv

Electric Fuel Gauge

Electric Horns

Electric Lighting, Starting and Ignition System

23'

INoBx.

Electrical Fault Location

Electrolyte, Inspection of

Engine Cooling System, Capacity ...

Engine Lubrication System...

Engine, Quantity of Oil in... .;.

Engine, Starting the

Fan, Engine Cooling...

Fan Belt Adjustment ...

Filler Plug, Gearbox

Filling Rear Axle Casing

Pecs

g8

30, 90

z8

39

zB

2T

8o

28, 30'34'

3r, 34,

64

65

40

47

95

52

8r

46

45

97

e7

47

87

98

87

63

27

z8

22

Filter, Engine Oil ... 30,

Filter, Cleaning Fuel

Firing Order of Cylinders

Float Feed Mechanism, Carburetter

Frost, Precautions

during ...25,

Fuel, Failure of Supply of

Fuel Feed System ...23,

Fuel Gauge

Fuel Pumps

Fuel Filters

Fuel Tank

Fuse Box

Fuse Wire

23, 48,

Fuses, Failure of

Fuses, Replacing

Fuses, Spare

Gearbox 27, 3c

, 34,

Gearbox, Oil for

Gearbox, Oil Capacity of

Gqar Changing

Glycol in Cooling System ...25,

Governor Controlling Hydraulic Shock Dampers

Greases, Recommended

HeadlEmps

Headlamps, Alignment

Headlamps, Replacing Bulb

Heater, Car

Iforns, Electric

I{ubs, Wheel

79

7r

27

roo

t02

roo

8z

97

7r

6r

Hvdraulic Brakes Bleedin

IO Tnn 'R' TvpB Brurrny.

Hydraulic Shock Dam

Hydraulic Master Cylipers ... 24, 32,

nder ...

assrs ...27,

39

27, 30, 63

Prcp

68, 69

33, 62

92

27

34, 65

72

r09

99

Ignition, Battery

Ignition Coil 93

Ignition Plugs... ... 3r, 95

Ignition Sv-itch

Ignition, Timing

zt, 24,8g

Instruction Class, Bentley

Jack, Portable Wheel

'Joints, Universal ...32, 64

Lamp Bulbs, Recommended 99

Lamps, Head ... roo

Lighting Control ...24, 89

Lubricating Oils and Greases

Recommended 27

Lubrication, Centralised Ch

Lubrication, Engine ...

Lubrication, Gearbox

Lubrication, Periodic

Lubrication, Rear Axle

35

28, 3T,

Lubrication, Wheel Bearings

Luggage and Spare Wbeel ...

Missing Fire

Motor, Servo 6r

Motor, Starter ...32,

95

Oil in Engine, Quantity of ... z8

Oil in Gearbox and Back Axle z8

Oil Level Indicator, Engine...

Oil Pressure

Oil Relief Valve

Oil Relief Valve, Dismantling

Oil Pump, Chassis

Oil System, Engine

Oils Recommendedfor Bentley Cars

Output Regulator,

Dynamo...

Overheating

Pivots, Steering

Plugs, Standard Settings lor

Propeller Shaft Sliding Joint

93

I13

72

43

4r

37

39

27

87

8o

69

"'3r' 95

"'?2 64

IunBx. IT

Pump, Engine Oil

Pumps, Fuel

Pump, Coolant

Radiator, Draining

Radiator Mounting ...

Radiator Thermostat

Radiator, Coolant Level in "' z5' 8t

Radio

Rear Axle, Quantity of Oil

Replacing a Headlamp Bulb

Road Springs, Lubrication of

Road Wheels, Balancing

Rocker Shaft ...

Rockers, Valve

Seat Slides ...

Service Facilities

Servo Motor, Action of

Servo Motor, Adjustment of

Slow Running..

Sliding Roof

Snow, Use of Chains for Driving on

Spare Wheel Compartment ...

Spark Gaps, Standard

Spring Shackles, Lubrication of

Springs, Road

Stabiliser, Front

Starter Motor ...

Starter Motor Bearings

Starter Motor Brushes

Starter Motor Connections ...

Starter Motor, Failure of Operation of

Starter Motor Lubrication

Starter Motor Switch

Starter Motor, Use of

Starting, Control Settings {or

25'

Pear

40

46, 97

8o

26, 8z

8r

29, 79

r03

zB

IOO

7r

7s

42

ro8

r6

57

6r

I02

52

r09

z6

r09

3I, 95

36, 7r

7r

6g

32, 95

95

g6

q8

32, 96

96

g6

Shock Dampers, Hydraulic ... 24,

32,68,69

Side Lamps

Starting the Engine

Steering Box, Oiling

Steering Joints

29, 3t,

2l

67

6g

t2 Tup 'R' Typa BBNrrBv.

Steering Pivots

Storage of Car

Pecp

6g

III

37

68

Strainer, Chassis Oil Pump

Suspension,

Independent Front

Switchbox 89

8q

96

8r

Switch, Ignition 2T, 24,

Switch, Starter Motor

Temperature of Coolant

Thermometer, Coolant Temperature

Thermostat, Engine

Throttle Control

Tools

Tow Starting ..

Tyre Pressures

Tyres, Sizes of

Tyres, Removal

Upholstery and Carpets

Universal Joints

Valves, Oil Relief

Valve Rockers...

Valve Rocker Adjustment

Valve Tappets...

Wheels, Balancing Road

Wheel, Changing a

Wheel Hubs

Wheel Nuts

Whoel, Removing a

Windscreen Washing Equipment

and Fitting

25,

25'

25,

5o

ro9

23

29, 75

t8, 7z

74

ro8

32, 64

4r

42

32

42

7s

73

7r

r05

INoBx or IrrusrRATroNS. r3

INDEX OF ILLUSTRATIONS

Frc. Pecp

No. No.

Adjusting the Inlet Valve Rocker Clearances...

Air Cleaner-Standard Type

Air Cleaner-Oil Bath Type

Axle Casing, Rear

I3ox, Fuse, Output Regulator and Cut-out

Brakes, Adjustment of Front

Brakes, Adjustment of Rear

Braking System, Diagram of

Carburetters, in Position on

Carburetter, Exploded View Engine

Chassis Lubrication System, Diagram of

Chassis

Oil Pump ...

Contact Breaker and Distributor

Contact Breaker, Interior View

Controls, Driver's

Controls, Radio

Crankcase Drain Plug

Damper, Rear Hydraulic Shock

Diagram of Braking System

Diagram, Electrical Wiring

Door Hinges

Drain Tap Cylinder Jacket

Dynamo

Engine Lubrication System

Engine Oil Filler Cap and Dipstick

Engine Oil, Relief Valves.

Entered Stud at Top

Fan Belt Adjustment

Filter, Rear

Fitting Jack to Slide

Front Brake Adjustment

Front Compartment Picnic Table

Front Hub and Wheel, Section of

Fuel Pumps...

3

r5

r6

2+

42

r8

r9

t7

I3

I4

J

4

43

4+

I

5o

IO

27

r7

4o

53

38

4r

6

9

33

37

t2

z8

r8

s4

35

II

42

32

53

54

66

88

6o

56

48

5o

36

35

93

94

20

r03

43

7o

56

85

ro8

8z

86

39

42

74

8o

47

73

6o

ro8

76

45

88

Fuse Box, Output Regulator and Cut-out

r4 TnB 'R' Tvpn BBrstrnv.

Gearbox Access Points

Gearbox, Underneath View

Gear Range Selector Lever

Guide to Crewe Service Station

Guide to Main Service Station

Headlamp, Changing the

Heater Isolating Tap

Hydraulic Shock Damper, Front

Hydraulic Shock Damper, Rear

Elydraulic Master Cylinder and

Bulb

58 rr5

57 IT4

47 IoI

3e 83

z6 68

27

20

+5

5

6

Frc.

No.

2T

22

2

Prcr

No

63

64

22

94

36

39

IIO

95

73

40

42

73

65

35

r03

6o

77

32

74

68

7o

6r

Lubrication System,

Luggage and Spare

Ignition Coil Chassis

Engine

Wheel Compartment

Motor, Starter

Mounting Rear Wheel

Oil Filter

Oil Relief Valves, Engine

Operating Wheel Jack

Positioning Rear Wheel

Propeller Shaft

Pump, Chassis Oil...

Radiomobile Controls ...

Rear Brake Adjustment ...

Rear Hub and Wheel, Section of

Rockers, Adjusting Valve...

Rotating Front Wheel

Shock Damper, Front Hydraulic

Shock Damper, Rear Hydraulic

Reservoir

56

46

3o

8

9

29

3r.

23

4

5o

i9

36

3

32

z6

Side Lamp

Starter Motor

Steering Column

Upholstery, fnterior

Wheel Balance Weights

Windscrepn Washing Equip,ment

Windscreen Washer, Reservoir and Pump

Wiring Diagram, Electrical

27 70

48 ro2

49 ro2

46 95

25 67

55 ro9

34 76

5r ro5

52 ro6

40 85

THE

SECRET

OF SUCCESSFUL

RUNNING

Before a Bentley car is sold, it is very carefully

tested and adjusted

by experts. It will run best if

no attempt is made to interfere unnecessarily

with

adjustments.

An owner would do well to instruct his driver as

follows:-

Lubricate effectively, in strict accordance

with

the advice given in this book, and do not neglect

ony part.

Inspect all parts regularly, but take care not to

alter any adjustments unless really necessary.

r5

SERVICE

FACILITIBS

FOR BENTLEY CARS

our interest in your Bentley car does not cease

when you take delivery of the car. It is our ambition

that every purchaser

of a Bentley car shall continue

to be more than satisfied.

With this end

in view,

the "Special

Retailer,,,

through

whom the car was

purchased,

has estabrished

a properly

equipped

Service

Station,

staffed

by men who have

been

specially

trained in servicing

Bentley cars.

In addition,

on

the

staff

of Bentley

Motors

(r93r)

Ltd.,

there are experts whose sole duty it is to maintain

contact with the "special Retailers", and they are

available,

at all times, to be called in for consultation

on any matters affe6ting

your car.

If, therefore,

you require

any assistance,

we ask that

you should

immediately

contact the "special Retailer",

who will be only too pleased

to place his facilities at

your disposal.

If necessary

he will call in for consultation

our expert in that area. It is earnestly

hoped that this

arrangement

will prove of mutual benefit, as we shall

thus be kept in constant

touch with our customers,

who

may be spared

the trouble of a long journey to one of

our Company's

Service

Stations.

In the event of it being more convenient

to call on

us direct for assistance,

our main Service station at

Hythe Road, Willesden,

London N.W.ro, and the one

at our factory at crewe,

will be ready.at

all times

to help.

(See

maps

at end

of Handbook.)

r6

LEADING PARTICULARS OF CHASSIS

Engi ne,

Six

cylinGers,

3&"

(gzm/m.)

bore,

4t" Fr4m/m.) stroke,

4,566

c.c.,

cubic capacity.

Mono-bloc

casting, detachable cylinder head, overhead

inlet valves,

side exhaust valves.

Aluminium alloy pistons.

Engine Lubrication.

Pressure feed to all crankshaft and connecting rod bearings.

Relief valve, providing positive low-pressure supply to the valve

rocker shaft, from which the inlet valves,

push rods and tappets

are

lubricated.

Two-gallon capacity sump.

Ganburetten.

Two special type S.U.

Air intake silencer and air cleaner.

Fuel System.

Eighteen-gallon

tank at rear of chassis.

Supply by electric pumps.

Fuel level gauge

and warning light on instrument board. The warning

light indicates when fuel is low.

Cooling Systotn.

By centrifugal pump circulation and fan. Thermostatically

contrblled. Coolant temperature

thermometer

on instrument board.

Electrical Equipment,

Twelve-volt system with automatic regulation of dynamo output.

Starter

motor with reduction gear

and pinion providing

gentle

engage-

ment. Battery of 55 ampere-hour capacity.

Geanbox,

Four forward speeds and reverse. Fully automatic with over-

riding hand and "kick-down" change

speed control.

Glear

Ratios.

Rear Axle rst znd 3rd 4th Speed. Reverse.

Ratio. Speed. Speed. Speed. (Direct.)

3,I3:r 14.23:r g.8z:t 5.4:r 3.I3;r t6.o4:r

Rear Axle.

Semi-floating type. Hypoid gears with differential. Torque and

brake reactions taken by road springs.

Rear Suspeneion.

Semi-elliptic springs in combination with controllable hydraulic

shock dampers.

Fnont

Suspension.

Independent;

open helical springs

in combination

with hydraulic

shock dampers.

Steering.

Cam-and-roller

type.

Bnakes.

Hydraulic operation on front wheels, mechanical

operation on

rear wheels assisted

by mechanically driven servo motor.

Hand brake operates

on rear wheels.

Chassie

Lubrioation.

Centralised

chassis

lubrication system supplied by foot-operated

pump and reservoir on dashboard.

Road Wheele,

Detachable

steel wheels, fitted with 6.5o" by 16' India Super

Silent Rayon tyres. r8

Dimensions.

Total length overall,

Width of car ...

Wheelbase

Track-Front ...

Rear

Turning circle...

Weight (kerbside)

Overall height

including bumpers ...

38$

cwts.

r6', 7t"

5' r.o"'

ro' oo

4' 8+"

4' Tot"

4T' 20

(approx.

).

5' 5f"

Ghassis

and Engine Numbers.

The chassis

number will be found on the identification plate fixed

.to the front of the dashboard

under the bonnet, and also stamped on

the left-hand side frame member

just in front of the dashboard, under

the bonnet.

The engine number is stamped either on the front left-hand

crankcase

lifting lug, or on a boss on the crankcase above the front

left-hand lifting lug.

r9

20 TsB 'R' Typn BsNruBy.

f3l4l ?o lB 19 2l

Fig.

1.-GENERAL

VIEW

OF DRIVER'S

CONTROLS.

1. Steering

wheel.

2. Gear range

selector.

3. Ride

control.

4. Hand brake.

5. Side

scuttle

ventilator. (Pull-open,

push-shut).

6, Accelerator pedal.

7. Brake pedal.

8. Dip-switch.

9. Cigar lighter. (Push-in,

lighter springs

up when ready

for use.)

10. Instrument

lights. (Pull-on,

push-off.)

11. Screen

wiper switch. (Turn clockwise,

first position-normal, second

position-fast.)

12. Fuel

warning light. (Steady

glow at 2-3

gallons

reserve.)

13. Oil level indicator. (Press

button and read

on fuel gauge

dial.)

14. Direction

indicator

warning

light (when

fitted).

15. Map lamp

switch. (Push-on,

push-off.)

15. lgnition

warning

light.

17. Trafficator. (Self-cancelling.)

18. De-mister booster fan. (Turn clockwise,

first position-fast, second position-slow.)

19, Fog

lamp. (Pull-on,

push-off.)

20. Rear window de-mister. (Pull-on,

push-off.)

21 Heater. Turn clockwise,

first position-fult on, second

position-medium.)

Srenrrwc rnn ENcTNE

AND Dnrvrxc rnn Cen. 2l

CHAPTER I

Starting the Bngine and Driving the Car

_, Starting the Engine-Use of Starting Handl,e-Automatic Gear

C h

an

ging

7-T ou S t

ar ting

-F u

el,

F e

ed-F u eI G aug e-C has

si

s

Lub

r i cati

o n

-c ontr

ol,l,abl

e S

ho ck D

arnp er s-B att ery C

har

ging-Li ghting C ontr

ol,

and

Suitck-Accessories-Engine Thermostat anA- Theirnomiter-Coolant

Leael,

in Radiator-Frost-Fitting of Snoa Chains.

Starting the Engine,

Switch on the ignition by turning master and ignition switches

on the instrument board to On.

The master

switch controls all the electrical

system, excepting

the

electric clock, inspection and roof lamps, the latter being left always

available for convenience

when entering the car in the dark.

A small red warning light on the instrument board will be illumi-

nated

when the ignition is switched

on, but will be extinguished

when

the engine

speed is sufficient

to cause the cut-out contacts

to close.

Ensure

that the gear

lever on the steering column is in neutral,

quadrant gear position "N", as it is only in this position that the

starter switch is operable.

Before starting the car in temperatures

aboae

freezing point, f,rst

defress

the accel'erator

pedal,

slightl,y and tken al,loa it to return t6 its

norrnal

position. This permits the throttle stop on the carburetter to

re-position

itself correctly according

to engine temperature.

-

Under v_ery cold conditions, in temperatures of below freezing

p-oint, it will be necessaly_

to depress the accelerator pedal slightlR

about a quarter of its full travel, and hold it depressed

while the

starter button is being operated. Immediately the engine fires, the

accelerator

pedal should be released.

Depress

the starter button firmly, an appreciable

pause must be

made

between

the operatign;

of switching

on the ignition and,

depressing

tke starter button, especially

uhen making a start from cold.

- This ii

necessary

in order to give the pumps time to fill the float chambers

of the carburetters.

Use of Starting Handle.

, It,is imperatiae

uhen starting the cngine

with the starting hand,l,e,

that tke gear leaer

must be at Neutral,.

22 TttE 'R' TypB Bpr.lrrpv.

Automatic Gean Changing'

The gearbox is fully automatic in operation_

throughout the r?nge

of the g"ear ratios; however,

a manuaf control let'er is mounted on

the stee"ring

column, by means of which a selectio1

Tay be made

of

the desired."ranges

best"suited

to the operating conditions,

thus glvilg

the driver great"er flexibility of the conirol and enabling

him to use

his

judgment and skill.

Three forward speed

ranges

are provided, also

neutral and reverse.

The quadrant is marked as follows:-

. The gear ratios available in each of the positions are as under:-

"4"--Top, 3rd, znd and rst.

rrr"-Jrd, 2nd and rst.

"2"-2Y1d and fSt.

For all normal driving conditions the lever is placed

in the position

marked " 4" , when all fdur speed.s

are available under the control of

the auto**ti. "control unit"] which will select the suitable gear ratio

according to the degree

of throttle opening and the speed

of the car.

The gear

lever quad-

rant is provided with a

gate between positions

" 2" and"3" and

a button

on the lever has to be

depressed to move in or

out of neutral or into

reverse,

thus preventing

inadvertent engagement

with an unwanted gear.

For greater control

of the car when touring

in hilly or difficult coun-

try, the gear lever

should be placed in the

position marked "3".

The change either up or

down, between 4th and

3rd speed,

can be made

at any *noment by the

simple moverRent of the

lever. Easing the press-

ure on the accelerator

R.

2.

3.

4.

N.

Fig.

2.-GEAR RANGE

SELECTOR

LEVER.

1. Lever.

2. Neutral and reverse lock button.

3. Underseat

heater.

4. De-mister. (Pull out-hot, push in-cold.)

pedal facilitates the change, but this is not essential.

Should

the driver desire

maximum acceleration,

he may obtain a

lower ge?r at full throttle by depressing

the accelgr_atgr

pedal beyond

the no-rmal limit of its travel, so actuating the kick-down switch.

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Bentley R Type User manual

Bentley R Type User manual

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