Scania Brake Service Manual

10:00-01

Issue 2 en

Brake Diagram Manual

B6

SK 6

35

3

MAD 16

27

11

12

4

SJ 6

52

28

61d

6

PG

10b

17

12

21

11

22

16

12

16

65

84

10a

MP 6

16

MK 6

MV 16

MA

MAM

6

4

74

22

1

MU 8

PZ 12

B2

21

13

55

PH 6 PE

BCC 6 FAF 12 FBO 6

XCF 12

55

PK 6

B1

8

B5

PC BAF 12 BAG 12 FBC 12 FAG 12

16

MAO

1

58c

19

XCE 12

B3

Opt.

PO 6

55

36

3236323632

MBK 12 MBJ 12 MBH 12

Opt.

39

2

55

FB

12

51

1

7k

FAV 12

FBS 12

FA 12

1

51

22 21

11 23 24

4

BA 12

PA 12

XM 12

57

12

22

11

41

42

43

SAV 8

55

Middle valve unit

27

4

11

12

55

1

2

58a

83

PCD 12PCC

12

PX

2

27

12

19b

21

1

2

22

4

2

SAU 8

12

11

55

23

7c

BCG 8 BCF 12 PBX PBU 6 PBW 12

58b

PBZ 12 PBS

PBT 6

FBR 8 SAP SAR SAS 12

XCJ 12 BCK 12

49

12

4

1

2

7d

3

79

BYC 6

32

6 B

BC 12

Y B

7d

32

12

1

PBV 12

8

6 6

BYD 8

BCL 12

B3

BK

8

BAG

A3

12

PCF

B4

12

A2

PO

6

PCB

B6

12

PA 12

A1

8

PC

A5

PK

6

A4

FBS

8

B5

SK

6

A6

SX

12

B2

12

SC

B1

4

27

55

2

BL 8

PF 12

51

1

19

51

2

7b

32

18

PD 12

55

4

27

5

6

A

34

2

1

5

6

B

34

2

1

65

SC SX

25

A

2

6

4

1

5

3

B

2

6

4

1

5

3

1 710 109

©

Scania CV AB 2001, Sweden

102 019

The compressed air diagram consists of a skeleton diagram with symbols for the various components. It shows only how the various components are connected to one another, not where the components are located or how the compressed air lines are routed in the chassis. Pipe connections and joints are not displayed in the diagram either.

Beside each symbol is a designation, which also can be found in the list of components in this booklet. If several components have the same function, they have the same symbol but different designations.

Example

The task of a safety valve is always to open if the pressure in a circuit becomes too high. For this reason, the symbol for safety valve in the diagram is always the same. However, a valve that opens at 14.3 bar has number 13, while one that opens at 19 bar is designated as 35 (see figure).

13

Safety valve

14,3 bar

35

Safety valve 19 bar

©

4

Scania CV AB 2001, Sweden

10:00-01

In certain cases, components are differentiated

0

65

0

104723

0

by placing a letter after the number, depending on what they are used for.

Example

7c is the designation for the front circuit air tank and 7d is the designation for the rear circuit air tank (see figure).

Next to each line on the diagram is a marking in the form of two or three letters, as well as information on the diameter of the line. The line marking indicates which circuit the line belongs to, where it originates and where it runs to. The marking can also be found on the line in the vehicle.

7c

Key to compressed air diagram

7d

1

2

1

Example

The designation MADØ16 indicates a line belonging to the supply circuit running from the compressor to the cooling coil. This has a diameter of 16 mm. These markings are explained in more detail in booklet 10:02-08, Marking of compressed air lines and connections.

Optional equipment is drawn in a box with broken lines on the diagrams.

Components that constitute a single unit are drawn in a dashed and dotted frame.

MAD

16

4 724 1

10:00-01

4 727 1

©

Scania CV AB 2001, Sweden

5

0

30

Key to compressed air diagram

The air connections indicated on the symbols are marked with a number describing what each connection is intended for. The designation for Intake is normally 1. If there are two intakes, they are designated 11 and 12. Outlet is normally designated 2; if there are several they receive the numbers 21, 22, 23 etc. Number 3 is a vent and 4 a connection for control air.

4

22

1

21

3

10_2679

Air dryer

1 Intake

21 Outlet to four-circuit protection valve

22 Outlet to regeneration air tank

Electrical cable

The symbol shows that the component has an electrical function.

3 Vent port

4 Control air to compressor.

4 7 1

©

6

Scania CV AB 2001, Sweden

10:00-01

9

0

653

0

3

List of components

Compressed air lines

Designation Symbol Function

Supply pipe Under normal operating conditions, conveys full supply pressure. The pipe

104 728

can be made of plastic or steel.§

©

Scania CV AB 2001, Sweden

Control pipe Under normal operating conditions, conveys a variable control pressure. The

4 72

pipe can be made of plastic or steel.

Flexible pipe The pipe consists of a rubber hose. A coiled hose is used for the trailer

connection.

2

1

Cooling coil The cooling coil consists of a steel pipe wound in a spiral. It is located after

the compressor and its function is to cool the compressed air.

10_2654

Joined pipes

1

4 7 1

Intersecting pipes

104 732

List of components

7

8

0

656

0

65

List of components

Components

No. Designation Symbol Function Illustration

©

Scania CV AB 2001, Sweden

3 Compressor

4

7

Brake chamber The brake chamber applies the force

Brake system air tank

• 7b parking

• 7c front circuit

• 7d rear circuit

0

The compressor compresses air for various compressed air systems.

2

4

• 0 Intake

• 2 Outlet

10 2655

• 4 control air to the compressor relief valve.

10_2688

of the compressed air to the service brake.

11

2

1

10_2689

The air tank holds a supply of compressed air for the various

7

compressed air circuits.

2

1

105938

10:00-01

• 7k air dryer

Scania Brake Service Manual

10:00-01

Brake Diagram Manual

Contents

Introduction

Key to compressed air diagram

List of components