DAF CF65, CF75, CF85 Series . Manual — part 870

©

200423

2-1

Braking performance and brake equalisation

TECHNICAL DATA

ΧΦ65/75/85 series

6

0

2. BRAKING PERFORMANCE AND BRAKE EQUALISATION

2.1 GENERAL

EBS tyre class
The tyre sizes are classified into tyre classes.
This tyre class information is necessary
to be able to assess the brake presentation,
by measurements of brake force.
This tyre class information is also necessary
for the EBS system to be able to evaluate
whether the electric EBS unit is programmed
when the tyre size is changed..

Tyre size change in EBS system

If the tyre size is changed in an EBS system and
the tyre size of the front and rear axle no longer
fall in the same tyre class, the changed tyre sizes
must be programmed into the electronic EBS
unit.

Tyre class

Tyre size

Class 0

215/75 R 17.5

235/75 R 17.5

Class 1

295/60 R 22.5

255/70 R 22.5

315/60 R 22.5

275/70 R 22.5

Class 2

305/70 R 22.5

315/70 R 22.5

385/55 R 22.5

295/80 R 22.5

11 R 22.5

Class 3

385/65 R 22.5

315/80 R 22.5

11.00 R 20

12 R 22.5

12.00 R 20

13 R 22.5

TECHNICAL DATA

2-2

©

200423

Braking performance and brake equalisation

0

ΧΦ65/75/85 series

6

Tyre size change in EBS 2 system

If the tyre size is changed in an EBS 2 system and
the tyre size of the front and rear axle no longer
fall in the same tyre class, it is not necessary to
program the electronic ESB 2 unit because the
electronic ESB 2 unit will automatically recognise
this change in tyre size.

OVERVIEW OF BRAKING FORCES OF
EBS SYSTEM
This overview lists the braking forces graphs
based on tyre size. These braking force graphs
apply to the prime mover with EBS; these braking
force graphs can be used to check the braking
performance of an EBS prime mover.

R600879

295/60R22,5

P (bar)

F (N)

1

2

3

6

5

4

7

8

24"

27"-165

3000

2

2,5

3

3,5

4

4,5

4000

5000

6000

7000

8000

9000

10000

11000

12000

13000

14000

15000

16000

17000

18000

19000

20000

21000

22000

23000

24000

25000

26000

27000

Graph explanation
1 Brake force per wheel (N)
2 Tyre size
3 Type of brake cylinder + brake lever length

(if applicable)

4 Brake drum design
5 Disc brake construction
6 Pressure in brake cylinder (P)
7 Reference line of measured braking force

per wheel; the example shows a brake drum
construction and a 27" brake cylinder with
a brake lever length of 165 mm.

8 Reference line of the measured braking force

per wheel; the example shows a disk brake
construction and a 24" brake cylinder.

©

200423

2-3

Braking performance and brake equalisation

TECHNICAL DATA

ΧΦ65/75/85 series

6

0

Braking force graphs

R600865

2

2,5

3

3,5

4

4,5

235/75R17,5

P (bar)

6000

5500

5000

4500

4000

3500

3000

2500

2000

F (N)

9"-125

TECHNICAL DATA

2-4

©

200423

Braking performance and brake equalisation

0

ΧΦ65/75/85 series

6

R600866

3000

2

2,5

3

3,5

4

4,5

4000

5000

6000

7000

8000

9000

10000

11000

12000

13000

14000

15000

16000

17000

18000

19000

20000

21000

22000

23000

24000

25000

26000

27000

295/60R22,5

P (bar)

F (N)

12"

14"

16"

22"

24"

27"-165

24"-165