6
CF65/75/85 series
Description of components
OPERATION OF BRAKE COMPONENTS
2-3
2.3 AIR SUPPLY UNIT
Purpose
The air supply unit is a combination of an air
dryer, pressure regulator and four-circuit safety
valve and has the following functions:
-
removing water, oil and other foreign matter
from the air, even before they enter the
brake system;
-
setting the system pressure by means of a
built-in pressure regulator;
-
limiting the pressure build-up to a given
value;
-
splitting the brake system into four circuits
and, should one circuit fail, protecting the
other circuits against running empty.
R600359
Operation, air dryer
Filling the system
The air supplied by the compressor reaches the
air dryer via connection point 1/12. In the filter
element (1), the air passes through the coarse
filter (2), which sieves out the oil and dirt
particles.
In addition, the air condenses against the cool
wall of the element. Subsequently, the air flows
through filter grains (3), which extract the water
vapour from the air. The air thus dried flows via
non-return valve 4 to connection point 21.
R600457
10
9
6
7
11
5
8
b
c
a
16
12
21
1/12
23
3
4
2
1
18
17
14
13
15
19
29
21
A
4
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