DAF CF65, CF75, CF85 Series . Manual — part 891
6
CF65/75/85 series
General
OPERATION OF BRAKE COMPONENTS
1-5
Legend
1
Brake saddle
2
Brake saddle carrier
3
Rubber bearing bush
4
Socket head screw
5
Guide sleeve
6
Cap
6a
Adapter
7
Copper bearing bush
8
Guide sleeve
10
Protective cover
11
Socket head screw
14
Bellows
15
Washer
16
Bearing bushes
17
Brake pad
18
Attachment bracket
19
Lock washer
20
Pin
21
Retainer clip
22
Thrust pieces with bellows
23
Sealing rings
4
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OPERATION OF BRAKE COMPONENTS
General
CF65/75/85 series
1-6
4
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CF65/75/85 series
Description of components
OPERATION OF BRAKE COMPONENTS
2-1
2. DESCRIPTION OF COMPONENTS
2.1 COMPRESSOR
CF65 series
The compressor is a single-cylinder design of
225 cm
3
with a water-cooled cylinder head. The
compressor is mounted on the left side of the
engine against the flywheel housing.
The compressor is driven via a gear wheel from
the camshaft gear on the flywheel side of the
engine.
CF75/85 series
The compressor is a two-cylinder design of
440 cm
3
with a water-cooled cylinder head. The
compressor is mounted on the right side of the
engine against the timing gear case.
The compressor is driven by the camshaft gear
via a gear wheel.
The compressor has a so-called energy-saving
function.
When the air-pressure system has reached the
set pressure, the pressure regulator in the air
dryer will send a pressure signal back to the
compressor head via port 23.
In the compressor head, a plunger operates two
valves which connect the inlet and exhaust
valves inside the compressor head.
The compressed air is then constantly pumped
internally from one cylinder to the other.
This energy-saving function has a positive effect
on the engine efficiency.
If the pressure regulator switches off to fill up
the air-pressure system, the plunger will move
the two valves into their initial position, making it
possible for the compressor to supply pressure
again.
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OPERATION OF BRAKE COMPONENTS
Description of components
CF65/75/85 series
2-2
2.2 SAFETY VALVE
Purpose
The purpose of the safety valve is to limit the
pressure build-up to a given value.
Operation
The compressor air enters at L and arrives at
spring-loaded ball 1. When the pressure
exceeds the pre-set value, the ball will be lifted
from its seat. The excess air is vented to the
atmosphere via bores E.
When the pressure drops below the pre-set
value, the ball will close again.
R600050
2
E
L
1
4
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