DAF CF75 Series - AS Tronic

3
CF65/75/85 series AS Tronic
DIAGNOSTICS
9-1
9. AS TRONIC
9.1 FAULT-FINDING TABLE
UsingDAVIE,theairpressurecanbeexamined
after the pressure regulator. The air pressure
before the pressure regulator can be measured
using a pressure gauge on the screw valve of
the AS Tronic air reservoir.
SYMPTOM: AIR SUPPLY PRESSURE TOO LOW
Possible cause Remedy
Air supply pressure too low due to:
- Air leakage in air pipe from air supply unit to
modulator pressure regulator
- Pressure regulator factory setting disrupted
Check the following air connections:
- Non-return valve at output 26 of the air
supply unit
- Pressure relief valve on transverse support in
front of left front wheel
- Both connections and valve on air reservoir
of AS Tronic
- Air connection of T-piece on modulator
pressure regulator
- Sealing ring between pressure regulator and
modulator upper cover
- Pressure regulator set screw seal (underside
of pressure regulator under plastic cover)
- Air lead-through sealing ring between
modulator upper and lower covers
- Air connection on clutch unit
- Bleed screw, clutch unit
Defective or incorrectly functioning pressure
regulator on modulator
- Replace pressure regulator
ᓻ 200337
1
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