Iveco Stralis AT/AD. Manual — part 248
- Check the wiring
- Replace the electro-pneumatic modulator
YES
Overhaul or replace the brake cylinders.
Inefficient operation of the brake cylinders
Overhaul or replace the Duplex control valve.
Inefficient operation of the Duplex control valve
Overhaul the rear brakes.
Inefficient operation of the rear brakes
Overhaul or replace the brake linings.
Brake linings worn and/or vitrified
YES
NO
YES
NO
YES
NO
(continued)
NO
YES
- Check the electric wiring.
- Replace the ABS solenoid valve.
Inefficient operation of the ABS solenoid valve
NO
YES
Inefficient operation of the electro-pneumatic modulator
of the rear axle (vehicles with EBS)
YES
Replace the complete brake calliper.
Inefficient operation of the automatic clearance recovery
device
NO
- Check the wiring.
- Replace the Duplex Control Valve with electric
transmitter
YES
Inefficient operation of the Duplex control valve with
electric transmitter (vehicles with EBS)
NO
S
TRALIS
AT/AD
50
AIR SYSTEM - BRAKES
Base - January 2003
YES
YES
NO
Air system pipes leak or burst
Inefficient operation of the Duplex control valve
Close or replace the worn or damaged fittings. Replace
the burst or damaged pipes.
Overhaul or replace the Duplex control valve.
(continued)
YES
Overhaul or replace the brake linings.
Brake linings worn and/or vitrified
NO
NO
YES
Inefficient operation of the front brakes
Overhaul the front brakes.
YES
Overhaul ore replace the relay valve.
Inefficient operation of the relay valve
NO
NO
YES
Inefficient operation of the diaphragm brake cylinders
Overhaul or replace the diaphragm brake cylinders.
POOR OR ABNORMAL SERVICE
BRAKING OF THE FRONT AXLE
3
YES
Inefficient operation of the automatic clearance
recovery device
NO
Replace the complete brake calliper.
AIR SYSTEM - BRAKES
51
S
TRALIS
AT/AD
Overhaul or replace the A.P.U.
YES
- Check the wiring.
- Replace the Duplex Control Valve with electric
transmitter (vehicles with EBS)
- Check the wiring
- Replace the front axle relay valve
- Check the electric wiring.
- Replace the ABS solenoid valve.
YES
YES
NO
YES
YES
NO
Inefficient operation of the front axle relay valve
(vehicles with EBS)
Inefficient operation of the Duplex control valve with
electric transmitter (vehicles with EBS)
4
POOR OR ABNORMAL TRAILER
SERVICE BRAKING
Air system pipes leak or burst
Inefficient operation of the triple control servo control
valve
Close or replace the worn or damaged fittings. Replace
the burst or damaged pipes.
Overhaul or replace the triple control servo control
valve.
Inefficient operation of the ABS solenoid valve
NO
YES
Overhaul or replace the Duplex control valve.
Inefficient operation of the Duplex control valve
NO
NO
YES
Inefficient operation of the A.P.U.
(continued)
S
TRALIS
AT/AD
52
AIR SYSTEM - BRAKES
Base - January 2003
- Check the wiring
- Replace the electro-pneumatic modulator
Inefficient operation of the parking brake manual con-
trol valve (lever)
YES
NO
YES
NO
YES
YES
NO
YES
5
Inefficient operation of the trailer brakes
Overhaul the trailer brakes.
Brake linings worn and/or vitrified
Overhaul or replace the brake linings.
POOR OR NO
PARKING BRAKING
Air system pipes leak or burst
Inefficient operation of the combined brake cylinders
Close or replace the worn or damaged fittings. Replace
the burst or damaged pipes.
Overhaul or replace the combined brake cylinders.
Overhaul or replace the lever.
YES
NO
Brake linings worn and/or vitrified
Overhaul or replace the brake linings.
(continued)
NO
YES
Inefficient operation of the electro-pneumatic modu-
lator of the rear axle (vehicles with EBS)
AIR SYSTEM - BRAKES
53
S
TRALIS
AT/AD
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