Iveco EuroCargo (12 to 26 t). Manual — part 152
1. Controlled pressure valve — 2. Front axle level sensor — 3. Front air spring — 4. Electro-pneumatic distributor —
5. Rear air spring — 6. Check valve — 7. Rear axle electro-pneumatic distributor — 8. Reservoir — 9. Pressure test point —
10. Rear axle level sensor
78951
Figure 15
E
URO
C
ARGO
T
ECTOR
12-26 t
60
FRONT AND REAR PNEUMATIC SUSPENSIONS
Base - February 2003
E
URO
C
ARGO
T
ECTOR
12-26 t
FRONT AND REAR PNEUMATIC SUSPENSIONS
61
Base - February 2003
DESCRIPTION
Limited return controlled pressure valve
- Type: MARELLI - WABCO 434 100 232 0 - KNORR DR 4248
Opening pressure
8.5 bar
Air reservoir
Front suspension
Rear suspension
15 litres
15 litres
Level sensor
- Type: WABCO 441 050 012 0
Power voltage
Current intake
Lever working range
Pulse 8
÷ 16V
Max 90 mA
Max 100
°
Electro-pneumatic distributor
- Type: WABCO 472 880 001 0 (for P models, on rear axle for FP models)
WABCO 472 880 020 0 (on front axle for FP models)
Working temperature range
Working pressure range (input)
Maximum dynamic pressure (output control)
Power voltage
- 40
°C ÷ + 80 °C
5
÷ 13 bar
20 bar
24 V
Check valve
- Type: WABCO WESTINGHOUSE 434 014 000 0
Working pressure range
Working temperature range
Max 20 bar
- 40
°C ÷ + 80 °C
Pressure test point
- Type: RAUFOSS 6237776 - SIRT VMF 1615 - WABCO 463.703.114.0
Working temperature range
- 40
°C ÷ + 80 °C
Electronic control unit
- Type: WABCO
Power voltage
Working temperature range
18
÷ 32 V
- 40
÷ 70 °C
Manometric switch for low air pressure
- Type: TDS F13016
Working voltage
Permitted electric load
Maximum operating pressure
12/24 V
0.001 to 1 A
12 bar
Inefficient air compressor operation.
Overhaul or replace the air compressor.
Inefficient pressure regulator built into A.P.U.
Replace A.P.U.
Inefficient controlled pressure valve operation.
Replace the controlled pressure valve.
1
LOW OR IRREGULAR PNEUMATIC
SYSTEM RECHARGING
Leaking or broken pneumatic system pipes.
Close or replace loose or damaged fittings.
Replace broken or damaged tubes.
YES
NO
YES
NO
YES
NO
YES
Main pneumatic suspension operating problems:
1
-
Low or irregular pneumatic system recharging
2
-
Irregular vehicle trim
3
-
Chassis out of trim warning light on at speeds faster
than 20 km/h
Wrong pneumatic and/or electrical connections.
2
IRREGULAR VEHICLE TRIM
Leaking or broken pneumatic system pipes.
Close or replace loose or damaged fittings. Replace
broken or damaged tubes.
YES
NO
YES
Locate wrong connections and restore.
(continued)
E
URO
C
ARGO
T
ECTOR
12-26 t
62
FRONT AND REAR PNEUMATIC SUSPENSIONS
Base - February 2003
Inefficient level sensor operation.
Adjust linkages and replace level sensor, if required.
Replace the ECU.
Inefficient electro-pneumatic distributor operation.
Inefficient ECU operation.
Replace the electro-pneumatic distributor.
NO
YES
NO
YES
YES
3
Leaking or broken pneumatic system pipes.
Close or replace loose or damaged fittings. Replace
broken or damaged tubes.
Damaged electrical connections.
Restore the electrical wiring.
NO
YES
YES
Replace the remote control.
NO
YES
CHASSIS OUT OF TRIM WARNING
LIGHT ON AT SPEEDS FASTER THAN
20 KM/H
Inefficient remote control operation.
Replace the ECU.
Inefficient sensor operation.
Inefficient ECU operation.
Adjust linkages and replace level sensor, if required.
NO
NO
YES
YES
E
URO
C
ARGO
T
ECTOR
12-26 t
FRONT AND REAR PNEUMATIC SUSPENSIONS
63
Base - February 2003
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