Iveco Stralis AT/AD. Manual — part 194
51473
Figure 3
1. ELECTRO-HYDRAULIC PUMP - 2. LIFTING CYLINDERS
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RIGID REAR ADDED AXLE WITH HYDRAULIC LIFTING 56082/T1 (N 9171)
Base - January 2003
51474
Figure 4
1. HYDRAULIC CYLINDERS - 2. PRESSURE SWITCH (closing pressure 30 bar) - 3. PRESSURE SWITCH (opening pressure
30 bar) A. SOLENOID VALVE - B. SOLENOID VALVE - C. SAFETY VALVE (200 + 10 bar) - D. PRESSURE SWITCH
(opening pressure 175 bar) - E. CHECK VALVE - F. HYDRAULIC PUMP - G. OIL FILTER - H. OIL RESERVOIR - I. ELECTRIC
MOTOR.
RIGID REAR ADDED AXLE WITH HYDRAULIC LIFTING 56082/T1 (N 9171)
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Hydraulic system circuit diagram
Main malfunctions of the auxiliary rear axle with hydraulic
lifting:
1.
The 3rd axle fails to lift or fails to lower.
2.
No automatic lowering of 3rd axle when load exceeds
11.5 tonnes and no pull-away assist function.
YES
Insufficient fluid.
Top up.
Electro-hydraulic pump inefficient.
- Check electrical wiring to pump.
- Check connections e/k of the bulkhead connector.
- Replace electro-hydraulic pump.
Dampers or lifting cylinders inefficient.
Leaks or damaged hoses in hydraulic system.
YES
YES
1
THE 3RD AXLE FAILS TO LIFT OR
FAILS TO LOWER
NO
NO
YES
Electrical faults.
NO
NO
Replace dampers or lifting cylinders.
- Tighten loose fittings.
- Replace damaged fittings.
- Replace damaged hoses.
- Check operation of components.
- Check wiring.
- Ensure all electrical connection s are made
correctly.
YES
(continued overleaf)
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RIGID REAR ADDED AXLE WITH HYDRAULIC LIFTING 56082/T1 (N 9171)
Base - January 2003
NO AUTOMATIC LOWERING
OF 3RD AXLE WHEN LOAD EXCEEDS
11.5 TONNES AND NO
PULL-AWAY ASSIST FUNCTION
2
No tachometer consensus.
- Check the tachometer 5a fuse.
- Check the tachometer grounding point.
- Change the tachometer.
YES
NO
Malfunction of electro-hydraulic pump.
Replace electro-hydraulic pump.
RIGID REAR ADDED AXLE WITH HYDRAULIC LIFTING 56082/T1 (N 9171)
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