SHOP MANUAL
HYDRAULIC
Ch 5 page 10 Ch 5 page 11
HYDRAULIC
Pos. Description Function
1 Solenoid valve Parking brake release valve
1, 11, 21, 30,
33
Coil: 24 V, 14 W
3 Prssure relief valve Pump pressure spike clipper valve
4, 5, 6, 7 Check valve Brake accumulator charge and isolated
function
8 Pressure reducing valve Brake charge pressure control valve
11 Solenoid valve Brake charge deactivation valve
13 Check valve Steering system fed check valve
14 Logic element Steering priority valve
16 Shuttle valve Load signal shuttle valve
17 Solenoid valve Fan deactivation valve
17, 24 Coil: 24 V, 28 W
18, 32 Shuttle valve Load signal shuttle valve
19 Pressure relief valve Steering load signal pressure limiter
20 Orifice check valve Pump load signal damping restrictor
21 Solenoid valve Differential lock activation valve
22 Pressure reducing valve Differential lock pressure control valve
23 Pressure relief valve Fan load signal pressure limiter
24 Proportional pressure relief valve Fan load signal pressure control valve
25 Pressure reducing valve Pilot pressure supply valve
27 Flow control valve Fan speed control circuit flow regualtor
28 Logic element Fan speed control valve
29, 34 Proportional pressure reducing valve Bin function pilot pressure control
valve
30 Solenoid valve Float function activation valve
31 Check valve Engine exhaust brake maximum pres-
sure limiter
33 Proportional pressure reducing valve Engine exhaust brake pressure control
valve
Main Valve - List Of Components
Hydraulic System pressure
Brake system pressure:
• Front brake circuit 59±2 bar
• Rear brake circuit 2.4 bar less pressure than front
Pressure monitoring sensors:
• Main pump Sensor monitors exact value
• Emergency steering pump 2.2 / 2.5 bar (vehicle moving)
• Brakes accumulators 135 / 120 bar (alarm: 120 and reset at 135)
• Park brake monitoring 10 / 50 bar
• Retarder brake monitoring CanBus message from transmission
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