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C 4.74
Operating instructions
104 149 443
Operating the implements
6
5
Bild_C185
C4.74 Variable-displacement pump
0
20
30
40
45
50
55
60
65
70
75
80
85
90
95
100
105
1100
1200
1300
1400
1500
1600
1700
1800
1900
2000
2100
2200
2300
2400
2500
2600
2650
Engine RPM [1/min]
Displacement [
litres
]
50 litres
60 litres
70 litres
80 litres
90 litres
100 litre
s
Bild_C278_GB
NOTE
The implement variable-displacement pump
attempts to maintain the oil flow specified by
the coded plug and potentiometer, even when
the engine speed is reduced.
The oil flow is only reduced at lower rpm when
the maximum swash angle of the pump is
reached (see diagram).
ATTENTION
If the implement is not in use, turn the pump
off with the safety switch to prevent any un-
necessary overheating of the hydraulic oil.
Turning off the implement variable-displacement
pump
- Turn the safety switch (6) off. The indicator in the
switch extinguishes.
NOTE
If you shut down the engine without first turn-
ing off the implement variable-displacement
pump, the pump can not immediately be
turned on again on for safety reasons.
Before a new start you must first either:
- set the rotary knob to 0, or
- turn the safety switch off and on again once,