Holder C-Trac 4.74 - Manual (Page 105)

C 4.74
Operating instructions
104 149 443
Operating the implements
6 5
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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 litres
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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,