Farmer 400
Fav 700
Fav 900
Power lift / Electrohydraulic control EPC
Rear power lift - functional description
A
General
Fav 900 chassis number 23/3001 and up
29.11.2000
8610
000001
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a
1/8
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Rear power lift - functional description
Text-module
Comparison with Fav 500, Xylon, Fav 800 etc. (in brief):
Unchanged:
Bullet-List
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Operating principle
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EPC-DA switchover via twin-block ball valve
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230 bar pressure-relief valve in EPC valve
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Possible danger when switching from EPC to DA as a result of pressure equalisation between
different consumers (gravity-loaded)
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Safety measures
Text-module
New:
Bullet-List
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Location of EPC valve between first and second control valves
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EPC valve with two separate main pistons
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"Lower" valve with integral oil-leakage shutoff valve
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No specific floating position required in valve
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Automatic activation of shock load damping system with option of setting closing speed on terminal
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Only the "actual" signal lines are included in the relevant electrical circuit diagram; the bus
messages to the terminal, to the ECU A002, to the electrohydraulic control valve and to the terminal
A008 cannot be seen in the circuit diagram.
Text-module
Text-module
Following movements are possible for rear power lift:
1. "EPC lift"
2. "EPC lower / regulate"
3. "EPC transport"
4. "DA lift"
5. "DA lower"
Text-module
Text-module
Other operational statuses are:
6. Floating position
7. Shock load damping
8. Electrohydraulic remote control
Text-module
Text-module
Safety precautions
Bullet-List
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In all modes EPC box is only activated at minimum engine speed of 400 rpm, i.e. it must always be
guaranteed that even automatically induced movement - e.g. lowering implement - can quickly be
corrected by driver with active LS pump (speed figure is delivered to EPC box via K-bus).
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Switch S048 on EPC-DA multiway valve prevents possibility of dual operation.
Text-module
1. "EPC lift"
The "Lift" command can be triggered by
Bullet-List
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rapid lift control on control console with "Lift" command, or
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depth setting (= setpoint potentiometer), or
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"END" rocker switch on joystick, when in automatic mode, or
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automatic correction with active shock load damping, or
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external buttons (S027 and S029) at cab on right and left
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Any external commands immediately lock all other EPC functions.
Text-module
