Farmer 400
Fav 700
Fav 900
Transmission / enhanced actuation system valves
Operation of turboclutch pressure-relief valve (4V4)
A
General
Fav 900 chassis number 23/3001 and up
29.11.2000
1600
000001
A
a
1/2
Capitel
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Operation of turboclutch pressure-relief valve (4V4)
Text-module
Turboclutch pressure-relief valve 4V4 / Y004
Turboclutch valve (4V4) regulates build-up of high pressure PH such that it is proportional to engine
speed.
This enables turboclutch operation.
Turboclutch valve is mounted in valve unit which also contains connection between high-pressure
circuit PH and tank. If this connection is not closed, high pressure cannot be generated, and tractor
does not reach maximum tractive power.
High-pressure circuit PH to tank is closed by turboclutch valve (4V4).
PM-Picturemodule
Text-module
Turboclutch valve is actuated from electronic box. Electrical power consumption depends on engine
speed and is as follows:
High-pressure build-up therefore depends on electrical supply and tightness of turboclutch valve
against leaks.
PMTAB_Picture
Engine speed
Power consumption
Max. PH
Note
800 rpm
0 A
0 bar
Transmission neutral
800 rpm
approx. 0.46 A
78 bar
Transmission actuated
1200 rpm
1.23 A
105 bar
1400 rpm onwards
1.71 A
500 bar
