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Farmer 400
Fav 700
Fav 900
Transmission / enhanced actuation system valves
Checking valve unit
E
Testing
711 / 712 > 21/1001 - 714 / 716 > 21/2001; 900 > 23/3001
24.11.2000
1600
000001
E
a
1/3
Capitel
Docu-No.
Index
Date
Version
Page
Checking valve unit
Single e-box
Text-module
If max. high pressure is not reached during high-pressure measurement, cause may lie in Vario
transmission unit or outside this in valve unit. In order to decide whether Vario transmission unit has to
be removed, valve unit (transmission control unit) should first be checked for tightness against leaks.
Generation of high pressure in valve unit depends on tightness against leaks of
Bullet-List
●
turboclutch [ 4V4 / Y 004 ]
●
clutch [ 4V5 ]
pressure-relief valves.
Text-module
Turboclutch valve is closed under following circumstances, and therefore high pressure cannot be
generated:
Bullet-List
●
Engine speed greater than 1400 rpm (energised to maximum)
●
Emergency mode actuated.
●
Valve mechanically locked (tighten hexagon socket screw or operate actuating lever)
Text-module
Clutch valve is closed (high pressure can be generated) when clutch pedal is not actuated .
PM-Picturemodule
Text-module
Tightness of both pressure-relief valves (4V4 / 4V5) against leaks can be checked at connection T .
PM-Picturemodule
Text-module
PMTAB_Picture
PMTAB_Picture