
6
-16
Apr. 2007
DSC48
2.1 OVERVIEW
417W620A
417W621A
(1) Oil
cooler
(2) Oil
fi
lter
(3) HST (Hydrostatic transmission)
(4) Pump
shaft
(5) Shift lever assembly
(6) Motor
shaft
(7) Oil
fi
lter
417W622A
The HST (Hydrostatic transmission) consists of the vari-
able capacity pump,
fi
xed capacity motor, oil
fi
lter, charge
pump, and check & high pressure relief valve.
2. HST (HYDROSTATIC TRANSMISSION)
However, the HST needs very clean oil. Therefore, unlike
other hydraulic systems, it has its own oil
fi
lter and oil
fi
lter
cartridge (10
μ
) for the inlets of the charge pump and vari-
able capacity pump. To prevent the rise of the oil tempera-
ture, the oil cooler is also installed to the drain line. The
power is transferred to the 16T gear in the transmission
case. The rotating direction and speed of the motor shaft
change according to the movement of the HST’s swash
plate through the HST rod as the main shift lever moves.
(8) Oil
tank
(9) Transmission
case
(10) HST pulley
(11) Check & high pressure relief valve
(for forward driving)
(12) Pump shaft (input)
(13) Motor shaft (output)
(14) Swash plate shaft
(15) Check & high pressure relief valve
(for reverse driving)
(16) Check & high pressure relief valve
(for forward driving)
(17) Charge pump
Содержание DSC48
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Страница 251: ...Apr 2007 7 11 DSC48 2 3 WIRING DIAGRAM 417W717A...
Страница 262: ...7 22 Apr 2007 DSC48 4 3 WIRING DIAGRAM 417W723A...
Страница 281: ...417W758B B ON GND B GND 7 2 CIRCUIT DIAGRAM Apr 2007 7 41 DSC48...
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Страница 285: ...DSC48 INDEX...