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Chapter 6 hydrauliC system
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3015r(h)/3515r(h)/4015r(h)/F36r(h)/F42r(h) traCtOr
4.10 hst(hydrOstatiC traNsmissiON) [hst mOdel]
4.10.1 hst passaGe COmpOsitiON
(1) PTO valve
(2) HST filter
(3) Oil cooler
(4) HST
The HST (Hydro-Static Transmission) consists of the variable capacity pump, fixed capacity motor, check valve,
high-pressure relief valve, etc. and it is installed to the transmission to supply turning force to the transmission. The
input shaft of the HST is connected to the spring damper which is installed to the flywheel of the engine with the
spline. to receive turning force from the engine. Its HST pump is driven by receiving this turning force through the
input shaft of the HST, and hydraulic oil led into the HST is sent to the hydraulic motor to supply new rotating force
to the transmission. As the HST pump can adjust hydraulic flow variably, it can adjust the speed of the HST motor
variably and the rotating direction of the motor through the internal swash plate for forward and reverse driving.
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a42W608B
Summary of Contents for 3015h
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