6
-
44
42hw-201601
Chapter 6 hydrauliC system
3015r(h)/3515r(h)/4015r(h)/F36r(h)/F42r(h) traCtOr
When operating the forward/reverse pedal for forward or reverse driving, the angle of the swash plate is
increased so oil flow toward the pump is also increased. As a result, hydraulic pressure rises gradually and
eventually exceeds the setting pressure of the return spring of the neutral valve. Then, the spool of the neutral
valve is moved to close the orifice, leading oil to the motor through the internal circuit.
FOrward/reverse driviNG
+⭏ⴏ,
Sj5#便
+㨏ⴏ,
W
E
Sj4#俀
Sj5#便
Sj4#俀
a42W616B
HST
Motor
(Forward)
(Reverse)
HST
Pump
Neutral
valve
spool
Neutral
valve
spool
Содержание 3015h
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