Branson F36r - Page 322

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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ow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orice,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