Branson F42r - Page 307

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42hW-201601
CHAPTER 6 HYDRAULIC SYSTEM
6
3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
LOWERING
▶
Oil in the hydraulic pump opens the unload valve and enters the tank as in the neutral state. As oil in the
hydraulic cylinder moves the spool, the mechanical valve, which is directly connected to the main spool with
the pin, is opened to return the oil back to the tank.
4
b
7
3
5
6
a
1
2
⫰ㆣ⪣#⫝̸ᜤ
⥯⫇⪣#㪛᳏
Q25W626A
(1) Safety valve
(2) Slow return valve
(3) Load check valve
(4) Mechanical valve
(5) Main spool
(6) Unload valve
(7) Oil tank
Operation
Oilow