Branson F42r - Page 306

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CHAPTER 6 HYDRAULIC SYSTEM 3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
LIFTING (LOW-SPEED LIFTING)
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As the hydraulic lift is lifted, the feedback link is moved to push the main spool closer to the neutral position.
Then,themechanicalvalveopenslightlyandtheoilowofmainspooltoreturnoilbacktothetank.Butthe
majority of oil is led into the cylinder to reduce shock occurred by lifting operation.
(1) Safety valve
(2) Slow return valve
(3) Load check valve
(4) Mechanical valve
(5) Main spool
(6) Unload valve
(7) Oil tank
4
5
b
7
3
6
a
1
2
⫰ㆣ⪣#⫝̸ᜤ
⥯⫇⪣#㪛᳏
Q25W625A
Operation
Oilow