Branson F36r - Main Relief Valve

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42hW-201601
CHAPTER 6 HYDRAULIC SYSTEM
6
3015R(h)/3515R(h)/4015R(h)/F36R(h)/F42R(h) TRACTOR
K25W664A
4.10.8 MAIN RELIEF VALVE
The setting pressure of the main relief valve is 380 kgf/cm2 (37.2 MPa) to protect the internal circuit in case of
HST overload.
When the main relief valve is activated during forward or reverse driving, oil in the high-pressure side circuit is
delivered to the low-pressure side circuit to prevent damage of the internal circuit due to load.
On the other hand, oil supplied by the charge pump is sent to the low-pressure circuit through the check valve
on the neutral valve side.
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A42W617B
High pressure line
Main
relief
valve
Low pressure line
HST
Pump
Check
valve
Charge relief valve
HST
Motor
Check
valve
(Forward)
(Reverse)