wsm Kubota L4100, Workshop Manual

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HYDRAULIC SYSTEM L4100, WSM
8-M4
(EU)
4. HYDRAULIC CIRCUIT FOR THREE POINT
HYDRAULIC SYSTEM
[1] HYDRAULIC OIL FLOW
1. When the engine (3) is started, the hydraulic pump (4) is rotated to draw oil from the transmission case (1) through
the section pipe. Supplied oil is filtered by hydraulic oil filter cartridge (2).
2. Filtered oil is force out by the hydraulic pump to the front hydraulic block (6). When a front end loaders is equipped
with the tractor, oil pressure is taken from the front hydraulic block (6), and the return oil from the front end loader
flows back to this front hydraulic block (6), then into the position control valve (7) through the delivery pipe.
3. The position control valve (7) switches the oil to the hydraulic (9) for the three-point hydraulic system or return to
the oil tank (Transmission case) (1).
• The hydraulic system has a relief valve (5) which restricts the maximum pressure in the circuit and a cylinder
safety valve which relieves shock pressure in the hydraulic cylinder.
• When hydraulic power is taken out to use a hydraulically-operated implement, implement cylinders can be
actuated by operating the double-acting auxiliary control valve (11).
9Y1210278HYM0004US0
(1) Oil Tank (Transmission
Case)
(2) Hydraulic Oil Filter Cartridge
(3) Engine
(4) Three Point System
Hydraulic Pump
(5) Relief Valve
(6) Front Hydraulic Block
(7) Position Control Valve
(8) Lowering Speed Adjusting
Valve
(9) Hydraulic Cylinder
(10) Hydraulic Cylinder Block
(11) Auxiliary Control Valve
(12) Cylinder Safety Valve
A: To Power Steering
Controller and PTO Clutch
Valve
KiSC issued 08, 2012 A