Hydraulic System - General - Mec 4069RT Service And Parts Manual

H S
YDRAULIC
The hydraulic integrated circuit, generally known as the valve-type manifold system is
designed to control all or part of machine functions by integrating various hydraulic
cartridge valves into a manifold to provide directional, pressure, flow, and load control.
The hydraulic system is a feedback, load-sensing type. Generally in this type of system,
hydraulic fluid is provided by a variable displacement, pressure compensated, axial
piston type pump which is directly coupled to the engine. As the engine turns, the
hydraulic pump drains fluid from the reservoir and pumps this fluid to the Functions
Manifold.
If no function is in use, the pump remains on standby and no fluid is pumped to the
manifold. Each function has a maximum pressure control limit set by pressure relief
valve.
ART_4481
– G
YSTEM ENERAL
Functions
Manifold
Hydraulic
Reservoir
"4069RT" Service and Parts Manual
H
Rear Wheel
Motor/Brake
Steer
Outrigger
Cylinder
Cylinder x4
S – G
Y D R A U L I C Y S T E M
Figure 1-1: Hydraulic System
Upper Lift
Cylinder
Lower Lift
Cylinder
Front Wheel
Motor/ Brake
Hydraulic
Pump
March 2014
E N E R A L
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