20425603
5-2005/Rev 0
6-1
SECTION 6
HYDRAULIC SYSTEM
6.1 Overview
The main hydraulic power circuit supplies the intensifier assembly with the hydraulic flow
required to produce high pressure water. High pressure cutting water is generated from the oil
pressure in the hydraulic cylinder.
System components include the electric motor, hydraulic pump, 4-way directional control valve
and the hydraulic manifold. The manifold houses the high and low pressure control valves,
hydraulic gauge, solenoid valve and the main system relief valve. The system relief valve
monitors hydraulic oil pressure and provides system protection by limiting excess pressure.
6.2 Operation
The electric motor drives three pumps mounted in tandem; the main hydraulic pump, the
recirculation pump and the optional booster pump. The motor drives the variable displacement,
pressure compensated hydraulic pump by means of a flexible coupling.
Hydraulic fluid from the reservoir is drawn into the inlet, low pressure side of the hydraulic
pump. Oil delivered to the pump should be maintained at 110-115° F (43-46° C). Hydraulic
fluid then enters the bottom of the manifold through an internal anti-rotation check valve. After a
shutdown, the anti-rotation check valve prevents the pump from running backwards.
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