General; Main Pressure; Cooler - Husqvarna DXR140 Operator's Manual

General

The task of the hydraulic system is to operate the
machine's functions by means of hydraulic pressure and
flow. The system consists of hydraulic pump, tank, cooler,
hydraulic motor, hydraulic cylinders, filters and valves of
various kinds. Hoses or pipes connect the components
with each other.
Valves are used to control the hydraulic system's
pressure, volume rate of flow and direction. Pressure
control valves limit or reduce the pressure to the value
required. Volume control valves affect the hydraulic oil's
flow and thereby the speed of the functions. Direction
control valves direct the hydraulic oil to the machine's
different functions.
The hydraulic pump is of the variable displacement type
and delivers a flow of 0-52 l/min (0-14 gal/min).

Main pressure

The hydraulic system has different pressure levels.
• Hydraulic hammer 160 Bar (15 kW)
• Standard pressure is 200 Bar
• Increased main pressure is 250 Bar
Increased main pressure is used when the outriggers are
extended and when running arm system inward in parallel
motion.

Cooler

The cooler has an integrated bypass valve that protects
against overpressure in conjunction with, forÊexample,
cold start.
8 – English
HYDRAULIC SYSTEM