Volvo EC60E, Operator'S Manual, Page: 14 / 342

Hydraulic system
The machine is equipped with a flow control system
with variable flow. With this system, the working
pump can deliver flow according to demand. A
variable flow from the pump allows precision work
even with high engine speed.
Track motor and gearbox
Each track is powered by an automatic two-speed
shift track motor. The track brakes are multi-disc,
spring-applied and hydraulic released. The track
motor, brake and planetary gears are well protected
within the track frame.
The track gearbox is composed of sun gear,
planetary gear, pinion gear and housing.
Swing motor
The swing motor consists of the rotary group of 9
fixed volume pistons, cylinder blocks and a shaft
with pinion gear, the parking brake group with
washer spring and piston and the control block
group with an anti-shock relief valve.
Main control valve
The control valve consists of 10 or 11 (for rotator
option) section blocks, main relief valve, port relief
valve, holding valve and so on.
Equipment
The machine can be provided with different types
of optional equipment, depending on the
requirements of different markets. Examples of
such equipment are attachment quick coupler and
hydraulic breaker.
Presentation
13