Basic Information
16
C2500CB-OM-EN-16
2.4 Principle of Operation
Drive is achieved by means of a hydrostatic drive pump coupled to an internal
combustion (IC) engine. The drive pump pumps hydraulic oil through hydraulic hoses
to wheels motors on which each of the three wheels are mounted. The wheel motors
turn the wheels to drive the truck. The speed of the drive is controlled by a throttle
pedal located in the operating enclosure.
Steering is achieved by means of a hydraulic gear pump coupled to an internal
combustion (IC) engine. The gear pump pumps hydraulic oil through a steering
orbital unit. When the steering wheel is turned pressurised oil is fed via the steering
orbital to hydraulic steering cylinders to steer the truck. Hydraulic valves in the
steering system allow the wheels to be aligned parallel to the truck or perpendicular
to the truck as desired.
Lift, tilt and side shift along with other optional auxiliary mast functions are achieved
by means of a hydraulic gear pump coupled to an internal combustion (IC) engine.
The gear pump pumps hydraulic oil through a block of valves. The valves are
operated by levers (or a joystick if fitted) and are used to direct the pressurised oil to
hydraulic cylinders to operate each of the mast functions.
Forward, reverse, left or right travel may be selected by a direction control lever
mounted inside the operating enclosure. Selecting a direction of travel sends
electrical signals to a set of solenoid actuated hydraulic valves. The solenoid
actuated valves direct the flow of hydraulic oil to the steering cylinders to steer the
wheels to the appropriate position to achieve the desired mode of travel. The
direction control valve directs the flow of oil out of the drive pump to achieve the
desired direction of drive.
The truck is equipped with analogue dash clusters that display information regarding
the trucks operating condition such as the engine coolant temperature, the engine oil
pressure, low fuel, steering mode etc.
A brake/inch pedal slows the truck down when partially pressed and brings the truck
to a complete stop when fully pressed and held down. The park brake is applied by a
push button located inside the operating enclosure.
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