Dynapac F1000W T4f, Operation & Maintenance Manual

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F 6.0 3
1.2 Hydraulic System
A paving machine has many components and implements that are controlled by a hy-
draulic system, either directly or indirectly. Before working on or inspecting any part of a paving machine,
it is important that the individual knows how the components move and are controlled by the hydraulic
system components including the respective control circuits.
Before working on or inspecting any component, it must be physically constrained
from any movement that could cause injury to the worker. The worker must be alert to not placing any
part of his/her body where movement of a component could cause injury, unless that component is phys-
ically contrained from movement, if the hydraulic system fails, is disconnected, or is asignaled to cause
movement.
It must also be recognized that there are occasions where component and or vehicle
movement may react to the release of potential energy. Where applicable it must be
confirmed that all measures are employed to ensure that any and all sources of po-
tential energy are released and/ or physically restrained.
All tramming, hopper and conveyor functions and augers are hydraulically powered.
The hydraulic system consists of a 50 gallon (189.21 liter) hydraulic reservoir with a
10 micron filtration system. The propel pumps, conveyor and auger pump, generator
pump and screed functions are driven by the pump drive gear box which is mounted
directly to the engine. The hydraulic system includes various motors, cylinders,
valves, filters and hose piping. A hydraulic oil cooler assures optimum oil tempera-
tures to maximize system efficiency and component life.