Hydraulics - Strong GR4 Procedures Manual

Hydraulic System
The hydraulic system consists of the following components:
Refer to drawing #86000231.
WARNING:
The hydraulic pump is driven from the crankshaft of engine and is operating at all times the engine is
running. Whenever the machine is not in use, or when working on any part, stop the engine and remove
the red ignition key to eliminate any danger of mixer being started, or skip bucket being lifted. Prior to
starting engine, check to see that all control valves are in a neutral or off position. Failure to do so could
cause someone working on, or around machine, to be trapped by a moving part and injured seriously.
Located on the operator's platform/panel, are the control valves. To operate operator should become
familiar with operation of these valves prior to starting the operation of these valves prior to starting the
operation, so he can start and stop without hesitation.
The skip bucket is actuated by two control valves on the operator's panel. One valve raises and lowers
the bucket, and one controls the tilt of the bucket to dump material into the mixer. These two valves
control the flow of oil into and out of hydraulic cylinders.
Optionally, on the rear of the machine on the operator's side is a control valve to direct the flow of oil to a
hydraulic motor which can start, stop and reverse the hose reels. To unreel the hose the valve is lifted
"up", to reel hoses in, the valve is depressed "down".
Also in the system are pressure relief valves. These control the hydraulic pressure that can be exerted to
the various components and thus the force. These have been reset at the factory and should not be
adjusted without consulting Strong Mfg. Co., or a qualified hydraulic mechanic. Further discussion of the
hydraulic system and components to follow.
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