Strong GR4 Procedures Manual page 8

dreadfully, the potential of material blowing out into the eye causing injury or even loss of sight.
7. It is possible for excessive hydraulic pressure to develop if hydraulic line is blocked. Extreme
care should be exercised while working on this hydraulic system – damage to equipment and/or
injury may result from misuse or careless operation of these components. Never loosely block off
a hydraulic line. If a pipe plug or cap is used when testing hydraulic components, be sure it is
tight – it can become a deadly projectile.
8. Each hydraulic system is provided with a pre-set relief valve. This valve is pre-set at pressure
lower than the maximum the various hydraulic components are rated. ONLY Strong
Manufacturing personnel or persons with experience in hydraulics should adjust the relief valve.
If the relief valve is adjusted to pressures exceeding the rating of the components used, the
components can rupture or explode in a high-pressure situation. A motor, or hose exposed to
greater pressures than it is rated for, can become a deadly projectile, resulting in broken bones,
lacerations and even death.
9. Properly operating hydraulic pressure gauges should be on the machine at all times. These
gauges provide an instantaneous read-out of hydraulic pressures required to power the system.
Relief valves can malfunction. If hydraulic pressures ever exceed factory settings – the machine
should be stopped immediately. Get relief valves replaced or properly adjusted only be Strong
Manufacturing personnel or by people experienced in hydraulics. Without proper operating
pressure gauges, malfunctioning relief valves cannot be determined; therefore, exposing
personnel to potential injury caused by a component rupturing or exploding.
10. Be sure all machinery guards are in place. The guards provided with this machine consist of the
following:
•
Mixer inlet guard
•
Mixer drive motor guard
•
Mixer splash guard
•
Wet materials hopper guard
•
Engine side panels
As a general rule, the machine should be kept as clean as possible. Material should not be
allowed to build up on warning signs, instructions, gauges, etc. It is also possible that material
buildup could interfere with control operation thus presenting hazards of a general nature.
Caution: Do not stand under or near the skip bucket at any time. Possible injuries such as cuts,
bruises, broken limbs, or death could occur, if struck by the skip bucket while it is being raised
and lowered.
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