Safety
Series 505G2 SilentFlo™ Hydraulic Power Unit 25
Check bolt ratings and torques
To ensure a reliable product, fasteners (such as bolts and tie rods) used in MTS-manufactured
systems are torqued to specific requirements. If a fastener is loosened or the configuration of a
component within the system is modified, refer to information in this product manual to determine the
correct fastener, fastener rating, and torque. Overtorquing or undertorquing a fastener can create a
hazardous situation due to the high forces and pressures present in MTS test systems.
On rare occasions, a fastener can fail even when it is correctly installed. Failure usually occurs during
torquing, but it can occur several days later. Failure of a fastener can result in a high velocity projectile.
Therefore, it is a good practice to avoid stationing personnel in line with or below assemblies that
contain large or long fasteners.
Practice good housekeeping
Keep the floors in the work area clean. Hydraulic fluid that is spilled on any type of floor can result in a
dangerous, slippery surface. Do not leave tools, fixtures, or other items not specific to the test, lying
about on the floor, system, or decking.
Protect hoses and cables
Protect electrical cables from spilled hydraulic fluid and from excessive temperatures that can cause
the cables to harden and eventually fail. Ensure that all cables have appropriate strain relief devices
installed at the cable and near the connector plug. Do not use the connector plug as a strain relief.
Protect all system hoses and cables from sharp or abrasive objects that can cause the hose or cable to
fail. Never walk on hoses or cables or move heavy objects over them. Consider hydraulic distribution
system layout and route hoses and cables away from areas that expose them to possible damage.
Provide proper hydraulic fluid filtration
If the system is equipped with a non-MTS hydraulic power unit, ensure proper filtration to the hydraulic
distribution system and testing components. Particles present in hydraulic fluid and cause erratic or
poor system response.
Protect accumulators from moving objects
Protect accumulators with supports or guards. Do not strike accumulators with moving objects. This
could cause the accumulator(s) to separate from the manifold resulting in equipment damage and
personal injury.
Do not exceed the Maximum Supply Pressure
For hydraulic grips and fixtures. make sure that the hydraulic supply pressure is limited to the maximum
pressure defined by the grip or fixture identification (ID) tag.
Do not disable safety devices
Your system may have active or passive safety devices installed to prevent system operation if the
device indicates an unsafe condition. Do not disable such devices as it may result in unexpected
system motion.
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