MTS Series 505 SilentFlo Hydraulic Power Unit Model 505-180 - Manual (Page 41)

General Safety Practices: Hydraulic Power Units and
Model 505.60 - 505.180 SilentFlo™ HPU Safety 41
Have first aid available
Accidents can happen even when you are careful. Arrange your operator
schedules so that a properly trained person is always close by to render first aid.
In addition, ensure that local emergency contact information is posted clearly and
in sight of the system operator.
Know potential crush
and pinch points
Be aware of potential crush and pinch points on your system and keep personnel
and equipment clear of these areas.
Remember, when hydraulic power is interrupted on a servohydraulic system, it is
likely that stored accumulator pressure will persist for some time within the
system. In addition, it is likely that as stored energy dissipates, gravity will cause
portions of the system to move.
Be aware of
component movement
with hydraulics off
The actuator rod can also drift down when hydraulics are turned off hitting
anything in its path. This uncommanded movement is because of oil movement
between the pressure/return ports and oil blow by across the piston hub. Be aware
that this can happen and clear the area around the actuator rod when hydraulics
are turned off.
Know electrical
hazards
When the system electrical power is turned on, minimize the potential for
electrical shock hazards. Wear clothing and use tools that are properly insulated
for electrical work. Avoid contact with exposed wiring or switch contacts.
Whenever possible, turn off electrical power when you work on or in proximity
to any electrical system component. Observe the same precautions as those given
for any other high-voltage machinery.
Make sure that all electrical components are adequately grounded. Grounds must
remain connected and undisturbed at all times.
Keep bystanders
safely away
Keep bystanders at a safe distance from all equipment. Never allow bystanders to
touch specimens or equipment while the test is running.
Wear proper clothing
Do not wear neckties, shop aprons, loose clothing or jewelry, or long hair that
could get caught in equipment and result in an injury. Remove loose clothing or
jewelry and restrain long hair.
Remove flammable
fluids
Remove flammable fluids from their containers or from components before you
install the container or component. If desired, you can replace the flammable
fluid with a non-flammable fluid to maintain the proper proportion of weight and
balance.
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.