Enerpac Products UNI-LIFT M - Manual (Page 5)

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WARNING: Fabrication and installation of shaft and
coupling guards is the customer's responsibility.
Guards and other protective devices are NOT provided
by Enerpac.
10. Before startup, apply a light fi lm of grease to the load screw
threads. Check that the actuator housing is fi lled with
grease. Refer to sections 10.0, 10.1 and 10.2 for additional
instructions.
11. Test the operation of the actuator(s). Start-up should be
closely monitored and break-in periods of several minutes
with careful observation are required.
IMPORTANT: If vibration, binding or excessive motor amperage
draw occurs, immediately shut down the system, lockout power
and repeat the entire alignment procedure.
10.0 LUBRICATION AND MAINTENANCE
WARNING: Always lockout power before performing
any inspection, maintenance, lubrication, adjustment
or repair procedures on the actuator or any associated
power transmission equipment. Be absolutely certain that the
prime mover cannot be remotely or automatically started. Make
sure the load is properly supported before the actuator brake or
other holding devices are removed.
10.1 Lubrication Procedure
New Uni-Lift ® actuators are shipped with grease in the housing.
Lubrication is recommended at regular intervals. Such intervals
are determined by the duty cycles of the actuator, but should be
performed a minimum of once every 60 days.
Internal lubrication is performed by applying grease through one
or more fi ttings located on the outside of the actuator housing.
The number and locations of fi ttings will vary, depending on
actuator size. See fi gure 6.
Perform lubrication as described in the following steps:
1. Use the proper grease as described in section 10.2.
2. Fill the gearbox by pumping grease into each grease fi tting on
the actuator housing. Continue fi lling the unit with grease until
lubricant begins to seep from the load screw opening.
Note: For units equipped with load screw boots, remove the
boot at the actuator before adding grease.
3. Using a clean rag or paintbrush, apply a light fi lm of grease
directly to the load screw threads. See fi gure 7.
10.2 Lubricant Requirements
The lubricant should not be corrosive to gears or to ball or roller
bearings and must be neutral in reaction. In addition, the lubricant
must be oxidation resistant and must be non-channeling.
Operating temperatures must be considered when selecting
lubricants. Enerpac recommends the following extreme pressure
greases or their equivalents:
1. For operation up to 180°F [82°C] - Use Shell Alvania EP2
premium lithium based grease. If another brand of EP2 grease is
used, it should have a viscosity of 840 to 890 SUS at 100°F, and
76 to 84 SUS at 210°F.
2. For operation up to 400°F [204°C] - Use Shell Albida EP2
high temperature grease. If another brand of high temperature
grease is used, it should have a viscosity of 539 SUS @100°F.
3. For operation down to -100°F [-73°C] - Use Shell AeroShell
Grease 7 (Low temperature aviation synthetic hydrocarbon
microgel grease).
Note: Standard Uni-Lift ® models are designed to operate at 80°F
[27°C] with a 100°F temperature rise. For higher temperatures,
special seals are required. Contact Enerpac for additional
information.
4. Special Requirements - Special greases approved for food
industry applications and greases for extremely low temperature
applications below -100°F [-73°F] are available. Contact Enerpac
for additional information.
Figure 6, Grease Fitting Locations (typical - top view)
Lubricate threads with
a light film of grease.
Figure 7, Load Screw Thread Lubrication
(Typical - Side View)
Small Models
Mid-Size Models
Large Models