Enerpac LW16, Instruction Sheet

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4.0 DESCRIPTION
Enerpac LW Series hydraulic vertical lifting wedges provide
a convenient way to lift large, heavy objects for which floor
clearance is limited.
Two models are available. Model LW-16 features a built-in
single-acting hydraulic cylinder and is powered by an external
hydraulic pump (user supplied).
Model LWC-16 is similar to the LW-16, but contains an integral
hydraulic hand pump for added convenience and portability.
The minimum access gap (clearance between floor and bottom
edge of object) is only 0.39 inch [10 mm] for each LW Series
model.
Maximum lifting capacity of both models is 16 tons [157 kN].
For the LW-16, optional Enerpac AM Series split flow manifolds
allow either 2 or 4 wedges to be used simultaneously to lift
32 or 64 tons [314 or 628 kN] respectively.
The lifting jaw surface of the wedge contains a series of steps.
Any of the steps can be used to support the tool's full rated
load.
The unique interlocking wedge design of the LW Series helps
reduce the possibility of the wedge slipping out from under the
load and also helps prevent bending of the wedge's first step.
A built-in return spring automatically retracts the wedge when
hydraulic pressure is relieved.
5.0 RECEIVING INSTRUCTIONS
Visually inspect all components for shipping damage. Shipping
damage is not covered by warranty. If shipping damage is
found, notify carrier at once. The carrier is responsible for
all repair and replacement costs resulting from damage in
shipment.
6.0 PREPARATION FOR USE
6.1 Hydraulic Pump Requirements (Model LW-16 only)
The hydraulic pump is sold separately and is not included with
the LW-16 lifting wedge.
To allow precise control of lifting wedge speed and movement,
it is recommended that a hand-operated hydraulic pump be
used with the LW-16.
A powered pump can be used if desired. However, the hydraulic
flow must be carefully regulated so that the load is not raised
too quickly and there are no abrupt movements.
Whichever type of pump is used, be certain that it is rated
at 10,000 psi [700 bar] and is capable of holding a sufficient
amount of hydraulic oil to operate the lifting wedge (or set of
lifting wedges) to full extension.
The pump must be designed for use with single acting devices
and must be equipped with a pressure release valve (or suitable
directional control valve). Installation of additional devices in
the circuit may be required to regulate retract and advance
speed.
The pump must also be equipped with a separate safety
pressure relief valve that opens if the system working pressure
exceeds 10,000 psi [700 bar]. Verify that the pump safety relief
valve is adjusted to this setting before using the pump with the
lifting wedges(s).
Always monitor the system hydraulic pressure during
operation. A pressure gauge (user supplied) should be installed
in the line between the pump and the LW-16 lifting wedge. The
installation of multiple pressure gauges is recommended for
systems using more than one lifting wedge.
6.2 Hydraulic Oil Requirements (Model LW-16 only)
Use of Enerpac HF Series ISO 32 hydraulic oil is recommended.
Enerpac hydraulic oil is available at your local Enerpac
Distributor or Authorized Service Center.
NOTICE
• Failure to use the correct oil type may result in damage to
hydraulic components and will void the product warranty.
• Be sure that the oil is clean. The oil cleanliness should
be maintained to a maximum level of 18/16/13 per the
ISO 4406 standard. If the oil develops a milky, cloudy or dark
appearance, it should be changed immediately.
• To avoid overfilling and possible equipment damage, add
oil to the pump reservoir only after all lifting wedges are
completely retracted and system pressure is relieved.
• When using a hand-operated pump, it is permissible to use
a high-quality brand of ISO 15 hydraulic oil. The lower oil
viscosity will result in reduced pumping effort, especially in
cold weather conditions.
6.3 Hydraulic Oil Requirements (Model LWC-16 only)
The hydraulic reservoir of the LWC-16 lifting wedge is pre-filled
at the factory with ISO 15 hydraulic oil. The reservoir should
not require additional oil under normal operating conditions. It
is NOT necessary to periodically check the oil level.
NOTICE
Do not loosen or remove the oil drain/fill plug.
Special procedures are required to properly check the oil level
and to add oil to the bladder style reservoir. If it is suspected
that the oil level is low, take the unit to your Enerpac Authorized
Service Center for inspection.
6.4 Hydraulic Connections (Model LW-16 only)
Model LW-16 is equipped with one Enerpac CR-400 High Flow
female coupler. This 3/8" NPTF coupler provides hydraulic flow
for both advance and retract functions and is compatible with
all Enerpac HC Series hydraulic hoses.
After making connections, be certain that all couplers used in
the system are fully connected, so that hydraulic flow is not
blocked or restricted.
All hoses, fittings and other hydraulic components in the circuit
must be rated for at least 10,000 psi [700 bar] operation.
6.5 Air Removal (Model LW-16)
Trapped air must be purged from the lifting wedge and hose
before placing the system into operation. If multiple lifting wedges
are to be used, it is recommended that air be removed from each
lifting wedge individually. Refer to the following procedure:
1. Position the tool vertically with the lifting wedge pointed
downward. To ensure complete air removal, be sure that the
hydraulic cylinder is positioned lower than the pump reservoir.
2. Close the pump release valve.
3. Operate the hand pump lever until the wedge is fully
extended Then, open the release valve to retract the
wedge. Repeat this process several times, until all air is
removed and operation is smooth. Check that oil reservoir
is full after air purging is completed.
NOTICE
The pump reservoir vent (if equipped) must be
opened before the lifting wedge is advanced. Failure to vent
the system will result in a vacuum and the lifting wedge will not
advance.
6.6 Air Removal (Model LWC-16)
Trapped air must be purged from the internal hydraulic system
before placing the tool into operation. Refer to the following
procedure:
1. Position the tool vertically with the lifting wedge end
pointed downward. Close the release valve (turn release
valve knob in the clockwise direction until hand tight - DO
NOT use tools).
2. Operate the hand pump lever until the wedge is fully
extended. Then, open the release valve to retract the
wedge. Repeat this process several times, until all air is
removed and operation is smooth.