Enerpac LU7 User Manual
L3008 Rev. A Date: 02/11
Index:
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Repair Parts Sheets for this product are available
from the Enerpac web site at www.enerpac.com, or
from your nearest Authorized Enerpac Service Center
or Enerpac Sales office.
N/A
1.0 IMPORTANT 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.
SAFETY FIRST
2.0 SAFETY ISSUES
Read all instructions, warnings
and cautions carefully. Follow
personal injury or property damage during system
operation. Enerpac cannot be responsible for damage
or injury resulting from unsafe product use, lack of
maintenance or incorrect product and/or system
operation. Contact Enerpac when in doubt as to the
safety precautions and operations. If you have never
been trained on high-pressure hydraulic safety,
consult your distribution or service center for a free
Enerpac Hydraulic safety course.
Failure to comply with the following cautions and
warnings could cause equipment damage and
personal injury.
A CAUTION is used to indicate correct operating or
maintenance procedures and practices to prevent
damage to, or destruction of equipment or other
property.
A WARNING indicates a potential danger that
requires correct procedures or practices to avoid
personal injury.
A DANGER is only used when your action or lack of
action may cause serious injury or even death.
all safety precautions to avoid
Instruction Sheet
70 Bar Link Clamp
WARNING: Wear proper personal
protective gear when operating hydraulic
equipment.
WARNING: Stay clear of loads supported
by hydraulics. A cylinder, when used as a
load lifting device, should never be used as
a load holding device. After the load has been raised
or lowered, it must always be blocked mechanically.
DANGER: To avoid personal injury
keep hands and feet away from cylinder
and workpiece during operation.
WARNING: Do not exceed equipment
ratings. Never attempt to lift a load
weighing more than the capacity of the
cylinder. Overloading causes equipment failure and
possible personal injury. The cylinders are designed
for a max. pressure of 350 bar [5,000 psi]. Do not
connect a jack or cylinder to a pump with a higher
pressure rating.
DANGER: Never set the relief valve to a
higher pressure than the maximum rated
pressure of the pump. Higher settings
may result in equipment damage and/or personal
injury. Do not remove relief valve.
WARNING: The system operating
pressure must not exceed the pressure
rating of the lowest rated component in
the system. Install pressure gauges in the
system to monitor operating pressure. It is your
window to what is happening in the system.
CAUTION: Avoid damaging hydraulic
hose. Avoid sharp bends and kinks when
routing hydraulic hoses. Using a bent or
kinked hose will cause severe back-pressure. Sharp
bends and kinks will internally damage the hose
leading to premature hose failure.
Do not drop heavy objects on hose. A
sharp impact may cause internal damage
®
to hose wire strands. Applying pressure to
a damaged hose may cause it to rupture.
IMPORTANT: Do not lift hydraulic
equipment by the hoses or swivel
couplers. Use the carrying handle or other
means of safe transport.
CAUTION: Keep hydraulic equipment
away from flames and heat. Excessive
heat will soften packings and seals,
resulting in fluid leaks. Heat also weakens hose
materials and packings. For optimum performance
do not expose equipment to temperatures of 65 °C
[150 °F] or higher. Protect hoses and cylinders from
weld spatter.
DANGER: Do not handle pressurized
hoses. Escaping oil under pressure can
penetrate the skin, causing serious injury.
If oil is injected under the skin, see a doctor
immediately.
WARNING: Only use hydraulic cylinders in
a coupled system. Never use a cylinder
with unconnected couplers. If the cylinder
becomes extremely overloaded, components ca n fail
catastrophically causing severe personal injury.
IMPORTANT: Hydraulic equipment must
only be serviced by a qualified hydraulic
technician. For repair service, contact the
Authorized ENERPAC Service Center in your area. To
protect your warranty, use only ENERPAC oil.
WARNING: Immediately replace worn or
damaged parts with genuine ENERPAC
parts. Standard grade parts will break
causing personal injury and property damage.
ENERPAC parts are designed to fit properly and
withstand high loads.
3.0 INSTALLATION
The Enerpac 70 bar link clamp features an upper
flange design. The clamp can be mounted to the
fixture using the supplied mounting bolts. Oil can be
supplied to the clamp using either the BSPP hydraulic
ports on the flange or via the O-ring manifold ports
on the underside of the flange. The following sections
of this manual include detailed mounting instructions
that should be reviewed before attempting to install
the clamp on the fixture.
Center
Left Right
Figure 1
To install the linkage components, line up the two (2)
links with the hole in the anchor lug. Insert one (1) of
the long pivot pins through the links and the anchor
lug. Secure the pivot pin in place using two (2) of the
supplied E-clips (See Figures 2 and 3).
Hole in anchor
post must line up
perpendicular to
direction of clamp
arm.
Figure 2
Links
Anchor
Post
Pivot Pin
(long)
3.1 Clamp Arm Location
The Enerpac 70 bar link clamp contains an anchor
lug that is integral to the body. Models are available
that place this lug at a center, right or left position in
relation to the hydraulic ports (See Figure 1).
Figure 3
2
3.2 Arm Attachment
Place the clamp arm over the plunger end, lining up
the pivot pin holes. The clamp arm should extend
between the two links previously installed. Insert
the supplied short pivot pin through the arm and the
plunger, securing the parts together with the supplied
E-clips (See Figure 4).
3.3 Cylinder Mounting
The Enerpac 70 bar link clamp features a 4 bolt
flange style body for mounting the cylinder to the
fixture plate. Mounting bolts of the proper size and
length are supplied. Flange mounting requires the
machining of a through hole in the fixture plate or
mounting block and threads for the four (4) mounting
bolts. (See Figure 6 and Table 1).
Align the cylinder in the proper orientation to provide
Clamp Arm
clamping force to the part. Then, install the mounting
bolts and tighten per the value shown in Table 1.
Failure to properly tighten the mounting bolts can
result in damage to the cylinder and premature failure
of the clamp.
Plunger
Pivot Pin
(short)
Figure 4
Then, insert the second long pivot pin through the
top holes on the links and through the top hole on
the clamp arm, securing it with the last two supplied
E-clips (See Figure 5).
.5mm x 45°
Clamp Arm
Pivot Pin (long)
Link
3.4 Oil Connections
The cylinder can be plumbed using either the
hydraulic ports on the side of the flange, or the
manifold O-ring ports on the underside of the flange.
When using the manifold O-ring ports, use a 4.8 mm
diameter feed passage. The feed passage should
align with the center of the O-ring.
Hydraulic Fittings
The Enerpac 70 bar link clamp is supplied with BSPP
ports in the side of the flange. Connect the oil supply
to these ports using fittings rated for a minimum of
70 bar [1000 psi] only. Single acting (spring return)
Figure 5
models are vented. The supplied vent fitting may be
removed if using the manifold port for the vented
port.
Table 1 - Specifications
Clamp
Force
kN lbs.
2 450
3.5
5
7
9
1) At rated clamp point. 2) O-rings and mounting bolts are included.
1)
787
1124
1574
2023
Mounting
Hole
Ø D3
mm
Mounting Bolt
Thread
J
Min. Depth
J2
mm
36.5 M5 x .08 x 30 mm long 12 568-010 8.0-9.0
42.5 M5 x .08 x 30 mm long 12 568-010 8.0-9.0
48.5 M6 x 1.0 x 30 mm long 16 568-011 13.5-15.0
54.5 M6 x 1.0 x 30 mm long 16 568-011 13.5-15.0
60.5 M8 x 1.25 x 30 mm long 18 568-011 32.0-38.0
3
Manifold
O-Rings
(included)
63
ø 4,8
Manifold O-ring
øD3
Mtg. Hole
Figure 6
ARP No.
J2
J
2)
Mounting Bolts
(included)
0.004
Lubricated
Bolt Torque
Nm
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