Enerpac LCA User Manual

Instruction Sheet
Link Clamp
Index:
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®
L2622 Rev A 10/04
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.
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 all
safety precautions to avoid 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.
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.
®
2
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 can 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 by 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 link clamp can be installed with the clamp arm in one of three different locations. The clamps can be mounted to the fixture using either the threaded body or the supplied mounting bolts. Oil can be supplied to the clamp using either the threaded hydraulic ports on the flange or via the O­ring ports on the underside of the flange. The sections that follow provide detailed mounting instructions and should be reviewed before attempting to install the clamps on the fixture.
3.1 Clamp Arm Location
The arm and linkage can be positioned in any of three different positions as shown in Figure 1 below. The anchor post threads into the top flange of the cylinder in any of the three threaded holes. Thread the anchor post into the flange until it bottoms out, then turn the post back up to 1/2 turn in order to line up the pivot pin hole perpendicular to the desired clamp direction (Figure 2). Make sure that the hole in the plunger is lined up parallel to the hole in the anchor post.
Figure 1
Figure 2
Line up the two (2) links with the hole in the anchor post. Insert one (1) of the long pivot pins through the links and the anchor post. Secure the pivot pin in place using two (2) of the supplied E-clips (Figure 3).
Figure 3
Center
Hole in anchor post must line up perpendicular to direction of clamp arm.
Anchor post
Pivot pin
Links
Left Right
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 (Figure 4).
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 (Figure 5).
Figure 5
3.3 Mountings
Cylinder Mounting
Enerpac link clamps can be mounted using either the top flange and the supplied mounting bolts; or through the use of the body thread on the cylinder and a jam nut.
Note: mounting the cylinders using the body threads prevents plumbing the cylinders through the manifold ports on the underside of the flange. The only way to utilize this plumbing method is to flange mount the cylinder.
Flange Mounting
Flange mounting requires the machining of a thru­hole in the fixture plate or mounting block and mounting threads for the four bolts (Figure 6).
See Table 1 below.
Align the cylinder in the proper orientation to provide clamping force to the part and then install the mounting bolts and tighten per the chart below. Failure to tighten the mounting bolts properly can result in damage to the cylinder and premature failure of the clamp.
Threaded Body Mounting
Mounting the cylinder using the body threads requires a clearance hole machined in the fixture plate and the installation of a jam nut to secure the cylinder in place. The clearance hole should be sized according to the dimensions in Figure 6.
The fixture plate can also be machined to matching internal threads as long as the
3
Figure 6
Pull
1)
Fixture Mounting Min. Manifold O-ring
2)
force hole thread depth ARP No. or
lbs Ø D3 J UNF J2 Inside Ø x thickness
700
1.885 .250-28 0.65 -010
1800
2.510 .312-24 0.75 -010
2700
3.135 .312-24 0.75 -010
4300
3.515 .375-24 0.88 -010
6300
4.140 .500-20 0.94 -010
1) With standard clamp arm.
2) Polyurethane, 92 Durometer
Note: Mounting bolts and
O-rings included.
Manifold
O-ring
Table 1
Clamp arm
Clamp arm
Pivot pin
Pivot pin
Link
Plunger
63
[1,6]
D3
ø .19 [4,8]
J2
J
.004
0,1
plate is designed to withstand full clamping capacity. A jam nut is still required in this case to maintain the clamping orientation. The jam nut should be installed on the inside of the fixture plate for most secure mounting.
3.4 Oil Connection
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. The manifold ports can only be used when the cylinder is flange mounted using the four mounting bolts as shown in Figure 6.
Hydraulic Fittings
Enerpac link clamps are supplied with either SAE O­ring ports or BSPP ports in the side of the flange. Single acting cylinders require only one hydraulic port. Unlike many other cylinders, single acting Enerpac link clamps do not require the use of a vent port. Connect the oil supply to this port using fittings rated for a minimum of 5000 psi (350 bar) only.
Double-acting cylinders require two ports to operate. The port marked “A” should be connected to the clamp line of the circuit. The port marked “B” should be connected to the unclamp side of the circuit. Again, be sure to use fittings and tubing rated for a minimum of 5000 psi (350 bar) working pressure.
Manifold ports
Enerpac link clamps can also be plumbed using the manifold ports on the underside of the flange. The clamps are supplied from the factory with small cap screw and copper gasket installed in these ports (Figure 7). Remove these items before installation. The manifold ports require the use of O-rings as face seals between the cylinder flange and the fixture plate. These O-rings are supplied with the clamp, typically in a small plastic bag along with the mounting bolts and the documentation. Install these O-rings (only one O-ring required for single acting cylinders) into the seal grooves on the underside of the mounting flange (Figure 7).
Before installation, the O-rings should be coated with a small amount of hydraulic oil to prevent damage during operation. Mount the clamps using the installation instructions in section 3.3. Remember that the cylinders must be flange mounted when using the manifold porting method.
Figure 7
4.0 OPERATION
Enerpac link clamps operate on hydraulic pressure from 500 to 5000 psi (35-350 bar). This oil pressure is supplied via an external pump plumbed through a circuit of valves to the link clamps and other clamping elements on the fixture. Single acting cylinders only require one hydraulic line to provide clamping force, and use an internal spring to retract the clamp arm when pressure is removed. Double acting cylinders require two hydraulic lines; one line provides pressure to advance the arm and clamp the part; the other line provides pressure to push the arm back and unclamp the part. Either manual, air or electrically operated valves are used to direct oil to one port or another.
5.0 MAINTENANCE
1. Use only Enerpac oil with these cylinders. The use of any other oil may invalidate your warranty.
2. Dynamic hydraulic seals need periodic replacement due to normal wear and tear. A regularly scheduled maintenance inspection plan will help prevent unnecessary interruptions in production due to seal wear.
3. The clamp linkage can be damaged or broken due to mis-loaded parts or excessive contamination build up. Any clips or pins that appear damaged or worn should be replaced immediately.
4. All maintenance should be done by a qualified hydraulic service technician. Enerpac has a global service center network that can provide repair and maintenance services if needed.
4
Remove port
screw plug.
Lower flange
Upper flange
O-ring
O-ring
Remove port
screw plug.
5
PROBLEM POSSIBLE CAUSE/SOLUTION
Control valve not open or damaged. Couplers or fittings not properly connected. Pump is not developing flow or pressure. Linkage is not attached properly. Linkage is bound by either misalignment or built up contamination.
Control valve not open or damaged. Couplers or fittings not properly connected. Pump is malfunctioning. Linkage is bound by either misalignment or built up contamination. Air in hydraulic system.
Control valve damaged. Couplers or fittings leaking. Pump is malfunctioning. Internal seals are damaged and need replacement. Cylinder bore or plunger are damaged and need replacement. Clamp arm is not properly contacting part. Adjust contact screw.
Internal seals are damaged and need replacement. Cylinder bore or plunger are damaged and need replacement. If cylinder is manifold mounted, O-rings could be damaged or pinched and need replacement.
Control valve not open or damaged. Couplers or fittings not properly connected. Pump is malfunctioning. Linkage is bound by either misalignment or built up contamination. Air in hydraulic system. Restrictions in return line. Check all installed accessories such as filters for proper operation.
Cylinder plunger will not advance.
Cylinder advances in spurts.
Cylinder advances but does not hold pressure or provide clamp force.
Cylinder leaks oil.
Cylinder will not retract or retracts slowly.
6.0 TROUBLE-SHOOTING GUIDE
Enerpac Worldwide Locations
Africa
ENERPAC Middle East FZE P. O. Box 18004 Jebel Ali, Dubai United Arab Emirates Tel: +971 (0)4 8872686 Fax: +971 (0)4 8872687
Australia
ENERPAC, Actuant Australia Ltd. Block V Unit 3 Regents Park Estate 391 Park Road Regents Park NSW 2143 (P.O. Box 261) Australia Tel: +61 297 438 988 Fax: +61 297 438 648
Brazil
Power Packer do Brasil Ltda. Rua dos Inocentes, 587 04764-050 - Sao Paulo (SP) Tel: +55 11 5687 2211 Fax: +55 11 5686 5583
Toll Free in Brazil:
Tel: 0800 891 5770 vendasbrasil@enerpac.com
Canada
Actuant Canada Corporation 6615 Ordan Drive, Unit 14-15 Mississauga, Ontario L5T 1X2 Tel: +1 905 564 5749 Fax: +1 905 564 0305
Toll Free:
Tel: +1 800 268 4987 Fax: +1 800 461 2456 Technical Inquiries:
techservices@enerpac.com
China
Actuant China Ltd. 1F, 269 Fute N. Road Waigaoqiao Free Trade Zone Pudong New District Shanghai, 200 131 China Tel: +86 21 5866 9099 Fax: +86 21 5866 7156
Actuant China Ltd. (Beijing) 709A Xin No. 2 Diyang Building Dong San Huan North Rd. Beijing City, 100028 China Tel: +86 10 845 36166 Fax: +86 10 845 36220
Central and Eastern Europe
ENERPAC B.V. Storkstraat 25 P. O. Box 269, 3900 AG Veenendaal The Netherlands Tel: +31 318 535 936 Fax: +31 318 535 951
France
ENERPAC Une division de ACTUANT s.a. B.P. 200 Parc d’Activités du Moulin de Massy F-91882 Massy CEDEX France Tel: +33 1 601 368 68 Fax: +33 1 692 037 50
Germany, Austria, Szwitzerland, Russia, Greence and CIS (excl. Caspian Sea Countries) ENERPAC Applied Power GmbH
P. O. Box 300113 D-40401 Düsseldorf Germany Tel: +49 211 471 490 Fax: +49 211 471 49 28
India
ENERPAC Hydraulics (India) Pvt. Ltd. Plot No. A/571 MIDC, TTC Industrial Area Mahape-400 701 Navi Mumbai, India Tel: +91 22 2778 1472 Fax: +91 22 2778 1473
Italy
ENERPAC S.p.A. Via Canova 4 20094 Corsico (Milano) Tel: +39 02 4861 111 Fax: +39 02 4860 1288
Japan
Applied Power Japan Ltd. 1-1-11, Shimomae Toda-shi, Saitama Pref. Japan 335-0016 Tel: +81 484 30 1055 Fax: +81 484 30 1066
The Netherlands, Belgium, Luxembourg, Sweden, Denmark, Norway, Finland, Baltic States
ENERPAC B.V. Storkstraat 25 P.O. Box 269 3900 AG Veenendaal The Netherlands Tel: +31 318 535 911 Fax: +31 318 525 613
Technical Inquiries Europe:
techsupport.europe@enerpac.com
All Enerpac products are guaranteed against defects in workmanship and materials for as long as you own them. For your nearest authorized Enerpac Service Center, visit us at www.enerpac.com
e-mail: info@enerpac.com
+31 318 535 848
internet: www.enerpac.com
Singapore
Enerpac Asia Pte. Ltd. 25 Serangoon North Ave. 5 #03-01 Keppel Digihub Singapore 554914 Thomson Road, P.O. Box 114 Singapore 915704 Tel: +65 64 84 5108
+65 64 84 3737 1800 363 7722
Fax: +65 64 84 5669
Technical Inquiries:
sales@enerpac.com.sg
South Korea
Actuant Korea Ltd.
3Ba 717, Shihwa Industrial Complex, Jungwang-Dong, Shihung-Shi, Kyunggi-Do Republic of Korea 429-450 Tel: +82 31 434 4506 Fax: +82 31 434 4507
Spain, Portugal
ENERPAC C/San José Artesano 8 Pol. Ind. 28108 Alcobendas (Madrid) Spain Tel: +34 91 661 11 25 Fax: +34 91 661 47 89
Middle East, Turkey , Caspian Sea
ENERPAC Middle East FZE P. O . Box 18004 Jebel Ali, Dubai United Arab Emirates Tel: +971 (0)4 8872686 Fax: +971 (0)4 8872687
United Kingdom, Ireland
ENERPAC Ltd., P.O. Box 33 New Romney, TN28 8QF United Kingdom
44 01797 363 639
Tel: + Fax: +44 01527 585 500
USA, Latin America and Caribbean
ENERPAC P. O. Box 3241 6100 N. Baker Road Milwaukee, WI 53209 USA Tel: +1 262 781 6600 Fax: +1 262 783 9562
User inquiries:
+1 800 433 2766
Distributor inquiries/orders:
+1 800 558 0530
Technical Inquiries:
techservices@enerpac.com
081904
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