Enerpac ASC User Manual

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.

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.

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
can fail catastrophically causing severe personal injury.

Instruction Sheet

ASC-30 / ASC-100

Swing Clamps

L1678 Rev. O 03/03

ASC-30

®

®

2

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 DESCRIPTION

Enerpac ASC Swing Clamps have a clamping arm that swings in
a clockwise (R.H.) rotation 97° to position itself over the
workpiece. Then, a vertical plunger exerts an upward thrust on the
back end of the swing arm providing a powerful downward
pressure to clamp the workpiece. Swing clamp arm direction can
be changed to counter-clockwise (L.H.) rotation. See section 4.1.

Figure 1

4.0 INSTALLATION

4.1 Changing Rotation Direction

All Enerpac ASC Swing Clamps are assembled to swing
clockwise (R.H.). Follow instructions below to change rotation to
counter-clockwise (L.H.) and refer to Figure 2.

1. Remove retaining ring (1) and fulcrum pin (2) and lift off
clamping arm (3).

2. Remove arm spring (4). Mark the position of the spring on the
fulcrum (5).

3. Unscrew set screw (6) and remove cover (7).

4. Remove R.H. torsion spring (8) and replace with L.H. torsion
spring (supplied with cylinder).

5. Replace cover (7) making sure the top tongue of the torsion
spring (8) locates in the hole in the cover.

6. Turn cover (7) counter-clockwise 90° to load spring (8).

7. Tighten set screw (6) making sure the point engages the hole
in the swivel fulcrum (5).

8. Loosen inlet plug three turns (9). Insert a screwdriver through
the inlet bushing (9) and rotate the plunger (10) 180°.

9. Retighten inlet plug (9).

10. Use screwdriver to push plunger (10) to bottom to rotate the
swivel fulcrum (5) and check for proper rotation direction.

11. Replace arm spring (4) in clamping hole at 90° from original
position.

12. Place clamping arm (3) in opposite "at rest" position.

13. Insert fulcrum pin (2) and replace retaining ring (1).

Figure 2

Specifications ASC-30 ASC-100

Rated capacity (lbs.) 1,375 4,375

Rated operating pressure (psi) 1,200 to 2,500 max. 1,200 to 2,500 max.

Hydraulic port 0.125-27 NPT 0.125-27 NPT

Hydraulic Plunger Stroke (in) 0.25 0.43

Clamping volt length (in) 0.75 min.* 0.73 min.*

* Clamping bolt length can be changed to accommodate lower clamping height.

ASC-30

ASC-100

2

6

8

Top View

4

5

1

5

10

7

3

9