Enerpac L2586 User manual

Instruction Sheet
Aluminum Cylinders
L2586 Rev B 05/2019
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.
danger.eps
WARNING: Aluminum cylinders
sold by Enerpac have been
designed to safely withstand up to
5,000 full pressurization cycles. THIS LIMIT
SHOULD NOT BE EXCEEDED. Use of these
cylinders beyond their rated life can lead to
sudden failure without warning and could
cause property damage, injury, or death.
danger.eps
WARNING: The steel base plate
protects the cylinder base from
damage and should not be removed.
The base holes in these aluminum cylinders
are designed for securing the steel base plate.
They will not withstand the capacity of the
cylinder. Do not use the base holes in these
aluminum cylinders to attach any device to the
cylinder.
sgls.eps
WARNING: Wear proper personal
protective gear when operating
hydraulic equipment.
undr.eps
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.
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blkd.eps
WARNING: USE ONLY RIGID
PIECES TO HOLD LOADS. Carefully
select steel or wood blocks that are
capable of supporting the load. Never use a
Index:
English.......................................................... 1-4
Français........................................................ 5-8
Deutsch ..................................................... 9-12
Italiano...................................................... 13-16
Español.................................................... 17-20
Nederlands .............................................. 21-24
Portuguese ............................................. 25-28
................................................... 29-32
中文
................................................... 33-35

2
hydraulic cylinder as a shim or spacer in any
lifting or pressing application.
DANGER: To avoid personal
injury keep hands and feet
away from cylinder and
workpiece during operation.
Dexceed.eps
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 700 bar [10,000 psi]. Do not connect a jack
or cylinder to a pump with a higher pressure
rating.
danger.eps
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.
gge.eps
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.
hosbnd.eps
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.
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drag.eps
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.
inject.eps
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.
bdyhit.eps
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.
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stblty.eps
WARNING: BE SURE SETUP IS
STABLE BEFORE LIFTING LOAD.
Cylinders should be placed on a flat
surface that can support the load.
Where applicable, use a cylinder base for
added stability. Do not weld or otherwise
modify the cylinder to attach a base or other
support.
danger.eps
Avoid situations where loads are not
directly centered on the cylinder
plunger. Off-center loads produce
considerable strain on cylinders and plungers.
In addition, the load may slip or fall, causing
potentially dangerous results.
sdle.eps
Distribute the load evenly across the
entire saddle surface. Always use a
saddle to protect the plunger.
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.
sman.eps
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
1. Make hydraulic connections. Use a pump
with a release valve or a 3-way valve and
one hose for single-acting cylinders (1).
Use a pump with a 4-way valve and two
hoses for double-acting cylinders (2).
IMPORTANT: Double-acting cylinders must
have both couplers connected.
Fully hand-tighten all couplers. Loose
coupler connections will block the flow of
oil between the pump and the cylinder.
2. Remove air from the cylinder as shown
below.
Single-acting cylinders: Position the
cylinder so that the plunger is pointed down
and the cylinder lower than the pump. Fully
extend and retract the cylinder 2 or 3 times.
Double-acting cylinders: Lay the cylinder
on its side and have the couplers facing up.
Fully extend and retract the cylinder 2 or 3
times.
NOTE: Collar threads are rated for the full
capacity of the cylinder when fully engaged in
attachments.
NOTE: The use of cylinder attachments or
extensions reduces the cylinder capacity by
at least 50%.
4.0 OPERATION
Operate the hydraulic pump to advance
and retract the cylinder. Some single-acting
cylinders are spring-return, others are load-
return. The speed of retraction is affected by
the length of the hose and other restrictions in
the line. Double-acting cylinders are powered
in both directions by the pump.
The cylinder stop ring is designed to take the
full load. However, to reduce cylinder wear,
use less than full stroke when possible.
NOTE: Manufacturer’s rating of load and
stroke are maximum safe limits. Good practice
encourages using only 80% of these ratings!
5.0 MAINTENANCE
1. Use only Enerpac oil with these cylinders.
The use of any other oil may invalidate your
warranty.
2. Use dust caps when cylinders are
disconnected from the hose. Keep entire
cylinder clean to prolong cylinder life.
3. Store cylinders upright to prevent seal
distortion.
6.0 TROUBLESHOOTING
See Troubleshooting Chart on page 4.
These cylinders should be repaired only by
Authorized Enerpac Technical Service Centers.
Single-acting cylinders are spring-loaded and
require special disassembly techniques to
prevent personal injury.
3
AB
air
air

4
PROBLEM
Cylinder will not advance.
Cylinder advances part way.
Cylinder advances in spurts.
Cylinder advances slower than normal.
Cylinder advances but will not hold.
Cylinder leaks oil.
Cylinder will not retract or retracts slower
than normal.
Oil leaking from external relief valve.
POSSIBLE CAUSE
Pump release valve open.
Coupler not fully tightened.
Oil level in pump is low.
Pump malfunctioning.
Load is too heavy for cylinder.
Oil level in pump is low.
Coupler not fully tightened.
Cylinder plunder binding.
Air in hydraulic system.
Cylinder plunger binding.
Leaking connection.
Coupler not fully tightened.
Pump malfunctioning.
Cylinder seals leaking.
Pump malfunctioning.
Leaking connection.
Incorrect system set-up.
Worn or damaged seals
Internal cylinder damage.
Loose connection.
Pump release valve is closed.
Coupler not fully tightened.
Pump reservoir over-filled.
Narrow hose restricting flow.
Broken or weak retraction spring.
Cylinder damaged internally.
Coupler not fully tightened.
Restriction in return line.