Enerpac ZE2 Series User manual

To reduce the risk of injury, user must read and understand this document before use.
Operation and Maintenance Manual
Document Number: L4555
Document Revision: A
Issue Date: July, 2021
Language: English EN
ZE2-Series and ZW2-Series
Electric Hydraulic Pumps
Manual Valve Models
Electric Valve Models

2L4555_a
ABOUT US
Enerpac is a global market leader in high pressure hydraulic
tools, controlled force products, portable machining, on-
site services and solutions for precise positioning of heavy
loads. As a leading innovator with over a 100 year legacy,
Enerpac has helped move and maintain some of the largest
structures on earth. When safety and precision matters, elite
professionals in industries such as aerospace, infrastructure,
manufacturing, mining, oil & gas and power generation rely
on Enerpac for quality tools, services and solutions. For
additional information, visit www.enerpac.com.
WARRANTY
Refer to the Enerpac Global Warranty document for terms and conditions of the product warranty. Such warranty
information can be found at www.enerpac.com.
NAMEPLATE
Refer to the pump nameplate for the product model number, serial number and other applicable information.
Note: Typical nameplates are shown above. Nameplate data will vary depending on pump model and configuration.
AVAILABLE LANGUAGES
An electronic copy of this document is available online in multiple languages:
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EN
English - For other languages, visit www.enerpac.com.
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CS
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L4555_a 3
1.0 SAFETY...................................................................................................................................................... 4
2.0 COMPLIANCE ........................................................................................................................................... 7
3.0 SPECIFICATIONS AND PRODUCT DATA ................................................................................................ 8
4.0 FEATURES AND COMPONENTS ........................................................................................................... 12
5.0 DESCRIPTION......................................................................................................................................... 13
6.0 INSTALLATION AND SETUP................................................................................................................... 13
7.0 OPERATION............................................................................................................................................. 14
8.0 RELIEF VALVE PRESSURE ADJUSTMENT........................................................................................... 18
9.0 MAINTENANCE....................................................................................................................................... 19
10.0 TROUBLESHOOTING ............................................................................................................................. 22
CONTENTS PAGE

4L4555_a
• The system operating pressure must not exceed the
pressure rating of the lowest rated component in the
system. Install pressure gauge(s) in the system to
monitor operating pressure. It is your window to see
what is happening in the system.
• Wear personal protective equipment (P.P.E.) when
operating hydraulic equipment. Always wear eye
protection. Safety equipment such as dust mask,
non-skid safety shoes, hard hat, or hearing protection
used for appropriate conditions will reduce personal
injuries.
• Immediately replace worn or damaged parts with
genuine Enerpac parts. Enerpac parts are designed
to fit properly and to withstand high loads. Non-
Enerpac parts may break or cause the pump to
malfunction.
Failure to observe and comply with the following
precautions could result in minor or moderate personal
injury. Property damage could also occur.
• Do not use or repair damaged hydraulic hoses.
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 hydraulic hoses. A
sharp impact may cause internal damage to hose
wire strands. Applying pressure to a damaged hose
may cause it to rupture.
• Do not lift hydraulic equipment by the hoses or
swivel couplers. Use the carrying handle or strap.
• 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.
• Protect all hydraulic equipment from weld spatter.
NOTICE
Hydraulic equipment must only be serviced by a
qualified hydraulic technician. For repair service, contact
the Enerpac Authorized Service Center in your area.
1.1.2 Lifting Pump Safety Precautions
(All ZE2-Series Pumps)
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Do not allow persons to be under a hydraulically
supported load. Always support the load with
stands, blocking or other suitable supports before
allowing persons to enter the work area below the
load.
• Stay clear of cylinders and tools while they are being
pressurized or in operation. To avoid personal injury,
keep hands and feet away from pinch point areas.
CAUTION
WARNING
1.0 SAFETY
Read all instructions carefully. Follow all recommended
safety precautions to avoid personal injury as well as
damage to the product and / or damage to other property.
Enerpac cannot be responsible for any damage or injury
from unsafe use, lack of maintenance, or incorrect
operation. Do not remove warning labels, tags, or decals.
In the event that any questions or concerns arise, contact
Enerpac or a local Enerpac distributor for clarification.
Save these instructions for future use.
Appropriate training in the safe use of high pressure, high
force hydraulic tools is required prior to the operation of
the pump. If training is needed, contact your local Enerpac
distributor or authorized service center for information
about an Enerpac hydraulic safety training course.
This manual follows a system of safety alert symbols,
signals, words, and safety messages to warn the user of
specific hazards. Failure to comply with these warnings
could result in death or serious personal injury, as well as
damage to the equipment or other property.
The Safety Alert Symbol appears throughout
this manual. It is used to alert you to potential
physical injury hazards. Pay close attention
to Safety Alert Symbols and obey all safety
messages that follow this symbol to avoid the possibility
of death or serious injury.
Safety Alert Symbols are used in conjunction with certain
Signal Words that call attention to safety messages or
property damage messages and designate a degree or
level of hazard seriousness. The Signal Words used in this
manual are WARNING, CAUTION and NOTICE.
WARNING
Indicates a hazardous situation that, if not
avoided, could result in death or serious personal injury.
CAUTION Indicates a hazardous situation that, if not
avoided, could result in minor or moderate personal injury.
NOTICE
Indicates information considered important, but
not hazard related (e.g. messages related to property
damage). Please note that the Safety Alert Symbol will
not be used with the signal word.
1.1 Hydraulic Safety Precautions
1.1.1 General Hydraulic Safety Precautions
(All ZE2 and ZW2-Series Pumps)
WARNING
Failure to observe and comply with the
following precautions could result in death or serious
personal injury. Property damage could also occur.
• Do not remove or disable the pressure relief valve.
• Never set the pressure relief valve to a higher
pressure than the maximum rated pressure of the
pump.
• Do not pressurize disconnected couplers.
• Do not handle pressurized hydraulic hoses. Escaping
oil under pressure can penetrate the skin. If oil is
injected under the skin, see a doctor immediately.

L4555_a 5
• Never use a double-acting cylinder or tool with
uncoupled couplers. If the cylinder or tool becomes
extremely overloaded, components can fail
catastrophically.
• Use only rigid pieces to hold loads. Carefully select
steel or wood blocks that are capable of supporting
the load.
• Never use a hydraulic cylinder or tool as a shim or
spacer in any application.
• 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.
• 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.
• 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.
1.1.3 Workholding Pump Safety Precautions
(All ZW2-Series Pumps)
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Although hydraulic operation moves the control of
the clamping fixture to an area of greater safety,
operators must still remain alert and use common
sense practises during their work.
• Use care when selecting components for the
workholding application so that safe operation
is ensured. Be certain that all components and
devices are of adequate rated capacity to perform
their intended functions. Do not exceed equipment
ratings.
• Verify that all appropriate safety measures have
been taken to avoid the risk of injury and property
damage from your application or system.
• Be sure that all personnel involved with operating
or servicing the workholding devices read and
understand the information contained in the manuals
included with these devices. Observe and follow all
safety instructions and precautions contained in the
manuals.
• Design the control units of power operated clamping
systems to avoid inadvertent or unauthorized
activation.
• Be sure that clamping cylinders and other similar
workholding devices are properly positioned before
clamping forces are applied.
• Maintain a safe distance from clamping elements
and workpiece to avoid personal injury. Stay clear of
pinch points. Keep your hands, feet and body away
from the clamping area.
WARNING
• Use mechanical devices and not fingers to hold
a part in place until the clamping hydraulics are
activated. Do not remove or disable the pressure
relief valve.
1.2 Electrical Safety Precautions
1.2.1 Avoiding Electrical Shock
Risk of electric shock! Failure to observe the
following instructions and precautions may
result in serious personal injury or death.
• Connect the pump power cord only to a grounded
electrical outlet. Use only a power cord with a
ground pin.
• Unplug pump power cord from outlet before
performing cleaning, maintenance or repairs.
1.2.2 Electrical Safety
WARNING
Failure to observe and comply with the following
precautions may result in death or serious personal injury.
Property damage could also occur.
• High voltage is present inside the pump even when
motor is off. Before opening the pump housing
or performing any maintenance or repairs, be
sure that the pump power cord is disconnected
from the electrical outlet or other electrical power
source (refer to additional safety information in
Section 1.2.6 of this manual).
• Always be certain that the pump is stopped and
disconnected from AC power supply before
performing any inspection, maintenance or repair
procedures.
• Do not leave the pump unattended in the workplace
when connected to AC power supply. Take all
reasonable precautions to avoid unauthorized use.
• Take precautions so that the pump is not switched
on accidentally.
• If it is not possible to unplug the pump power cord
from the AC power outlet, the power must be turned
off and locked out at the AC power supply.
• Always disconnect the pump from AC power supply
before transporting it.
• Do not use the pump if it cannot be switched on and
off using the pump on-off switch or pendant buttons
(as applicable for your pump model). Pump must be
repaired before use.
• Make sure the pump motor fan vents are
unobstructed and free of dirt or dust.
• Do not service or clean the pump while the pump is
operating and/or if pump is connected to AC power
supply.
• Keep the pump out of the reach of children. Do not
allow inexperienced users or users who have not
read the instructions to operate them.
WARNING

6 L4555_a
1.2.3 Use and Care
Failure to observe the following instructions and
precautions may result in serious personal injury or death.
• Do not service or clean the pump while it is operating
or if it is connected to AC power supply.
• Store the pump indoors. Keep in a secured area to
prevent use by unauthorized personnel.
• Do not clean the pump with a water spray or the like.
• Do not operate the pump with a damaged cord or
plug, or after the pump malfunctions or is dropped
or damaged in any manner. Return the pump to
the nearest Enerpac authorized service center for
examination, repair, or electrical or mechanical
adjustment.
1.2.4 Grounding Instructions
Failure to observe the following instructions and
precautions may result in serious personal injury or death.
• The pump must be properly grounded. In the event
of malfunction or breakdown, grounding provides a
path of least resistance for electric current to reduce
the risk of electric shock. The pump is equipped with
a cord having an equipment grounding conductor.
• A grounding plug is included with the cord. The plug
must be plugged into an appropriate outlet that is
properly installed and grounded in accordance with
all local codes and ordinances.
• Improper connection of the pump grounding
conductor can result in electric shock. The conductor
with insulation having an outer surface that is green
with or without yellow stripes is the pump grounding
conductor.
• If the cord and/or plug are damaged, do not
connect the pump to a live electrical outlet. Repair
or replace the damaged items as required and be
sure the grounding conductor is properly wired
before reconnecting the pump to the outlet. Consult
a qualified electrician if grounding conductor wiring
procedures are not completely understood or if there
is any doubt as to whether the pump is properly
grounded.
• Do not modify the plug provided with the pump. If
the plug will not fit in the outlet, have a proper outlet
installed by a qualified electrician.
• A qualified electrician should be consulted if there
is any doubt as to whether an outlet box is properly
grounded.
• The pump is equipped with an electric power cord
and plug specific to its rated single-phase voltage.
No adapter should be used with the plug.
WARNING
WARNING
• If the pump must be reconnected for use on a
different type of electric circuit, the reconnection
should be made by a qualified electrician. After the
reconnection, the pump should comply with all local
codes and ordinances.
1.2.5 Use of Extension Cords
Failure to observe the following instructions and
precautions may result in serious personal injury or death.
• Use the proper size extension cord with the
pump power cord when use of an extension cord
is necessary. A qualified electrician should be
consulted to help specify and select the proper size
extension cord. The marked electrical rating of the
extension cord should be at least as great as the
electrical rating of the pump.
• The extension cord should be a grounding-type
3-wire cord for single-phase power.
• A long extension cord should be arranged so that it
will not drape over any working area where it can be
tripped over, snagged, or pulled on unintentionally.
• If the pump is to be operated outdoors and an
extension cord is needed, use only an outdoor-
use extension cord. An outdoor-use extension cord
will be clearly marked with the suffix letter “W”
and the statement “Suitable for Use with Outdoor
Appliances.”
1.2.6 Disconnecting Power
WARNING
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Be sure that the pump is off before removing plug
from electrical outlet.
• Do not unplug the pump by pulling on the cord. To
unplug, grasp the plug, not the cord.
• Remove plug from electrical outlet when the pump
is not in use and before servicing or cleaning the
pump.
1.3 Additional Precautions
WARNING Do not use electric pumps in an explosive
atmosphere. Sparks and electrical arcing could ignite
combustible vapors or airborne dust
CAUTION Check electrical power requirements on
pump data plate. Power of incorrect specifications may
damage the motor.
WARNING

L4555_a 7
1.4 Ingress Protection Rating
WARNING
Failure to operate pump in accordance with the stated
ingress protection (IP) rating could result in death, electric
shock or serious personal injury. Damage to the pump
could also occur.
• The pump IP rating is IP54.
• The remote pendant IP rating (if equipped) is IP54.
• Outdoor use is permitted.
• Limited exposure to dust and moisture is permitted
in accordance with the stated IP rating. However,
the pump should be stored in a dry and protected
environment when not in use.
• Do not immerse the pump in water or other liquids.
• Do not allow water jets to contact the pump.
1.5 Labels
Various labels (decals, labels, symbols etc.) are affixed to
the pump. In some instances, these labels advise the user
of potentially hazardous situations. These labels typically
contain symbols instead of text. Understand the meaning
of each symbol before using the pump.
Read Instructions: Read the product
instruction sheet before operating the
product and before performing any
inspection, adjustment, maintenance or
repair procedures.
Dangerous Voltages/Shock Hazard: To
avoid the possibility of a dangerous and
potentially lethal electrical shock,
disconnect pump power cord from
electrical outlet before opening the pump
case.
Hot Surfaces Hazard: Hot surfaces can
cause burns. Keep away from hot
surfaces.
Make sure all labels are legible and securely affixed to
the pump. If worn or missing, obtain replacements from
Enerpac.
2.0 COMPLIANCE
2.1 Compliance Statements
Enerpac ZE2 & ZW2-Series Electric Hydraulic Pumps
(all models)
Enerpac declares that the Enerpac ZE2 and ZW2-Series
electric hydraulic pumps have been tested and conform
to applicable standards and are approved to carry the CE,
TÜV and UKCA certification marks.
NOTICE
For all pumps, a copy of the product EU
Declaration of Conformity is enclosed with each shipment.
A copy of the UK Self Declaration of Conformity is also
enclosed

8L4555_a
3.0 SPECIFICATIONS AND PRODUCT DATA
3.1 Model and Feature Overview
Pump
Model No.
Control Valve
Description
Max Hyd.
Working
Pressure
For Use With: Additional Features
Pump Weight
lb kg
ZE2108D_
VE32D
3-way, 2-position
Dump Valve
10,000 psi
[700 bar]
Single-acting
hydraulic cylinders
or tools.
• One-button remote pendant.
• Pendant button starts & stops motor.
• Electrically operated dump valve.
93.5 42.4
ZE2208M_
VM32
3-way, 2-position
Manual Valve
10,000 psi
[700 bar]
Single-acting
hydraulic cylinders
or tools.
• No remote pendant.
• Rotary motor power switch.❖
• Manually operated control valve.
83.3 37.8
ZE2308M_
VM33
3-way, 3-position
Tandem Center
Manual Valve
10,000 psi
[700 bar]
Single-acting
hydraulic cylinders
or tools.
• No remote pendant.
• Rotary motor power switch.❖
• Manually operated control valve with hold.
84.2 38.3
ZE2408M_
VM43
4-way, 3-position
Tandem Center
Manual Valve
10,000 psi
[700 bar]
Double-acting
hydraulic cylinders
or tools.
• No remote pendant.
• Rotary motor power switch.❖
• Manually operated control valve with hold.
84.2 38.3
ZE2208P_
VM32
3-way, 2-position
Manual Valve
10,000 psi
[700 bar]
Single-acting
hydraulic cylinders
or tools.
• One-button remote pendant.
• Pendant button starts & stops motor.
• Manually operated control valve.
91.1 41.3
ZE2308P_
VM33
3-way, 3-position
Tandem Center
Manual Valve
10,000 psi
[700 bar]
Single-acting
hydraulic cylinders
or tools.
• One-button remote pendant.
• Pendant button starts & stops motor.
• Manually operated control valve with hold.
91.9 41.7
ZE2408P_
VM43
4-way, 3-position
Tandem Center
Manual Valve
10,000 psi
[700 bar]
Double-acting
hydraulic cylinders
or tools.
• One-button remote pendant.
• Pendant button starts & stops motor.
• Manually operated control valve with hold.
91.9 41.7
ZE2308E_
VE33
3-way, 3-position
Tandem Center
Electric Solenoid Valve
10,000 psi
[700 bar]
Single-acting
hydraulic cylinders
or tools.
• Two-button remote pendant.
• Rocker type motor power switch (on/o/reset).
• Tandem center w/locking feature.
108.1 49.0
ZE2408E_
VE43
4-way, 3-position
Tandem Center
Electric Solenoid Valve
10,000 psi
[700 bar]
Double-acting
hydraulic cylinders
or tools.
• Two-button remote pendant.
• Rocker type motor power switch (on/o/reset).
• Electrically operated control valve.
• Tandem center w/locking feature.
108.1 49.0
ZW2108D_
VE32D
3-way, 2-position
Dump Valve
5,000 psi
[350 bar]
Single-acting
hydraulic cylinders
or workholding
devices.
• One-button remote pendant.
• Pendant button starts & stops motor.
• Electrically operated dump valve.
• For workholding applications.
94.8 43.0
ZW2708M_
VM22
3-way, 2-position
Manual Valve
5,000 psi
[350 bar]
Single-acting
hydraulic cylinders
or workholding
devices.
• No remote pendant.
• Rotary motor power switch.❖
• Manually operated control valve with hold.
• For workholding applications.
84.7 38.5
ZW2408M_
VM43
4-way, 3-position
Tandem Center
Manual Valve
5,000 psi
[350 bar]
Double-acting
hydraulic cylinders
or workholding
devices.
• No remote pendant.
• Rotary motor power switch.❖
• Manually operated control valve with hold.
• For workholding applications.
85.5 38.8
ZW2408E_
VEW43
4-way, 3-position
Float Center
Electric Solenoid Valve
5,000 psi
[350 bar]
Double-acting
hydraulic cylinders
or workholding
devices.
• Two-button remote pendant.
• Pendant buttons start & stop motor.
• Electrically operated control valve.
• For workholding applications.
99.0 44.9
Pump Type:
“M_” = Manual Valve “D_” = Dump Valve
“P_” = Manual Valve with Jog pendant
“E_” = Electric Solenoid Valve
❖Pump equipped with rocker type motor switch
if pressure switch option is ordered.
Note: This table contains model numbers for standard production ZE2 and ZW2-Series pumps. Model number endings (“_”) will vary,
depending on your pump’s power requirements and factory installed options. Refer to sections 3.4 and 3.5 for additional information.

L4555_a 9
3.2 Hydraulic Oil Requirements
Pump Series Reservoir Usable Oil Capacity Oil Type
gal l
ZE2 and ZW2 1.8 6.8 Enerpac HF
3.3 Pressure and Flow
Pump
Series
Pump
Type
Maximum
Hydraulic
Working
Pressure*
Flow Rate at Maximum Speed Relief Valve
Adjustment
Range
Hz
At 100 psi
[7 bar]
At 700 psi
[50 bar]
At 5000 psi
[350 bar]
At 10,000 psi
[700 bar]
psi bar in³/min l/min in³/min l/min in³/min l/min in³/min l/min psi bar
ZE2
1 Stage 10,000 700 50 52.5 0.86 34.2 0.56 17.1 0.28 16.7 0.27 1,000 -
10,000 69-700
60 63 1.0 41.0 0.7 20.5 0.34 20.0 0.33
2 Stage 10,000 700 50 166.7 2.7 158.3 2.6 17.1 0.28 16.7 0.27 1,000 -
10,000 69-700
60 200 3.3 190.0 3.1 20.5 0.34 20.0 0.33
ZW2
1 Stage 5,000 350 50 63.3 1.0 36.6 0.6 33.3 0.54 - - - - - - 1,000 -
5,000 69-350
60 76 1.2 44.0 0.7 40.0 0.65 - - - - - -
2 Stage 5,000 350 50 166.7 2.7 158.3 2.6 33.3 0.54 - - - - - - 1,000 -
5,000 69-350
60 200 3.3 190.0 3.1 40.0 0.65 - - - - - -
*Maximum system pressure of ZE-Series pump is limited to approximately 10,650 -10,950 psi [725-745 bar] by an internal safety relief valve.
Maximum system pressure of ZW-Series pump is limited to approximately 5,500 -5,800 psi [374-394 bar] by an internal safety relief valve.
3.4 Electrical Specifications
Model
Number
Ending
In:
Input Power
Specifications
Plug Type Motor
Speed
Motor Output
Rating
Operating Temp
Range *
Sound
Level
Lwa **
Volts
AC Phase Hz
hp kW ˚F ˚C dBA
B 115 1 50-60 NEMA 5-15 1725 (60 Hz)
1425 (50 Hz) 0.75 0.56 -20 to +122 -29 to +50 79
E 230 1 50-60 NEMA 6-15 1725 (60 Hz)
1425 (50 Hz) 0.75 0.56 -20 to +122 -29 to +50 79
I 230 1 50-60 Schuko CEE 7/7 1725 (60 Hz)
1425 (50 Hz) 0.75 0.56 -20 to +122 -29 to +50 79
*At 85% relative humidity. **Typical. Sound level will vary depending on pump speed and load.
3.5 Options
Model No.
Sux Option Description Notes:
-F Return Line Oil Filter Accessory Available on all models.
-G Hydraulic Pressure Gauge Accessory
0-15,000 psi [0-1000 bar] range
Available on all models.
Standard on pumps equipped with hydraulic pressure switch.
-P Hydraulic Pressure Switch Available only on models equipped
with VM-Series manual valves.
-S Single Stage Pump Element Available on all models.

10 L4555_a
3.6 Performance Charts
200
220
180
160
140
120
100
80
60
40
20
0
Oil Flow (in3/min) ▶
Pressure (psi) ▶
0
40
80
120
160
200
10000 2000 3000 4000 5,000
Oil Flow (in3/min) ▶
Pressure (psi) ▶
0
0
0,5
1,0
2,5
2,0
1,5
3,0
100 200 300 400 500 600 700
Oil Flow (l/min) ▶
Pressure (bar) ▶
0
0,5
1,0
1,5
2,0
2,5
3,0
500 100 150 200 250 300 350
Oil Flow (l/min) ▶
Pressure (bar) ▶
ZE2-SEriES (mEtric)
ZE2-SEriES (impErial)
Zw2-SEriES (mEtric)
Zw2-SEriES (impErial)

L4555_a 11
3.7 External Dimensions
A
B
C
D
E
F
G
HI
J
K
L
O
Item Dimension Item Dimension
inch mm inch mm
A16.3 414 J20.4 518
B18.8 478 K3.75 95
C19.3 491 L9.00 229
D9.5 240 Item ft m
E11.0 279 M20.0 6.0
F16.1 409 N6.5 2.0
G5.7 146 Item Thread Description
H15.5 393 OM8 x 1.25 thread size
0.25 inch [6.0 mm] thread depth
I16.9 430
Note: External dimensions are typical, but may vary slightly from pump to pump.
N
M
M
N
M
M

12 L4555_a
4.0 FEATURES AND COMPONENTS
VM22
VM32
VM33
VM43
VE43D
VEW43
VE33
VE43
Key:
1. Fan Vents
2. Electrical Enclosure
3. Rocker Power Switch
4. Electrical Enclosure
5. Rotary Power Switch
6. Circuit Breaker
7. Filter Replacement Indicator*
8. Hyd. Pressure Switch*
4
23
6
7
8
9
10
5
12
14
15
9. Hyd. Pressure Gauge**
10. Oil Filter*
11. Carrying Handle
12. Electric Motor
13. Hyd. Reservoir
14. Oil Fill Extension Tube***
15. Control Valve
16. Remote Pendant
* Optional equipment. ** Included on pumps
equipped with pressure switch. Optional on all
other pumps. *** ZW2 models only.
Note: Features and components will vary,
depending on pump model and optional
equipment ordered.
1
Figure 1: ZE2 and ZW2-Series Pumps
11
13
16

L4555_a 13
5.0 DESCRIPTION
The ZE2-Series pump is part of the proven Enerpac ZE-
Series product line and utilizes many of the same design
elements as the larger ZE-Series pumps.
Ideal for manufacturing or shop environments, multiple
valve and control options provide the flexibility to match
the pump to a wide range of pressing and punching
operations.
In addition, the companion ZW2-Series pump provides
similar benefits for machining center workholding
applications.
Major features include:
• 0.75 hp [0.56 kW] induction motor for long life and
quiet operation.
• 75 dBa sound level across pressure range.
• 1.8 gallon [6.8 liter] steel hydraulic oil reservoir
provides ample capacity for a wide range of
applications.
• Pump mounted rocker or rotary power switch for
simplified control of motor operation.*
• Low-voltage one or two button pendant provides
additional safety and convenience for the operator.*
• High-strength molded electrical enclosure protects
pump electronics and power supply from harsh
industrial environments.*
• High-efficiency Z-Class pump design offers higher
oil flow and by-pass pressure, cooler running and
less current draw than many comparable pumps.
• IP54 protection and isolation class for superior dust
and water protection.
*Standard equipment on selected models.
6.0 INSTALLATION AND
SETUP
6.1 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.
6.2 Air Flow
Install or position the pump to ensure that air flow around
the pump is unobstructed. Keep the motor fan vents
clean to ensure maximum cooling during operation. Be
sure that motor housing remains free of built-up dust and
dirt.
6.3 Oil Level
Always check the hydraulic reservoir oil level before
starting the pump. The reservoir is full when the oil level
is about halfway up the sight glass window, as shown in
Figure 2.
NOTICE
To prevent overfilling, always check oil level with
all connected cylinders or tools fully retracted.
If oil level is low, remove the oil fill plug (A) from the pump
cover plate and add oil as required. See Figure 3. Note
that ZW2 models include an oil fill extension tube which
is shown in Figure 1.
FULL
Figure 2: Oil Level Sight Glass
6.4 Hydraulic Reservoir Air Breather
A shipping plug (B) is installed in the pump coverplate.
See Figure 3.
Before using the pump, replace the shipping plug (B) with
the reservoir air breather (C) and adapter fitting (D). These
parts are shipped loose with the pump. Save the shipping
plug (B) for future use, such as when transporting the
pump.
C
B
D
A
C
B
D
A
Figure 3: Reservoir Oil Fill Plug and Air Breather

14 L4555_a
6.5 Hydraulic Connections
Apply 1-1⁄2 wraps of PTFE sealing tape or other suitable
sealant to the hydraulic hose fitting, leaving the first
complete thread free of tape or sealant as shown in
Figure 4.
Figure 4: Thread Sealant or Tape
Connections:
• Valve “A” and “B” ports are 3/8” NPTF.
• All valve auxiliary ports are 1/4” NPTF.
Hose installation:
• See valve body for port identification.
• Connect advance hose to valve port “A”.
• Connect retract hose to valve port “B” (if applicable).
• Connect pressure gauge to valve auxiliary port “GA”,
“GB” or “GP”.
NOTICE
“GA” measures “A” port pressure, “GB” measures
“B” port pressure, “GP” measures pump pressure down
stream of system check valve. Available auxiliary ports will
vary, depending on valve model.
6.6 Electrical Connections
THE PUMP IS FACTORY EQUIPPED WITH THE
COMMON ELECTRICAL PLUG FOR A GIVEN VOLTAGE,
ALTERING THE PLUG TYPE SHOULD ONLY BE DONE
BY A QUALIFIED ELECTRICIAN, ADHERING TO ALL
APPLICABLE LOCAL AND NATIONAL CODES.
• The disconnect and line circuit protection to be
provided by customer. Line circuit protection to
be 115% of motor full load current at maximum
pressure of application.
• For power rating information, refer to pump name
plate.
7.0 OPERATION
For all pumps equipped with VM-Series control valves, oil
flow is controlled by a manual valve. For pumps equipped
with VE-Series control valves, the valve is operated via
one or two electric solenoids, depending on model.
Depending on pump model, the motor is controlled
either by a pump mounted switch or by a corded remote
pendant.
Refer to sections 7.3, 7.4 and 7.5 for detailed operating
instructions.
NOTICE
The ZE2 and ZW2-Series pumps are designed
for intermittent duty only. Allow pump to cool periodically
after extended use at high pressure.
7.1 Max. Hydraulic Working Pressure
• ZE2 models are rated at a maximum hydraulic
working pressure of 10,000 psi [700 bar]. Maximum
system pressure is limited by an internal safety
relief valve to approximately 10,650-10,950 psi
[725-745 bar].
• ZW2 models are rated at a maximum hydraulic
working pressure of 5,000 psi [350 bar]. Maximum
system pressure is limited by an internal safety relief
valve to approximately 5,500 to 5,800 psi [375-394 bar].
WARNING Do not attempt to operate the pump at
above its rated maximum working pressure. Serious
personal injury, component failure and property damage
could occur.
WARNING Maximum working pressure should never be
higher than the lowest rated component in the system.
Refer to Section 1.1.1 for additional related hydraulic
safety information.
7.2 Initial Start-Up
WARNING Pumps equipped with optional pressure
switch: be certain that pump power switch is in the OFF
position to prevent accidental startup from occurring
when power is connected.
1. Check the oil level in the pump reservoir. Add oil if
necessary. Refer to Section 6.3.
2. Make sure that the reservoir air breather has been
installed. Refer to Section 6.4.
3. If there is no hydraulic pressure gauge in the system,
connect a suitable 0-15,000 psi [0-1000 bar] gauge.
4. If the pump is equipped with the optional pressure
switch, adjust the switch setting. Refer to
Section 7.6.
5. If the pump is equipped with a manual valve, be sure
that the control valve lever is in the proper position:
• VM22 and VM32: Retract position.
• VM33 and VM43: Neutral position.
6. Connect pump AC power cord to electrical outlet.
7. On pumps equipped with a rocker type power
switch, depress the bottom RESET section of
the switch to energize pump electrical components.
Refer to Section 7.3.2 for additional information.
8. For valve and motor operation instructions, refer to
sections 7.3, 7.4 and 7.5. When pump is first started,
check that motor fan rotates in the proper direction.
See arrow on fan shroud.
9. Before placing the pump into service, cycle the
cylinder or tool several times under no load to bleed
any trapped air from the hydraulic circuits. Air is
removed when cylinder or tool moves smoothly in
both directions.

L4555_a 15
7.3 Motor Power Switch
Many pump models are equipped with a pump-mounted
motor power switch. This can be either a rotary or rocker
type switch depending on pump model and configuration.
NOTICE
If your pump does not contain a pump mounted
motor power switch, then motor operation is controlled
only by the remote pendant.
7.3.1 Rotary Switch (on-off)
See Figure 5 for switch positions.
On models with a rotary switch, turn the knob clockwise
to the ON position to start the motor. Turn the knob
counter-clockwise to the OFF position to stop the motor.
OFF
ON
Figure 5: Rotary Switch
7.3.2 Rocker Switch (on-off-reset)
See Figure 6 for switch positions.
• Press the top ON section of the switch to start the
motor.
• Press the center OFF section of the switch to
stop the motor.
• In the event that a power interruption has occurred,
press and release the bottom RESET section of
the switch to reset the pump’s electrical circuits.
OFF
RESET
ON
Figure 6: Rocker Switch
When the pump is first connected to electrical power,
or if the electrical power has been interrupted and
reconnected, it will first be necessary to press the reset
section of the switch before operating the pump.
On models equipped with the optional pressure switch
the motor will not start unless the system hydraulic
pressure has dropped below the pressure setting of the
switch. Refer to instructions in Section 7.6 for additional
information.
WARNING
All users must be aware that pumps
equipped with the pressure switch option may start and
stop at any time when the rocker switch is in the ON
position. Refer to Section 7.6 for additional information.
7.4 Manual Control Valve Operation
WARNING
An unexpected component failure or
accidental activation of controls can allow a hydraulically
supported load to drop without warning. To prevent
serious personal injury, always support the load with
stands, blocking or other suitable mechanical supports
before placing hands, feet or other parts of your body
under the load.
7.4.1 VM22 and VM32 Control Valves
See Figure 7 for lever positions.
1. Advance 2. Retract
1
2
Figure 7: Lever Positions, VM22 & VM33
• Turn motor on or off using switch on pump.
• Jogging the valve lever from advance to retract
position with the motor off will relieve hydraulic
pressure.

16 L4555_a
7.4.2 VM33 and VM43 Control Valves
See Figure 8 for lever positions.
1. Advance
2. Retract
3. Neutral/Hold
2 1
3
Figure 8: Lever Positions, VM33 & VM43
• Turn motor on or off using switch on pump (standard
manual valve pumps) or button on pendant (jog
pumps).
• Motor must be operated in both advance and retract
directions for VM43 control valves.
• Jogging the valve lever from advance to retract
position with the motor off will relieve hydraulic
pressure.
NOTICE
If desired, lever location for the VM33 and VM43
control valves can be changed. The lever can be reinstalled
in any one of the three threaded holes at the top rotating
hub of the valve.
7.5 Remote Pendant Operation
WARNING An unexpected component failure or
accidental activation of controls can allow a hydraulically
supported load to drop without warning. To prevent
serious personal injury, always support the load with
stands, blocking or other suitable mechanical supports
before working on the load or placing hands, feet or other
parts of your body under the load.
7.5.1 ZE2-Series jog pumps equipped with
VM32, VM33 or VM43 manual control valves
• Place control valve lever in advance position. Press
and hold pendant on/advance button to start the
motor and advance the cylinder.
• Release pendant on/advance button to stop the
motor and hold the cylinder in a stationary position.
• Pumps with VM43 control valves only: Place control
valve lever in retract position. Press and hold
pendant on/advance button to start the motor and
retract the cylinder.
NOTICE
Pumps with VM32 and VM33 control valves: It is
not necessary to run the motor when retracting cylinder.
7.5.2 ZE2 and ZW2-Series dump pumps
equipped with VE32D dump valve
See Figure 9.
• Press and hold pendant on/advance button to start
the motor and advance the cylinder or tool.
• Release pendant on/advance button to stop the
motor and relieve hydraulic pressure. Cylinder or
tool will retract immediately.
ON/ADV
On/Advance Button
Figure 9: One Button Pendant
7.5.3 ZE2-Series pumps equipped with
VE33 or VE43 electric control valves
See Figure 10.
• Start motor using switch at rear of pump.
• Press and hold pendant advance button to advance
the cylinder.
• Press and hold pendant retract button to retract the
cylinder.
• Release either pendant button to hold the cylinder in
a stationary position. Motor will remain running after
button is released.
7.5.4 ZW2-Series pumps equipped with
VEW43 electric control valve
See Figure 10.
• Press and hold pendant advance button to start
motor and advance cylinder.
• Press and hold pendant retract button to start motor
and retract cylinder.
• Motor will stop when either pendant button is
released.
• The VEW43 control valve does NOT have a hydraulic
hold feature. When either pendant button is released,
hydraulic pressure will be relieved and the cylinder
will NOT be held stationary.

L4555_a 17
UP
DOWN
Advance Button (UP)
Retract Button (DOWN)
Figure 10: Two Button Pendant
7.6 PRESSURE SWITCH OPTION
7.6.1 Description
Selected ZE2 and ZW2-Series pumps are available with
an optional factory-installed pressure switch.
With this option, the pump motor will stop automatically
when the “A” port hydraulic pressure rises to a user-
defined setting.
The pump will restart automatically when “A” port
pressure drops to approximately 115 - 550 psi
[7.8 - 37.4 bar] below this setting.
All pumps ordered with the pressure switch option are
equipped with a three position rocker switch in place of
the rotary power switch. In addition, a hydraulic pressure
gauge is also included as standard equipment on these
pump versions.
WARNING
All users must be aware that pressure switch
equipped pumps can start and stop automatically at any
time when the pump power switch is in the ON position.
WARNING When using pumps equipped with pressure
switches, be certain that pump power switch is in the OFF
position before handling the load or before performing
any inspections or adjustments. Failure to observe these
precautions may result in possible death or serious
personal injury if pump restarts unexpectedly while
persons are making contact with the cylinder, tool or load.
NOTICE
Pressure switch setting must be adjusted by
user BEFORE pump is used. Refer to instructions in
Section 7.6.2.
7.6.2 Pressure Switch Setting Adjustment
1. Prepare pump for operation as described in
Section 7.2 of this manual.
2. Install a metal plug in the valve manifold “A” port. If
present, also install a metal plug in the manifold “B”
port.
Pressure
Switch Pressure
Gauge
Figure 11: Pressure Switch and Gauge
3. Before continuing, be sure that the pump pressure
relief valve setting is HIGHER than the desired
pressure switch setting. Refer to procedure in
Section 8.0.
4. Loosen pressure switch setscrew with a #10 Allen
wrench. See Figure 12.
5. Place the control valve lever in the advance (A)
position.
6. Start the pump motor. Allow system pressure to
build while observing the pressure gauge. Continue
running the pump until the desired pressure value is
shown on the gauge.
NOTICE
If motor does not start when pump power switch
is moved to the ON position, it may be necessary to
decrease the pressure switch setting.
–+
#10
Allen Head
Setscrew
Pressure
Setpoint
Adjustment
Figure 12: Pressure Switch Setting Adjustment
7. Using a flat blade screwdriver, turn pressure switch
adjustment screw clockwise to increase the switch
setting and counter-clockwise to decrease it. See
Figure 12. Verify that switch opens and pump motor
stops at the desired pressure setting.

18 L4555_a
8. Allow time for system pressure to drop after pump
has stopped. Verify that the pump motor restarts
after pressure has dropped (see NOTICE statement
following this step).
NOTICE
The range between the pump stop and restart
pressures is approximately 115 - 550 psi [7.8 - 37.4 bar]
and will vary depending on the pressure switch setting.
This range is not user-adjustable.
9. Stop the pump and fully relieve hydraulic pressure.
Then, restart the pump and allow pressure to build.
Check again that the pump stops at the desired
setpoint. Readjust switch pressure setting if
incorrect.
10. After verifying that the setting is correct, tighten the
pressure switch setscrew with a #10 Allen wrench to
lock in the setting.
7.7 Circuit Breakers
The pump is protected from electrical shorts and
overloads by a built-in circuit breaker. The type of circuit
breaker used will vary, depending on the pump model
and configuration.
NOTICE
If the circuit breaker trips, verify that the AC
power specifications are correct for the pump model
being used (refer to pump nameplate). If the circuit breaker
trips repeatedly, stop using the pump and take it to an
Enerpac Authorized Service Center for inspection and
repair.
7.7.1 Internal Circuit Breaker
All pumps equipped with a remote pendant contain a self
resetting internal circuit breaker.
In most cases, the circuit breaker will cool and reset
automatically within a few minutes after it has tripped.
Pumps with rocker style power switch only: To restore
power to the pump after the circuit breaker has cooled,
press and release the bottom RESET section of the
pump rocker switch. This action must be performed
whenever AC electrical power to the pump has been
interrupted for any reason.
7.7.2 Manual Reset Circuit Breaker
A manual reset circuit breaker is standard on all pumps
equipped with a rotary power switch.
The reset button is located on the top surface of the motor
switch enclosure.
After the circuit breaker trips, wait about 1 minute to allow
it to cool. Then, press the reset button.
Circuit Breaker
Reset Button
Figure 13: Circuit Breaker Reset Button
(pumps with rotary power switch only)
8.0 RELIEF VALVE
PRESSURE ADJUSTMENT
All ZE2 and ZW2-Series pumps are equipped with a user
adjustable relief valve.
Adjustment procedure details will vary, depending on the
operational characteristics of the pump and whether the
pump is equipped with an electric or manual valve.
NOTICE
To help ensure an accurate setting it is
recommended that the pump be operating as the setting
is adjusted. Some pump models have a separate power
on-off switch while others will start and stop automatically
as the pendant buttons are pressed and released. Refer
to Section 7.0 for detailed pump operation instructions.
Adjust the relief valve pressure setting as described in the
following steps:
1. Install a 0-15,000 psi [0-1000 bar] gauge in the “A” port.
2. Valves with “B” port: install a metal plug in the “B”
port (if not already installed).
3. Loosen the relief valve locknut to permit adjustment
of set screw.
4. On pumps equipped with an on-off switch, start the
pump motor. Allow time for the oil to warm.
5. Shift the control valve and build pressure in the
system at the “A” port. Observe the reading on the
pressure gauge.
6. Using a #10 Allen wrench, SLOWLY turn the
setscrew counter-clockwise to decrease pressure
and clockwise to increase pressure.
NOTICE
To obtain an accurate setting, decrease the
pressure to a point below the desired setting. Then,
SLOWLY increase the pressure until it reaches the desired
setting.
NOTICE
On valve models equipped with a built-in check
valve, it will be necessary to turn the relief valve setscrew
one full turn counter-clockwise before adjusting the
pressure upwards to the desired setting.

L4555_a 19
7. Tighten the locknut when the desired pressure
setting is reached.
8. Shift the control valve so that the system pressure
returns to 0 psi/bar.
9. Shift the control valve again and repressurize the
system. Observe the pressure gauge and verify that
the setting is correct.
10. Fully relieve hydraulic pressure before removing
gauge and plug (if installed in step 2) from ports.
Figure 14: Relief Valve - VM22
Relief valve body|
(DO NOT TURN)
Set screw
Locknut
“A”
Port
Figure 15: Relief Valve - VM32
Relief valve body
(DO NOT TURN)
Set screw
Locknut
“A”
Port
Figure 16: Relief Valve - VM, VE and VEW 33 & 43 Series
Relief valve body (DO NOT TURN)
Set screw
Locknut
“A”
Port
“B”
Port
(not present
on all models)
9.0 MAINTENANCE
Frequently inspect all system components for leaks or
damage. Repair or replace damaged components. Note
that electrical components, for example, the power cord,
may only be repaired or replaced by a qualified electrician,
adhering to all applicable local and national codes.
9.1 Check Oil Level
Check the reservoir oil level prior to start-up. If oil level is
low, remove the oil fill plug and add additional oil to the
reservoir as needed. Always be sure cylinders are fully
retracted before adding oil to the reservoir. See Figure 2
earlier in this manual for oil level diagram. See Figure 3 for
fill plug location.
9.2 Change Oil and Clean Reservoir
Frequently check oil condition for contamination by
comparing the color of the oil in the pump reservoir to
new unused Enerpac oil. Enerpac HF oil is a crisp blue
color.
As a general rule, completely drain and clean the reservoir
every 250 hours, or more frequently if used in dirty
environments.
NOTICE
This procedure requires that you remove the
pump from the reservoir. Work on a clean bench and
dispose of used oil according to local regulations.
1. Remove the reservoir drain plug and drain all oil from
the reservoir.
2. Clean and reinstall the drain plug. Drain plug is
magnetic and may contain metal particles which
must be removed before plug is reinstalled.
3. Remove the 13 bolts and copper gaskets securing
the coverplate to the reservoir.
4. Attach a suitable hoist and slings to the pump
carrying handle.
NOTICE
In the next step, be sure the pump is lifted evenly
and does not drop. As the pump is being lifted, have a
second person separate the pump coverplate from the
mating surface of the reservoir using a screwdriver or
other suitable tool.
5. Carefully lift the pump unit out of the reservoir. Use
caution not to damage the pump element or oil
intake filter.
6. Thoroughly clean the reservoir interior with a suitable
cleaning agent.
WARNING
When using cleaning agents and solvents,
always read, understand and follow manufacturer’s safety
and use instructions. Failure to observe this precaution
may result in serious personal injury.
7. Remove the oil intake filter. Pull it straight down to
separate it from the intake tube.
NOTICE
Replacement of the oil intake filter is strongly
recommended whenever the reservoir interior is cleaned.
However, if desired, an existing intake filter in good
condition can be back flushed and reinstalled.

20 L4555_a
1
2
3
6
7
8
4
5
4
Key:
1. Capscrews
2. Copper Gaskets
3. Pump & Coverplate Assy.
4. Oil Intake Tube
5. Oil Intake Filter
6. Reservoir Gasket
7. Hydraulic Reservoir
8. Oil Drain Plug
Figure 17: Reservoir Inspection and Oil Change