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.
WARNING: BE SURE SETUP IS STABLE BEFORE
LIFTING LOAD. Cylinders should be placed on a fl at
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.
Avoid situations where loads are not directly centered on
the
cylinder
plunger.
considerable strain on cylinders and plungers. In
addition, the load may slip or fall, causing potentially dangerous
results.
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 qualifi ed 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 fi t properly and withstand high loads.
WARNING: Do not use electric pumps in an explosive
atmosphere. Adhere to all local and national electrical
codes. A qualifi ed electrician must do installation and
modifi cation.
WARNING:
Start the pump with the valve in the
neutral position to prevent accidental cylinder
operation. Keep hands clear of moving parts and
pressurized hoses.
WARNING: These pumps have internal factory
adjusted relief valves, which must not be repaired or
adjusted except by an Authorized Enerpac Service
Center.
CAUTION: To prevent damage to pump electric
motor, check specifi cations. Use of incorrect power
source will damage the motor.
3.0 SPECIFICATIONS
3.1 Performance Chart (See Performance Chart below)
3.2 Flow Charts (See Figure 1)
▼ Z U4 PERFORMANCE CHART
Motor
Size
100 psi
(hp)
1.7*
700
*Actual power consumption depends on the application. See Figure 1.
Off -center
loads
produce
Output Flow Rate
in 3 /min
700 psi
5,000 psi
10,000 psi
535
76
Figure 1
700
600
500
400
300
200
100
0 0
0
1000
2000
Current (Amps)
Flow (in3/min)
4.0 INSTALLATION
Install or position the pump to ensure that air fl ow around the
motor and pump is unobstructed. Keep the motor clean to
ensure maximum cooling during operation.
4.1 Oil Fill Plug and Reservoir Air Breather
(See Figure 2)
The oil fi ll plug (A) is located on the left side of the pump coverplate.
Before using the pump, check oil level as described in Section 4.4.
Add oil if required.
A shipping plug (B) is installed on the right side of the pump
coverplate. Before using the pump, replace the shipping plug (B)
with the reservoir air breather (C) and adapter fi tting (D). These
parts are shipped loose with the pump.
Figure 2, Oil Fill Plug and Reservoir Air Breather
4.2 Pump Mounting
Refer to Figure 3 for mounting dimensions to secure the pump to
a fi xed surface.
Motor Electrical
Specifi cations
(Volts-Ph-Hz)
60
115-1-50/60
230-1-50/60
2
Flow and Current vs. Pressure
3000
4000 5000
600
7000
8000
B
A
Sound
Relief Valve
Adjustment Range
Level
(dBA)
85-90
1,000-10,000
25
20
15
10
5
0
9000 10,000
Pressure
C
D
(psi)