WARNING: Only use hydraulic torque wrenches in a
coupled system. Never use a torque wrench with
unconnected couplers. If the torque wrench becomes
extremely overloaded, components can fail catastrophically causing
severe personal injury.
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: 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.
WARNING: 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 bottom of page)
3.2 Flow Chart (see Figure 1):
Flow and current vs. Pressure
700
600
500
400
300
200
100
0 0
0
1000
2000
3000
4000 5000
Current (Amps)
Flow (in
3
/min)
Figure 1, Flow Chart
▼ ZU4 PERFORMANCE CHART
Motor
Size
(hp)
100 psi
1.7*
700
*Actual power consumption depends on the application. See Figure 1.
25
20
15
10
5
0
6000
7000
8000
9000
10,000
11,600
Pressure (psi)
Output Flow Rate
3
in
/min
700 psi
5,000 psi
535
76
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 Reservoir Breather Cap (See Figure 2)
A shipping plug is installed in the breather port on the top of
the reservoir. Before using the pump, replace the shipping plug
(C) with the breather cap (A) and adapter fi tting (B). Note: The
breather port is separate from the oil fi ll port. The oil fi ll port (D)
uses an SAE #10 plug.
Figure 2, ZU4 Breather Installation
4.2 Pump Mounting (See Figure 3)
Refer to Figure 3 for mounting dimensions to secure the pump
to a fi xed surface.
1-2 Gal. (4-8 L)
in. (mm)
A
3.75 (95)
B
9.00 (229)
tapped holes,
C
M8 x 1.25
0.25 (6) deep
(Note: Reservoir viewed from below)
A
Figure 3, Mounting Dimensions
Motor Electrical
Specifi cations
10,000 psi
(Volts-Ph-Hz)
115-1-50/60
60
230-1-50/60
2
A
B
2.5 Gal. (10 L)
5 Gal. (20 L)
in. (mm)
in. (mm)
11.0 (279)
15.6 (396)
12.0 (305)
12.0 (305)
Ø 0.34 (8.6) diameter through holes
C
B
Sound
Relief Valve
Level
Adjustment Range
(dBA)
1,400-10,000 for "Q" version
85-90
1,400-11,600 for "E" version
C
D
10 Gal. (40 L)
in. (mm)
18.9 (480)
12.0 (305)
(psi)