Arconic 918 Series, Instruction Manual

Page: 4 / 28

4
918 series Powerig Hydraulic Units (HK786)
GENERAL
The models 918 and 918-5 HUCK Powerig
®
Hydraulic Units
are electrically operated hydraulic power sources designed to
operate Huck Installation Equipment.
Model 918 can operate two pieces of equipment
simultaneously and independently of each other. The units
are semi-portable and can be moved with a fork-lift truck.
Model 918-5 can operate three tools simultaneously and
independently of each other. The 918-5 is the basic 918 with
an additional combination valve bracket assembly mounted
to the reservoir.
Figures 1 and 2 show features of model 918 and 918-5
POWERIG Hydraulic Units and identify main components.
Hydraulic pressure is developed by an axial piston pump
driven by an electric motor. Hydraulic pressure from the
pump is directed to PULL and RETURN ports by combination
valves controlled from the installation equipment by relays
and solenoids.
Hydraulic fluid is stored in the 22 gallon (
83.3 liters
) reservoir
which serves as a base for motor and pump. A 70 micron
strainer in the suction line, and a 10 micron filter in the
RETURN line, assure clean, filtered hydraulic fluid for the
hydraulic system. A filler-strainer is provided for adding
hydraulic fluid. However, any hydraulic fluid that is added to
the reservoir must be filtered by a 10 micron (or better) filter.
Before returning to the reservoir, circulating hydraulic fluid
passes through the cooler where the temperature of fluid is
lowered to proper operating level. A fan, attached to the rear
shaft extension of the electric motor, aids in dissipating heat
from the cooler.
*Note: Kits are available for conversion from 440 to 220
volts and conversion from 220 to 440 volts.
ELECTRICAL CONTROL PANEL
The electrical control panel contains two compartments:
Disconnect Compartment and the Control/Transformer
Compartment . The Disconnect Compartment contains a
three-pole main disconnect switch, three main line fuses, two
transformer fuses, and terminals for power cable connection.
The Control/Transformer Compartment contains two
transformers (one is to convert to 110 and the other is
to convert to 24 volt current), motor contact with three
overload relays (heaters), multi-contact relays for control
circuit, START and STOP buttons, 24 volt and 110 volt circuit
breakers, bases (sockets) for plugging in the tool control
cords, and power cable entrance connector.
INPUT POWER CABLE
A four-conductor power cable, including ground conductor, is
used to connect the Powerig to the electrical power source.
The cable is NOT shipped with unit. User must furnish power
cable in accordance with his particular requirements. Only
a qualified electrician should install power cable. (See the
First-time Start-up procedure in the Preparation for Use
section.)
The standard 440-volt unit can be converted to 220-volt
operation with conversion kit 918-220KIT .
The 220-volt unit can be converted to 440-volt operation with
conversion kit 918-440KIT .
COMBINATION VALVE
Each combination valve contains a Four-way solenoid-
operated directional valve , Pressure Relief Valve , and Idler
Valve .
The Four-way Valve is controlled by a tool trigger through a
relay and solenoid, and directs hydraulic fluid under pressure
to PULL or RETURN hoses connected to installation tool, or
other equipment.
The Pressure Relief Valve protects the POWERIG and
installation tools from excessive pressure during the
pull
cycle. The valve is factory preset to 5600 psi (
386 BAR
).
The Idler Valve (Figure 7) protects the POWERIG and
installation tools from excessive pressure during the
return
cycle. The Idler Valve is factory preset to provide 2800 psi
(
193 BAR
) return pressure and approximately 200 psi (
14
BAR
) idling pressure.
NOTE: Various systems require different output pressures.
See Checking & Adjusting Pressures before using the
POWERIG Hydraulic Unit.
Description