4
940 Powerig®
(HK496)
CAUTION
PULL
PRESSURE
CAUTION
RETURN
PRESSURE
115V AC
Electrical
Enclosure
Pilot
Valve
Quick
Disconnect
Coupler
Quick
Disconnect
Coupler
Four-Way
Directional
Valve
Reservoir
Power
Cord
High Pressure
Relief Valve
Motor
and
Pump
}
Figure 1
Figures 1 & 5
Model 940 Powerig
®
is a portable, electrically operated
power source designed to operate all Huck hydraulic
installation equipment excluding Huck-Spin
®
tools. It
operates on 115 volt AC, 50-60 Hz, one-phase electrical
power. The power cord is a 10/3 SJTO cord with a NEMA
L5-30 plug. The motor is rated at 115V, 50/60Hertz,
25A. An electrical enclosure contains a motor contact,
transformer, relay and circuit breaker. Hydraulic pressure
occurs by a two-stage, gear-piston pump driven by a 1 1/8
horsepower universal electric motor. Pressurized fluid is
directed by a four-way directional valve to either the PULL
or RETURN port of the installation equipment. The four-
way directional valve is operated by a 24 volt AC control
circuit. The high pressure relief valve controls PULL
pressure (maximum pressure of the unit) and is adjustable
by the operator. An internal relief valve is preset at
the factory to protect the Operator and equipment.
The internal relief is not adjustable by the operator. A
pressure switch controls RETURN pressure and turns off
the Powerig at the end of an installation cycle. Pressures
are adjustable to match Huck equipment being used. See
applicable tool instruction manual for pressure settings for
other Huck installation equipment. Hydraulic fluid is stored
in the reservoir which also serves as the base. Remove
the filler cap/dipstick to check fluid level and to add fluid.
Hydraulic quick disconnect couplers are furnished for
connecting hoses from installation equipment.
Description
FIGURE 2
Pressure switch (PS) contacts are normally closed.
Increasing pressure opens contacts. When the
tool trigger switch is depressed, 24 volts AC is
applied between relay terminals CR13 and CR14
activating the relay coil and closing two sets
of contacts, CR9-CR5 and CR12-CRS. Closing
contacts CR9-CR5 starts the motor. Closing
contacts CR12-CR8 activates the solenoid coil
of the pilot valve. The pilot valve shifts the
directional valve spools.
Pressurized fluid is directed to the PULL pressure
port of the installation equipment. When the tool
trigger switch is released, the relay contacts open.
The solenoid coil is deactivated and the spring
return of the pilot valve shifts the directional
valve spools. Pressurized fluid is directed to
the RETURN pressure port of the installation
equipment.
The motor contact is held closed until the preset
RETURN pressure is reached and pressure switch
(PS) contacts open. The motor turns off, the
pressure drops, and pressure switch returns to the
closed (normal) position.
SERVICE
Introduction of foreign material into Hydraulic Unit will result
in poor performance and down time for repair. To avoid this:
Clean the area around the filler cap before adding hydraulic
fluid, always use a clean funnel with a filter, keep quick-
disconnect couplers clean by keeping them off the floor, ans
wipe off quick-disconnect couplers before connecting them.
BEFORE USE
Fill the reservoir with hydraulic fluid, approximately 2.6
gallons (9.8 liters), until the fluid level is between the grooves
of the dipstick.
The 940 Powerig is shipped without hydraulic fluid.
Principle of Operation
Preparation for Use
Figure 2
Electrical Schematic Diagram
