11
Bulletin HY22-3220A/US
Instruction Manual
550 Series Hydraulic Power Units
Safe Operating Procedures
THREE PHASE MOTORS
230V
460V
MODEL
RPM
WATTS
HP
FLA
FLA
TD
1725
375
0.50
1.84
0.92
TF
1725
560
0.75
2.60
1.30
TK
1725
750
1.00
3.40
1.70
TO
1725
1125
1.50
4.60
2.30
TR
1725
1500
2.00
6.00
3.00
TT
3450
375
0.50
1.80
0.90
TU
3450
560
0.75
2.40
1.20
TW
3450
750
1.00
3.20
1.60
TX
3450
1125
1.50
4.40
2.20
TY
3450
1500
2.00
5.60
2.80
TH
3450
2240
3.00
8.00
4.00
SA or SW circuits
Power units with circuit ‘SA’ or ‘SW’ have two ports, marked
P and T. Ports are SAE-6 (9/16-18). With the reservoir filled,
jog the electric motor to produce flow from the P port. If no oil
shows ensure the rotation is correct (clockwise from motor fan
end) and the reservoir is full of oil. Once oil shows, proceed
with connecting the power unit to your circuit for operation.
S(1-8) or P(1-8) circuits
Power units with circuits ‘S(1-8)’ or ‘P(1-8)’ have two ports,
marked P and T, but the T port is plugged at the factory. Ports
are SAE-6 (9/16-18). With the reservoir filled, jog the electric
motor to produce flow from the P port. If no oil shows ensure
the rotation is correct (clockwise from motor fan end) and the
reservoir is full of oil. If the solenoid valve is normally open,
energize the solenoid to close the valve. If the solenoid valve
is normally closed, ensure the valve is not energized. Once oil
shows at the P port, proceed with connecting the power unit to
your circuit for operation.
D0 or D1 circuits
Power units with circuits D0 or D1 have two JIC –6 male
extension fittings for outlet ports, one on each side of the power
unit located just behind the NG6/D03 valve(s). Connect the
NG6/D03 valve solenoid(s) using the input voltage specified on
the valve cover and energize one solenoid. With the reservoir
filled, jog the electric motor and oil should appear at one of the
JIC-6 male extension fittings. If oil does not appear, check
that the valve is energized and also that the motor rotation
is clockwise looking at the fan end of the motor. Once oil
appears, proceed with connecting the power unit to your circuit
for operation.
550 Series Power Units are factory assembled and tested at
the pressure setting given in the ordering model code. Should
slight adjustments be required, a 3/16 in Allen wrench is needed
to turn the relief valve screw, after loosening the 11/16 in lock
nut. To increase pressure turn the relief valve screw clockwise
(when facing the relief valve). Adjustments are approximately
59 bar (850 psi) per full turn of the screw. When adjustment is
complete, retighten the lock nut to 13.5 to 19 Nm (10-14 ft-lbs)
torque.
Functional testing is considered complete when the 550 Series
Power Unit successfully extends and/or retracts the system
actuator(s).
Additional Testing
If required, any tests for radiated and conducted emissions
should be performed in accordance with the Electromagnetic
Compatibility (EMC) Generic Emissions standards for
environments appropriate to the end use product to confirm
compliance with the EMC Directive.
If required, any tests for radiated and conducted immunity
should be performed in accordance with the Electromagnetic
Compatibility (EMC) Generic Immunity standards for
environments appropriate to the end use product to confirm
compliance with the EMC Directive.
The standard 60 Hz motors used in the 550 Series Power
Units are not certified per the Low Voltage Directive. However,
motors which are selected specifically for use in the European
Union will meet the Low Voltage Directive.
Special Tools
All normal service and maintenance on standard 550 Series
Power Units can be accomplished with standard hand tools. No
special tools are required.
Safe Operating Procedures
Should a failure of the electrical power supply occur,
power should not be returned to these power units without
a conscious action by the operator.
550 Series Power Units, when operating with a motor speed of
3450 rpm, will most likely generate noise in excess of 70 dBA
but below 80 dBA. When working around this noise level it is
recommended that appropriate hearing protection be worn.
550 Series Power Units, when operating with a motor speed of
1725 rpm, will likely generate a noise level in the 65 dBA range.
If noise levels should exceed 80 dBA, it is necessary to take
measures to reduce noise. This is normally achieved by placing
the power unit/machinery in an acoustically lined enclosure.
Standard 550 Series Power Units include AC motors from
370 W (.50 HP) to 2.2 kW (3 HP) in voltages of 115/208-230
and 230/460 VAC at 60 Hz. Using voltages other than those
specified on the electric motor nameplate may reduce the life
expectancy and the safety of these units cannot be guaranteed.
Directional control valves and solenoid cartridge valves are
voltage specific and must be operated at the voltage stated on
the nameplates or coils.
Standard operating temperature range is -7 to +60°C (+20 to
+140°F).
550 Series Power Units are designed for continuous duty.
However, do not operate the power unit with pump flow going
over the relief valve for any length of time; this creates excessive
heat. It is recommended that for any applications requiring a
maintained pressure, a circuit be selected which incorporates a
load holding check valve(s). Examples of these circuits would be
the D1, using the Manapak double pilot operated check valves,
or a two position/two way cartridge valve with included check
valve. Should an operating condition cause the oil temperature
to reach the maximum safe temperature of the selected
hydraulic fluid, it is required that the duty cycle be modified or
external cooling be used, such as a fan circulating air around
the reservoir. Under no circumstances should the system fluid
ever exceed the maximum recommended temperature of 60°C
(140°F).
Parker Hannifin
HPS Division
New Hope, MN 55428 USA
