Parker Oildyne 550 Series User manual

Oildyne 550 Series
Hydraulic Power Units
Bulletin HY22-3220A/US
Instruction Manual
Effective: August 01, 2011
416181

2
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Contents
FAILURE OR IMPROPER SELECTION OR IMPROPER USE OF THE PRODUCTS DESCRIBED HEREIN OR RELATED ITEMS CAN CAUSE
DEATH, PERSONAL INJURY AND PROPERTY DAMAGE.
This document and other information from Parker-Hannin Corporation, its subsidiaries and authorized distributors provide product
or system options for further investigation by users having technical expertise. The user, through its own analysis and testing, is solely
responsible for making the nal selection of the system and components and assuring that all performance, endurance, maintenance,
safety and warning requirements of the application are met. The user must analyze all aspects of the application, follow applicable industry
standards, and follow the information concerning the product in the current product catalog and in any other materials provided from
Parker or its subsidiaries or authorized distributors.
To the extent that Parker or its subsidiaries or authorized distributors provide component or system options based upon data or
specications provided by the user, the user is responsible for determining that such data and specications are suitable and sufcient for
all applications and reasonably foreseeable uses of the components or systems.
Offer of Sale
Please contact your Parker representation for a detailed ’Offer of Sale’.
WARNING – USER RESPONSIBILITY
Table of Contents Page
Introduction 3
Explanation of Warning Labels 3
Description 3
Preparation for Use 9
Installation 9
Start-Up Procedures 10
Special Tools 11
Safe Operating Procedures 11
Operation 14
Maintenance 14
Recommended Spare Parts 17
Troubleshooting 17
Appendix 18
Declaration of Conformity 19
1. Name & address of manufacturer
2. WARNING - see page 3
3. WARNING - see page 3
4. CE Mark (if applicable)
5. Year of product manufacture (if CE marked)
6. Product type
7. Part number
8. Unique identier/serial number
9. Pressure
10. Flow rate
11. Motor voltage
12. Motor rated watts
13. Motor rated horsepower
14. Motor Amperage draw
15. Motor phase
16. Motor Hz
New Hope, MN 55428 USA
555 646608 102345678A
999 9999 9.99 9.99
XXX/XXX X.XX XX/XX XX/XXXXXX WHP AHz
bar( psi)
VAC
Parker Hannifin - Oildyne Division
5520 Hwy 169 North
GPM LPM
11
Ф
New Hope, MN 55428 USA
555 646608 102345678A
WHP AHz
bar( psi)
VAC
Parker Hannifin - Oildyne Division
5520 Hwy 169 North
GPM LPM
11
Ф
How to read the label on your 550 Series Power Unit
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

3
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Introduction and Description
Introduction
This manual provides descriptive operation and maintenance
instructions for 550 Series Power Units manufactured by the
Parker Hannin Corporation, Oildyne Division. Any additional
information may be obtained from Parker by referencing the
unit part number stamped on the product label or by contacting
your local authorized Parker Distributor.
Some of the Information in this manual may not apply to all
power units. Information about custom units may require service
and application information from other sources.
Warning
This Instruction Manual should be read in its entirety and
understood prior to installing and operating the Oildyne
550 Series Hydraulic Power Units.
It is imperative that personnel involved in the installation,
service, and operation of the Oildyne units be familiar with
how the equipment is to be used. They should be aware of
the limitations of the system and its component parts, and
have knowledge of good hydraulic practices in terms of safety,
installation, and maintenance.
Explanation of Warning Labels
The following labels will be used in this Instruction Manual and
on all applicable Oildyne products.
Description
The 550 Series Hydraulic Power Unit consists of an AC electric
motor, xed displacement gear pump, relief valve and reservoir
with options for different circuit types incorporating NG6/D03
valves or 2 position/2 way cartridge valves. The gear pump is
driven through a coupling located between the electric motor
drive shaft and the pump drive shaft.
For dimensional drawings please see pages 4 to 6.
Two basic versions are available, either with SAE-6 (9/16-18)
ports for the P and T connections, or with JIC-6 male extension
tube ttings for use with the NG6/D03 version of the adapter.
For hydraulic schematics, please see pages 7 and 8.
The life expectancy of Parker Oildyne power units is directly tied
to the frequency of use, the product in which it is incorporated
and the application.
Shipping weights for the 550 Series Power Units range from
14.5 kg (36 lbs) to 50 kg (110 lbs).
The 550 Series Power Units are intended to be used in a variety
of applications, specied by the customer, where pressurized
hydraulic uid is needed to move an actuator(s), charge an
accumulator(s) or supply test equipment.
Pressure Capability (depends on pump/motor combination):
• Up to 207 bar (3000 psi) maximum
Flow Output (depends on pump/motor combination):
• At 1725 rpm: .95 – 5.6 lpm (.25 – 1.5 gpm)
• At 3450 rpm: 1.9 – 11.4 lpm (.5 – 3 gpm)
Motor Specications:
• .37 – 2.2 kW (.5 – 3 HP)
• 56C with base
• TEFC
Voltages (standard motors are 60 Hz):
• Single phase: 115/208-230 VAC
• Three phase: 208-230/460 VAC
50 Hz motors are available upon request.
Acceptable Fluids:
• Standard Automatic Transmission Fluid (ATF)
• Most mineral based hydraulic uids
Viscosity range: 32-64 cSt (150-300 SSU) at 38°C (100°F)
Please contact Parker Oildyne to discuss any alternate uids.
Parker Oildyne takes no responsibility if unapproved
alternative fluids are used.
Temperature Ranges:
Operating: -7 to 60°C (+20 to 140°F)
Storage: -10 to 60°C (+14 to 140°F)
550 Series Power Units should be installed indoors in a clean
environment.
550 Series Power Units are designed for a continuous duty.
However, do not operate the power unit with pump ow 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.
There may be hydraulic liquid under
pressure. Do not open unit or break pipe
connections until hydraulic pressure has
been released.
Be careful; take precautions; examine
instructions before operation.
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

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Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Dimensions
Dimensions
1/2 GAL
(2 LITER)
191.8
7.55()
1 GAL
251.5
9.90()
1-1/2 GAL
311.1
12.25( )
2-1/2 GAL
430.5
16.95()
24.1
0.95()
24.1
0.95()
158.9
6.25()
134.6
(5.30)
T
P
9/16-18 UNF-2B
SAE-6 STR THD
O-RING PORTS
215.9
8.50()
231.9
9.13()
25.8
1.02()
51.3
2.02()
MOTOR HEIGH
T
237.2-299.7
(9.34-11.80)
88.9
3.50()
87.4
3.44()
171.5
6.75()
135.1
(5.32)
SINGLE PHASE
ONLY
FILLER/BREATHER
101.6-169.1
(4.00-6.50)
65.0
2.56()
Ø182.1 MAX
(7.17)
165.1
6.50()
76.2
3.00()
62.0
2.44()
62.0
2.44()
4X 8.6 (.34) SLOT
(4 LITER)
(5.6 LITER)
(9.5 LITER)
Note: All dimensions in mm (inches).
THIRD ANGLE
PROJECTION
550 Series shown with P and T ports and plastic reservoir
Motor foot dimensions are common to
all 550 Series electric motors
Note: When mounted in the horizontal configuration
the 21/2gallon plastic reservoir must be supported.
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

5
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Note: When mounted in the horizontal configuration
the 21/2gallon plastic reservoir must be supported.
Dimensions
Dimensions
THIRD ANGLE
PROJECTION
177.8
(7.00)
1/2 GAL
(2 LITER)
134.6
(5.30)
24.1
(0.95)
TWO WAY VALVE
(OPTIONAL)
LEADS 18GA
609.6 (24.00) LONG
STRIPPED ENDS
9/16-18 UNF-2B
SAE-6 STR THD
O-RING PORTS
PT
304.8
(12.00)
1 GAL
(4 LITER)
406.4
(16.00)
1-1/2 GAL
(5.6 LITER)
101.3
(3.99)
24.1
(0.95)
140.4
(5.53)
MOTOR HEIGHT
237.2-299.7
(9.34-11.80)
SINGLE PHASE
ONLY
FILLER/BREATHER
RELIEF VALVE
RETURN FLOW CONTROL
(OPTIONAL)
135.1
(5.32)
88.9
(3.50)
25.8
(1.02)
51.3
(2.02)
98.0
(3.86)
Note: All dimensions in mm (inches).
550 Series shown with optional solenoid
2-way valve and steel reservoirs
THIRD ANGLE
PROJECTION
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

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Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Dimensions
Dimensions
Note: All dimensions in mm (inches).
THIRD ANGLE
PROJECTION
4X Ø
RESERVOIR MNT HOLES
9.5
.38()
387.4
15.25()
362
14.25()
50.8
2.00()
34.9
1.38()
34.9
1.38()
50.8
2.00(
254
(10.00)
)304.8
(12.00)
254
10.00()
25.8
1.02()
Ø
171.5
6.75()
136.7
5.38()
304.8
12.00()
598.8
23.58()
311.3
12.26()
51.3
2.02()
131.8
5.19()
63.6
2.51()
58.6
2.31()
231.6
9.12()
66.8
2.63()
82.6
3.25()
39.9
1.57()
93.5
3.68()
215.9
8.50()
181
7.13()
NOTE
1 DIMENSIONS ARE REFERENCE ONLY
GAUGE PORT LOCATION
SAE-6 STR THD O-RING PORT
9/16-18 UNF-2B
2X 9/16-18 UNF-2A
PORT B
PORT A
FLARE TUBE END
(JIC-6)
FILLER/BREATHER
550 Series shown with 19 liter (5 gallon) steel reservoir and NG6/D03 valves
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

7
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Power Unit Schematics
Hydraulic Schematics
PT
PT
PT
PT
“SA” CIRCUIT “SW” CIRCUIT
“S1-S4, P1-P4” CIRCUITS “S5-S8, P5-P8” CIRCUITS
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

8
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Power Unit Schematics
PT
PT
AB
PT
AB
AB
PT
“S1-S4, P1-P4” CIRCUITS WITH
PRESSURE COMPENSATED FLOW
CONTROL F1 OR F2
“S5-S8, P5-P8” CIRCUITS WITH
PRESSURE COMPENSATED FLOW
CONTROL F1 OR F2
“D0” CIRCUIT (D03 VALVE TO BE SELECTED) “D1” CIRCUIT INCLUDES MANAPAK DUAL P0
CHECK VALVE (D03 VALVE TO BE SELECTED)
AB
PT
CLOSED CENTER
AB
PT
OPEN CENTER
AB
PT
AB
PT
FLOAT CENTER
TANDEM CENTER
AB
PT
SINGLE SOLENOID
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

9
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Installation
Suitable applications for the 550 Series Power Units would be
those whose requirements fall within the operating parameters
given above.
Some examples of abnormal uses of this unit would include:
• Use of unit with higher pressure than that for which it was
rated
• Use requiring continuous running of the pump ow over the
pressure relief valve
• Use with higher or lower voltage than required for optimal
use
• Use in a mounting orientation other than that for which it was
designed
• Use of uids not recommended for use
Parker Hannin Corporation takes no responsibility for safety
of any unit if it is not used for the intended purposes detailed in
this Instruction Manual.
Preparation for Use
Unpacking and Checking
All units were carefully packed, in containers or boxes, and may
or may not be on skids. In any case, do not remove anything
from the skid or any packaging until it has been carefully
checked for damage that may have occurred in transit. Report
all damage immediately to the carrier and send a copy to the
vendor.
All open ports on the power unit were plugged at the factory to
prevent the entry of contamination. These plugs must not be
removed until just before piping connections are made to the
unit.
Storage
If the unit is not going to be installed immediately, it should be
stored indoors, covered with waterproof sheet, and all open
ports kept plugged. If long term storage is expected (6 months
or more) we recommend lling the reservoir completely with
clean hydraulic uid to prevent the entry of moisture.
Removing from packaging
The mass of 550 Series Power Units is unequally distributed
in the assembly. The electric motors are the ‘heavy ends’
of the power units with the standard motors alone weighing
between 8.3 kg (18.2 lbs) and 22 kg (48.4 lbs). It is strongly
recommended that two people carry and move these power
units. The exception is the 550 Series Power Unit using the 19
liter (5 gallon) rectangular steel reservoir. These are assembled
with the electric motor above the reservoir. 550 Series Power
Units with the 19 liter (5 gallon) rectangular steel reservoir should
be removed from the skid by wrapping a heavy duty nylon strap
around the base of the motor mounting feet. This strap should
be rmly secured to the lift truck forks when unit is lifted.
Installation
Locating Power Unit
The unit should preferably be installed indoors in a clean, dry
environment with an ambient temperature of 15 to 38°C (60 to
100°F).
Parker Oildyne products should not be installed where they are
at risk of objects falling from overhead or where there is any risk
of impact with external objects.
Mounting the power unit
The majority of 550 Series Power Units are complete
assemblies. A small portion is created without the electric
motors, allowing the customer to purchase and install alternate
motors. There is a ‘C-face’ kit available, Oildyne part number
775679, which allows a standard ‘56C with base’ motor to be
mounted to the 550 Series. This kit includes a spacer plate,
shaft adapter with set screw, threaded studs and nuts – all the
components needed to mount the motor to the power unit. See
the Appendix on page 18 for installation instructions using this
C face kit.
550 Series Power Units are assembled for mounting horizontally
(ports or D03 valve facing UP) or vertically (motor above the
reservoir), except for power units using the 19 liter (5 gallon)
reservoir, which are designed only for vertical installation (motor
above the reservoir).
For port locations see pages 4 - 6.
Mount the power unit securely through the provided slots in
the motor foot. See page 4 for the motor foot details. Power
units with the 19 liter (5 gallon) reservoir will use the reservoir
base anges to mount to the customer determined location.
See page 6 for reservoir mounting ange details. Mounting
bolt torque values will be determined by the type of fastener
selected by the customer. It is strongly recommended that
the surface to which the power unit is mounted is bonded
to earth to provide proper grounding in the event of a
lightning strike.
Electrical Service Connections
Connect the motor to the power source following good
practices as outlined in the national electric codes and any local
codes which may apply. Verify that the available voltage is the
same as the voltage identied on the label. Most AC motors
have dual voltage ratings, so verify that the leads in the conduit
box have been connected together as dened on the motor
nameplate to match the facility power source available. Ensure
the wiring connections will provide clockwise motor rotation,
when looking at the fan end.
Standard NEMA motor connections are shown here:
Single phase - 115/208/230 VAC
1 3 5 2 4 8
LINE LINE
1 Ø, Low Voltage
TAPE LINE
2 3 5 4 81
LINE
1 Ø, High Voltage
Three phase - 230/460 VAC
If the 3 phase connection shown results in a counter clockwise
rotation (from the fan end), interchange any two of the three L1,
L2, L3 connections to reverse the motor rotation.
3 Ø, Low Voltage
TAPEL 3
4 5 63 9
L 1
1 7 2 8
L 2
3 Ø, High Voltage
1
L 1
2
L 2
3
L 3
4 7
TAPE TAPE
5 8
TAPE
6 9
Customer supplied controls will include motor starters and valve
operators (for NG6/D03 and solenoid cartridge valves).
Supply and Return Connections
550 Series Power Units incorporating an NG6/D03 valve
surface, regardless of the valve being supplied by Oildyne or
not, will include two JIC-6 (9/16-18) extensions ttings onto
which the A and B actuator control connections can be made.
Power units incorporating the P and T ports have two SAE-6
(9/16-18) female o-ring type ports to accept customer ttings.
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

10
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Start-Up Procedures
In circuits types using solenoid cartridge valves, the T ports will
be blocked by Oildyne with an SAE-6 plug.
Fluid connectors and conductors installed by the customer
should be selected based on an acceptable safety margin for
the maximum pressure required in the application. 550 Series
Power Units are capable of producing up to 207 bar (3000 psi).
Complete all necessary interconnecting piping to the power
unit. The line sizes should be determined based on oil ow,
operating pressure and allowable pressure drop between the
power unit and actuator.
One of the key ingredients for good service and long life from
a hydraulic system is cleanliness. Because most dirt inltrates
a hydraulic system during installation, we recommend the
following:
a) All open ports on the power unit, cylinders, etc. must remain
plugged with tape or plastic plugs until just before the hydraulic
connections are made.
b) All interconnecting tubing, pipe, or hose should be clean, and
free of rust, scale and dirt. The ends of all connectors should be
plugged until just before they are to be installed in the system.
c) All openings in the reservoir such as the ller breather or
access end covers holes must remain closed during installation.
Hydraulic Fluids
Follow all vendor-supplied instructions for safe handling, use and
disposal of the uid selected for operation in this power unit.
It is strongly recommended that the customer have available
the MSDS for the uid chosen for use in the 550 Series Power
Unit. Follow all instructions should the uid be spilled or come in
contact with an operator.
It is critical that the reservoir be lled with an approved uid
prior to startup of the power unit. Any system failures due to
improper uids being used or operating without the reservoir
being full of an approved uid will result in voiding the warranty.
The reservoir must be lled with clean uid through the ller
cap on the reservoir. The type of uid must be compatible
with the seals used on the power unit, and must comply with
the recommendations of the manufacturers of the component
parts. Acceptable uids include standard Automatic
Transmission Fluid (ATF) and most mineral based hydraulic
uids with viscosities between 32 cSt (150 SSU) and 64 cSt (300
SSU) at 38°C (100°F). For uids other than these, please contact
Oildyne Division with the details. If users wish to use alternative
oil, hydraulic uid or ATF, they are warned to check that they
have the same properties as those recommended. Parker
Oildyne takes no responsibility if alternatives are used.
Reservoir Filling
The cylindrical steel reservoirs have ller/breathers with a 3/8-18
NPT thread. The head of the breather is circular allowing the
breather to be removed and installed by hand only – no tools
are necessary. The 19 liter (5 gallon) reservoir breather is also
operable by hand – no tools are necessary.
The rectangular plastic reservoirs have a ller breather which
is a ‘push in/pull out’ design, installable by hand – no tools are
required.
Reservoir volumes: Maximum ll at 7 mm (.25 in) below ller for
all (vertical and horizontal) but 19 liter (5 gallon) reservoir, which
is 25.4 mm (1 in) below ller.
Vertical Mount (motor above reservoir)
Total Volume Usable Volume
Code Liter Gallon Liter Gallon
05 2.0 .51 1.1 .30
10 3.9 1.0 3.0 .80
15 5.5 1.4 4.5 1.2
06 3.0 .80 1.0 .26
11 4.8 1.3 3.0 .79
16 6.8 1.8 4.9 1.3
26 10.3 2.7 8.4 2.2
50 23.4 6.2 19 5.0
Horizontal Mount (motor foot down)
Total Volume Usable Volume
Code Liter Gallon Liter Gallon
05 2.5 .66 1.6 .44
10 4.5 1.2 2.9 .77
15 6.0 1.6 3.9 1.0
06 3.8 1.0 2.5 .67
11 5.3 1.4 3.3 .88
16 6.4 1.7 4.2 1.1
26 9.4 2.5 6.0 1.6
50 Vertical mounting only
The cleanliness of the uid going into the reservoir is very
important. In some cases, even new oil out of the drum is not
adequate. We recommend that any uid being transferred into
the reservoir be done with the transfer pump with a 10 micron
lter installed. A Parker-manufactured lter cart is available for
this purpose.
Start-Up Procedures
Circuit breakers/fuses
Fuses and circuit breaker protection must conform to national
electrical codes and local codes and practices. The following
table shows the Full Load Current (FLA) of the standard (60 Hz)
motors used in the 550 Series Power Units.
SINGLE PHASE MOTORS 115V 230V
MODEL RPM WAT TS HP FLA FLA
TC 1725 375 0.50 8.2 4.1
TE 1725 560 0.75 9.4 4.7
TJ 1725 750 1.00 13.6 6.8
TL 1725 1125 1.50 17.0 8.5
TV 1725 1500 2.00 19.0 9.5
TM 3450 375 0.50 6.2 3.1
TN 3450 560 0.75 9.0 4.5
TP 3450 750 1.00 12.4 6.2
TQ 3450 1125 1.50 16.0 8.0
TS 3450 1500 2.00 21.4 10.7
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

11
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Safe Operating Procedures
THREE PHASE MOTORS 230V 460V
MODEL RPM WAT TS 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 lled,
jog the electric motor to produce ow 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 lled, jog the electric
motor to produce ow 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 ttings 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 specied on
the valve cover and energize one solenoid. With the reservoir
lled, jog the electric motor and oil should appear at one of the
JIC-6 male extension ttings. 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 conrm
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 conrm
compliance with the EMC Directive.
The standard 60 Hz motors used in the 550 Series Power
Units are not certied per the Low Voltage Directive. However,
motors which are selected specically 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
specied 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 specic 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 ow 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 uid, it is required that the duty cycle be modied or
external cooling be used, such as a fan circulating air around
the reservoir. Under no circumstances should the system uid
ever exceed the maximum recommended temperature of 60°C
(140°F).
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

12
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Standard Product Model Code
4-WAY VALVE (ALL D03 SIZE)
CODE DESCRIPTION
NNN No 4-Way Valve Included
01Y Closed Center, 120 VAC, Conduit Connectors
01T Closed Center, 240 VAC, Conduit Connectors
01K Closed Center, 12 VDC, Conduit Connectors
01J Closed Center, 24 VDC, Conduit Connectors
02Y Open Center, 120 VAC, Conduit Connectors
02T Open Center, 240 VAC, Conduit Connectors
02K Open Center, 12 VDC, Conduit Connectors
02J Open Center, 24 VDC, Conduit Connectors
07Y Float Center, 120 VAC, Conduit Connectors
07T Float Center, 240 VAC, Conduit Connectors
07K Float Center, 12 VDC, Conduit Connectors
07J Float Center, 24 VDC, Conduit Connectors
08Y Tandem Center, 120 VAC, Conduit Connectors
08T Tandem Center, 240 VAC, Conduit Connectors
08K Tandem Center, 12 VDC, Conduit Connectors
08J Tandem Center, 24 VDC, Conduit Connectors
30Y Single Solenoid, 120 VAC, Conduit Connector
30T Single Solenoid, 240 VAC, Conduit Connector
30K Single Solenoid, 12 VDC, Conduit Connector
30J Single Solenoid, 24 VDC, Conduit Connector
Y01 Closed Center, 120 VAC, Hirschmann w/out Plugs
T01 Closed Center, 240 VAC, Hirschmann w/out Plugs
K01 Closed Center, 12 VDC, Hirschmann w/out Plugs
J01 Closed Center, 24 VDC, Hirschmann w/out Plugs
Y02 Open Center, 120 VAC, Hirschmann w/out Plugs
T02 Open Center, 240 VAC, Hirschmann w/out Plugs
K02 Open Center, 12 VDC, Hirschmann w/out Plugs
J02 Open Center, 24 VDC, Hirschmann w/out Plugs
Y07 Float Center, 120 VAC, Hirschmann w/out Plugs
T07 Float Center, 240 VAC, Hirschmann w/out Plugs
K07 Float Center, 12 VDC, Hirschmann w/out Plugs
J07 Float Center, 24 VDC, Hirschmann w/out Plugs
Y08 Tandem Center, 120 VAC, Hirschmann w/out Plugs
T08 Tandem Center, 240 VAC, Hirschmann w/out Plugs
K08 Tandem Center, 12 VDC, Hirschmann w/out Plugs
J08 Tandem Center, 24 VDC, Hirschmann w/out Plugs
Y30 Single Solenoid, 120 VAC, Hirschmann w/out Plug
T30 Single Solenoid, 240 VAC, Hirschmann w/out Plug
K30 Single Solenoid, 12 VDC, Hirschmann w/out Plug
J30 Single Solenoid, 24 VDC, Hirschmann w/out Plug
550
MOTOR SELECTION - TEFC
Single Phase = 115/230 VAC, 60 HZ
Three Phase = 230/460 VAC, 60 HZ
CODE HP RPM PHASE
TC .50 1725 Single
TD .50 1725 Three
TM .50 3450 Single
TT .50 3450 Three
TE .75 1725 Single
TF .75 1725 Three
TN .75 3450 Single
TU .75 3450 Three
TJ 1.0 1725 Single
TK 1.0 1725 Three
TP 1.0 3450 Single
TW 1.0 3450 Three
TL 1.5 1725 Single
TO 1.5 1725 Three
TQ 1.5 3450 Single
TX 1.5 3450 Three
TV 2.0 1725 Single
TR 2.0 1725 Three
TS 2.0 3450 Single
TY 2.0 3450 Three
TH 3.0 3450 Three
PUMP SIZE
CODE DISPLACEMENT
RESERVOIR
CODE VOLUME
CIRCUIT
CODE DESCRIPTION
D0 D03 Pad & Extension Fittings
D1 D03 Pad with Dual PO Check Manifold (Manapak)
(for use with D03 Directional Control Valves)
SA Standard Pressure & Tank Ports
SW Std P & T Ports with Outlet Port Check Valve
Two Position Two Way Cartridge Valves
Following circuits include outlet port check valve:
S1 12 VDC, Normally Closed, Conduit Connector
S2 24 VDC, Normally Closed, Conduit Connector
S3 120 VAC, Normally Closed, Conduit Connector
S4 240 VAC, Normally Closed, Conduit Connector
S5 12 VDC, Normally Open, Conduit Connector
S6 24 VDC, Normally Open, Conduit Connector
S7 120 VAC, Normally Open, Conduit Connector
S8 240 VAC, Normally Open, Conduit Connector
P1 12 VDC, Normally Closed, DIN Connector
P2 24 VDC, Normally Closed, DIN Connector
P3 120 VAC, Normally Closed, DIN Connector
P4 240 VAC, Normally Closed, DIN Connector
P5 12 VDC, Normally Open, DIN Connector
P6 24 VDC, Normally Open, DIN Connector
P7 120 VAC, Normally Open, DIN Connector
P8 240 VAC, Normally Open, DIN Connector
FLOW CONTROL
(for use with Cartridge Valves)
CODE DESCRIPTION
NN None (use with D0 and D1 circuits)
HP None (use with all other circuits)
F1 Press. Comp., .5 to 1.0 GPM
F2 Press. Comp., 1.0 to 2.0 GPM
RV SETTING
In multiples of 100 psi
Examples
04 = 400 psi
12 = 1200 psi
29 = 2900 psi
550 POWER UNIT
- includes relief
valve
Note: 19 liter (5 gallon)
steel reservoir can be
mounted vertically only.
All others are vertical
and horizontal ready
04 0.66 cc/rev (.04 in
3
/rev)
07 1.15 cc/rev (.07 in
3
/rev)
10 1.64 cc/rev (.10 in
3
/rev)
14 2.29 cc/rev (.14 in
3
/rev)
17 2.79 cc/rev (.17 in
3
/rev)
20 3.28 cc/rev (.20 in
3
/rev)
05 2 Liter 0.5 Gallon Steel
10 4 Liter 1.0 Gallon Steel
15 6 Liter 1.5 Gallon Steel
50 19 Liter 5.0 Gallon Steel
06 2 Liter 0.5 Gallon Plastic
11 4 Liter 1.0 Gallon Plastic
16 6 Liter 1.5 Gallon Plastic
26 10 Liter 2.5 Gallon Plastic
Standard Product Model Code
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

13
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
4-WAY VALVE (ALL D03 SIZE)
CODE DESCRIPTION (For use only with Circuit Codes D0 and D1)
NNN No 4-Way Valve Included
01Y Closed Center, 120 VAC, Conduit Connectors
01T Closed Center, 240 VAC, Conduit Connectors
01K Closed Center, 12 VDC, Conduit Connectors
01J Closed Center, 24 VDC, Conduit Connectors
02Y Open Center, 120 VAC, Conduit Connectors
02T Open Center, 240 VAC, Conduit Connectors
02K Open Center, 12 VDC, Conduit Connectors
02J Open Center, 24 VDC, Conduit Connectors
07Y Float Center, 120 VAC, Conduit Connectors
07T Float Center, 240 VAC, Conduit Connectors
07K Float Center, 12 VDC, Conduit Connectors
07J Float Center, 24 VDC, Conduit Connectors
08Y Tandem Center, 120 VAC, Conduit Connectors
08T Tandem Center, 240 VAC, Conduit Connectors
08K Tandem Center, 12 VDC, Conduit Connectors
08J Tandem Center, 24 VDC, Conduit Connectors
30Y Single Solenoid, 120 VAC, Conduit Connector
30T Single Solenoid, 240 VAC, Conduit Connector
30K Single Solenoid, 12 VDC, Conduit Connector
30J Single Solenoid, 24 VDC, Conduit Connector
Y01 Closed Center, 120 VAC, Hirschmann w/out Plugs
T01 Closed Center, 240 VAC, Hirschmann w/out Plugs
K01 Closed Center, 12 VDC, Hirschmann w/out Plugs
J01 Closed Center, 24 VDC, Hirschmann w/out Plugs
Y02 Open Center, 120 VAC, Hirschmann w/out Plugs
T02 Open Center, 240 VAC, Hirschmann w/out Plugs
K02 Open Center, 12 VDC, Hirschmann w/out Plugs
J02 Open Center, 24 VDC, Hirschmann w/out Plugs
Y07 Float Center, 120 VAC, Hirschmann w/out Plugs
T07 Float Center, 240 VAC, Hirschmann w/out Plugs
K07 Float Center, 12 VDC, Hirschmann w/out Plugs
J07 Float Center, 24 VDC, Hirschmann w/out Plugs
Y08 Tandem Center, 120 VAC, Hirschmann w/out Plugs
T08 Tandem Center, 240 VAC, Hirschmann w/out Plugs
K08 Tandem Center, 12 VDC, Hirschmann w/out Plugs
J08 Tandem Center, 24 VDC, Hirschmann w/out Plugs
Y30 Single Solenoid, 120 VAC, Hirschmann w/out Plug
T30 Single Solenoid, 240 VAC, Hirschmann w/out Plug
K30 Single Solenoid, 12 VDC, Hirschmann w/out Plug
J30 Single Solenoid, 24 VDC, Hirschmann w/out Plug
550
MOTOR SELECTION - TEFC
Single Phase = 115/230 VAC, 60 HZ
Three Phase = 230/460 VAC, 60 HZ
CODE HP RPM PHASE
TC .50 1725 Single
TD .50 1725 Three
TM .50 3450 Single
TT .50 3450 Three
TE .75 1725 Single
TF .75 1725 Three
TN .75 3450 Single
TU .75 3450 Three
TJ 1.0 1725 Single
TK 1.0 1725 Three
TP 1.0 3450 Single
TW 1.0 3450 Three
TL 1.5 1725 Single
TO 1.5 1725 Three
TQ 1.5 3450 Single
TX 1.5 3450 Three
TV 2.0 1725 Single
TR 2.0 1725 Three
TS 2.0 3450 Single
TY 2.0 3450 Three
PUMP SIZE
CODE DISPLACEMENT
04 .04 CIPR
07 .07 CIPR
10 .10 CIPR
14 .14 CIPR
17 .17 CIPR
20 .20 CIPR
RESERVOIR
CODE VOLUME
05 0.5 Gal. Steel
10 1.0 Gal. Steel
15 1.5 Gal. Steel
50 5.0 Gal. Steel
06 0.5 Gal. Plastic
11 1.0 Gal. Plastic
16 1.5 Gal. Plastic
26 2.5 Gal. Plastic
CIRCUIT
CODE DESCRIPTION
D0 D03 Pad & Extension Fittings
D1 D03 Pad with Dual PO Check Manifold (Manapak)
(for use with D03 Directional Control Valves)
SA Standard Pressure & Tank Ports
SW Std P & T Ports with Outlet Port Check Valve
Two Position Two Way Cartridge Valves
Following circuits include outlet port check valve:
S1 12 VDC, Normally Closed, Conduit Connector
S2 24 VDC, Normally Closed, Conduit Connector
S3 120 VAC, Normally Closed, Conduit Connector
S4 240 VAC, Normally Closed, Conduit Connector
S5 12 VDC, Normally Open, Conduit Connector
S6 24 VDC, Normally Open, Conduit Connector
S7 120 VAC, Normally Open, Conduit Connector
S8 240 VAC, Normally Open, Conduit Connector
P1 12 VDC, Normally Closed, DIN Connector
P2 24 VDC, Normally Closed, DIN Connector
P3 120 VAC, Normally Closed, DIN Connector
P4 240 VAC, Normally Closed, DIN Connector
P5 12 VDC, Normally Open, DIN Connector
P6 24 VDC, Normally Open, DIN Connector
P7 120 VAC, Normally Open, DIN Connector
P8 240 VAC, Normally Open, DIN Connector
FLOW CONTROL
(for use with Cartridge Valves)
CODE DESCRIPTION
NN None (use with D0 and D1 circuits)
HP None (use with all other circuits)
F1 Pressure Compensated, 2 to 4 LPM (.5 to 1.0 GPM)
F2 Pressure Compensated, 4 to 8 LPM (1.0 to 2.0 GPM)
RV SETTING
In multiples of 100 psi
Examples
04 = 400 psi
12 = 1200 psi
29 = 2900 psi
550 POWER UNIT
- includes relief
valve
Note: 5 gal. steel reservoir
can be mounted vertically
only. All others are vertical
and horizontal ready
(100 psi = 6.8 bar)
NN None Customer Supplied
“No Motor” note:
A 56C adapter kit is
available enabling the
customer to provide and
mount a standard 56C
with base electric motor.
Standard Product Model Code
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

14
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Operation and Maintenance
Removal from service
There may be hydraulic liquid under
pressure. Do not open unit or break pipe
connections until hydraulic pressure has
been released.
If, for some reason, the power unit must be removed from
service, follow these instructions:
1) Wear protective eye gear.
2) Remove electrical power from the motor and solenoid valve
(if applicable).
3) Mechanically hold/block the actuator load to prevent its
movement once pressure is relieved in the uid conductors.
4) Only after the load is mechanically held in place, put a
rag around the A or B port tting and loosen the port
connection. The rag will absorb an oil leakage as any locked
pressure is relieved. Then put a rag around the other port
connection and loosen the port connection.
5) Immediately cap the uid conductor ends and the power unit
ports to prevent the introduction of contaminants until the
power unit is reconnected.
6) When reinstalling the power unit, follow all the procedures
and startup instructions on page 10.
Operation
Suitable lighting requirements for operation of this unit are the
responsibility of installing manufacturer.
The 550 Series Power Units are assembled and tested
according to the specic model codes ordered. See page 15 for
performance graphs which provide the expected ows of the
available pump sizes at 1725 RPM and 3450 RPM at a variety of
pressures.
Maintenance
Maintenance should only be conducted when units are
disconnected from the power supply, depressurized and
removed from service.
Reservoirs -Maintain oil level at all times. The oil should be
checked after the rst 100 hours and veried that the class of
oil meets the requirements of the pump being used. Change the
oil every 1000 to 2000 hours depending on the application and
operation environment.
Cylindrical Steel and Composite Reservoirs
To remove the uid from the cylindrical steel and composite
reservoirs, it is recommended to remove the ller cap and use
a siphon to remove the oil. Dispose of, or recycle the used
uid according to local regulations. Once the uid is removed,
an examination of the suction strainer is suggested. To access
the strainer, the reservoir must be removed. To remove the
cylindrical steel and composite plastic reservoirs, loosen and
remove the four screws holding the reservoir ange to the
power unit adapter. These screws require an 8 mm (5/16 in)
wrench or socket.
In horizontal applications, place absorbent paper or towels
under the reservoir ange area to catch any remaining uid as
the reservoir is removed from the power unit adapter. Dispose
of any oil-soaked materials according to local regulations.
19 liter (5 gallon) reservoir
To remove the uid from this reservoir, there are two drain
plugs provided, one on each end. These plugs require an
adjustable wrench or 15 mm (9/16 in) open end wrench to
remove (and replace). Another option is to remove the electric
motor and adapter assembly from the reservoir by removing
the four each 5/16 in hex head screws holding the adapter to
the reservoir cover. Use a siphon to remove the uid from this
reservoir. Dispose of, or recycle the used uid according to
local regulations. This method will allow for examination of the
suction strainer.
Suction strainer – It is recommended that at the same intervals
at which the reservoir uid is changed, the suction strainer
be examined for any conditions restricting the free ow of
uid through it. If the strainer appears restricted at all, it is
recommended that the strainer be replaced. The strainer is
Oildyne part number 410542. The strainer is hand threaded onto
a plastic elbow. Turn the strainer counter-clockwise to remove
then install a new strainer by turning the strainer clockwise onto
the elbow threads until it is tight against the elbow hex.
Cylindrical Steel and Composite Reservoirs
Once the suction strainer has been installed, replace the
reservoir using the same four hex head screws. Ensure the
ller port on the reservoir is oriented to face UP. Torque the
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

15
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Performance Data
550 Power Units @ 1725 RPM
17
14
20
07
04
10
(500) (3000)(2500)(2000)(1500)(1000)
(50)
(100)
(150)
(200)
(250)
(300)
(350)
0.8
1.6
2.5
3.3
4.1
4.9
5.7
(400)
6.6
Output Flow - lpm (cipm)
034 69 103 138 172 207
Operating Pressure - bar (psi)
0
550 Power Units @ 3450 RPM
17
14
20
07
04
10
(500) (3000)(2500)(2000)(1500)(1000)
(100)
(200)
(300)
(400)
(500)
(600)
(700)
1.6
3.3
4.9
6.6
8.2
9.8
11.5
(800)
13.1
Output Flow - lpm (cipm)
034 69 103 138 172 207
Operating Pressure - bar (psi)
0
Motor Horsepower Recommendations at Flow/Pressure
Pump
Size
Nominal GPM Pressure Bar (PSI)
@1725 @3450
34
(500)
69
(1000)
103
(1500)
138
(2000)
172
(2500)
207
(3000)
04 ¼.50 HP .50 HP .50 HP .50 HP .50 HP .50 HP
04 ½.50 HP .50 HP .50 HP .75 HP 1.0 HP 1.0 HP
07 ½.50 HP .50 HP .50 HP .75 HP 1.0 HP 1.0 HP
07 1.50 HP .75 HP 1.0 HP 1.5 HP 2.0 HP 2.0 HP
10 ¾.50 HP .50 HP .75 HP 1.0 HP 1.5 HP 1.5 HP
10 1 ½ .75 HP 1.0 HP 1.5 HP 2.0 HP 3.0 HP 3.0 HP
14 1.50 HP .75 HP 1.0 HP 1.5 HP 2.0 HP 2.0 HP
14 21.0 HP 1.5 HP 2.0 HP 3.0 HP
17 1 ¼ .50 HP 1.0 HP 1.5 HP 2.0 HP 2.0 HP
17 2 ½ 1.0 HP 2.0 HP 3.0 HP
20 1 ½ .50 HP 1.0 HP 1.5 HP 2.0 HP
20 31.0 HP 2.0 HP 3.0 HP
Note: Performance data is for reference only
Performance data based on ATF @ 21°C (70°F)
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

16
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
are warned to check that they have the same properties as
those recommended. Parker Oildyne takes no responsibility if
alternatives are used.
Maintenance Suggestions
1. Never return to the system any uid which has leaked out.
2. Always keep the supply of fresh uid covered tightly.
3. Use clean containers, hoses, and funnels when lling the
reservoir. Use of a lter cart when adding oil is highly
recommended.
4. Use common sense precautions to prevent entry of dirt into
components which have been temporarily removed from the
circuit.
5. Make sure that the breather/ller on the reservoir is properly
fastened.
6. Do not run the system unless the normally provided suction
strainer is in place.
7. Make certain that the uid used in the system is of a type
recommended by Parker Oildyne.
8. Parker offers an oil sampling kit which can be used to
ascertain the condition of the system uid.
Maintaining Proper Oil Temperature
Hot oil in your equipment’s hydraulic system is one of the
primary causes of poor operation, component failure and
downtime. Here are some tips on maintaining proper oil
temperature.
1. The oil in your hydraulic system was designed for operation
within a specied temperature range. You may be able
to run it at hotter temperatures for short periods of time,
intermittently, without adverse effects. If run continuously
with oil that is too hot, equipment will operate poorly causing
key component failure and machine downtime.
2. “Hot oil” is a relative term. In most cases, 49°C (120°F) at
the reservoir is considered an ideal operating temperature.
Always take an oil temperature reading at the reservoir, not
at a component or any of the piping.
3. Keep your equipment clean. A thick layer of dirt acts as
insulation. It will prevent the hydraulic system from getting rid
of heat.
4. On hot days, and in hot climates, check and change the oil
more frequently. Be sure to use an oil recommended for
hot weather operation by the equipment manufacturer or oil
supplier.
Measuring Oil Temperature
If your machine does not have a reservoir thermometer, use the
“palm test”. First check the tank with your ngertip; if it is not
too hot to touch, place your palm on the tank. You should be
able to hold it there without discomfort if the oil temperature is
about 54°C (130°F) or below.
Isolating Trouble-Spots
To determine which components are “running hot” and
overheating the oil, touch the outlet ttings and lines at the
valves, pumps and motors. If the oil temperature is normal going
into a component but hot coming out, that could be one of the
potential problem areas.
A sticking valve can cause excessive heat. If a spool does not
return promptly to the neutral position, the pump ow will be
dumping continuously. This builds up heat rapidly.
If a relief valve is set too low, part of the oil will be dumped
across the valve with every cycle. This too, generates excessive
heat. Even when all valves are set properly, they may not be
four screws to 5.6 Nm (50 in-lbs). Rell the reservoir with an
approved uid prior to startup of the power unit. Any system
failures due to improper uids being used or operating without
the reservoir being full of an approved uid will result in voiding
the warranty.
19 liter (5 gallon) reservoir
Once the suction strainer has been installed, remount the motor
and pump combination on the reservoir cover, ensuring the
reservoir gasket is still in place, positioned so the four holes on
the corners are aligned with the four adapter mounting screw
holes. Torque these four screws to 5.6 Nm (50 in-lbs). Rell the
reservoir with an approved uid prior to startup of the power
unit. Any system failures due to improper uids being used or
operating without the reservoir being full of an approved uid
will result in voiding the warranty.
The reservoir must be lled with clean uid through the ller
cap on the reservoir. The type of uid must be compatible
with the seals used on the power unit, and must comply with
the recommendations of the manufacturers of the component
parts. Acceptable uids include standard Automatic
Transmission Fluid (ATF) and most mineral based hydraulic
uids with viscosities between 32 cSt (150 SSU) and 64 cSt (300
SSU) at 38°C (100°F). For uids other than these, contact Parker
Oildyne with the details. If users wish to use alternative oil,
hydraulic uid or ATF, they are warned to check that they have
the same properties as those recommended. Parker Oildyne
takes no responsibility if alternatives are used.
Reservoir volumes: Maximum ll at 7 mm (.25 in) below ller for
all (vertical and horizontal) but 19 liter (5 gallon) reservoir, which
is 25.4 mm (1 in) below ller.
Vertical Mount (motor above reservoir)
Total Volume Usable Volume
Code Liter Gallon Liter Gallon
05 2.0 .51 1.1 .30
10 3.9 1.0 3.0 .80
15 5.5 1.4 4.5 1.2
06 3.0 .80 1.0 .26
11 4.8 1.3 3.0 .79
16 6.8 1.8 4.9 1.3
26 10.3 2.7 8.4 2.2
50 23.4 6.2 19 5.0
Horizontal Mount (motor foot down)
Total Volume Usable Volume
Code Liter Gallon Liter Gallon
05 2.5 .66 1.6 .44
10 4.5 1.2 2.9 .77
15 6.0 1.6 3.9 1.0
06 3.8 1.0 2.5 .67
11 5.3 1.4 3.3 .88
16 6.4 1.7 4.2 1.1
26 9.4 2.5 6.0 1.6
50 Vertical mounting only
It is recommended that all uid being transferred into the
reservoir be done by a transfer pump with a 10 micron lter
installed. A Parker-manufactured lter cart is available for this
purpose.
Hydraulic Fluids
Dispose of, or recycle the used uid according to local
regulations.
If users wish to use alternative oil, hydraulic uid or ATF, they
Maintenance
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

17
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
Troubleshooting
operating well because of worn orices or seals.
Always remove and check the hot components rst.
Check Oil Samples Periodically
Periodically checking oil temperature and siphoning an oil
sample from the reservoir, comparing it with a sample of new,
clean oil, is good preventive maintenance.
Oil that has been running too hot will look darker and feel
thinner than new oil. It will also smell burned. Normally it
will contain more contaminants, because hot oil leads to
accelerated wear of component parts.
Recommended Spare Parts
The only recommended maintenance component is the suction
FAILURE MODE CAUSE(S) CORRECTIVE ACTION
Motor will not run No power to the motor Ensure proper voltage is available at motor
Motor is wired incorrectly Wire the motor per the Installation instructions
Motor runs, but no flow Reservoir does not have enough uid Fill the reservoir per the Installation instructions with an
approved uid
Motor rotation is not clockwise from fan end Single phase motors: wire per the Installation instructions
Three phase: interchange any two of the three power
leads
Two position/two way valve is not closed If a normally open valve, energize to close. If a normally
closed valve, de-energize coil
D03/NG6 valve is not shifted from center position Energize one of the valve solenoids
Low flow Incorrect pump was selected or installed Contact your distributor for rework instructions
Relief valve is set too low for application allowing
bypass
Increase the relief valve setting ensuring the ow and
pressure output are still within the electric motor’s
capability
Reservoir overflows on cylinder
retract
Reservoir is too full. Filling the reservoir with
the actuators extended will cause an overow
condition when actuators are retracted
Ensure that, with the system full of oil and the actuators
fully retracted, the reservoir is at the full condition
Motor gets hot/high current
draw
Motor is not wired per the Installation instructions Ensure proper voltage is available at motor
Wire the motor per the Installation instructions
Will not build pressure Reservoir does not have enough uid Fill the reservoir per the Installation instructions with an
approved uid
Motor rotation is not clockwise from fan end Single phase motors: wire per the Installation instructions
Three phase: interchange any two of the three power
leads
Relief valve is set too low for application allowing
bypass
Increase the relief valve setting ensuring the ow and
pressure output are still within the electric motor’s
capability
Will not hold pressure Circuit type selected will not hold pressure Ensure the model code calls out the D1 circuit, the SW
circuit or an S_ or P_ circuit. Only these circuits are
designed to hold pressure
Two position/two way valve is not closed If a normally open valve, energize to close. If a normally
closed valve, de-energize coil
D03/NG6 valve selected without the Manapak
check valve block
D03/NG6 directional valves are not designed to hold
pressure. Contact your Parker Oildyne distributor to
purchase a Manapak check valve manifold
Leaks at fittings Hose ends/tting adapters are not the correct
type for the 550 Series ports
For the D0 and D1 circuits, the power unit includes JIC-6
male extension ttings. For all other circuits, the power
unit has SAE-6 male ports
Fittings are not tightened properly Ensure all ttings are properly tightened
Actuator will not move both ways Valve coils are not energized properly Ensure the directional valve coils are operating properly
Relief valve is set too low for application allowing
bypass
Increase the relief valve setting ensuring the ow and
pressure output are still within the electric motor’s
capability
strainer, Oildyne part number 410542. See the Maintenance
section on page 14 for instructions on replacing the suction
strainer.
Be aware of risk of hazards if poor quality replacement parts are
used or are obtained from an unauthorized source. Using non-
Parker supplied components will void the warranty.
Conclusive Unit Failure
If the operation of the unit cannot be restored after attempts at
the troubleshooting suggestions listed below, please contact
your local Parker distributor or the Oildyne Division directly to
arrange for warranty replacement/repair if within the warranty
period.
Troubleshooting
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

18
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
FAILURE MODE CAUSE(S) CORRECTIVE ACTION
Dirty fluid Filler/breather cap not installed on reservoir Install the proper ller/breather cap on the reservoir.
Drain dirty uid and replace with clean uid
Fluid lines not properly covered while servicing
power unit
Once service is complete and all lines are properly
connected, drain dirty uid and replace with clean uid
Pump strainer is plugged, damaged or missing Install a new pump suction strainer
Foaming fluid Fluid line is broken allowing air into system Locate and replace broken uid lines. Allow air in uid to
settle out before operating system
Fluid contaminated with foreign matter Eliminate source of foreign matter, drain dirty uid and
replace with clean uid
System overheats Power unit runs at relief valve setting for
extended period of time
Install switches or load holding valve as needed to
prevent the pump from running over the relief valve for
extended period of time
Reservoir sized too small Contact your Parker Oildyne distributor for a larger
reservoir
Fluid conductors are too small for system ow
rates
Increase the uid conductor sizes to reduce uid
velocities
Foreign matter sources in
system
Sealing compound (pipe dope, TeonTM tape,
etc.) allowed inside ttings
Use a reduced amount of sealing compound to ensure it
doesn’t overow into wetted areas
System pressure exceeds design limits of seals
and gaskets
Either reduce the operating pressure or select
components capable of the high pressures
Human element – components not protected
during service
During service, ensure all components are protected
from external contamination
Solenoid coil failures Voltage too low Voltage to solenoids must be per solenoid specication
to avoid burning out coil
Voltage too high Voltage to solenoids must be per solenoid specication
to avoid burning out coil
Both solenoids are energized concurrently Only one solenoid can be energized at any given time
to prevent coil burnout. Ensure voltage signals are
interlocked to prevent this condition
Mechanical damage to leads Replace all damaged wires and/or plugs
Voltage signal loss Long leads can cause improper voltage signal at coils
and erratic signal. Check with voltmeter
Troubleshooting
Appendix
56C Adapter Kit, part number 775679, Installation
using Customer-supplied Motor
Installing customer-supplied motor using 56C Adapter Kit
This is easiest with the 550 Series Power Unit sitting vertically
on a table with the reservoir down.
1. Tighten the tapered ends of the four studs into the motor face
threaded holes until bottomed out. These are interference t
studs so resistance is expected.
2. Install the shaft adapter onto the motor’s keyed shaft with the
set screw positioned over the keyway. With the shaft adapter
pushed all the way onto the motor shaft, tighten the set screw
to 3.4 to 4.5 Nm (30 to 40 in-lbs) torque using a 5/64 in Allen
wrench.
3. Take the coupling that came with the power unit and liberally
ll both slots with a heavy, axle-type, grease.
4. Insert the coupling into the power unit adapter so the pump
shaft tang engages the female slot fully.
5. Position the 56C adapter plate on the 550 Series Power Unit
adapter so the four through holes align with the four through
holes in the power unit adapter.
6. Turn the motor shaft so the tang on the shaft adapter will align
with the up-facing coupling slot, then carefully lower the electric
motor vertically onto the power unit/56C adapter plate so the
four studs pass through the four through holes. If the motor
face, the 56C adapter plate and the 550 Series Power Unit
adapter are not tight together, reposition the motor shaft until it
aligns with, and mounts into, the coupling slot.
7. Turn the four nuts onto the four studs until all are nger tight,
then torque the four nuts to 20 +/- .5 Nm (180 +/- 5 in-lbs).
Installation is now complete. Follow the start up instructions on
page 10.
SHAFT ADAPTER
& SET SCREW
CUSTOMER'S MOTOR
56C ADAPTER PLATE
550 SERIES
POWER UNIT
ADAPTER
NUTS (4)
STUDS (4)
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

19
Bulletin HY22-3220A/US Instruction Manual
550 Series Hydraulic Power Units
EC Declaration of Incorporation.
Manufacturer’s Name: Parker Hannin Corporation
Manufacturer’s Address: Oildyne Division
5520 Highway 169 North
New Hope, MN 55428 USA
Declare that the partially complete machinery described below conforms to applicable health and safety requirements of
Part 1 of Annex 1 of Machinery Directive 2006/42/EC taking full account of requirements for pressure equipment. This
partly completed machinery must not be put into service until the machinery into which it is to be incorporated has been
declared in conformity with the provisions of the Machinery Directive. Condential technical documentation has been
compiled as described in Part B of Annex VII of Machinery Directive 2006/42/EC and is available to European national
authorities on written request. If a request is received documentation will be transmitted either electronically or by post.
Description: Oildyne 550 Series Power Units
Model Number: As Applies
Sizes: All
Serial Number: All
The following standards have either been referred to or complied with in part or in full as relevant:
ENISO 12100 – 2 Machinery Safety - Basic concepts, general principles for design
– Part 2: Technical principles and specications.
EN13849 Machinery Safety - Safety Related Parts of Control Systems – Part 1: General
Principles for Design.
EN 982:1996 Machinery Safety - Safety requirements for uid power systems and their
components – Hydraulics.
Full Name of responsible person Van Mancuso
Place of signing:
Parker Hannin Corporation
Oildyne Division Position General Manager, Oildyne Division
5520 Highway 169 North
New Hope, MN 55428 USA
Signature Date March 17, 2011
Full Name of Authorized European Representative Stephen Fryer
Place of signing:
Parker Hannin Ltd.
Cylinder Division Europe Position General Manager, Cylinder Division Europe
6 Greycaine Road,
Watford, Hertfordshire. WD24 7QA, UK
Signature Date March 17, 2011
Declaration of Incorporation
Parker Hannifin
HPS Division
New Hope, MN 55428 USA

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Bulletin HY22-3220A/US
.1M, 11/11 BG
© 2011 Parker Hannin Corporation. All rights reserved.
Parker Hannifin Corporation
Hydraulic Pump and Power Systems Division
Oildyne Business Unit
5520 Highway 169 North
New Hope, MN 55124 USA
Ph: 937-644-3915
Fax: [phone]
www.parker.com/hps