Eagle Hydraulic Operating instructions

OPERATION AND
TROUBLESHOOTING GUIDE
12 & 24 volt DC Power Units
Revision 2.0-2018

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OPERATION AND TROUBLESHOOTING GUIDE
IMPORTANT
Thank you for purchasing one of our Eagle Hydraulic® power unit.
Before you start using your new power unit, please make sure that you read and understand the owner’s
instructions and that you always operate this equipment in a safe manner. For any technical problems or
questions, please consult a qualified hydraulic technician or call your nearest Eagle Hydraulic distributor.
WARRANTY
All power units from Eagle Hydraulic are warranted free from defective parts, workmanship and/or assembly
errors for a period of one (1) year from the date of manufacturing.
Power units are supplied with a model number and a serial number. Please make sure you have those
information on hand when calling. Power units without the model number and/or serial number will NOT be
covered under warranty. Any disassembly or modification made on a power unit that is still under warranty will
automatically VOID that warranty.
Eagle Hydraulic stands behind their products. All our power units are tested and verified prior to shipping.
Therefore, any signs of improper application will void the warranty.
Examples of improper applications are:
•Low voltage: inadequate power source can damage electrical components
•High amperage draw: bad grounds or excessive amperage can burn the electrical components
such as the starter, coils, motor and/or hand control
•Oil quality: contaminated oil or incompatible oil can damage pumping system, valves and the
actuator. The type of oil used, and the verification of oil quality is the responsibility of the end
user. Eagle Hydraulic recommends:
ISO 32, filtered to 20 microns or better
•Environment: the performance of your power unit can be affected by the environment. For
example, if the power unit is not carefully protected or if the environment is salty, acidic, very
cold, very hot, etc.

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OPERATION AND TROUBLESHOOTING GUIDE
OPERATION AND MAINTENANCE
ELECTRICAL WIRING
Every DC power unit from Eagle Hydraulic is assembled with a solenoid starter assembly that is mounted on the motor.
Independent battery leads must be connected to the terminals of the DC motor and solenoid starter. See the drawing
below:
Connect the positive side of the battery to the positive side of the solenoid starter (B), mounted on the electrical motor.
Then, connect the negative side of the battery to the ground terminal (F) on the motor.
Select the proper cable size to connect the battery to your Eagle Hydraulic power unit from the chart below. Improper
cable sizing may create problems if it is too small for the load of the power unit or if the cables are too long. Selecting the
proper cable size is especially important if the unit is further than 25 feet from the battery. Eagle Hydraulic recommends
that the ground cable size be equivalent or larger than the battery "hotside" cable.
60-70 ft
#1
#00
50-60 ft
#2
#0
#0
40-50 ft
#2
#1
#0
#00
30-40 ft
#4
#1
#0
#00
#00
20-30 ft
#4
#2
#1
#0
#00
10-20 ft
#4
#2
#1
#0
#00
0-10 ft
#4
#2
#1
#0
#00
0-100 amp
100-150 amp
150-200 amp
200-250 amp
250-300 amp
N.B. If in doubt, always consult with a qualified automotive electrician for correct connection of DC electrical devices. Low voltage could cause
damage to the DC motor. DC motors should not be run for extended periods (Consult technical data for duty cycles).

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OPERATION AND TROUBLESHOOTING GUIDE
HYDRAULIC CONNECTION
After you have correctly connected your power unit to an appropriate power supply, you must fill the tank with a suitable
hydraulic oil.
Eagle Hydraulic recommends: ISO 32, filtered to 20 microns or better
After the tank is filled, you must start the pumping system and bleed out all the air for a smooth system operation.
Bleeding of the system must be made by cracking the line to the highest point up from ground. Briefly operate the power
unit until all air is expelled from the supply line and a clear stream of oil flows out.
Once a continuous stream of fluid is visible, without evidence of air, the supply line should be tightened, and the power
unit should be switched off.
If you have multiple actuators, it is recommended to bleed each one of them. Once they all have been bled of air, they
should be fully retracted and the level of oil in the reservoir should be checked and adjusted if necessary.
MAINTENANCE
All Eagle Hydraulic power units are designed to give a long, trouble free service life with just a few maintenance checks at
regular intervals.
•Oil Level: the level of oil inside the tank should be verified every day and topped up if necessary. If you see a
change in the need of oil, there might be a leakage in the hydraulic system. Check each adaptor, seal and
hose to identify the source of the leak and rectify.
•Filtration of the system:Each system comes equipped with a filtered filler breather to help prevent all
contaminants from the outside to be brought inside the hydraulic oil tank. Since the breather can get clogged
over time, it should be replaced regularly. A suction strainer is also mounted on the intake side of the hydraulic
pump located inside the tank. The suction filter should be replaced as part of a regular maintenance routine.
WE OFFER UP TO 20 DIFFERENT OPTIONS, BELOW ARE OUR MOST POPULAR VERSIONS
OPTION 1
OPTION 2
OPTION 3
OPTION 11
OPTION 12
OPTION 24+
Pressure and Tank
ports, relief and
check valve only
Single acting with
2way/2position
cartridge valve
Single acting with
Manual directional
valve
Double acting with
cartridge directional
valve, load holding
valve and B port
relief
Double acting, with
external D03
modular valve
Double acting, with
multiple external
D03 modular valves
(Shown here w/4)

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OPERATION AND TROUBLESHOOTING GUIDE
SYMPTOMS AND SOLUTIONS - EASY TROUBLESHOOTING GUIDE
Please use this guide to easily troubleshoot your Eagle Hydraulic power unit. It is recommended to go through each step,
as this guide has been created in a logical sequence. If followed from top to bottom, you should go through all possible
symptoms and should be able to find the problem.
The most common situation you can easily fix:
Problem: If you have an option 2 and you are not able to build pressure
Cause: The manual override of the 2-way poppet valve has probably been left open
How to fix it: Push down on the poppet valve and turn clockwise until it locks. The manual override is now closed, and it
should operate properly.
The following table lists the most common problem you can encounter and what you should verify in each case.
SYMPTOM OR PROBLEM
VERIFICATION TO DO
The motor is not running
•
Check the connection from your power supply to the DC motor.
•
Check the power to the solenoid starter.
Solenoid starter clicks but the motor does not start
•Check for loose wire from solenoid starter to DC motor.
•Make sure you have the right gauge of wire from your battery
to the unit.
•Check for cracked terminal on solenoid starter, if so, replace
start solenoid.
•If it’s an older unit, check for rust buildup inside DC motor.
Motor runs, but unit will not build hydraulic pressure
•Solenoid valve manual override is open
Some of our units (Option 2) are equipped with a two-position
valve with a mechanical manual override. With stem of valve
pointing up, push down and turn clockwise until stem won’t
turn. The manual override is now closed. Retry unit.
•Gear pump might not be priming.Loosen the relief valve,
replace relief valve (torque to 22Nm) and retry unit.

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OPERATION AND TROUBLESHOOTING GUIDE
Power unit won’t lift load
•Check fluid level
If there is not enough oil in the unit, you will not be able to
operate the actuator.
•Gear pump might not be priming.Loosen the relief valve,
replace relief valve (torque to 22Nm) and retry unit.
•Air being introduced in system
If air is being introduced in the system, the gear pump might
have some difficulty priming. Listen for distinctive cavitation
sounds from pump and verify all hydraulic hoses and fittings for
proper sealing.
Cylinder won’t hold in place (drift down)
•Check valve on unit might leak
Remove check valve, wash with brake cleaner or varsol, air
blow to clean out any debris, reinstall check valve (torque to
22Nm) and retry unit
Cylinder won’t retract
•If unit is an Option 2
The poppet on the two-way solenoid valve might have jammed
in place. Replace valve (torque to 22Nm) and retry unit.
•If unit is an Option 3
If your unit has a manual activation valve, on the return port
there is an orifice to prevent cylinder to come down too quickly.
Orifice might have some debris.
•If unit is an Option 12 or 24
Verify that the solenoid starter operates the directional valve.
Operate actuator back and forth, and make sure it works in
both directions
. If only one direction is working, replace
directional valve.
The motor will not stop running
•Solenoid starter stays on
Low battery or poor ground connection has caused the solenoid
starter to weld on. Replace solenoid starter and check battery
and ground.
Excessive heat from unit
•Low battery or poor ground
A bad electrical ground or poor battery performance will cause
the motor to generate more heat. Verify battery and ground
for good performance.
•Relief valve remains open
If the relief valve has been misadjusted or a debris has stuck in
it, this will generate a lot of heat in the oil. Remove relief valve,
wash with brake cleaner or varsol, air blow to clean out any
debris, reinstall (torque to 22Nm).
•Excessive heat from electrical motor
A bad electrical ground or poor battery performance will cause
motor to generate more heat. Verify battery and ground for
good performance. If these two points have been verified and
motor still generates heat, do not overrun the motor. Consult
Eagle Hydraulic

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OPERATION AND TROUBLESHOOTING GUIDE
If you have verified all the above information in the symptoms and solutions troubleshooting guide, and still have a
problem with your power unit, please consult with Eagle Hydraulic technical department for advice and support.
All unit returns must be authorized by Eagle Hydraulic and must be accompanied by a RGA number.
In the invent that you need to send you power unit back, please make sure that there is no oil left both in the tank and in
the block. Also, if you use ATF oil, please make sure you flush out all the oil from the block before returning your power
unit.
Please contact our customer service at 1-877-382-2850 for additional information.

12055 Arthur-Sicard, Mirabel, Québec, J7J 0E9
[phone] T. [phone] F. [e-mail]
PROUDLY ASSEMBLED AND TESTED
IN CANADA