Eagle Pro EL Series User manual

INSTRUCTION SHEET FOR LOCK NUT CYLINDERS
Repair Parts Sheets for hydraulic hand pumps are available from your nearest authorized
EAGLE PRO Service Center or EAGLE PRO Sales office.
NOTE
PLEASE READ AND FOLLOW THIS INSTRUCTION BEFORE YOU USE EAGLE PRO LOCK NUT
CYLINDERS.
Carefully inspect all components for shipping damage, if shipping damage is found. Please
notify carrier at once. The carrier is responsible for any damage resulting from shipment.
To avoid personal injury or property damage, please follow all safety
precautions. EAGLE PRO cannot be responsible for injury or damage resulting
from unsafe and incorrect products use or system operation, or lack of
maintenance.
DANGER
WARNING
IMPORTANT
is only used when your action or lack of action may cause serious injury or even death.
indicates a potential danger that requires correct action to avoid personal injury.
indicates correct action to prevent damage or equipment failure.
DANGER
Form No. E01104
Rev. A Date: 06.10.2009
EAGLE PRO INDUSTRIES, INC. Form No. E01104 Rev. A Date: 06.10.2009
The hydraulic equipment operator must be a qualified operator must have correct
training and work experience with hydraulic equipment. Lack of knowledge in any of
these areas can lead to equipment damage or personal injury.
Carefully inspect cylinder, coupler, hose and hand pump before using hydraulic
equipment, if you find any damage, please contact with your nearest Authorized
EAGLE PRO Service Center or Sales office. Any damage can cause personal injury when
you use the cylinder.
To avoid personal injury, please do not modify hydraulic equipment without
approval of EAGLE PRO.
Please never lift a more than the rated capacity of the cylinder, overloading causes
equipment failure and serious personal injury.
The cylinder is a load lifting device, not a load holding device. After the load has been
raised or lowered, it must always be held mechanically, never work under a load
supported by a hydraulic unit.
Keep hands and feet away from cylinder and workplace during operation to avoid
personal injury.
NEVER put unbalanced or off-center loads on cylinders. The incorrect load can result in
equipment failure and serious personal injury.
or weld
01 SAFETY
1

2
Please wear safety glasses, helmet and other necessary personal protective equipment
when operating hydraulic equipment
WARNING
EAGLE PRO EL and ELL series Lock Nut cylinders are not equipped with a stop ring to
retain the Piston rod. To prevent piston rod over-extension, a port is provided to vent the
oil out of the cylinder as the piston rod reaches the maximum stroke. When the YELLOW
LINE around the piston rod becomes visible, the piston rod will reach to the maximum
stroke, please stop lifting Once the RED LINE becomes visible, the piston rod has
reached the maximum extension; further extension could damage the seals or result in
the piston rod being forced out of the cylinder (See Figure 1).
NEVER remove the plug or substitute a conventional pipe plug from the piston rod travel
restriction port (See Figure 1).
Tilt saddle (if available) MUST NOT exceed the maximum tilt angle of 5 ° (See Figure 1).
Use cylinder to lift load should have solid lifting surface for correct support. Please select
steel or wood those are capable of supporting the load.
Please install pressure gauge in the system to monitor the operating pressure. The gauge
must have same pressure rating as the pump and cylinder in the system. The wrong
gauge may cause equipment failure and possible personal injury.
Please carefully inspect the cylinder and coupler before use cylinder or shift coupler.
NEVER connect the cylinder with damaged coupler or damaged port threads. The
damaged coupler or damaged port thread may cause equipment failure and possible
.
EAGLE PRO INDUSTRIES, INC. Form No. E01104 Rev. A Date: 06.10.2009

3
02 DESCRIPTION
personal injury.
Change coupler in a clean place; prevent dirt or other debris from entering into cylinder
body or tube. Dirt or other debris will damage the cylinder and result in equipment
failure and possible personal injury.
Before removing or tightening hose or coupler, fully release the hydraulic pressure in
system.
Never handle pressurized hoses; escaping oil under high pressure can penetrate the skin,
causing serious injury. Seek medical aid immediately if injured.
Please use EAGLE PRO oil or other approved hydraulic oil.
For hydraulic technical help or repair service. Please contact the authorized EAGLE PRO
Service Center in your area. EAGLE PRO has no obligations under any warranty with
respect to products that have been repaired by unauthorized personnel, modified, or
damaged through misuse, abuse, accident, neglect, or mishandling.
IMPORTANT
Please keep the cylinder clean all the time.
To reduce cylinder offset loading, optional ST-series tilt saddles are available. Always use
grease underneath tilt saddles.
Keep hydraulic equipment away from flames and heat, Overheating will soften seals and
weakens hose materials, resulting in oil leaking or other equipment failure. Do not use
equipment in temperatures of 65 æ150 ) or higher.
When the cylinder is not in use, please keep the piston rod fully retracts, remove hose
and use rubber cap to cover the coupler.
Please do not drop heavy duty on hose.
Before load, Please fix a saddle into piston rod, saddle will protect the piston rod.
℃℉H
EL-Series
ELA-Series
ELL-Series
Lock Nut Cylinders are Single-acting, high tonnage and load return with an
overflow oil port for stroke restriction. EL cylinders DO NOT have a Stop Ring. EL cylinders
are provided with a fully threaded piston rod and a safety lock nut for positive load holding
operations.
Aluminum Lock Nut Cylinders are Single-acting, low weight and spring return
with a stop ring for stroke restriction. ELA cylinders are provided with a fully threaded piston
rod and a safety lock nut for positive load holding operations.
Pancake Lock Nut Cylinders are Single-acting, low height and load return with an
overflow oil port for stroke restriction. ELL cylinders DO NOT have a Stop Ring. ELL cylinders
are provided with a fully threaded piston rod and a safety lock nut for positive load holding
operations.
EAGLE PRO INDUSTRIES, INC. Form No. E01104 Rev. A Date: 06.10.2009

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04 OPERATION
Before use cylinder, please visually check all units, to make sure there are no damage on
cylinder, port threads, coupler and hose. No oil leaking and shortage of parts. If you find
any problem please stop using your equipment and contact with your nearest authorized
EAGLE PRO Service Center or Sales office.
Use a pump with a release valve or a 3-way valve and one hose to connect with lock nut
cylinder. After connected all parts, please fully hand-tighten all couplers. If not, oil will be
leaked when you operate the equipment.
03 CONNECTION
WARNING:
YELLOW LINE
EAGLE PRO Lock Nut cylinders are not equipped with a stop ring
to retain the Piston rod. When the around the piston rod
becomes visible, please stop lifting immediately; further extension could
damage the seals or result in the piston rod being forced out of the cylinder. Tilt saddle (if
available) must not exceed the maximum tilt angle of 5 ° (See Figure 1).
Figure 2
AB C
4.1 Operate hydraulic pump to advance (see A in figure 2).
4.2 To hold the piston rod, clockwise rotate the Lock nut (see B in figure 2) until reach to the
top of cylinder (see C in figure 2)
4.3 To release the piston rod, Anticlockwise rotate the lock nut until reach to the top of
piston rod
4.4 After finish the work, release the pressure and fully return the piston rod, remove the
hose and cover the coupler by rubber cap.
.
IMPORTANT: EAGEL PRO Lock Nut Cylinder is load return. To reduce the wear
and risk, please use less than the full stroke (stop lifting when the YELLOW
LINE around the piston rod becomes visible.), and use less full capacity when
possible. Do not allow piston rod to rotate when installing adaptors or during the work,
rotating piston rod could damage the seals.
EAGLE PRO INDUSTRIES, INC. Form No. E01104 Rev. A Date: 06.10.2009

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05 HOISTING CYLINDER
WARNING: To avoid equipment failure and possible personal injury, please
always use all of the eye bolts when hoisting cylinder, Lifting straps must be at
a 45 degree or greater angle ( 45°) from horizontal.≥
06 MAINTENANCE
Please always use clean EAGLE PRO oil or other approved hydraulic oil Use other
unapproved oil or dirty oil will damage the cylinders.
Always keep cylinder clean, use dust cap to protect coupler.
After finish work, Cylinder must be fully retracted, cleaned and stored in ventilation,
moist-proof, corrosion-proof place.
.
EAGLE PRO INDUSTRIES, INC. Form No. E01104 Rev. A Date: 06.10.2009

6
Problem
Cylinder will not extend
or fully extend
1.Pump release valve open
2.Couplers not fully tightened
3.Oil level in pump reservoir is low
4.Pump or valve malfunctioning
5.Overload for cylinder
6.Cylinder piston rod binding
1.Fully tighten pump release valve
2.Fully tighten couplers
3.Fill oil in pump
4.Repair or use another pump and valve
5.Change another cylinder with
appropriate capacity
6.Check for dirt or leaks, change the
damage parts
Cause Solution
Cylinder can not
maintain pressure
1.Leaky connection
2.Cylinder seals leaking
3.Release valve not fully closed
4.Pump or valve malfunctioning
1.Clean and reseal thread, tighten connection
2. Replace worn seals. Clean inside cylinder
and use clean hydraulic oil
3. Fully tightening the release valve
4. Repair, or use another pump and valve
Cylinder extends
slower than normal
1. Leaky connection
2. Coupler not fully tightened
3. Pump malfunctioning
1.Clean and reseal thread, tighten
connection
2. Fully tighten couplers
3. Repair or use another pump and
valve
Cylinder extend in dithering
1. Air in system
2. Cylinder piston rod binding
1. Bleeding air in the system
3. Check for dirt or leaks. Check for bent,
misaligned and worn parts
Cylinder leaks hydraulic oil
1. Leaky connection
2. Worn or damaged seals
3. Cylinder damage
1.Clean and reseal thread, tighten
connection
2.Replace worn seals, clean inside cylinder
and use clean hydraulic oil
3. Use new cylinder of contact with your
nearest Authorized EAGLE PRO
Hydraulic Service Center.
Cylinder will not retract or
Retracts slower than normal
1. Pump release valve closed
2. Couplers are not fully tightened
3. Pump reservoir is full
4. Hose is blocked
5.EL cylinders are load return
6. Cylinder damaged
1. 0pen release valve
2.Tightening the couplers
3. Drain hydraulic oil to correct level
4. Clean or change hose
5. Retract cylinder by load
6.Use new cylinder or contact your
nearest Authorized EAGLEPRO
Hydraulic Service Center
07 TROUBLE-SHOOTING
WARNING: EAGLE PRO Cylinders should be repaired only by a qualified
operator or authorized EAGLE PRO Service Center. Repair cylinders without
special tools and knowledge may result in personal injury. Please release
pressure and disconnect hose(s) before making repair.
EAGLE PRO INDUSTRIES, INC. Form No. E01104 Rev. A Date: 06.10.2009