Enerpac BLS Series User manual

1
POWERFUL SOLUTIONS. GLOBAL FORCE.
Instruction Sheet
BLS Series Climbing Jacks
Double-Acting, 690 bar [10,000 psi]
BLS-506, BLS-1006, BLS-1506 and BLS-2006
L4155 Rev. A 3/16
Table of Contents:
1.0 IMPORTANT RECEIVING INSTRUCTIONS ........ 1
2.0 SAFETY ................................... 1
3.0 DIMENSIONS ............................... 3
4.0 PRODUCT SPECIFICATIONS AND FEATURES ..... 5
5.0 PRODUCT DESCRIPTION ..................... 6
6.0 HYDRAULIC POWER SOURCES................ 6
7.0 STROKE SENSOR INSTALLATION. . . . . . . . . . . . . . . 6
8.0 HYDRAULIC CONNECTIONS .................. 7
9.0 SET-UP AND INSPECTION .................... 7
10.0 OPERATION ............................... 7
11.0 RELIEVING TRAPPED PRESSURE ............ 10
12.0 MAINTENANCE ........................... 10
13.0 TROUBLESHOOTING ...................... 10
1.0 IMPORTANT RECEIVING INSTRUCTIONS
Visually inspect all components for shipping damage. Shipping
damage is not covered by warranty. If shipping damage is
found, notify carrier at once. The carrier is responsible for
all repair and replacement costs resulting from damage in
shipment.
2.0 SAFETY
2.1 Introduction
Read all instructions carefully. Follow all recommended safety
precautions to avoid personal injury as well as damage to the
product and/or damage to other property. Enerpac cannot be
responsible for any damage or injury from unsafe use, lack of
maintenance or incorrect operation. Do not remove warning
labels, tags, or decals. In the event any questions or concerns
arise, contact Enerpac or a local Enerpac distributor for
clarification.
If you have never been trained on high-pressure hydraulic
safety, consult your distributor or service center for a free
Enerpac Hydraulic Safety Course.
This manual follows a system of safety alert symbols, signal
words and safety messages to warn the user of specific
hazards. Failure to comply with these warnings could result
in death or serious personal injury, as well as damage to the
equipment or other property.
The Safety Alert Symbol appears throughout this
manual. It is used to alert you to potential physical
injury hazards. Pay close attention to Safety Alert
Symbols and obey all safety messages that follow this symbol
to avoid the possibility of death or serious personal injury.
Safety Alert Symbols are used in conjunction with certain
Signal Words that call attention to safety messages or property
damage messages and designate a degree or level of hazard
seriousness. The Signal Words used in this manual are
DANGER, WARNING, CAUTION and NOTICE.
DANGER Indicates a hazardous situation that, if not
avoided, will result in death or serious
personal injury.
WARNING Indicates a hazardous situation that, if not
avoided, could result in death or serious
personal injury.
CAUTION Indicates a hazardous situation that, if not
avoided, could result in minor or moderate
personal injury.
NOTICE
Indicates information considered important,
but not hazard related (e.g. messages
relating to property damage). Please note
that the Safety Alert Symbol will not be used
with this signal word.
2.2 General Hydraulic Safety Precautions
WARNING
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Do not remove or disable the pump relief valve.
• Never set a relief valve to a higher pressure than the
maximum rated pressure of the pump.
• The BLS Series Climbing Jacks are designed for a maximum
pressure of 690 Bar [10,000 psi]. Do not connect a pump
with a higher pressure rating to these jacks.
• Wear personal protective gear when operating hydraulic
equipment. Always wear eye protection. Safety equipment
such as dust mask, non-skid safety shoes, hard hat, or
hearing protection used for appropriate conditions will
reduce personal injuries.
• Stay clear of loads supported by hydraulics. To avoid
personal injury, keep hands and feet away from jack and
work piece during operation.

2
• Do not handle pressurized hoses. Escaping oil under
pressure can penetrate the skin. If oil is injected under the
skin, see a doctor immediately.
• A jack when used as a load lifting device, should never be
used as a load holding device. After the load has been raised
or lowered, it always must be blocked mechanically.
• Do not pressurize disconnected couplers.
• Only use hydraulic jacks in a coupled system. Never use a
jack with uncoupled couplers. If the jack becomes extremely
overloaded, components can fail catastrophically, causing
severe personal injury.
• Use only rigid pieces to hold loads. Carefully select steel
aluminum or wood blocks (Refer to Section 10.1 for
additional information) that are capable of supporting the
load. Never use a hydraulic jack as a shim or spacer in any
lifting or pressing application.
• When using a single BLS Series jack, avoid situations where
loads are not directly centered on the cylinder tilt swivel.
The load may slip or fall, causing potential danger. Note:
although usable individually, BLS Series jacks are designed
to be used in groups. Multiple BLS Series jacks will be
required for most lifting applications.
• The system operating pressure must not exceed the
pressure rating of the lowest rated component in the system.
Install pressure gauge(s) in the system to monitor operating
pressure. It is your window to see what is happening in the
system.
• Do not exceed equipment ratings. Never attempt to lift a load
weighing more than the capacity of the jack. Overloading
causes equipment failure and possible personal injury.
• Be sure setup is stable before lifting load. Jacks should be
placed on a flat surface that can support the load. Do not weld
or otherwise modify the jack to attach a base or other support.
CAUTION
Failure to observe and comply with the following
precautions could result in minor or moderate personal
injury. Property damage could also occur.
• Avoid damaging hydraulic hose. Avoid sharp bends and
kinks when routing hydraulic hoses. Using a bent or kinked
hose will cause severe back-pressure. Sharp bends and
kinks will internally damage the hose, leading to premature
hose failure.
• Do not drop heavy objects on hose. A sharp impact may
cause internal damage to hose wire strands. Applying
pressure to a damaged hose may cause it to rupture.
• When using a single BLS Series jack, distribute the load
evenly across the entire saddle surface.
• Do not lift hydraulic equipment by the hoses or swivel
couplers. Use the carrying handle or strap.
• Keep hydraulic equipment away from flames and heat.
Excessive heat will soften packings and seals, resulting in
fluid leaks. Heat also weakens hose materials and packings.
For optimum performance, do not expose equipment to
temperatures of 65˚C [150˚F] or higher. Protect all hydraulic
equipment from weld spatter.
• Immediately replace worn or damaged parts with genuine
Enerpac parts. Enerpac parts are designed to fit properly
and to withstand high loads. Non-Enerpac parts may break
or cause the product to malfunction.
NOTICE
• Hydraulic equipment must only be serviced by a qualified
hydraulic technician. For repair service, contact the Enerpac
Authorized Service Center in your area.
• To help ensure proper operation and best performance, use
only Enerpac oil.
2.3 Additional Safety Precautions - BLS Series
Climbing Jacks
WARNING
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Always do a visual check of each jack before placing it into
operation. If any problems are found, do not use the jack.
Have the jack repaired and tested before it is placed into
operation.
• Never use a jack that is leaking oil.
• Always lift the jack using a crane or other suitable lifting
device of sucient rated capacity. Use only the supplied
jack lifting eyes to attach the jack to the lifting device.
• Allow only trained and experienced personnel to supervise
and perform lifting and lowering procedures.
• Be certain that no persons are working on or near any jacks
before lifting or lowering of the load begins. Alert all personnel
in advance that lifting or lowering is about to occur.
• Keep all personnel clear of the work area while lifting or
lowering is in progress.
• Maintain communication with the operator at all times during
lifting or lowering to avoid accidents. Use hand signals, two-
way radios or other appropriate forms of communication (as
required by applicable laws and regulations) if the load is not
visible to the operator.
• Use caution when inserting or removing cribbing blocks
while the jack plunger is extended. Keep hands and fingers
clear of pinch and crush points.
• Never attempt to insert, remove or adjust the position of
cribbing blocks while the jack is lifting or lowering.
• Operate pump and valves as required to ensure that the load
is lifted and lowered evenly.
• Closely watch the load at all times during lifting and lowering.
Stop lifting or lowering immediately if the load becomes
unstable or appears to be lifting or lowering unevenly.
• Use cribbing blocks of the proper material and size for the
jack model being used. Refer to instructions and precautions
contained in Section 10.1. Also refer to Sections 3.1 and 3.2
for cribbing block dimensions.
• If cribbing blocks begin to crush, deform, crack or splinter,
stop lifting or lowering immediately.
• Ensure that the cribbing block column remains straight as
lifting or lowering is in progress. If cribbing blocks begin to
slide, or if the column tilts or leans, stop lifting or lowering
immediately.
• Read and completely understand the safety precautions
and instructions in this manual before operating the jack or
preparing it for use.
• Operating procedures will vary, depending on the pump
being used with the jacks. Always read, follow and
completely understand all manufacturer's instructions when
operating devices used with the jacks. Follow all safety
precautions contained in the manufacturer's manuals.
• Always fully relieve hydraulic pressure before loosening
hydraulic connections or performing any jack disassembly
or repair procedures.
• Always be certain that the load is fully removed from the
jack before performing any jack disassembly or repair
procedures.
• Refer to sections 10.1, 10.2 and 10.3 for additional jack
safety precautions.
• Always read, understand and follow all safety precautions
and instructions, including those that are contained within
the procedures of this manual.

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3.1 Dimensions (Metric)
K
J1L
J1
K
0-5º
J
A
C
B
H
I
M
N
3/8"- 18
NPTF
D
R
F
Model No. BLS Series Climbing Jacks - Dimensions (in millimeters)
A B C D F H I J J1 K R
BLS-506 406 556 318 127 79 56 36 50 240 515 61
BLS-1006 445 606 343 177 95 76 24 71 330 670 61
BLS-1506 472 624 370 203 114 94 39 130 230 475 61
BLS-2006 510 661 387 248 133 102 37 130 270 550 61
NOTICE
Dimensions are approximate and are subject to change without notice.
Lifting eyes and anti-rotation rod are not shown.
Model No.
Cribbing Block Dimensions (in millimeters)
L M N Required Cribbing
Block Material:
BLS-506 565 140 120 Azobe Wood
BLS-1006 720 150 160
BLS-1506 500 140 115 Solid Aluminum or Steel
BLS-2006 575 140 135
NOTICE
Cribbing blocks are not included with jack.
(Side View)
(Bottom View)
3.0 DIMENSIONS

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3.2 Dimensions (Imperial)
K
J1L
J1
K
0-5º
J
A
C
B
H
I
M
N
3/8"- 18
NPTF
D
R
F
Model No. BLS Series Climbing Jacks - Dimensions (in inches)
A B C D F H I J J1 K R
BLS-506 15.98 21.89 12.52 5.00 3.11 2.24 1.42 1.97 9.45 20.28 2.4
BLS-1006 17.52 23.86 13.50 6.97 3.74 2.99 0.94 2.80 12.99 26.38 2.4
BLS-1506 18.58 24.57 14.57 8.00 4.49 3.70 1.54 5.12 9.06 18.70 2.4
BLS-2006 20.08 26.02 15.24 9.76 5.24 4.02 1.46 5.12 10.63 21.65 2.4
NOTICE
Dimensions are approximate and are subject to change without notice.
Lifting eyes and anti-rotation rod are not shown.
Model No.
Cribbing Block Dimensions (in inches)
L M N Required Cribbing
Block Material:
BLS-506 22.24 5.51 4.72 Azobe Wood
BLS-1006 28.35 5.91 6.30
BLS-1506 19.69 5.51 4.53 Solid Aluminum or Steel
BLS-2006 22.64 5.51 5.31
NOTICE
Cribbing blocks are not included with jack.
(Side View)
(Bottom View)

5
2
1
9
8
3
5
10
4
6
7
Figure 1, BLS Series Climbing Jack
Key:
1. Hydraulic Cylinder
2. Tilting Saddle
3. Hydraulic Connection,
3/8" -18 NPTF (raise)
4. Sensor Cable Support Rod
5. Anti-Rotation Rod
6. Hydraulic Connection,
3/8" -18 NPTF (lower)
7. Plunger End Plate
8. Plunger
9. Jack Base Plate
10. Lifting Eye
4.0 PRODUCT SPECIFICATIONS AND FEATURES
Model No. Cylinder
Class
Maximum Cylinder
Capacity
(per lifting point)
Max.
Stroke
Eective
Cylinder Area Oil Capacity Weight Hydraulic Connections
tonnes kN mm cm2cm3
kg
Push Pull Push Pull Push Pull
BLS-506 50 498 103 150 71.2 21.5 1111 335 170 3/8" -18 NPTF
BLS-1006 95 933 435 161 133.0 62.2 2238 1045 315 3/8" -18 NPTF
BLS-1506 140 1386 668 151 198.1 95.4 3090 1488 322 3/8" -18 NPTF
BLS-2006 200 1995 1017 151 285.0 145.3 4332 2209 373 3/8" -18 NPTF
4.2 Specifications (Imperial)
Model No. Cylinder
Class
Maximum Cylinder
Capacity
(per lifting point)
Max.
Stroke
Eective
Cylinder Area Oil Capacity Weight Hydraulic Connections
tons tons in in2in3
lb
Push Pull Push Pull Push Pull
BLS-506 55 55 12 5.91 11.04 3.33 67.80 20.44 375 3/8" -18 NPTF
BLS-1006 105 105 48 6.34 20.66 9.64 136.57 63.77 695 3/8" -18 NPTF
BLS-1506 154 154 74 5.94 30.71 14.79 188.56 90.80 710 3/8" -18 NPTF
BLS-2006 220 220 113 5.94 44.21 22.50 264.35 134.80 825 3/8" -18 NPTF
4.1 Specifications (Metric)
4.3 Major Features and Components

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5.0 PRODUCT DESCRIPTION
5.1 Introduction
Enerpac BLS Series Climbing Jacks overcome the usual
limitation of lift height imposed by the jack’s plunger stroke
length.
Large objects, such as oil tanks, can be lifted, held and lowered
for maintenance without use of a crane.
Features include:
•Double-actinghydrauliccylinderwithsolidplungerdesign.
•Built-intiltsaddleallowsmaximumtiltanglesupto5degrees.
•Largebasewithanti-rotationrodforstabilityandsafety.
•Bakedenamelnishforincreasedcorrosionresistance.
•EnerpacCR-400hydrauliccouplersalloweasyconnections.
5.2 Stage Lifting Overview
For many lifting applications, the jack stroke can not be made
long enough to lift the load to the required height. There is a
direct relationship between the stroke length and the collapsed
height of a jack. This relationship often prevents a jack with the
proper stroke length from also fitting in the required position to
lift the load correctly. When these limitations are experienced,
sometimes stage lifting is the only solution.
Stage lifting is the process of lifting the load to the maximum
stroke of the jack and then “cribbing” or holding, the load at
this point. After this is done and the load is secure, the jack is
retracted, cribbing is then placed under the jack and then the
cycle is repeated. This stage lifting cycle allows the load to be
lifted many times the stroke of the jack and total height is only
limited by the strength and stability of the cribbing system.
The BLS Series Climbing Jacks feature an integral tilt saddle
and plunger end plate. These attachments facilitate the
cribbing application, by providing reaction points for both the
load and the plunger cribbing reaction points.
Although they can be used individually, the BLS Series
Climbing Jacks are most often used as part of a multi-jack
lifting arrangement.
Multi-jack lifting arrangements are typically powered by an
Enerpac split flow pump or by an Enerpac synchronous lifting
system (sold separately).
6.0 HYDRAULIC POWER SOURCES
6.1 Recommended Hydraulic Power Sources
The following hydraulic power sources are recommended for
use with Enerpac BLS Series Climbing jacks:
Enerpac SFP Series split flow pump: The SFP Series
provides multiple hydraulic outlets, each with equal oil flow.
For multi-point lifting applications, a split flow pump is a better
and more convenient alternative to using separately operated
pumps for each jack.
Enerpac EVO Series synchronous lifting system: The EVO
Series is the ultimate system for multi-point stage lifting. It is
capable of powering four, eight or twelve interlinked jacks,
depending on the model chosen. The EVO Series features
nine separate work modes, including a dedicated work mode
designed especially for stage lifting.
Contact your Enerpac distributor for additional information
regarding SFP and EVO Series products.
6.2 Use of Separate Pumps
If desired, each BLS Series Climbing Jack can be powered
by its own separate hydraulic pump. This arrangement, while
permissible, is not recommended. Using separate pumps
will require greater operator oversight to ensure that the load
remains level during lifting or lowering.
When using separate pumps, each pump must be equipped
with a 4-way tandem-center control valve. A locking tandem
center valve is preferred. The pump maximum pressure must
be regulated by a relief valve and must not exceed 690 bar
[10,000 psi].
WARNING It is the user's responsibility to ensure that the
hydraulic power source is suitable for use with the BLS Series
jacks and that it is capable of providing precise control of both
lifting and lowering. Failure to use the proper hydraulic power
source could result in loss of load. Death or serious personal
injury could occur.
7.0 STROKE POSITION SENSOR
If the jacks will be used with an Enerpac EVO Series
synchronous lifting system, stroke position sensors must be
installed at all lifting points. Each BLS Series jack includes
provisions for mounting a stroke position sensor.
NOTICE
Stroke position sensors are available from Enerpac
as optional accessories and are not included with the BLS
Series jacks.
Install the stroke position sensor on each jack as described in
the following steps. Refer to figures 2 and 3.
1. Install the sensor cable support rod to the top of the anti-
rotation rod. Use the supplied M6 x 20 mm bolt. Both the
support rod and bolt are shipped loose with the jack.
2. Place the sensor (with magnetic base) on the top surface
of the jack base plate. Position the sensor so that the end
of the sensor cable is aligned with the support rod.
3. Extend the sensor cable and attach it to the support rod.
Adjust the position of the sensor and sensor cable, so that
the cable is parallel with the anti-rotation rod.
Anti-Rotation
Rod
Sensor Cable
Support Rod
Figure 2, Anti-Rotation Rod and Cable Support Rod

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Stroke
Position
Sensor
Figure 3, Stroke Position Sensor Installation (typical)
8.0 HYDRAULIC CONNECTIONS
WARNING Be certain that hoses are connected at
BOTH cylinder couplers. Never attempt to pressurize the
cylinder if only one hose is connected. Catastrophic failure
of hoses, couplings or cylinder components could occur.
Death or serious personal injury could result.
1. Remove dust covers/rubber plugs from hydraulic couplers.
2. Inspect all threads and fittings for signs of wear or damage
and replace as needed.
3. Clean all threads and fittings.
4. Make hydraulic connections. The jacks are double-acting
(two hoses per jack) and are hydraulically powered in both
directions. The pump or lifting system must be equipped
with a 4-way control valve.
5. Fully hand-tighten all couplers. Loose coupler connections
will block the flow of oil between the pump and the jack.
9.0 SET-UP AND INSPECTION
9.1 Before Operation
• The hydraulic pump or lifting system must include a safety
relief valve to prevent over-pressurizing the jacks. Verify that
the relief valve is set at 690 bar [10,000 psi] maximum.
• If a split flow hydraulic pump is being used, a counterbalance
valve or flow control valve must be installed at each jack in
the circuit. This will allow controlled lowering of the load.
Contact Enerpac for additional information.
• Prior to use, ensure that oil is clean and free of contaminates.
Enerpac recommends a minimum system fluid cleanliness
level in accordance with NAS (National Aerospace Standard)
1638 Class 8.
• With all jacks fully retracted, check the oil level in the
reservoir. Add oil if oil level is low.
• Without load, operate the hydraulic pump to advance and
retract the jack(s) and to purge any air from the system.
Refer to Section 9.2 for additional instructions.
• Check for leaks in system. Have any leaks repaired by
qualified personnel.
9.2 Air Removal
When the hydraulic system is operated for the first time, air will
be trapped in the components. Use the following procedure to
purge this air from the system:
• Lay the jacks on their sides so that the couplers are facing
up. Fully extend and retract the jacks several times, until
operation is smooth. Do this with no load on the jacks and
with the pump positioned higher than the jacks.
• When jacks advance and retract smoothly and without
hesitation, the air has been vented from the system. Fully
retract the jacks after completing this procedure.
NOTICE
Trapped air purged from system components will
be returned to the reservoir. Reservoir oil level may drop. If oil
level is low after purging air, add additional oil to reservoir as
required.
10.0 OPERATION
10.1 Cribbing block Requirements
WARNING Cribbing blocks must be of sucient
strength to support the load and must be of the proper size
and material. Failure to observe the following instructions
and precautions may result in failure of the cribbing blocks.
An unstable load condition, and loss of load could occur.
Death or serious personal injury could result.
Before beginning the lift, ensure that the cribbing blocks to be
used meet the necessary requirements for your jack model:
• Models BLS-506 and BLS-1006: Use only Azobe hardwood
blocks of strength grade D70 (NEN6760).
• To prevent possible splintering, deformation or cracking,
surface pressure must not exceed 13.5N/mm2when using
Azobe wood blocks.
• Models BLS-1506 and BLS-2006: Use only solid aluminum
or steel blocks with these jack models.
NOTICE
Cribbing blocks are not included with the BLS Series
jacks and are to be supplied by the user. Refer to sections 3.1
and 3.2 for required cribbing block dimensions. Be certain that
a sucient quantity of cribbing blocks of the proper material
and size are available to complete the lift.
10.2 Preparing for the Lift
WARNING
Failure to observe the following instructions and
precautions may result in failure of the cribbing blocks.
An unstable load condition, and loss of load could occur.
Death or serious personal injury could result.
• Before beginning the lift, consult with a qualified and
experienced lifting engineer to review the cribbing plan and
to ensure the ground conditions are adequate for the load
being lifted. Use jacks only on a solid and level surface,
capable of supporting the load.
• Determine the maximum ground pressure before beginning
the lift. If the ground is not solid, it may deform when lifting
begins. Instability of the cribbing blocks and possible loss
of load could occur. Refer to Section 10.3 for jack contact
pressure information.
• Consult a qualified and experienced lifting engineer to
determine the maximum allowable cribbing height for your
application.
• If using a single BLS Series Jack, be sure to center the load
on the tilting saddle of the jack.
• Distribute the load evenly when performing lifts with multiple
jacks. Failure to heed this warning may cause loss of load
and/or failure of the jacks.
• Be aware of external events and acts of nature (wind,
storms, flooding, earthquakes or other seismic activity, etc.)
that could occur while the jack is in active use or when the
load is supported by cribbing. Do not use the jack if it is likely
that such conditions will occur.

8
10.3 Contact Pressure
Refer to Table 1 for contact pressure information specific
to each BLS Series jack model. This information must be
supplied to the lifting engineer and any other persons involved
in planning and/or supervising the lift.
The contact pressure is based on the nominal rated load
applied to the jack plunger end plate and base plate. This
measurement is used to determine the force being transferred
to the cribbing blocks and to the ground or other support
surface below.
Before the lift is begun, the lifting engineer must determine the
maximum contact pressure that the ground can withstand at
each lifting point.
WARNING
If any doubt exists regarding whether the ground or
floor can safely support the load to be lifted, the jack(s)
should not be used in that location. Consult a qualified
professional, such as a licensed civil engineer or building
architect If there are any questions or concerns regarding
support surface pressure requirements. Failure to observe
this instruction may cause an unstable lifting arrangement,
resulting in loss of load, personal injury and/or property
damage.
A suitable load spreading plate (user-supplied) of steel or
concrete material should be placed under each BLS jack,
between the ground and the jack. During the lift, the spreading
plate will help to uniformly distribute the pressure transferred to
the ground by the jack and cribbing blocks.
• The material and dimensions of the load spreading plates
are to be determined by a qualified and experienced lifting
engineer.
• Before beginning the lift, check the elevation of each load
spreading plate and make sure that all plates are at the same
height.
• At the beginning of the lift, extend the cylinder plungers to
one-half full stroke. At each jack, check for any deformation
of the load spreading plate and ground.
• If ground is unstable and/or settling under any of the jacks,
provide adequate ground reinforcement before continuing
with the lift. As needed, install spacer plates under the
lowest jacks as required, so that all jacks are positioned
at the same height. These actions must be performed in
accordance with guidance and instructions provided by the
lifting engineer.
• After verifying that the ground is stable and capable of
supporting the load, the lift can be continued.
10.4 Stage Lifting Procedures
WARNING Read and understand all safety precautions
in sections 2.1 and 2.2 of this manual before proceeding
with lifting or lowering. Also refer to the additional safety
information in sections 10.1, 10.2 and 10.3. Failure to follow
the precautions and instructions contained in these
sections may result in death or serious personal injury.
NOTICE
The exact procedures used for lifting and lowering
will vary, depending on the hydraulic power source, number of
lifting points, total lifting height, load characteristics, and other
factors. Use the procedures in sections 10.4.1 and 10.4.2 only
as a guide. It is assumed that multiple jacks will be used.
NOTICE
The hydraulic cylinder contains an internal stop ring
to prevent over-extension of the cylinder rod. However, to
reduce cylinder wear, use less than full stroke and pressure
whenever possible.
10.4.1 Lifting the Load
Lift the load as described in the following steps. Refer to
Figure4, views “A”, “B”, “C” and “D” for reference.
1. Position the jacks under the load at each lifting point.
Place load spreading plates under each jack (refer to
Section 10.3 for additional information). Be certain that the
cylinder plungers are fully retracted. See Figure 4, View A.
2. After all jacks are in position, extend the cylinder plungers
one-half stroke. Verify that the load is being lifted evenly
by the jacks.
3. At each jack, check for any deformation of the load
spreading plate and ground. Refer to Section 10.3 for
additional information.
WARNING If deformation of load spreading plates or
ground is noticed, stop lifting immediately and take
corrective action before continuing. Death or serious
personal injury could occur if the ground settles or
collapses and loss of load occurs.
4. Extend the cylinder plungers an additional amount to
provide sucient clearance for cribbing block installation.
At each jack, insert two outer cribbing blocks under the
jack base plate. See Figure 4, View B.
5. Slowly retract the cylinder plungers until the load is fully
supported by the cribbing blocks.
6. At each jack, check for any deformation of the cribbing
blocks, load spreading plate and ground. Verify that
the load is being lifted evenly. Refer to Section 10.3 for
additional information.
WARNING If deformation of cribbing blocks, load
spreading plate or ground is noticed, stop lifting
immediately and take corrective action before continuing.
Deformations due to ground settling and compression of
cribbing materials could aect alignment of the load. Death
or serious personal injury could occur if cribbing blocks
become unstable, and loss of load occurs.
7. Fully retract the cylinder plungers to provide clearance
under the plunger end plates.
8. At each jack, insert two inner cribbing blocks under the
plunger end plate. See Figure 4, View C.
9. Extend the cylinder plungers and lift the load a sucient
amount to provide clearance for the next set of outer
cribbing blocks to be installed.
Table 1 - Contact Pressure Information - BLS Series Climbing Jacks
Model No. Jack Base
Plate Area
Jack Plunger
End Plate Area Lifting Force Pressure at Jack Base Plate
Pressure at Jack
Plunger End Plate
mm2in2mm2in2kN tons Kg/cm2psi Kg/cm2psi
BLS-506 52400 81.22 57500 89.13 498 56 96.90 1378 88.3 1256
BLS-1006 95600 148.18 107800 167.10 933 105 99.40 1414 88.2 1255
BLS-1506 48000 74.40 52800 81.84 1386 156 294.40 4188 267.7 3807
BLS-2006 67300 104.32 72800 112.84 1995 224 301.80 4293 279.4 3974

9
A
B
CD
A
B
CD
A B
C
D
A B
C
D
Figure 4, Stage Lifting Sequence - BLS Series Climbing Jack
10. At each jack, insert two new outer cribbing blocks under
the jack base plate, placing them crosswise over the
cribbing blocks previously installed in steps 4 and 8. See
Figure 4, View D.
11. Slowly retract the cylinder plungers until the load is fully
supported by the cribbing blocks.
12. At each jack, check again for any deformation of the
cribbing blocks, load spreading plate and ground. Verify
that the load is being lifted evenly. Refer to Section 10.3
for additional information.
13. Fully retract the cylinder plungers to provide clearance
under the plunger end plates.
14. At each jack, insert two new inner cribbing blocks under
the plunger end plate.
15. Repeat steps 2 through 14 as required, until the desired
lifting height is achieved.
At each lifting point, after each lifting cycle is completed:
• Check for deformation of the jack support surface.
• Check for deformation of the cribbing blocks.
• Verify that cribbing blocks remain aligned and that they are
not sliding out of position. Cribbing block column must be
perpendicular to the ground, not tilted or leaning.
• Verify that the load is being lifted evenly.
10.4.2 Lowering the Load
Lower the load as described in the following steps:
1. Extend the cylinder plungers slightly to provide clearance
under the jack base plates, so that the outer cribbing
blocks can be removed.
2. At each jack, remove the two outer cribbing blocks located
immediately under the jack base plate.
3. Slowly retract the cylinder plungers until the jack base
plates are supported by the next lowest set of outer
cribbing blocks.
4. Fully retract the cylinder plungers to provide clearance
under the plunger end plates, so that the inner cribbing
blocks can be removed.
5. At each jack, remove the two inner cribbing blocks located
immediately under the plunger end plate.
6. Repeat steps 1 through 5 until the load is fully lowered.
NOTICE
Load spreading plate is not shown, but may be necessary in certain conditions. Refer to Section 10.3.

10
11.0 RELIEVING TRAPPED PRESSURE
Pressure can sometimes become trapped in a hydraulic jack if
a hose is disconnected before pressure is completely relieved.
If a trapped pressure condition occurs, always use the Enerpac
model CT-604 coupler bleed tool (available from your Enerpac
distributor) to safely relieve the remaining pressure.
WARNING Never attempt to relieve hydraulic pressure
by loosening a coupler. Trapped hydraulic pressure can
cause a loosened coupler to dislodge unexpectedly with
great force. Serious personal injury or death will result if
the coupler becomes a projectile and strikes persons
working in the area.
WARNING Loosening a coupler may result in an
escape of high pressure oil that can penetrate the skin.
Serious personal injury or death could result.
WARNING
Never use a hammer and punch (or other
similar method) to unseat a coupler check ball that is under
pressure. Serious personal injury or death could result due
to the sudden and uncontrolled escape of high pressure
oil.
12.0 MAINTENANCE
1. Use only Enerpac HF hydraulic oil (ISO 32) with the BLS
Series jacks. Enerpac HF oil is available from your Enerpac
distributor or authorized service center.
2. Install dust caps and plugs when the jack is disconnected
from the hydraulic hoses.
3. Keep the jack exterior surfaces clean. Remove any loose
dirt.
4. Keep the cylinder plunger surface clean. An internal wiper
is designed to help maintain plunger cleanliness and
prevent dirt entry. However, an accumulation of dirt on the
plunger surface over a long period of time may damage
the cylinder seal system.
5. Store the jack with the cylinder plunger fully retracted.
When the jack has not used for a period of 30 days, it
should be connected to a pump and fully retracted and
extended a minimum of 5 times. This cycle will lubricate
and keep clean the plunger surface.
6. Inspect the external painted areas of the jack. If any paint
damage is visible, repaint the damaged areas using proper
procedures.
13.0 TROUBLESHOOTING
Refer to the troubleshooting guide when diagnosing jack
operational problems. Please note that the troubleshooting
guide is not all-inclusive, and should be considered only as
an aid to help diagnose the most common possible problems.
For repair service, contact your nearest Enerpac Authorized
Service Center. Only an Enerpac Authorized Service Center
should service the jack and its components.
As required, also refer to the troubleshooting information
provided with your hydraulic pump or power unit.
WARNING
Failure to observe and comply with the following
precautions could result in death or serious personal
injury. Property damage could also occur.
• Never tighten or loosen hydraulic fittings while the hydraulic
system or connected components are pressurized. Escaping
oil under pressure can penetrate the skin, causing serious
personal injury.
• Keep hands, fingers and other body parts clear of pinch
points and moving parts when observing operation during
troubleshooting.
• To prevent accidental start-up of pump during servicing,
always disconnect power before performing any
maintenance or repair procedures.

11
Table 2 - Troubleshooting Chart
Symptom Possible Cause Solution
1. Jack will not advance. a. Directional control valve not
in proper position.
Shift directional control valve to proper position.
b. Coupler not fully tightened. Tighten coupler.
c. Pump oil level is low. Add oil to pump reservoir as required.
d. Pump malfunctioning. Repair or replace pump as required.
e. Load is too heavy for jack. Use a jack with a higher load rating.
f. Cylinder seals leaking. Repair or replace cylinder.
2. Jack advances part way. a. Oil level in pump is low. Add oil to pump reservoir as required.
b. Coupler is not fully
tightened.
Tighten coupler.
c. Cylinder plunger binding. Repair or replace cylinder.
3. Jack advances in spirts. a. Air in hydraulic system. Remove air from hydraulic system. See Section 9.2.
b. Cylinder plunger binding. Repair or replace cylinder.
4. Jack advances slower
than normal.
a. Leaking connection. Repair leaking connection.
b. Coupler not fully tightened. Tighten coupler.
c. Pump malfunctioning. Repair or replace pump as required.
5. Jack advances, but will
not hold.
a. Pump malfunctioning. Repair or replace pump as required.
b. Leaking connection. Repair leaking connection.
c. Incorrect system set-up. Check hose connections at pump and jacks.
d. Cylinder seals leaking. Repair or replace cylinder.
6. Jack leaks oil. a. Worn or damaged cylinder
seals.
Repair or replace cylinder.
b. Internal cylinder damage. Repair or replace cylinder.
c. Loose connection. Tighten or repair connection.

Australia and New Zealand
Actuant Australia Ltd.
Block V Unit 3
P.O. Box 6867
Wetherhill Park, NSW1851
Regents Park Estate
391 Park Road
Regents Park NSW 2143
Australia
T [phone]
F [phone]
[email protected]
Brazil
Power Packer do Brasil Ltda.
Rua
Luiz Lawrie Reid, 548
09930-760
- Diadema (SP) - Brazil
T [phone]
Toll Free: 0800 891 5770
[email protected]
China
Actuant (China) Industries Co. Ltd.
No. 6 Nanjing East Road,
Taicang Economic Dep Zone
Jiangsu, China
T [phone]
F [phone]
Toll Free: [phone]
[email protected]
France, Switzerland, North Africa
and French speaking African
countries
ENERPAC
Une division d’ACTUANT France S.A.S.
ZA de Courtaboeuf
32, avenue de la Baltique
91140 VILLEBON /YVETTE
France
T [phone]
F [phone]
[email protected]
Germany and Austria
ENERPAC GmbH
P.O. Box 300113
D-40401 Düsseldorf
Willstätterstrasse 13
D-40549 Düsseldorf, Germany
T [phone]
F [phone]
[email protected]
India
ENERPAC Hydraulics (India) Pvt. Ltd.
No. 10, Bellary Road,
Sadashivanagar,
Bangalore,
Karnataka 560 080
India
T
[email protected]
www.enerpac.com
Italy
ENERPAC S.p.A.
Via Canova 4
20094 Corsico (Milano)
T [phone]
F [phone]
[email protected]
Japan
Applied Power Japan LTD KK
Besshocho 85-7
Kita-ku, Saitama-shi 331-0821, Japan
T [phone]
F [phone]
[email protected]
Middle East, Egypt and Libya
ENERPAC Middle East FZE
Oce 423, LOB 15
P.O. Box 18004, Jebel Ali, Dubai
United Arab Emirates
T [phone]
F [phone]
[email protected]
Russia
Rep. oce Enerpac
Russian Federation
Admirala Makarova Street 8
125212 Moscow, Russia
T [phone]
F [phone]
[email protected]
Southeast Asia, Hong Kong
and Taiwan
Actuant Asia Pte Ltd.
83 Joo Koon Circle
Singapore 629109
T [phone]
F [phone]
[email protected]
South Korea
Actuant Korea Ltd.
3Ba 717, Shihwa Industrial Complex
Jungwang-Dong, Shihung-Shi,
Kyunggi-Do
Republic of Korea 429-450
T [phone]
F [phone]
[email protected]
Spain and Portugal
ENERPAC SPAIN, S.L.
Avda. Los Frailes, 40 – Nave C & D
Pol. Ind. Los Frailes
28814 Daganzo de Arriba
(Madrid) Spain
T [phone]
F [phone]
[email protected]
Sweden, Denmark, Norway,
Finland and Iceland
Enerpac Scandinavia AB
Kopparlundsvägen 14,
721 30 Västerås
Sweden
T [phone]
[email protected]
The Netherlands, Belgium,
Luxembourg,
Central and Eastern Europe,
Baltic States, Greece, Turkey
and CIS countries
ENERPAC B.V.
Galvanistraat 115, 6716 AE Ede
P.O. Box 8097, 6710 AB Ede
The Netherlands
T [phone]
F [phone]
[email protected]
Enerpac Integrated Solutions B.V.
Spinelstraat 15, 7554 TS Hengelo
P.O. Box 421, 7550 AK Hengelo
The Netherlands
T [phone]
F [phone]
integr[email protected]
South Africa and other English
speaking African countries
Enerpac Africa Pty Ltd.
No. 5 Bauhinia Avenue
Cambridge Oce Park
Block E
Highveld Techno Park
Centurion 0157
Republic of South Africa
T: [phone]
[email protected]
United Kingdom and Ireland
ENERPAC UK Ltd.
5 Coopies Field
Morpeth, Northumberland
NE61 6JR, England
T +44 (0)
1670 5016 50
F [phone]
[email protected]
USA, Latin America and Caribbean
ENERPAC World Headquarters
P.O. Box 3241
Milwaukee WI 53201-3241 USA
T [phone]
F [phone]
User inquiries:
T [phone]
Distributor inquiries/orders:
T [phone]
F [phone]
Technical inquiries:
[email protected]
[email protected]
Enerpac Worldwide Locations e-mail: [email protected] internet: www.enerpac.com
112015
50 00
N86 W12500 Westbrook Crossing
Menomonee Falls, Wisconsin 53051
Toll Free: [phone]
(Taicang)
[phone]
All Enerpac products are
guaranteed against defects
in workmanship and materials
for as long as you own them.
For the location of your nearest
authorized Enerpac Service Center,
visit us at www.enerpac.com