WOOD'S POWR-GRIP FLEXR Series User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBERS: FLEXR4HV11AIR,
FLEXR6HV11AIR, FLEXRL6HV11AIR
SERIAL NUMBER: ___________
(please see serial label and record number here)
FLEXR(L) SERIES FLAT LIFTER
WITH SLIDING ARMS
AIR-POWERED
READ ALL INSTRUCTIONS AND WARNINGS
BEFORE OPERATING THIS LIFTER
DESIGNED FOR THE MATERIALS HANDLING PROFESSIONAL
P.O. Box 368 –908 West Main
Laurel, MT USA 59044
phone [phone]
phone [phone]
fax [phone]

Rev 3.0/7-15 1 FLEXR(L)-HV11AIR: #35036
TABLE OF CONTENTS
SPECIFICATIONS............................................................................................................ 3
WARNINGS ..................................................................................................................... 4
OPERATING FEATURES................................................................................................... 5
ASSEMBLY....................................................................................................................... 6
INTENDED USE ............................................................................................................... 7
LOAD CHARACTERISTICS ................................................................................................... 7
OPERATING ENVIRONMENT ................................................................................................ 8
DISPOSAL OF THE LIFTER................................................................................................... 8
OPERATION .................................................................................................................... 9
BEFORE USING THE LIFTER ................................................................................................ 9
Taking Safety Precautions ............................................................................................................................9
Performing Inspections and Tests .................................................................................................................9
TO CHANGE THE CONFIGURATION OF VACUUM PADS ............................................................ 10
TO APPLY THE PADS TO A LOAD ........................................................................................ 10
Powering up the Lifter................................................................................................................................10
Positioning the Lifter on the Load ...............................................................................................................11
Sealing the Pads against the Load...............................................................................................................11
Reading the Vacuum Gauge .......................................................................................................................11
Vacuum Level on Optimal Surfaces .............................................................................................................12
Vacuum Level on Other Surfaces ................................................................................................................12
TO LIFT AND MOVE THE LOAD........................................................................................... 12
Load Capacity and the Vacuum Gauge ........................................................................................................12
Monitoring the Vacuum Gauge....................................................................................................................13
Controlling the Lifter and Load....................................................................................................................13
In Case of Power Failure ............................................................................................................................13
TO RELEASE THE PADS FROM THE LOAD .............................................................................. 14
About Stand-By Mode ................................................................................................................................14
AFTER USING THE LIFTER ................................................................................................ 14
Storing the Lifter........................................................................................................................................14
MAINTENANCE.............................................................................................................. 15
INSPECTION SCHEDULE ................................................................................................... 15
Every-Lift Inspection ..................................................................................................................................15
Frequent Inspection ...................................................................................................................................15
Periodic Inspection ....................................................................................................................................15
Infrequent Use ..........................................................................................................................................16
TESTING SCHEDULE ........................................................................................................ 16
Operational Tests.......................................................................................................................................16
Load Test ..................................................................................................................................................16
MAINTENANCE SCHEDULE ................................................................................................ 17

Rev 3.0/7-15 2 FLEXR(L)-HV11AIR: #35036
VACUUM PAD MAINTENANCE............................................................................................ 17
Friction Coefficient .....................................................................................................................................17
Inspection .................................................................................................................................................17
Cleaning ....................................................................................................................................................18
VACUUM TEST ............................................................................................................... 18
AIR FILTER MAINTENANCE −LARGE ................................................................................. 19
Filter Function and Conditions Requiring Service ..........................................................................................19
Filter Service Procedures ............................................................................................................................19
AIR FILTER MAINTENANCE −SMALL ................................................................................. 20
Filter Function and Conditions Requiring Service ..........................................................................................20
Filter Service Procedures ............................................................................................................................20
REPLACEMENT PARTS LIST .......................................................................................... 21
LIMITED WARRANTY.................................................................................................... 22

Rev 3.0/7-15 3 FLEXR(L)-HV11AIR: #35036
SPECIFICATIONS
Description:
Designed for use with a crane or other hoisting equipment, the FLEXR(L)-HV11AIR
lifters employ vacuum to hold a load for lifting in the flat orientation.
Model Number:
FLEXR4HV11AIR
(w/4 Vacuum Pads)
FLEXR6HV11AIR
(w/6 Vacuum Pads)
FLEXRL6HV11AIR
(w/6 Vacuum Pads)
Load Capacity:
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces1)
Per-Pad:
300 lbs [136 kg]
300 lbs [136 kg]
200 lbs [91 kg]
Maximum:
1200 lbs [545 kg]
1500 lbs [680 kg]
1200 lbs [545 kg]
Lifter Weight:
100 lbs [46 kg]
125 lbs [57 kg]
145 lbs [66 kg]
Pad Spread:
----------------------------- (to outer edges) -----------------------------
Maximum:
41" x 70¼"
[104 x 178 cm]
41" x 70¼"
[104 x 178 cm]
41" x 105"
[104 x 267 cm]
Minimum:
23" x 54¼"
[58 x 138 cm]
23" x 54¼"
[58 x 138 cm]
23" x 61"
[58 x 155 cm]
Vacuum Pads:2
10" [25 cm] nominal diameter, lipped (Model HV11), standard rubber, spring-
mounted (¾" [20 mm] travel), with #60 filter screen
Power Source:
Compressed air, 80-150 psi [550-1035 kPa] line pressure, 5 SCFM [142 liters/minute]
@ 80 psi [550 kPa]
Vacuum Pump:
Venturi type, 2.8 SCFM [79 liters/minute] nominal vacuum flow @ 80 psi [550 kPa]
Vacuum Reserve Tank:
Vacuum reservoir helps prevent immediate vacuum loss in case of power failure.
Vacuum Gauge:
Dial gauge indicates current vacuum level in positive inches of Hg and negative kPa.
Options:
See separate instructions about optional features.
Operating Elevation:
Maximum = 10,000 feet [3048 meters]
Operating Temperatures: 32° to 120° F [0° to 49° C]
Service Life:
This lifter is designed to have a service life of at least 20,000 lifting cycles, when
used and maintained as intended. Vacuum pads, filter elements and other wear-out
items are excluded; see MAINTENANCE and REPLACEMENT PARTS LIST for more
information. For the DISPOSAL OF THE LIFTER after its service life, see INTENDED USE.
ASME Standard BTH-1:
Design Category "B", Service Class "0" (see www.WPG.com for more information)
!!–CE–!! Note: This symbol appears in the INSTRUCTIONS manual only when requirements of a CE Standard are
different from requirements of other standards that also apply to this vacuum lifter. CE requirements are mandatory
in geographical areas where CE Standards apply, but may be optional in other locations.
1
Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.
2
Options include oil-resistant rubber pads for use on oily surfaces (see REPLACEMENT PARTS LIST).

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WARNINGS
Powr-Grip is pleased to offer the most reliable vacuum lifters available.
Despite the high degree of security provided by this product, certain
precautions must be observed to protect the operator and others.
Always wear personal protective equipment that is appropriate for the material being handled.
Follow trade association guidelines.
Always operate the lifter under conditions approved for its design (see INTENDED USE:
OPERATING ENVIRONMENT).
Never operate a lifter that is damaged, malfunctioning, or missing parts.
Never operate a lifter if the sealing edge of any vacuum pad is cut or otherwise damaged.
Never remove or obscure warning labels.
Never operate a lifter if the Load Capacity or any warning appears to be missing or obscured.
Always make certain the contact surfaces of the load and all vacuum pads are clean prior to
applying the pads (see MAINTENANCE: VACUUM PAD MAINTENANCE).
Never exceed the Load Capacity or attempt to lift loads the lifter is not designed for (see
INTENDED USE: LOAD CHARACTERISTICS).
Never attempt to lift cracked or broken glass with this lifter.
Always position the vacuum pads correctly on the load prior to lifting (see OPERATION: TO APPLY
THE PADS TO A LOAD).
Never lift a load when any vacuum indicator shows inadequate vacuum.
Never touch the vacuum release controls during a lift. This may result in loss of vacuum and
release of the load.
Never allow people to ride on the lifter or the load being lifted.
Never lift a load higher than necessary or leave suspended loads unattended.
Never lift a load over people.
Always keep other personnel far enough away from the lifter to avoid injury in the event of an
unexpected load release.
Always place the power control in the inactive position and, when possible, disconnect the
power source before opening any enclosure on the lifter. (Only applicable to powered lifters)
Always remember that modifications to the lifter may compromise its safety. Wood’s Powr-Grip
cannot be responsible for the safety of a lifter that has been modified by the customer. For
consultation, contact Wood's Powr-Grip (see LIMITED WARRANTY).

Rev 3.0/7-15 5 FLEXR(L)-HV11AIR: #35036
OPERATING FEATURES
Note: Components featured in the following instructions for assembling, operating or
maintaining the vacuum lifter are underlined on their first appearance in each section.
Standard FLEXR6HV11AIR shown.
1 LIFT SPOOL
6 SLIDING PAD ARM
11 AIR SUPPLY VALVE
2 VACUUM CONTROL VALVE
7 AIR FILTER (large)
12 VACUUM GAUGE
3 VACUUM PUMP (venturi)
8 PAD FRAME
13 CONTROL HANDLE
4 MOVABLE PAD MOUNT
9 AIR PRESSURE REGULATOR
14 VACUUM PAD
5 VACUUM RESERVE TANK
and AIR FILTER (small)
15 PARKING STAND/CONTROL HANDLE
10 PRESSURE GAUGE

Rev 3.0/7-15 6 FLEXR(L)-HV11AIR: #35036
ASSEMBLY
1) Open the shipping container and remove all materials for restraining or protecting the vacuum
lifter. Save the container for use whenever the lifter is transported.
2) Suspend the lifter from a crane as follows: Select hoisting equipment (crane and hoist, when
applicable) rated to carry the maximum load weight plus the lifter weight (see
SPECIFICATIONS: Maximum Load Capacity and Lifter Weight).
Note: Any application of the lifter must conform to all statutory or regulatory standards that
relate to the hoisting equipment when used in its geographical location (eg, relevant OSHA
standards in the USA).
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift spool from slipping off under any circumstances.
Attach the hoisting equipment hook to the lift spool and use the hoisting equipment to raise
the lifter out of the shipping container. Be careful to avoid damaging any vacuum pads.
Remove the pad covers and save them for use whenever the lifter is stored.
3) Move the control handles at the ends of the pad frame to the position desired for managing
the load, as follows: Remove the cotterless hitch pin from one handle pivot, and pivot the
handle into the desired position. When the holes for the cotterless hitch pin are aligned, push
the pin through the holes until the retaining ball emerges on the far side of the pivot. Repeat
this procedure for the second handle.
4) Connect the lifter to an appropriate compressed air supply (see SPECIFICATIONS), as follows:
Install the female quick connector (supplied) on the compressed air line. Connect the female
quick connector to the male quick connector leading directly to the air supply valve.
Adjust the air pressure regulator to supply an air pressure of 60 to 80 psi [415 to 550 kPa]:
Move the slide on the air supply valve to the “ON” position, to engage the compressed air
supply. Then pull up the adjustment collar on the top of the regulator, and turn the collar
clockwise to increase pressure or counter-clockwise to reduce pressure, as registered on the
pressure gauge. When the desired adjustment is obtained, push down the collar to lock it in
place.
Make certain the air line is routed so that it does not become tangled, kinked, pinched or cut
while operating the lifter or hoisting equipment (see step 5).
Note: Move the slide on the air supply valve to the “OFF” position when the lifter is not in
use; otherwise, the vacuum pump would continue to consume air, causing the air compressor
to cycle continually.
5) Perform Operational and Load Tests for the lifter as directed in MAINTENANCE: TESTING
SCHEDULE.

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INTENDED USE
LOAD CHARACTERISTICS
WARNING: This lifter is NOT intended for lifting hazardous materials, such as
explosives or radioactive substances.
The operator must verify that the lifter is intended to handle each load, in accordance with the
following requirements:
• The load must not exceed the maximum allowable weight specified under Load Capacity (see
SPECIFICATIONS).
• The load must be a single piece of nonporous or semiporous material with a flat and relatively
smooth contact surface.
3
To determine whether the load is too porous or rough, perform the
test under Vacuum Level on Other Surfaces (see OPERATION: TO APPLY THE PADS TO A LOAD).
• In order to avoid damaging the vacuum pads, the load's surface temperature must not exceed
the allowable Operating Temperatures (see SPECIFICATIONS). However, if such an
application cannot be avoided, Wood's Powr-Grip does offer a heat-resistant rubber
compound and other solutions which may enable you to lift loads with higher surface
temperatures. Contact Wood’s Powr-Grip or an authorized dealer for more information.
•While the minimum length and width of the load are determined by the Pad Spread (see
SPECIFICATIONS), the maximum length and width are determined by the allowable
overhang, or the amount of load material that can extend sideways beyond the vacuum pads
without breaking or otherwise being damaged.
The allowable overhang depends on the kind of load material being lifted, the thickness of the
material, and the angle at which it is handled (if any). Since materials such as glass, stone or
sheet metal each have different physical properties, the allowable overhang must be
evaluated separately for each type of load. If necessary, contact Wood’s Powr-Grip or an
authorized dealer for help in determining the recommended overhang in a specific situation.
Note: Vacuum pads can stain or deform load surfaces with light colors or soft coatings. The
operator should test such surfaces for detrimental effects before using the lifter on them.
3
Lifters that feature concave vacuum pads can also attach to some kinds of curved loads. Since curvature affects the lifting
capacity, contact Wood’s Powr-Grip for help in determining the Load Capacity for a particular curved load.

Rev 3.0/7-15 8 FLEXR(L)-HV11AIR: #35036
OPERATING ENVIRONMENT
The operator must determine whether the lifter is intended to be used in each work environment,
in accordance with the following restrictions:
WARNING: Never use lifter in dangerous environments.
• This lifter is not intended for use in any environment that is inherently dangerous to the
operator or likely to compromise the lifter's ability to function. Environments containing
explosives, caustic chemicals and other dangerous substances must be avoided when using
the lifter.
• The lifter's work environment is limited by the Operating Elevation and Operating Temperatures
indicated in SPECIFICATIONS.
• The lifter's work environment must be free of metal particles or any other contaminates that
could damage lifter components through airborne contact or any other means of transmission
in the environment. If such contaminates cause a vacuum pump failure, they could result in a
load release and possible injury to the operator or others nearby.
WARNING: Environmental contaminates could result in vacuum pump failure.
• Using the lifter in wet environments may require the operator to take special precautions:
Although the lifter's exterior surfaces can tolerate some exposure to water vapor, they are not
designed to be water-tight. Submerging the lifter or using it in rain may damage lifter
components; these and similar conditions must be avoided.
• !!–CE–!! If the lifter is employed in a construction area, CE Standard EN 13155 requires the
use of a secondary positive holding device, such as a sling system, designed to support the
load in case of a vacuum system failure.
WARNING: Where CE Standards apply, secondary positive holding device is
required for lifting loads in construction zones.
DISPOSAL OF THE LIFTER
After the vacuum lifter has reached the end of its service life, you must dispose of the lifter in
compliance with all local codes and regulatory standards that are relevant for the geographical
region.

Rev 3.0/7-15 9 FLEXR(L)-HV11AIR: #35036
OPERATION
BEFORE USING THE LIFTER
The operator must determine whether the lifter is capable of performing each intended task, in
accordance with the SPECIFICATIONS and INTENDED USE sections of this INSTRUCTIONS
manual. In addition, all of the following preparations must be completed prior to lifting any load.
Taking Safety Precautions
The operator must be trained in all relevant industry and regulatory standards for the operation
of the vacuum lifter in its geographical location (eg, ASME B30.20 in the USA).
The operator must read and understand this INSTRUCTIONS manual, including all WARNINGS ,
before using the lifter. If necessary, contact Wood’s Powr-Grip or an authorized dealer for
assistance.
WARNING: Always wear appropriate personal protective equipment.
The operator must wear any personal protective equipment and take any other precautions
required to handle the load safely. Consult appropriate trade association guidelines to determine
what precautions are necessary for each type of load material.
Performing Inspections and Tests
Perform all inspections and tests required by the INSPECTION and TESTING SCHEDULES (see
MAINTENANCE). In addition, if the lifter has been in storage, always conduct a VACUUM TEST
before placing it in service (see MAINTENANCE).
CAUTION: Examine each air filter regularly, and empty when necessary.
The lifter is equipped with one or more air filters to help protect the vacuum system from
contaminants. In order for a filter to function, the operator must empty the filter bowl before
enough liquid accumulates to contact any portion of the filter element (see MAINTENANCE: AIR
FILTER MAINTENANCE).

Rev 3.0/7-15 10 FLEXR(L)-HV11AIR: #35036
TO CHANGE THE CONFIGURATION OF VACUUM PADS
The lifter can accommodate various load dimensions, depending on the position of the sliding
pad arms and movable pad mounts on the pad frame (see illustration in OPERATING FEATURES).
Move the pad arms and pad mounts inward or outward on the pad frame as needed to provide
adequate support across the load surface. The vacuum pads must be arranged symmetrically, to
keep the lifter balanced.
WARNING: Make sure all vacuum hoses are coiled or routed so they do not
become entangled, kinked or punctured.
To position a pad arm, remove the cotterless hitch pin from the arm’s sliding mount. While
making sure the vacuum hose does not get pinched, slide the arm to the desired position and
align the holes for the pin. Push the pin through the holes until the retaining ball emerges on the
far side of the arm mount. On the opposite end of the
pad frame, position the second sliding pad arm at an
equal distance from the center of the lifter.
To position each set of vacuum pads on a pad arm,
remove the cotterless hitch pins from the pad mounts,
move the pads inward or outward equal distances on the
pad arm, and secure them with the cotterless hitch pins.
Before applying the vacuum pads to a load, make sure
that all vacuum hoses are properly connected and will
not interfere with lifter operation.
TO APPLY THE PADS TO A LOAD
Powering up the Lifter
Make sure the lever on the vacuum control valve is in the center position (see TO RELEASE THE
PADS FROM THE LOAD: About Stand-By Mode to follow). Move the slide on the air supply valve to
the “ON” position, to engage the vacuum pump. The lifter is designed for the vacuum pump to
run continuously.
WARNING: Never place air supply valve in "OFF" position while operating lifter;
keep pump running throughout lift.
The supply valve must remain in the “ON” position while operating the lifter. Any interruption of
the vacuum flow during lifter operation could result in the release of the load and possible injury
to the operator (see TO LIFT AND MOVE THE LOAD: In Case of Power Failure to follow).

Rev 3.0/7-15 11 FLEXR(L)-HV11AIR: #35036
Positioning the Lifter on the Load
Make certain that the contact surfaces of the load and all vacuum pads are free of any
contaminates that could harm the pads or prevent them from sealing against the load (see
MAINTENANCE: VACUUM PAD MAINTENANCE).
4
WARNING: To avoid accidental load release, always center lifter’s pad frame on
load.
Center the lifter’s pad frame to within 2" [5 cm] of the load center, since off-center loading could
result in a load release and possible injury to the operator, and it may also damage the lifter.
5
Make sure that all vacuum pads will fit entirely on the load’s contact surface (see
SPECIFICATIONS: Pad Spread) and that they will be loaded evenly while lifting (see
SPECIFICATIONS: Per-Pad Load Capacity). Then lower the lifter onto the load until all pads are
touching the contact surface.
Sealing the Pads against the Load
Move the lever on the vacuum control valve to the “APPLY” position: Pull upward on the lever's
knob, move the lever all the way forward (away from operator) and release it. This position
opens the lifter’s vacuum lines to the airflow created by the vacuum pump, causing air to be
drawn immediately at the vacuum pads.
6
Apply the lifter to the load until all the pads seal
against it.
WARNING: Keep valve lever in “APPLY” position throughout lift.
The valve lever must remain in the “APPLY” position throughout the entire lift. Any interruption
of the vacuum flow during lifter operation could result in the release of the load and possible
injury to the operator.
Note: If a vacuum pad has been lying against a hard object (as during shipping), it may be
slightly distorted. Although initially it may be difficult to apply the pad to a load, this condition
should correct itself with continued use.
Reading the Vacuum Gauge
The vacuum gauge indicates the current vacuum level in the lifter’s vacuum system. The green
range indicates vacuum levels sufficient for lifting the maximum load weight, whereas the red
range indicates vacuum levels that are not sufficient for lifting the maximum load weight. The
gauge needle should show a sudden surge in vacuum as the vacuum pads seal against the load.
If it takes more than 5 seconds for the vacuum level to reach 5" Hg [-17 kPa], press on any pad
that has not yet sealed.
4
Since oil damages the rubber in standard pads, the load surface must be free of oil unless the lifter is equipped with optional
oil-resistant pads, which may be used on oily surfaces (see REPLACEMENT PARTS LIST).
5
The lifter is designed to handle the maximum load weight (see SPECIFICATIONS: Maximum Load Capacity) when the load’s
center of gravity is positioned within 2" [5 cm] of the pad frame’s center point. Occasional loading deviations are permissible,
provided that the operator can maintain control of the load at all times and that the load weight is low enough to avoid damaging
the lifter.
6
To minimize the time it takes for the lifter to attach and obtain full vacuum, do not place the valve lever in the “APPLY” position
until the vacuum pads are contacting the load.

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Vacuum Level on Optimal Surfaces
When the lifter is attached to clean, smooth, nonporous load surfaces, it should be able to
maintain a vacuum level in the green range on the vacuum gauge, except when used at high
elevations (see SPECIFICATIONS: Operating Elevation). If not, perform the VACUUM TEST (see
MAINTENANCE) to determine whether there is a deficiency in the vacuum generating system.
Vacuum Level on Other Surfaces
When the lifter is attached to contaminated, rough or porous load surfaces, it may not be able to
maintain a vacuum level in the green range on the vacuum gauge, due to leakage in the seal
between the vacuum pads and the load surface. In the case of contamination, thoroughly clean
the contact surfaces of the load and the vacuum pads (see MAINTENANCE: VACUUM PAD
MAINTENANCE: Cleaning), and reapply the lifter to the load. If the load has rough or porous
surfaces, the operator must conduct a test to determine whether the lifter is designed
to lift the load , as follows:
1) Make sure the lifter's vacuum generating system is functioning correctly (see MAINTENANCE:
VACUUM TEST).
2) Apply the vacuum pads to the load as previously directed.
3) When the vacuum level registers above 16" Hg [-54 kPa] on the vacuum gauge (see TO LIFT
AND MOVE THE LOAD: Load Capacity and the Vacuum Gauge to follow), disconnect the power
source.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Monitor the vacuum gauge while the load is suspended for 5 minutes: The lifter must
maintain a minimum vacuum level of 10" Hg [-34 kPa] during this time. If not, the
load does not possess the characteristics required for using this lifter.
7
TO LIFT AND MOVE THE LOAD
Load Capacity and the Vacuum Gauge
The lifter's Load Capacity is rated at a vacuum level of 16" Hg [-54 kPa] (see SPECIFICATIONS).
Vacuum higher than this level registers in the green range on the vacuum gauge, to indicate that
the lifter is ready to lift the maximum load weight.
WARNING: Never attempt to lift load unless vacuum level registers higher than
16" Hg [-54 kPa].
Do not attempt to lift the load while vacuum registers lower than 16" Hg [-54 kPa]; such an
attempt could result in a load release and possible injury to the operator.
7
Certain load materials are too rough or porous to allow the lifter to form a seal which can be maintained for 5 minutes without
power. However, in geographical locations where CE Standards do not apply, it may be possible to use the lifter to lift such loads.
Contact Wood’s Powr-Grip for more information.

Rev 3.0/7-15 13 FLEXR(L)-HV11AIR: #35036
Monitoring the Vacuum Gauge
The vacuum gauge must remain completely visible to the operator, so that it can be monitored
throughout the entire lift.
WARNING: Vacuum gauge must be visible to operator throughout entire lift.
The lifter’s vacuum pump runs continuously to maintain sufficient vacuum for lifting the
maximum load weight. If the vacuum system experiences leakage while the lifter is attached to
the load, the vacuum gauge signals the reduction in vacuum to the operator. Make sure the
vacuum gauge shows a vacuum level of 16" Hg [-54 kPa] or higher while you are lifting a load.
If not, move away and stay clear of the load until it can be lowered to the ground or a stable
support.
WARNING: Stay clear of any suspended load while vacuum level is lower than
16" Hg [-54 kPa].
Discontinue lifter use until the cause of the vacuum loss can be determined. If the vacuum level
remains lower than 16" Hg [-54 kPa] when the lifter is attached to clean, smooth, nonporous
materials, the leakage is likely to be in the vacuum system. In this event, perform the VACUUM
TEST (see MAINTENANCE) and inspect the vacuum pads for damage (see MAINTENANCE: VACUUM
PAD MAINTENANCE: Inspection). If the vacuum loss cannot be remedied immediately, perform
inspection and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.
Controlling the Lifter and Load
When the vacuum gauge shows that the lifter is ready, use the
hoisting equipment to raise the lifter and load as needed to
clear any obstacles in their path. Use the control handles to
keep the lifter and load in the desired orientation while they are
suspended from the crane.
Note: Depending on the arrangement of sliding pad arms and movable pad mounts, the pad
frame may extend beyond the edges of smaller loads. When moving such loads, be careful to
avoid any obstacles to the pad frame, as well as to the load.
In Case of Power Failure
The lifter is equipped with a vacuum reserve tank, designed to maintain vacuum temporarily in
case of a power failure.
WARNING: Stay clear of any suspended load in the event of a power failure.
Although the lifter is designed to support the load for at least 5 minutes without power, this
depends on many factors, including the condition of the load and the lifter’s vacuum system (see
INTENDED USE: LOAD CHARACTERISTICS and MAINTENANCE: VACUUM PAD MAINTENANCE,VACUUM
TEST). If a power failure occurs, keep all personnel clear of the suspended load until it can safely
be placed on the ground or a stable support. Correct any deficiency before resuming normal
operation of the lifter.

Rev 3.0/7-15 14 FLEXR(L)-HV11AIR: #35036
TO RELEASE THE PADS FROM THE LOAD
WARNING: Load must be fully supported before releasing vacuum pads.
When the load is at rest and fully supported, move the lever on the vacuum control valve to the
"RELEASE" position: Pull upward on the lever's knob, move the lever all the way back (towards
operator) and then release it. This forces air into the vacuum pads, quickly breaking the vacuum
seal. After the pads have disengaged completely from the load, move the lifter away. Then
place the lifter in stand-by mode as directed in the following discussion.
About Stand-By Mode
The lifter's vacuum control valve features a neutral position that reduces the amount of time
required for the lifter to attach to a load and obtain full vacuum. To utilize this feature, pull
upward on the lever's knob, move the lever to the center position and then release it. Placing
the valve lever in the center position closes off the vacuum line that connects the vacuum pads
to the vacuum generating system, causing vacuum to build up in the line.
WARNING: Never move valve lever to center position while lifter is supporting
load.
Stand-by mode may only be used when the lifter is not supporting a load. The operator must
never move the valve lever to the center position while the lifter is supporting a load, because
this could result in a load release and possible injury to the operator.
AFTER USING THE LIFTER
Move the slide on the air supply valve to the “OFF” position.
CAUTION: Do not set the lifter against any surfaces which could soil or damage the
vacuum pads.
The control handles can be used as parking stands when an unloaded lifter is not suspended
from a crane: Secure the handles in position, pointing straight down from the pad frame (see
ASSEMBLY). Use the hoisting equipment to gently lower the lifter until the parking stands
support its entire weight; then detach the hoisting equipment hook from the lift spool.
If the lifter is transported to another location, use the original shipping container and secure the
lifter so as to protect the vacuum pads and all other components from damage while in transit.
Storing the Lifter
Use the covers supplied to keep the vacuum pads clean.
!!–CE–!! In accordance with CE Standard EN 13155, the lifter is designed to rest on relatively
horizontal surfaces without tipping over. To store the lifter in this way, set the lifter with the
pads facing downward on a clean, smooth, flat surface.

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MAINTENANCE
WARNING: Make sure power source is disconnected before servicing lifter.
Note: One or more wiring/hose routing diagrams may be provided in the final section of this
INSTRUCTIONS manual for reference when servicing the lifter or trouble-shooting a deficiency.
INSPECTION SCHEDULE
Perform inspections routinely, according to the following frequency schedule:
Every-Lift Inspection
• Examine the vacuum pads and load surface for contamination or debris (see VACUUM PAD
MAINTENANCE to follow).
• Examine the vacuum pads, controls and indicators for visual damage (see VACUUM PAD
MAINTENANCE to follow).
If any deficiency is detected during the inspection, correct it before using the lifter and perform
the Frequent Inspection to follow.
Frequent Inspection
( following every 20-40 hours’ use; or whenever lifter is out of service for 1 month or more )
• Examine the lifter’s structure for visual damage.
• Examine the vacuum system (including vacuum pads, fittings and hoses) for visual damage.
• Examine the air filter for conditions requiring service (see AIR FILTER MAINTENANCE to follow).
• Perform the VACUUM TEST to follow.
• Check for unusual vibrations or noises while operating the lifter.
If any deficiency is detected during the inspection, correct it before using the lifter and perform
the Periodic Inspection to follow.
Periodic Inspection
( following every 250-500 hours’ use; or whenever lifter is out of service for 1 year or more )
• Examine the entire lifter for external evidence of looseness, excessive wear, deformation,
cracks, excessive corrosion, dents to structural or functional components, cuts, or any
deficiency which might constitute a hazard.
• If the lifter runs on AC electrical power, inspect all parts of the electrical system for damage,
wear or contamination that could constitute a hazard, in compliance with all local codes and
regulatory standards that are relevant for the geographical region.
CAUTION: Be sure to use appropriate cleaning methods for each type of electrical
component, as specified by codes and standards. Improper cleaning
can damage components.
• Keep a written record of all Periodic Inspections.

Rev 3.0/7-15 16 FLEXR(L)-HV11AIR: #35036
If any deficiency is detected during the inspection, correct it before using the lifter. If necessary,
return the lifter to Wood’s Powr-Grip or an authorized dealer for repair (see LIMITED
WARRANTY).
Infrequent Use
If a lifter is used less than 1 day in a 2-week period, perform the Periodic Inspection each time
before using the lifter .
TESTING SCHEDULE
Perform these tests when placing the lifter in service initially and each time following a repair or
modification . Correct any deficiency and retest before using the lifter.
Operational Tests
• Perform the VACUUM TEST to follow.
• Test all features and functions of the lifter (see OPERATING FEATURES, OPERATION and
MAINTENANCE).
Load Test
Prove that the lifter can lift 100% of its Maximum Load Capacity (see SPECIFICATIONS), using an
actual load or an equivalent simulation.
8
Employ the following method to test with an actual
load:
1) Place a test load with appropriate LOAD CHARACTERISTICS (see INTENDED USE) on a stable
support. Make sure the load is oriented in the upright position.
9
2) Apply the vacuum pads to the load as previously directed.
3) When the vacuum level registers above 16" Hg [-54 kPa] on the vacuum gauge, turn off or
disconnect the power source (as appropriate).
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Hold the load for 5 minutes. The load must not slip or fall during this time period. If it does,
conduct a VACUUM TEST and inspect each vacuum pad as indicated under VACUUM PAD
MAINTENANCE: Inspection (see sections to follow). Correct any deficiency that is found and
retest the lifter.
Note: See MAINTENANCE topics to follow for additional directions about inspecting and testing
specific lifter components.
8
ASME Standard B30.20 requires the lifter to be tested to 125% of its Load Capacity.
9
Flat Lifters are exempt from this requirement.

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MAINTENANCE SCHEDULE
Unless specified elsewhere in this INSTRUCTIONS manual, the lifter does not require
maintenance on a routine basis. Instead, maintenance must be performed whenever a
deficiency is indicated by routine inspections or tests. Any maintenance warranted must be
performed before resuming normal operation of the lifter.
VACUUM PAD MAINTENANCE
Friction Coefficient
The friction coefficient represents the lifter's ability to resist load slippage when the load is
oriented in any position except horizontal. If the contact surfaces of either the load or the
vacuum pads are not clean, dry and in good condition, slippage is more likely to occur.
The Load Capacity of most Powr-Grip lifters is based on a friction coefficient of 1 (only Flat Lifters
are exempt from this requirement). However, a vacuum pad's ability to maintain this friction
coefficient is reduced by factors such as contamination, wear, age and exposure to sunlight, as
well as the condition of the load's contact surface (see INTENDED USE: LOAD CHARACTERISTICS).
Pads that have surface contamination must be thoroughly cleaned (see Cleaning discussion to
follow). Over time, the rubber in a pad may experience hardening or leaching of chemicals,
resulting in stiffness or surface glaze. Pads that exhibit wear, stiffness or glaze must be replaced.
In addition, all pads should be replaced on a regular basis, preferably after no more than 2 years,
to ensure that the friction coefficient is not compromised. If necessary, contact your dealer or
Wood's Powr-Grip for more information.
Inspection
Inspect each vacuum pad for the following deficiencies routinely, as directed in the preceding
INSPECTION and TESTING SCHEDULES. Correct any deficiency before using the lifter.
• Contaminates on the pad face or sealing edges: Soil build-up can prevent pads from sealing
adequately or reduce the friction coefficient (see discussion preceding). Follow the directions
to clean pads as necessary (see discussion to follow).
• Filter screen missing from pad face: This screen helps prevent debris from plugging the
vacuum hose and the air filter. Replace any missing screen immediately (see REPLACEMENT
PARTS LIST).
• Nicks, cuts or abrasions in sealing edges: Pad damage can reduce the lifting capacity of the
lifter. Replace any damaged pad immediately (see REPLACEMENT PARTS LIST).
10
WARNING: Replace vacuum pad if sealing edge has any nicks, cuts or abrasions.
• Wear, stiffness or glaze: See Friction Coefficient preceding. Replace any pad that exhibits
wear, stiffness or glaze (see REPLACEMENT PARTS LIST).
10
If the lifter is equipped with VPFS10T or VPFS625 pads, the sealing edge is the replaceable sealing ring. When it is damaged,
see TO REPLACE SEALING RING INSERT IN VACUUM PAD to follow.

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Cleaning
Regularly clean the face of each vacuum pad to remove oil, dust and any other contaminates.
Acceptable cleaning agents include soapy water and other mild cleansers. Do not use solvents,
petroleum-based products (including kerosene, gasoline and diesel fuel) or any harsh chemicals
for cleaning. Do not use unauthorized rubber cleaners or conditioners, such as those intended
for cleaning tires or vinyl surfaces, because those products can leave a hazardous film on vacuum
pads which significantly reduces their lifting capacity (see Friction Coefficient preceding). The
use of any unauthorized cleaning agent is prohibited because it could damage the pad and/or
create a hazard to the operator or others.
WARNING: Never use solvents, gasoline or other harsh chemicals to clean
vacuum pad.
WARNING: Never use unauthorized rubber cleaners or conditioners to clean
vacuum pad.
To prevent liquid from contaminating the vacuum system during cleaning, cover the suction hole
in the recess for the filter screen or make sure the pad faces downward. Use a clean sponge or
lint-free cloth to apply an authorized cleanser and wipe the pad face clean. A toothbrush (or
similar brush with bristles that do not harm rubber ) may be used to remove contaminates
clinging to sealing edges.
11
Wipe all residue from the pad face, and allow the pad to dry
completely before using the lifter.
VACUUM TEST
Test the vacuum system for leakage routinely, as directed in the preceding INSPECTION and
TESTING SCHEDULES.
1) Clean the face of each vacuum pad as previously directed (see VACUUM PAD MAINTENANCE:
Cleaning).
2) Apply the lifter to a clean, smooth, nonporous surface. The surface should be flat or possess
no more curvature than the lifter is designed for (if any).
12
3) When the vacuum level registers above 16" Hg [-54 kPa] on the vacuum gauge, turn off or
disconnect the power source (as appropriate) and leave the pads attached to the surface.
4) Monitor the vacuum gauge: The vacuum level should not decrease by more than 4" Hg [-14
kPa] in 10 minutes.
WARNING: If lifter fails vacuum test, discontinue use immediately.
Correct any deficiency in the vacuum system before using the lifter. Contact Wood’s Powr-Grip
or an authorized dealer for assistance.
11
If these cleaning methods are not successful, contact Wood’s Powr-Grip or an authorized dealer for assistance.
12
Any test material used must be fully and independently supported, and capable of bearing the lifter’s weight. Do not use the
lifter to lift the test material during the vacuum test.