WPG MR1611LDC User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBER: MR1611LDC
SERIAL NUMBER: ___________
(please see serial label and record number here)
MANUAL ROTATOR 2800
DC-VOLTAGE
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 34.7/3-20 1 MR1611LDC: #35050
TABLE OF CONTENTS
SPECIFICATIONS............................................................................................................ 3
WARNINGS ..................................................................................................................... 4
OPERATING FEATURES................................................................................................... 5
ASSEMBLY....................................................................................................................... 6
TO SET UP THE LIFTER ................................................................................................................6
TO CHANGE THE PAD FRAME CONFIGURATION ................................................................................7
To Install (and Remove) the Lift Bar Extension ..............................................................................................8
To Install (and Remove) the Optional Short Lift Bar .......................................................................................8
To Install (and Remove) the Removable Sections of the Pad Frame ................................................................8
To Install (and Remove) Removable Pad Arms ..............................................................................................9
To Rotate Rotating Pad Arms........................................................................................................................9
INTENDED USE ............................................................................................................. 10
LOAD CHARACTERISTICS ........................................................................................................... 10
OPERATING ENVIRONMENT .......................................................................................................11
DISPOSAL OF THE LIFTER ..........................................................................................................11
OPERATION .................................................................................................................. 12
BEFORE USING THE LIFTER........................................................................................................12
Taking Safety Precautions ..........................................................................................................................12
Performing Inspections and Tests ...............................................................................................................12
Confirming the Pad Frame Configuration .....................................................................................................13
Preparing to Use the Optional Remote Control System .................................................................................13
TO ATTACH THE PADS TO A LOAD................................................................................................14
Powering up the Lifter................................................................................................................................14
Positioning the Lifter on the Load ...............................................................................................................14
Sealing the Pads against the Load...............................................................................................................15
Reading the Vacuum Gauge .......................................................................................................................16
Vacuum Level on Optimal Surfaces .............................................................................................................16
Vacuum Level on Other Surfaces ................................................................................................................16
TO LIFT AND MOVE THE LOAD ....................................................................................................17
Load Capacity and the Lift Light..................................................................................................................17
Monitoring Vacuum Indicators ....................................................................................................................17
Monitoring the Low Vacuum Warning Buzzer (if applicable) ..........................................................................18
Controlling the Lifter and Load....................................................................................................................18
In Case of Power Failure ............................................................................................................................18
TO ROTATE THE LOAD............................................................................................................... 19
TO RELEASE THE PADS FROM THE LOAD .......................................................................................20
AFTER USING THE LIFTER.......................................................................................................... 21
Storing the Lifter........................................................................................................................................21

Rev 34.7/3-20 2 MR1611LDC: #35050
MAINTENANCE ............................................................................................................. 22
INSPECTION SCHEDULE.............................................................................................................22
Every-Lift Inspection ..................................................................................................................................22
Frequent Inspection ...................................................................................................................................22
Periodic Inspection.....................................................................................................................................22
Infrequent Use...........................................................................................................................................23
TESTING SCHEDULE..................................................................................................................23
Operational Tests.......................................................................................................................................23
Load Test ..................................................................................................................................................23
MAINTENANCE SCHEDULE..........................................................................................................24
BATTERY TEST .........................................................................................................................24
BATTERY RECHARGE .................................................................................................................25
VACUUM PAD MAINTENANCE......................................................................................................26
Friction Coefficient .....................................................................................................................................26
Inspection .................................................................................................................................................26
Cleaning ....................................................................................................................................................26
VACUUM TEST .........................................................................................................................27
REMOTE CONTROL SYSTEM TEST .......................................................................................................................28
AIR FILTER MAINTENANCE −LARGE ...........................................................................................29
Filter Function and Conditions Requiring Service ..........................................................................................29
Filter Service Procedures ............................................................................................................................29
VACUUM PUMP MAINTENANCE ―THOMAS 2907CDC22/12 ..........................................................30
Replacing a Diaphragm (1) .........................................................................................................................30
Replacing an Intake Valve Flapper (6) .........................................................................................................30
Replacing a Set of Exhaust Valve Flappers (9 & 10) and a Head Gasket (12) .................................................30
VACUUM PUMP MAINTENANCE −DYNAFLO DV1032102 ...............................................................31
Replacing the Diaphragm ...........................................................................................................................31
Replacing the Head Assembly .....................................................................................................................31
VACUUM SWITCH ADJUSTMENT ..................................................................................................32
Vacuum Switch Function ............................................................................................................................32
Conditions Requiring Readjustment .............................................................................................................32
Adjustment Procedure ................................................................................................................................33
REPLACEMENT PARTS LIST .......................................................................................... 34
LIMITED WARRANTY.................................................................................................... 35

Rev 34.7/3-20 3 MR1611LDC: #35050
SPECIFICATIONS
Model Number:
MR1611LDC
Description:
Designed for use with a crane or other hoisting equipment, the MR1611LDC lifter employs
vacuum to hold a load for lifting, and it provides manual 360° rotation movements for load
manipulation.
Power Source:
12 volts DC, 26 amps
Battery Capacity:
26 amp-hours
Vacuum Pads:
Sixteen 11" [28 cm] nominal diameter, lipped (Model G3370), standard rubber, spring-
mounted (¼" [7 mm] travel), with #60 filter screen
Pad Spread:1(to outer edges)
Minimum
Maximum
Length:
40¾" [103 cm]
169" [430 cm]
Width:
12" [30 cm]
49" [125 cm]
Load Capacity:1
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces2)
Per-Pad:
175 lbs [79.5 kg]
Maximum (w/4 pads):
700 lbs [320 kg]
Maximum (w/16 pads):
2,800 lbs [1,270 kg]
Lifter Weight:
685 lbs [311 kg]
Rotation Capability:
Manual, 360°, with automatic locking at each ¼ revolution (when desired)
Vacuum Pumps:
2 diaphragm type, 1 SCFM [28 liters/minute] nominal airflow or
1 diaphragm type, 3 SCFM [85 liters/minute] nominal airflow
Vacuum Reserve Tank:
Vacuum reservoir helps prevent immediate vacuum loss in case of power failure and extends
battery life by reducing pump cycles required to maintain vacuum.
Vacuum Gauge:
Dial gauge indicates current vacuum level in positive inches of Hg and negative kPa.
Vacuum Lift Light:
Green light is energized whenever vacuum level is sufficient for lifting maximum load weight
(higher than 16" Hg [-54 kPa]).
Low Vacuum Warning Buzzer:
(if applicable)
Max Alarm Volume = 103 dBA at 2 ft [60 cm]. While the lifter is powered up, an audible alarm
warns the operator whenever vacuum is not sufficient for lifting the maximum load weight.
Options:
Available with Remote Control System. The system uses a 310-320 MHz signal.
Available with Short Lift Bar. This option is designed for applications involving minimal
clearance between the lifter and the hoisting equipment, such as installations under eaves or
similar low-clearance situations. Maximum Load Capacity = 1,800 lbs [815 kg].
See separate instructions about other options.
Operating Elevation:
Maximum = 6,000' [1,828 m]
Operating Temperatures:
32° to 104° F [0° to 40° C]
Service Life:
This lifter is designed to have a service life of 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
The illustrations under ASSEMBLY: TO CHANGE THE PAD FRAME CONFIGURATION show the Pad Spread and Maximum Load Capacity
for all approved MR1611LDC pad frame configurations.
2
Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.

Rev 34.7/3-20 4 MR1611LDC: #35050
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 Maximum 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
attaching the pads (see MAINTENANCE: VACUUM PAD MAINTENANCE).
Never exceed the Maximum Load Capacity or attempt to lift loads that 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
ATTACH 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 could compromise its safety. Wood’s Powr-
Grip cannot be responsible for the safety of a lifter that has been modified by others. For
consultation, contact Wood's Powr-Grip (see LIMITED WARRANTY).
If the lifter is equipped with a Remote Control System, never operate the lifter remotely unless
there is clear communication about intended actions (eg, releasing load) with all personnel
near the lift. In addition, the operator must visually verify the status of the lifter and load
prior to remote operations.

Rev 34.7/3-20 5 MR1611LDC: #35050
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 MR1611LDC shown.
1 LIFT BAR
13 VACUUM RESERVE TANK
2 LIFT BAR EXTENSION
14 ROTATION RELEASE LEVER
3 BATTERY CHARGER
15 QUICK CONNECTOR
4 BATTERY ENCLOSURE
16 ROTATING PAD ARM
5 POWER SWITCH
17 AIR FILTER
6 CENTER SECTION of PAD FRAME
18 VACUUM GAUGE
7 REMOVABLE SECTION of PAD FRAME
19 INSTRUCTION CANISTER
8 VACUUM PAD
20 Enclosure with VACUUM PUMP(S)
9 REMOVABLE PAD ARM
and VACUUM SWITCH
10 VACUUM LIFT LIGHT
21 BATTERY GAUGE
11 “ATTACH/RELEASE”SWITCH
22 BATTERY TEST BUTTON
12 MOVABLE CONTROL PENDANT
23 LIFT BAIL
16

Rev 34.7/3-20 6 MR1611LDC: #35050
ASSEMBLY
TO SET UP THE LIFTER
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).
Disengage the lifter’s rotation latch (see OPERATION: TO ROTATE THE LOAD EDGEWISE) and raise
the lift bar to a vertical orientation, until the rotation latch re-engages.
Note: When you are planning to use the removable sections of the pad frame, install the lift
bar extension before proceeding further (see TO CHANGE THE PAD FRAME CONFIGURATION to
follow).
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift bail from slipping off under any circumstances.
Note: Some hoisting equipment hooks could interfere with an upright load that extends
beyond the lifter's pad frame. If the load would contact the hook during lifter operation, the
operator must prevent this by attaching a sling (or other rigging that does not interfere with
the load) between the hook and the lift bail.
WARNING: Any sling used must be rated to carry maximum load weight plus
lifter weight.
Attach the hoisting equipment hook to the lift bail, 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) Assemble the pad frame in the configuration that will provide optimal support of the load
while lifting (see TO CHANGE THE PAD FRAME CONFIGURATIONS to follow).
4) Connect the electrical connectors uniting the battery to the battery charger and the vacuum
generating system. Now the lifter is operational.
5) Perform Operational and Load Tests for the lifter as directed in MAINTENANCE: TESTING
SCHEDULE.If the lifter is equipped with a Remote Control System, also perform the REMOTE
CONTROL SYSTEM TEST (see MAINTENANCE).

Rev 34.7/3-20 7 MR1611LDC: #35050
TO CHANGE THE PAD FRAME CONFIGURATION
Various pad frame configurations enable the lifter to match different load dimensions and
weights. The following illustrations show all approved pad frame configurations.
Use only approved pad frame configurations.
1) Choose the approved configuration that will maximize support across the load surface and
minimize load overhang (see INTENDED USE: LOAD CHARACTERISTICS).
2) Install or remove the pad frame’s removable sections and removable pad arms, and/or rotate
the rotating pad arms, as needed. Some configurations also require the lift bar extension (see
sections to follow.)
Securely position vacuum hoses to avoid damage during lifter operation.
Make sure quick connectors seal completely and all vacuum hoses function
correctly.

Rev 34.7/3-20 8 MR1611LDC: #35050
To Install (and Remove) the Lift Bar Extension
The lift bar extension must be used whenever the pad frame’s removable sections are attached.
Otherwise, the extended pad frame would strike the lift bail during rotation. The lift bar
extension can be removed whenever the removable sections are not attached to the pad frame.
1) Support the lifter so that hoisting equipment is not required to hold it upright. Make sure the
lifter is supported securely before removing the hoisting equipment hook from the lift bail.
2) Remove the 12 bolts from the lift bar joint and remove the joint couplers.
3) Install the lift bar extension between the upper and lower sections of the lift bar.
4) Install joint couplers at the joints on either end of the lift bar extension.
5) Install and securely tighten the 12 bolts for each of the 2 lift bar joints.
6) To remove the lift bar extension, reverse this procedure.
To Install (and Remove) the Optional Short Lift Bar
If applicable, install the Short Lift Bar directly to the lifter, as described in the preceding section.
However, do not use the lift bar extension or joint couplers; instead, bolt the Short Lift Bar
securely onto the lower section of the standard lift bar, using the hardware provided.
WARNING: Maximum Load Capacity equals 1,800 lbs [815 kg] when Short Lift
Bar is installed.
To remove the Short Lift Bar, reverse this procedure.
To Install (and Remove) the Removable Sections of the Pad Frame
1) Align one removable section with the center section of the pad frame.
2) Align the bolt holes on each side of the joint where the removable section attaches to the
center section. Insert the 8 bolts for 1 removable section through the bolt holes and tighten
the bolts securely. Make sure the bolt spacers located inside the pad frame’s tubes remain in
place.
3) Remove the male end of the quick connector from the spring
clip on the pad frame’s removable section. Thread the
vacuum hose through the opening for this purpose at the
pad frame joint. Push the male and female ends of the
quick connector together until they lock.
4) Repeat steps 1-3 to install the other removable section of
the pad frame.
5) To remove the pad frame’s removable sections, reverse this
procedure. Move the release ring on the female end of the
quick connector away from the male end to separate the ends.
QUICK CONNECTOR
1) FEMALE END
2) MALE END

Rev 34.7/3-20 9 MR1611LDC: #35050
To Install (and Remove) Removable Pad Arms
1) Insert the end of a removable pad arm in one socket on the pad frame, so that the holes
align for the cotterless hitch pin.
2) Secure the removable pad arm in the pad frame by pushing a cotterless hitch pin through the
holes until the retaining ball emerges on the far side of the pad frame socket.
3) Remove the end of the quick connector from the spring clip on the pad arm. Push the male
and female ends of the quick connector together until they lock.
4) Repeat steps 1-3 to install each pad arm required for the pad frame configuration desired.
5) To remove the removable pad arms, reverse this procedure. Move the release ring on the
female end of the quick connector away from the male end to separate the ends. Store
removed pad arms in a clean, dry location to protect them from environmental exposure.
To Rotate Rotating Pad Arms
1) Remove the 4 bolts that secure each rotating pad arm on the pad frame.
2) Rotate the arm 90° and reinstall the bolts.
3) Repeat steps 1-2 to rotate each pad arm as required for the pad frame configuration desired.

Rev 34.7/3-20 10 MR1611LDC: #35050
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 ATTACH THE PADS TO A LOAD).
• The load's contact surface must be suitable for obtaining a friction coefficient of 1 with the
lifter's vacuum pads (see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient), as
verified by a friction test, or capacity should be derated appropriately. If necessary, contact
Wood's Powr-Grip for help in conducting a friction test.
• 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 that 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.
• 1" [2.5 cm] is the maximum allowable thickness of loads at the maximum weight (see
SPECIFICATIONS: Maximum Load Capacity). However, allowable thickness increases as load
weight decreases. If necessary, contact Wood’s Powr-Grip for help in determining the
maximum thickness permitted when handling any specific load.
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 WPG for help in determining the Maximum Load Capacity for a particular curved load.

Rev 34.7/3-20 11 MR1611LDC: #35050
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 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:
Moisture on contact surfaces of the load or vacuum pads diminishes the lifter’s slip resistance,
thereby reducing the lifting capacity (see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction
Coefficient).
WARNING: Moisture reduces slip resistance of vacuum pads.
Although the lifter's exterior surfaces can tolerate some exposure to water vapor, they are not
designed to be watertight. Submerging the lifter or using it in rain may damage lifter
components; these and similar conditions must be avoided.
• If the lifter is equipped with a Remote Control System, the work environment must be suitable
for using it, as verified by the REMOTE CONTROL SYSTEM TEST (see MAINTENANCE).
• !!–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.
Note: This lifter is equipped with a battery, which may be subject to special disposal regulations.

Rev 34.7/3-20 12 MR1611LDC: #35050
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
WARNING: Always check battery energy before using lifter.
(See MAINTENANCE: BATTERY TEST)
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).
WARNING: Make sure alarm is clearly audible over ambient noise at operator
position.
If the lifter is equipped with a low vacuum warning buzzer, the volume of the alarm may be
adjusted by rotating the shutter of the warning buzzer. Make sure the alarm is loud enough to
be heard over any other noise that may be present while the lifter is in use. In addition, the
alarm must be clearly audible at the maximum distance the operator may be from the lifter, as
well as through any barriers or obstructions between the operator and the lifter.
4
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).
4
If applicable, consult EN7731 to make sure the buzzer complies with CE Standards.

Rev 34.7/3-20 13 MR1611LDC: #35050
1
2
5
4
3
Confirming the Pad Frame Configuration
WARNING: Load Capacity of lifter varies, depending on pad frame configuration.
Make sure the pad frame has been assembled in the configuration that will provide optimal
support of the load while lifting (see ASSEMBLY: TO CHANGE THE PAD FRAME CONFIGURATION). The
pad frame configuration selected must be appropriate both for the weight and for the dimensions
of the load to be lifted.
Preparing to Use the Optional Remote Control System
If the lifter is equipped with a Remote Control System, the operator can engage the lifter's
“attach” and “release”functions at distances up to 250' [76 m], provided there is a direct and
clear view of the lifter and its status indicators from the operator location (see MAINTENANCE:
REMOTE CONTROL SYSTEM TEST). When lifting a load from a remote location, the operator must
monitor the lifter at all times to make sure that it is functioning as intended.
5
Additionally, the
operator must exercise special care to make sure that the load is landed and supported correctly
before releasing the load (see TO RELEASE THE PADS FROM THE LOAD to follow).
The radio transmitter is also equipped with an emergency transmitter disconnect that prevents
the transmitter from sending any transmission. To reset, twist the button clockwise while
allowing it to spring outward to its normal position.
5
The Remote Control System is designed with safeguards to prevent multiple lifters from responding until a clear transmission is
received. Nevertheless, radio controlled lifters should be tested to make sure that each transmitter controls only one lifter. The
buttons located on the lifter function regardless of any radio transmissions in the vicinity.
1 EMERGENCY TRANSMITTER DISCONNECT
2 TRANSMISSION INDICATOR LIGHT
3 “RELEASE”BUTTON
4 TRANSMITTER POWER/ENABLE BUTTON
5 “ATTACH” BUTTON

Rev 34.7/3-20 14 MR1611LDC: #35050
TO ATTACH THE PADS TO A LOAD
Powering up the Lifter
Place the lifter's power switch in the “on” position ( ).
6
The blue power light remains
illuminated while the lifter is powered up. Keep the power switch in the “on” position while lifting
a load. Any power interruption during a lift could result in the release of a load and injury to the
operator or others (see TO LIFT AND MOVE THE LOAD: In Case of Power Failure to follow).
WARNING: Never turn power off while lifting.
If the lifter is equipped with a Remote Control System,
press the transmitter power ( Ф) as shown and hold it
briefly to activate the radio transmitter.
7
Note: If the transmitter is activated, the transmission indicator
light flashes green when any button on the transmitter is
pressed and held; if the transmitter is not activated, the
indicator light flashes red (see BEFORE USING THE LIFTER:
Preparing to Use the Optional Remote Control preceding).
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 prevent the pads from sealing against the load (see MAINTENANCE:
VACUUM PAD MAINTENANCE).
The lifter must be attached only to vertically oriented loads. Center the pad frame to within 2" [5
cm] of the load center, since off-center loading can cause the load to rotate unexpectedly (see
TO ROTATE THE LOAD EDGEWISE to follow) and possibly damage the lifter.
8
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 position the lifter so that all pads are in contact with the load.
6
When the operator powers up the lifter, either the stand-by function or the “attach” function is automatically activated,
depending on which was used last. If a vacuum pump or any other powered component fails to function while the lifter's power
switch is in the “on” position, examine each circuit breaker (adjacent to power switch) to determine whether it has interrupted the
electrical circuit to the component. Although the operator can reset the circuit breaker, the power interruption may indicate an
electrical problem that requires attention. Correct any deficiency before resuming normal operation of the lifter (see wiring
diagram provided).
7
The radio transmitter turns off automatically, after a period of inactivity. The operator can also operate the lifter without using
the radio transmitter, if desired.
8
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, if
the operator can maintain control of the load at all times and the load weight is low enough to avoid damaging the lifter.

Rev 34.7/3-20 15 MR1611LDC: #35050
Sealing the Pads against the Load
The “attach/release” switch is located on the movable control pendant. The pendant allows the
vacuum controls to be moved away from the lifter, so that the operator can control airflow at a
distance equal to the length of the pendant cord.
WARNING: Do not disconnect control pendant during lifter operation.
The control pendant is not intended to be disconnected during lifter operation. Disconnecting the
control pendant is likely to result in a load release and injury to the operator or others nearby.
Turn the “attach/release” switch to the “attach”( ) position (clockwise) to make sure the
“attach” function is activated.
WARNING: Keep “attach/release” switch in “attach” position throughout lift.
Alternatively, if the lifter is equipped with a Remote Control System, press the “attach” button
( ) on the radio transmitter.
This energizes the vacuum pumps, causing air to be drawn immediately at the vacuum pads.
The low vacuum warning buzzer also sounds an alarm until the lifter attains sufficient vacuum to
lift the maximum load weight (see TO LIFT AND MOVE THE LOAD: Load Capacity and Lift Light to
follow). Press the lifter onto the load until all the pads seal against it. The lifter must remain in
the “attach” mode throughout the entire lift.
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 attach the pad to a load, this condition
should correct itself with continued use.

Rev 34.7/3-20 16 MR1611LDC: #35050
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.
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, make sure the vacuum switch is
adjusted correctly (see MAINTENANCE: VACUUM SWITCH ADJUSTMENT). If the vacuum switch
cannot be adjusted to maintain a vacuum of 16" Hg [-54 kPa], 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.
9
In the case of contamination, thoroughly clean
the contact surfaces of the load and the vacuum pads (see MAINTENANCE: VACUUM PAD
MAINTENANCE: Cleaning), and reattach 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) Attach the vacuum pads to the load as previously directed.
3) After the vacuum pumps stop running, place the power switch in the “off” ( ) position.
4) Raise the load a minimal distance, to confirm 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 use with this lifter.
10
9
Contaminated loads can also cause the vacuum pumps to run frequently or continuously. Since excessive pumping quickly
reduces battery energy, the operator should clean the load when possible, to minimize pumping.
10
Certain load materials are too rough or porous to allow the vacuum pads to form a seal that 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 34.7/3-20 17 MR1611LDC: #35050
TO LIFT AND MOVE THE LOAD
WARNING: Never attempt to lift load when lifter is in horizontal
orientation.
Load Capacity and the Lift Light
A lifter’s Load Capacity is rated at a vacuum level of 16" Hg [-54 kPa] (see SPECIFICATIONS).
After the lifter has attained this level, the vacuum pumps turn off automatically, to conserve
battery energy. At the same time, the green vacuum lift light turns on, to indicate that the lifter
is ready to lift the maximum load weight.
WARNING: Never attempt to lift load unless green lift light is illuminated.
Do not attempt to lift the load unless the lift light is illuminated; such an attempt could result in a
load release and injury to the operator.
Monitoring Vacuum Indicators
The vacuum lift light and the vacuum gauge must remain completely visible to the operator, so
that they can be monitored throughout the entire lift.
WARNING: Vacuum indicators must be visible to operator throughout entire lift.
If the vacuum system experiences leakage while the lifter is attached to the load, the vacuum
pumps turn on automatically, as required to maintain sufficient vacuum for lifting the maximum
load weight. The lift light turns off while the pumps are running, to signal the reduction in
vacuum to the operator.
If the pumps turn on and the lift light turns off while you are lifting a load, make sure the
vacuum gauge shows a vacuum level of 16" Hg [-54 kPa] or higher. 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 when vacuum level is insufficient.
Discontinue lifter use until the cause of the vacuum loss can be determined. If the pumps run at
intervals of 10 minutes or less while 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
inspections and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.

Rev 34.7/3-20 18 MR1611LDC: #35050
Monitoring the Low Vacuum Warning Buzzer (if applicable)
If the lifter is equipped with a low vacuum warning buzzer, an alarm sounds until the lifter attains
sufficient vacuum to lift the maximum load weight (see SPECIFICATIONS: Load Capacity). After
the lifter has attained this vacuum level, the alarm stops sounding, to indicate that the lifter is
ready to lift the load.
WARNING: Never attempt to lift load while alarm is sounding.
Do not attempt to lift the load while the alarm is sounding; such an attempt could result in a load
release and injury to the operator.
If the vacuum system experiences leakage while the lifter is attached to the load, the vacuum
pumps turn on automatically, as required to maintain sufficient vacuum. The alarm also sounds
while the pumps are running, to signal the reduction in vacuum to the operator. If the alarm
sounds while you are lifting a load, make sure the vacuum gauge shows a vacuum level of 16"
Hg [-54 kPa] or higher. If not, immediately 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 alarm is sounding.
Discontinue lifter use until the cause of the vacuum loss can be determined. Using the lifter on
contaminated, rough or porous surfaces may result in a vacuum loss, due to leakage between
the vacuum pads and the load. Since the alarm may sound in such circumstances, consult the
section TO ATTACH THE PADS TO A LOAD: Vacuum Level on Other Surfaces to determine whether the
lifter can be used to lift the load. If the vacuum loss is due to any other cause, 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 vacuum indicators show 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 any appropriate means to keep
the lifter and load in the desired orientation while they are suspended from the crane. Once
sufficient clearance is established, the load can be rotated as desired (see TO ROTATE THE LOAD
EDGEWISE to follow).
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 (ie, in battery).
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 everyone 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.