Wood’s Powr-Grip MRTALPCH611LDC User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBERS: MRTALPCH611LDC,
MRTALPCH6HV11DC, MRTALPCH610DCO
SERIAL NUMBER: ___________
(please see serial label and record number here)
MANUAL ROTATOR / TILTER
LOW-PROFILE, DC-VOLTAGE
WITH DUAL VACUUM SYSTEM
AND CHANNEL-STYLE PAD FRAME
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 8.0/6-13 1 MRTALPCH6-DC: #35054
TABLE OF CONTENTS
SPECIFICATIONS............................................................................................................ 3
WARNINGS ..................................................................................................................... 4
OPERATING FEATURES................................................................................................... 5
ASSEMBLY....................................................................................................................... 7
TO SET UP THE LIFTER ................................................................................................................ 7
TO CHANGE THE PAD FRAME CONFIGURATION ................................................................................8
To Connect/Disconnect Vacuum Hoses..........................................................................................................8
To Install/Remove Pad Frame Extensions ......................................................................................................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 APPLY THE PADS TO A LOAD..................................................................................................14
Positioning the Lifter on the Load ...............................................................................................................14
Powering up the Lifter................................................................................................................................14
Sealing the Pads against the Load...............................................................................................................14
Reading the Vacuum Gauges ......................................................................................................................15
Vacuum Level on Optimal Surfaces .............................................................................................................15
Vacuum Level on Other Surfaces ................................
.............

Rev 8.0/6-13 2 MRTALPCH6-DC: #35054
MAINTENANCE ............................................................................................................. 21
INSPECTION SCHEDULE.............................................................................................................21
Every-Lift Inspection ..................................................................................................................................21
Frequent Inspection ...................................................................................................................................21
Periodic Inspection.....................................................................................................................................21
Infrequent Use...........................................................................................................................................22
TESTING SCHEDULE..................................................................................................................22
Operational Tests.......................................................................................................................................22
Load Test ..................................................................................................................................................22
MAINTENANCE SCHEDULE..........................................................................................................23
BATTERY TEST .........................................................................................................................23
BATTERY RECHARGE .................................................................................................................23
BATTERY CHARGER TEST ...........................................................................................................24
VACUUM PAD MAINTENANCE......................................................................................................24
Friction Coefficient .....................................................................................................................................24
Inspection .................................................................................................................................................25
Cleaning ....................................................................................................................................................25
VACUUM TEST .........................................................................................................................26
REMOTE CONTROL SYSTEM TEST ................................................................................................26
AIR FILTER MAINTENANCE ........................................................................................................27
Filter Function and Conditions Requiring Service ..........................................................................................27
Filter Service Procedures ............................................................................................................................27
VACUUM PUMP MAINTENANCE −DYNAFLO DV1032102 ...............................................................28
Replacing the Diaphragm ...........................................................................................................................28
Replacing the Gasket/Flap Valves................................................................................................................28
Replacing the Head Assembly .....................................................................................................................28
VACUUM PUMP MAINTENANCE −THOMAS 107CDC20 ..................................................................29
Replacing the Diaphragm ...........................................................................................................................29
Replacing the Intake Valve Flapper .............................................................................................................29
Replacing the Exhaust Valve Flapper and Head Gasket .................................................................................29
VACUUM SWITCH ADJUSTMENT ..................................................................................................30
Vacuum Switch Function ............................................................................................................................30
Conditions Requiring Readjustment .............................................................................................................30
Adjustment Procedure ................................................................................................................................31
REPLACEMENT PARTS LIST .......................................................................................... 32
LIMITED WARRANTY.................................................................................................... 33

Rev 8.0/6-13 3 MRTALPCH6-DC: #35054
SPECIFICATIONS
Description:
Designed for use with a crane or other hoisting equipment, MRTALPCH6-DC lifters employ vacuum to hold
a load for lifting, and they provide manual 180° rotation and manual 90° tilt movements for load
manipulation.
Model Number:
MRTALPCH611LDC
MRTALPCH6HV11DCO
MRTALPCH610DCO
Vacuum Pads:1
(Six of standard rubber, spring-mounted with 1/8" [3 mm] travel and #60 filter screen)
11" [28 cm] nom. diameter,
lipped (Model G3370)
10" [25 cm] nom. diameter,
lipped (Model HV11)
10" [25 cm] nom. diameter,
concave (Model G0750)
Pad Spread:
(to outer edges)
Minimum:
53¾" x 12" [1365 x 305 mm]
52¾" x 11" [1340 x 279 mm]
51¾" x 10" [1314 x 254 mm]
Maximum:
79¼" x 12" [2010 x 305 mm]
78¼" x 11" [1988 x 279 mm]
77¼" x 10" [1962 x 254 mm]
Load Capacity:
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces2)
Per-Pad:
184 lbs [83.5 kg]
150 lbs [68 kg]
150 lbs [68 kg]
Maximum w/4 pads:
700 lbs [320 kg]
600 lbs [270 kg]
600 lbs [270 kg]
Maximum w/6 pads:
1100 lbs [500 kg]
900 lbs [410 kg]
900 lbs [410 kg]
Lifter Weight:
125 lbs [57 kg]
131 lbs [60 kg]
118 lbs [54 kg]
Power Source:
12 volts DC, 10 amps (with Thomas pump) or 3 amps (with Dynaflo pump)
Battery Capacity:
7 amp-hours
Tilt Capability:
Manual, 90°, with mechanical advantage that minimizes operator effort and automatic latching in upright
position
Rotation Capability:
Manual, 180°, with automatic latching at each ¼ revolution (when desired)
Vacuum Pump:
Diaphragm type, 1 SCFM [28 liters/minute] nominal airflow
Dual Vacuum System:
2 vacuum system circuits allow the lifter to maintain the vacuum level in one circuit even if an unexpected
vacuum loss occurs in the other one (eg, due to load breakage).
Vacuum Reserve Tanks:
2 vacuum reservoirs help prevent immediate vacuum loss in case of power failure and extend battery life
by reducing pump cycles required to maintain vacuum.
Vacuum Gauges:
2 dial gauges indicate current vacuum level in positive inches of Hg and negative kPa.
Vacuum Lift Light:
Green light is energized whenever vacuum is higher than the level required to lift the maximum load weight
(16" [-54 kPa]).
Low Vacuum Warning Buzzer: Maximum 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 Model EO8RC1 - Remote Control System. This option features a radio transmitter and
receiver that can activate apply and release functions at distances up to 250 ft [76 m]. The system uses
either a 310-320 or a 433-434 MHz signal, depending on requirements in your geographical location.
See separate instructions about other options.
Operating Elevation:
Maximum = 6000 ft [1828 m]
Operating Temperatures:
32° to 104° F [0° to 40° 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.powrgrip.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.
1Available with optional closed-cell foam rings for rough or textured surfaces (Model MRTALPCH6HV11FDCO), as well
alternative rubber compounds for special applications (see REPLACEMENTS PARTS LIST).
2Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.

Rev 8.0/6-13 4 MRTALPCH6-DC: #35054
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).
Never disengage both the rotation latch and the tilt latch at the same time.
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 8.0/6-13 5 MRTALPCH6-DC: #35054
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 MRTALPCH611LDC shown with Remote Control System option.
1 LIFT SPOOL
10 BATTERY GAUGE
19 VACUUM GAUGE
2 BATTERY CHARGER
11 ENABLE BUTTON
20 ROTATION RELEASE LEVER
3 VACUUM RESERVE TANK
12 APPLY BUTTON
21 Cover for AIR FILTERS
4 Cover for BATTERY
13 RADIO RECEIVER (optional)
22 QUICK CONNECTOR
5 CONTROL HANDLES
14 STROBE LIGHT (optional)
23 LIFT BAR
6 TILT RELEASE LEVER
15 VACUUM RELEASE BUTTON
24 PAD FRAME EXTENSION
7 Cover for VACUUM PUMP
16 POWER SWITCH
25 VACUUM PAD
8 VACUUM LIFT LIGHT
17 Enclosure with VACUUM SWITCH
26 PAD FRAME
9 LOW VACUUM WARNING BUZZER
18 BATTERY TEST BUTTON

Rev 8.0/6-13 6 MRTALPCH6-DC: #35054
1 TRANSMISSION INDICATOR LIGHT
2 TRANSMITTER POWER/ENABLE BUTTON
3 RELEASE BUTTONS
4 APPLY BUTTONS
5 EMERGENCY TRANSMITTER DISCONNECT
OPTIONAL RADIO TRANSMITTER

Rev 8.0/6-13 7 MRTALPCH6-DC: #35054
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) If necessary, assemble the lifter's lift bar as follows: One
segment of the lift bar can be removed, to reduce overall lifter
dimensions for shipping. If so, orient the removable segment
(1) as shown in the illustration, and slide it over the other
segment until the bolt holes align. Reinstall the bolts and all
associated hardware (2); then tighten both bolts securely.
3) Position the lifter's lift spool as follows: The adjustable lift spool
assembly provides 3 different lift points (see illustration), in
order to optimize the lifter's hang angle and/or its overall height
for the intended use.3To change the lift spool position, remove
the retaining bolt (3) and, if necessary, loosen the pivot bolt (4).
Next pivot the lift spool assembly until the bolt holes align for the
desired spool position. Then reinstall the retaining bolt and all
associated hardware. Tighten both bolts securely.
4) 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 tilt latch (see OPERATION: TO TILT THE LOAD) and raise the lift bar to a vertical
orientation. Then attach the hoisting equipment hook to the lift spool.
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift spool 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 spool.
WARNING: Any sling used must be rated to carry maximum load weight plus
lifter weight.
3When the pad frame is used in the vertical orientation (see illustration in OPERATING FEATURES), placing the lift spool in the
lowest position creates interference with the pad frame extension. To avoid this problem, place the lift spool in one of the other
two positions or remove the pad frame extensions (see TO CHANGE THE PAD FRAME CONFIGURATION to follow).

Rev 8.0/6-13 8 MRTALPCH6-DC: #35054
Use the hoisting equipment to raise the lifter out of the shipping container. Be careful to
avoid damaging any vacuum pads.
5) Arrange the pad frame in the configuration that will provide optimal support of the load while
lifting (see TO CHANGE THE PAD FRAME CONFIGURATION to follow). Remove the pad covers and
save them for use whenever the lifter is stored.
6) Connect the electrical connectors uniting the battery to the battery charger and the vacuum
generating system. Now the lifter is operational.
7) 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).
TO CHANGE THE PAD FRAME CONFIGURATION
The lifter offers two pad frame configurations to accommodate different load dimensions and
weights (see SPECIFICATIONS: Pad Spread and Load Capacity). Select the configuration that
provides optimal support across the load surface and minimizes load overhang (see OPERATION:
BEFORE USING THE LIFTER). To support longer, heavier loads (see Maximum Pad Spread and
Maximum Load Capacity in SPECIFICATIONS), both pad frame extensions must be installed on
the pad frame and the vacuum hoses must be connected to the vacuum pads located on the
extensions.
WARNING: Removing any extension or disconnecting the corresponding
vacuum pad reduces load capacity of lifter.
To support smaller dimensions and weights, the pad frame extensions may be removed, and the
corresponding vacuum hoses may be disconnected, provided that the lifter still has
sufficient capacity to support the load in question (see INTENDED USE: LOAD
CHARACTERISTICS). The Maximum Load Capacity is reduced when the pad frame extensions are
removed. Always assemble the pad frame with both extensions installed or both removed, to
keep the lifter balanced.
To Connect/Disconnect Vacuum Hoses
The vacuum hose for the vacuum pad on each pad frame
extension is connected to or disconnected from the vacuum
system by means of a quick connector. To connect the
vacuum hose, push the male and female ends of the connector
together until they lock. To disconnect the vacuum hose, move
the release ring on the female end away from the male end until
the connector separates.
WARNING: Make sure vacuum hoses are coiled or
routed to avoid damage during rotation or tilt.
Make sure all vacuum hoses are secure and routed to avoid being punctured, pinched, kinked,
entangled, abraded or otherwise damaged while the lifter is in operation.
Note: Whenever a quick connector is disconnected, the corresponding vacuum pad does not
contribute to the load capacity, whether or not the extension is mounted on the pad frame.
QUICK CONNECTOR
1 FEMALE END
2 MALE END

Rev 8.0/6-13 9 MRTALPCH6-DC: #35054
To Install/Remove Pad Frame Extensions
1) Set the lifter with the vacuum pads facing downward on a clean, smooth, flat surface.
2) Insert the tabs extending from one pad frame extension between the rails of the pad frame.
If the tabs do not fit between the rails, you may loosen the bolts that connect the tabs to the
extension. Make sure that the vacuum pads on the extension and on the pad frame are
contacting the same surface, to ensure that all the pads are aligned in the same plane.
Note: The pad frame extension that is equipped with a control handle should be installed on
the lower end of the pad frame (ie, when oriented vertically).
3) Align the bolt holes in the pad frame extension with the bolt holes in the pad frame.
4) Secure the pad frame extension in the pad frame by installing the bolts supplied and
tightening all bolts securely.
5) Connect the vacuum hose to the vacuum pad on the pad frame extension as directed in the
preceding section, To Connect/Disconnect Vacuum Hoses.
6) Repeat steps 1-5 to install the other pad frame extension.
7) To remove pad frame extensions, reverse this procedure. Store removed extensions in a
clean, dry location, to protect them from environmental exposure. Use the pad covers
supplied to keep the vacuum pads clean.

Rev 8.0/6-13 10 MRTALPCH6-DC: #35054
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.4To 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).
• 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. 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 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.
• In order to maintain load stability in the upright position, the maximum allowable thickness of
loads is 1½" [3.8 cm] at the maximum weight (see SPECIFICATIONS: Load Capacity).5This
allowance assumes that the load is centered correctly on the lifter's pad frame (see
OPERATION: TO APPLY THE PADS TO A LOAD: Positioning the Lifter on the Load) and that no
other forces, such as wind pressure, are at work on the load. Either of these circumstances
could reduce the allowable load thickness.
4Lifters 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.
5This allowance does not account for the use of Pad Spacers (option CM3PE2).
WARNING: Pad Spacers can reduce load
stability in the upright position and, in some cases, the allowable thickness of loads.

Rev 8.0/6-13 11 MRTALPCH6-DC: #35054
Conversely, allowable thickness increases as load weight decreases. In addition, an operator
may be able to manually counteract the tendency of unstable loads to tilt out of the upright
position, provided that the operator maintains control of the load at all times (see
OPERATION: TO LIFT AND MOVE THE LOAD: About the Tilt Linkage and TO TILT THE LOAD). 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.
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:
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 water-tight. 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).
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 8.0/6-13 12 MRTALPCH6-DC: #35054
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.
The volume of the alarm may be adjusted by rotating the shutter of the low vacuum 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. In order to be considered clearly audible, the alarm
volume must exceed ambient noise by at least 15 dBA at the operator position.
6
Since the Maximum Alarm Volume is 103 dBA, ambient noise must not exceed 88 dBA under any
circumstances. Furthermore, if ambient noise measures 88 dBA, the alarm volume must be set
to maximum and the operator must remain within 2 ft [60 cm] of the warning buzzer, in order for
it to be effective.
6Consult CE Standard EN 457 for alternative ways to determine whether the alarm is clearly audible to operators.

Rev 8.0/6-13 13 MRTALPCH6-DC: #35054
CAUTION: Examine each air filter regularly, and empty when necessary.
Two air filters help protect the vacuum generating system from contaminants. However, the
lifter is not intended for use on wet load surfaces because the filters would not prevent liquid
from entering the vacuum system. The operator must examine each filter regularly and remove
any liquid or other contaminants found inside (see MAINTENANCE: AIR FILTER MAINTENANCE). To
access the air filters, remove the cover indicated in OPERATING FEATURES.
Confirming the Pad Frame Configuration
WARNING: Load capacity of lifter can vary, 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 in question.
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 apply
and release functions at distances up to 250 ft [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.7In addition, the operator
must exercise special care to ensure 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. This button should not need to be used, but
may have to be reset if accidentally engaged. To reset, twist the button clockwise while
allowing it to spring outward to its normal position.
7The 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 ensure that each transmitter controls only one lifter. The
buttons located on the lifter function regardless of any radio transmissions in the vicinity.

Rev 8.0/6-13 14 MRTALPCH6-DC: #35054
TO APPLY THE PADS TO A LOAD
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).
Center the lifter’s pad frame to within 2" [5 cm] of the load center, since off-center loading can
cause the load to rotate or tilt unexpectedly (see TO ROTATE THE LOAD EDGEWISE or TO TILT THE LOAD
to follow), and it may also damage the lifter.8Make 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 apply the lifter to the
load so that all pads are touching the contact surface.
Powering up the Lifter
Place the lifter's power switch in the ON ( ) position.9The 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 possible
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/enable button
and hold it briefly to activate the radio transmitter.10 This button is also used to activate the
enable function (see TO RELEASE THE PADS FROM THE LOAD to follow).
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
System preceding).
Sealing the Pads against the Load
Firm pressure at the center of the lifter helps the vacuum pads begin to seal against the load.
Press an apply button on the lifter or the optional radio transmitter to make sure the apply
function is activated. This energizes the vacuum pump, causing air to be drawn at the pads
immediately. 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: Interpreting
the Warning Buzzer and Lift Light to follow). The lifter must remain in the apply mode
throughout the entire lift.
8The 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.
9When the operator powers up the lifter, either the stand-by function or the apply function is automatically activated,
depending on which was used last.
10 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.

Rev 8.0/6-13 15 MRTALPCH6-DC: #35054
WARNING: Keep apply function activated throughout 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 apply the pad to a load, this condition
should correct itself with continued use.
Reading the Vacuum Gauges
The lifter is equipped with 2 vacuum gauges, which indicate the current vacuum level in each
circuit of 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. Both gauge needles 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] on either vacuum gauge, 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 both vacuum gauges, 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 both vacuum gauges, due to leakage in the seal
between the vacuum pads and the load surface.11 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) After the vacuum pump stops running, place the lifter's power switch in the OFF ( )
position.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Monitor both vacuum gauges 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.12
11 Contaminated loads can also cause the vacuum pump to run frequently or continuously. Since excessive pumping quickly
reduces battery energy, the operator should clean the load when possible, to minimize pumping.
12 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 8.0/6-13 16 MRTALPCH6-DC: #35054
TO LIFT AND MOVE THE LOAD
Positioning the Lift Bar
WARNING: Lift bar must be oriented vertically to lift
load.
Never lift the load from a flat position with the lift bar latched parallel
to the load. Always disengage the tilt latch (see TO TILT THE LOAD to
follow) and raise the lift bar to a vertical orientation before attempting to lift.
Interpreting the Warning Buzzer and 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 pump and the low vacuum warning buzzer turn
off automatically, to conserve battery energy. At the same time, the green vacuum lift light
turns on , to signal 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 possible injury to the operator.
Monitoring Vacuum Indicators
The vacuum lift light and both vacuum gauges 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
pump turns on automatically, as required to maintain sufficient vacuum for lifting the maximum
load weight. In addition, the lift light turns off while the pump is running, to signal the
reduction in vacuum to the operator.
If the pump turns on and lift light turns off while you are lifting a load, make sure both vacuum
gauges show 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 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 pump runs
at intervals of ten 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
inspection and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.

Rev 8.0/6-13 17 MRTALPCH6-DC: #35054
Monitoring the Low Vacuum Warning Buzzer
Using the low vacuum warning buzzer requires minimal interaction from the operator. The
warning buzzer sounds an alarm 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 possible injury to the operator.
If the vacuum system experiences leakage while the lifter is attached to the load, the vacuum
pump turns on automatically, as required to maintain sufficient vacuum. The alarm also sounds
while the pump is 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 APPLY 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 the 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 the control handles 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 or tilted as desired (see TO ROTATE THE
LOAD EDGEWISE or TO TILT THE LOAD to follow).
In Case of Power Failure
The lifter is equipped with 2 vacuum reserve tanks, 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 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 8.0/6-13 18 MRTALPCH6-DC: #35054
TO ROTATE THE LOAD EDGEWISE
WARNING: Never disengage both the rotation latch and the tilt latch at the
same time.
This lifter is not designed for rotation and tilt functions to be used at the same time.
Disengaging the rotation and tilt latches simultaneously could cause uncontrolled and
unpredictable load movement, potentially resulting in load damage or injury to the operator.
CAUTION: Rotation function only works when pad frame is latched in vertical
orientation.
Make sure the pad frame is latched in the vertical position of the tilt range (see TO TILT THE LOAD
to follow), as shown in the OPERATING FEATURES illustration, because the rotation function is
not designed to work in any other position.
WARNING: Make sure load is positioned correctly on lifter (see TO APPLY);
unbalanced loads may rotate unexpectedly when latch is
disengaged.
Remember that the load is longer in its diagonal dimensions than in its
side dimensions. Make sure there is sufficient clearance for the load to
rotate without contacting the operator or any nearby objects. Maintain
a firm grip on one control handle (located on pad frame) to keep the load
under control at all times. Pull the rotation release lever to disengage
the rotation latch, and rotate the load to the desired position. To stop
the load’s motion automatically at each quarter turn, simply let go of the
rotation release lever immediately after initiating the rotation, so that the
rotation latch engages at the next stop. Whenever rotation is not
required, keep the rotation latch engaged, to prevent accidental damage to the load and possible
injury to the operator.