WPG MRTARC8HV11DC User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBERS: MRTARC8HV11DC,
MRTARC811LDC
SERIAL NUMBER: ___________
(please see serial label and record number here)
QUADRA-TILT ROTATOR
DC-VOLTAGE, HIGH-FLOW, WITH PENDANT
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 5.2/9-16 1 MRTARC8-DC: #35076RC
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..........................................................................................................9
To Reposition (or Remove) Movable Pad Mounts .........................................................................................10
To Install/Remove Extension Arms..............................................................................................................10
About Secondary Rotation Stops.................................................................................................................10
INTENDED USE .............................................................................................................11
LOAD CHARACTERISTICS...........................................................................................................11
OPERATING ENVIRONMENT .......................................................................................................12
DISPOSAL OF THE LIFTER ..........................................................................................................13
OPERATION ..................................................................................................................14
BEFORE USING THE LIFTER........................................................................................................14
Taking Safety Precautions ..........................................................................................................................14
Performing Inspections and Tests...............................................................................................................14
Confirming the Pad Frame Configuration.....................................................................................................15
Preparing to Use the Optional Remote Control System.................................................................................15
TO APPLY THE PADS TO A LOAD..................................................................................................16
Powering up the Lifter................................................................................................................................16
Positioning the Lifter on the Load ...............................................................................................................16
Sealing the Pads against the Load...............................................................................................................17
Reading the Vacuum Gauge .......................................................................................................................17
Vacuum Level on Optimal Surfaces .............................................................................................................18
Vacuum Level on Other Surfaces ................................................................................................................18
TO LIFT AND MOVE THE LOAD ....................................................................................................19
About the Tilt Linkage................................................................................................................................19
About the Optional Tilt Lock .......................................................................................................................19
Load Capacity and the Lift Light..................................................................................................................20
Monitoring Vacuum Indicators ....................................................................................................................20
Low Vacuum Warning Buzzer ...............................................................................................................20
Controlling the Lifter and Load....................................................................................................................21
In Case of Power Failure ............................................................................................................................21
TO ROTATE THE LOAD EDGEWISE................................................................................................21
TO TILT THE LOAD ...................................................................................................................22
TO RELEASE THE PADS FROM THE LOAD .......................................................................................23
AFTER USING THE LIFTER..........................................................................................................24
Storing the Lifter........................................................................................................................................24

Rev 5.2/9-16 2 MRTARC8-DC: #35076RC
MAINTENANCE ............................................................................................................. 25
INSPECTION SCHEDULE.............................................................................................................25
Every-Lift Inspection ..................................................................................................................................25
Frequent Inspection...................................................................................................................................25
Periodic Inspection.....................................................................................................................................25
Infrequent Use...........................................................................................................................................26
TESTING SCHEDULE..................................................................................................................26
Operational Tests.......................................................................................................................................26
Load Test..................................................................................................................................................26
MAINTENANCE SCHEDULE..........................................................................................................27
BATTERY TEST.........................................................................................................................27
BATTERY RECHARGE.................................................................................................................28
VACUUM PAD MAINTENANCE......................................................................................................29
Friction Coefficient .....................................................................................................................................29
Inspection .................................................................................................................................................29
Cleaning....................................................................................................................................................29
VACUUM TEST .........................................................................................................................30
REMOTE CONTROL SYSTEM TEST.......................................................................................................................31
AIR FILTER MAINTENANCE −LARGE ...........................................................................................32
Filter Function and Conditions Requiring Service ..........................................................................................32
Filter Service Procedures ............................................................................................................................32
VACUUM PUMP MAINTENANCE ―THOMAS 2907CDC22/12..........................................................33
Replacing a Diaphragm (1).........................................................................................................................33
Replacing an Intake Valve Flapper (6).........................................................................................................33
Replacing a Set of Exhaust Valve Flappers (9 & 10) and a Head Gasket (12) .................................................33
VACUUM PUMP MAINTENANCE −DYNAFLO DV1032102...............................................................34
Replacing the Diaphragm ...........................................................................................................................34
Replacing the Gasket/Flap Valves................................................................................................................34
Replacing the Head Assembly.....................................................................................................................34
VACUUM SWITCH ADJUSTMENT ..................................................................................................35
Vacuum Switch Function ............................................................................................................................35
Conditions Requiring Readjustment.............................................................................................................35
Adjustment Procedure................................................................................................................................36
REPLACEMENT PARTS LIST.......................................................................................... 37
LIMITED WARRANTY.................................................................................................... 39

Rev 5.2/9-16 3 MRTARC8-DC: #35076RC
SPECIFICATIONS
Description:
Designed for use with a crane or other hoisting equipment,
MRTARC8-DC lifters employ vacuum to
hold a load for lifting, and they provide manual 360° rotation and mechanically assisted, manual 90°
tilt movements for load manipulation.
Model Number:
MRTARC8HV11DC
MRTARC811LDC
Vacuum Pads:
10" [25 cm] nom. diameter,
lipped (Model HV11)
11" [28 cm] nom. diameter,
lipped (Model G3370)
(Eight, standard rubber, spring-mounted for ¼" [7 mm] travel, with #60 filter screen)
Pad Spread:
1
(to outer edges)
Length - Maximum:
122 1/4" [3105 mm]
123 1/4" [3130 mm]
- Minimum:
50" [1270 mm]
51" [1295 mm]
Width - Maximum:
73 1/2" [1867 mm]
74 1/2" [1892 mm]
- Minimum:
12 3/4" [327 mm]
13 3/4" [352 mm]
Lifter Weight:
294 lbs [134 kg]
290 lbs [132 kg]
Load Capacity
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces
2
)
Per-Pad:
150 lbs [68.5 kg]
175 lbs [79.5 kg]
Maximum:
1200 lbs [545 kg]
1400 lbs [635 kg]
Power Source:
12 volts DC, 26 amps
Battery Capacity:
28 amp-hours
Tilt Capability:
Manual, 90°, with four
-bar tilt linkage that minimizes operator effort and automatically holds a
correctly attached load in the upright or flat position.
Rotation Capability:
Manual, 360°, with automatic latching (when desired)
Vacuum Pump:
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:
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 LB8TLO -
Tilt Lock. When engaged, this option ensures that the upright or flat
orientation of the load is not compromised by accidental or unexpected forces.
Available
with Model EO8RC - Remote Control System. This option features a radio transmitter and
receiver that can activate apply and release functions at distances up to 250' [76 m]. The system
uses a 310-320 MHz signal.
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.
See appendix for instructions
about other options. 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.
1To identify the Pad Spread for any specific pad frame configuration, see the illustrations in ASSEMBLY: TO CHANGE THE PAD FRAME
CONFIGURATION.
2Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.

Rev 5.2/9-16 4 MRTARC8-DC: #35076RC
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).
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 5.2/9-16 5 MRTARC8-DC: #35076RC
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 MRTARC811LDC shown with 3-SCFM [85 liters/minute] vacuum generating system
and movable control pendant.
1 LIFT SPOOL
9 VACUUM GAUGE
18 VACUUM LIFT LIGHT
2 LIFT BAR
10 AIR FILTER
19 MOVABLE CONTROL PENDANT
3 BATTERY CHARGER
11 CONTROL HANDLE
20 CONTROL HANDLE
4 BATTERY GAUGE
12 ROTATION RELEASE LEVER
21 Enclosure with VACUUM PUMP(S),
5 BATTERY TEST BUTTON
13 MOVABLE PAD MOUNTS
VACUUM SWITCH and
6 POWER SWITCH
14 VACUUM PAD
LOW VACUUM WARNING BUZZER
7 EXTENSION ARM
15 QUICK CONNECTORS
22 BATTERY ENCLOSURE
8 TILT LOCK (OPTION)
16 PAD FRAME
23 VACUUM RESERVE TANK
17 APPLY/RELEASE SWITCH

Rev 5.2/9-16 6 MRTARC8-DC: #35076RC
1 RADIO RECEIVER
2 RADIO TRANSMITTER
3 STROBE LIGHT
4 VACUUM LIFT LIGHT
5 LOW VACUUM WARNING BUZZER
6ENABLE BUTTON
7APPLY BUTTON
8RELEASE BUTTON
1 TRANSMISSION INDICATOR LIGHT
2 TRANSMITTER POWER/ENABLE BUTTON
3 RELEASE BUTTONS
4 APPLY BUTTONS
5 EMERGENCY TRANSMITTER DISCONNECT
OPTIONAL RADIO TRANSMITTER
OPTIONAL REMOTE CONTROL SYSTEM

Rev 5.2/9-16 7 MRTARC8-DC: #35076RC
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).
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift spool from slipping off under any circumstances.
If the lifter is equipped with the optional tilt lock, make sure it is either disengaged or locked
out (see OPERATION: TO LIFT AND MOVE THE LOAD: About the Optional Tilt Lock). Then raise
the lift bar to a vertical orientation and attach the hoisting equipment hook to the lift spool.
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.
Use the hoisting equipment to raise the lifter out of the shipping container, being careful to
avoid damaging any vacuum pads. The control pendant for the hoisting equipment can be
attached to the lifter by inserting it into the hoist pendant basket provided. Remove the pad
covers and save them for use whenever the lifter is stored.
3) 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).
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 5.2/9-16 8 MRTARC8-DC: #35076RC
TO CHANGE THE PAD FRAME CONFIGURATION
The lifter offers a variety of pad frame configurations to accommodate different load dimensions
and weights (see SPECIFICATIONS: Pad Spread and Load Capacity). The following illustrations
show several possible configurations. Select a configuration to provide optimal support across
the load surface and to minimize load overhang (see OPERATION: BEFORE USING THE LIFTER).
Note: Smaller dimensions indicate Pad Spread when extension arms are removed (see To
Install/Remove Extension Arms to follow). Shaded circles indicate alternative locations of
vacuum pads (see To Reposition Movable Pad Mounts to follow).

Rev 5.2/9-16 9 MRTARC8-DC: #35076RC
Configurations are created by installing or removing the pad frame’s extension arms, by
repositioning or removing the movable pad mounts, and by connecting or disconnecting the
vacuum hoses to certain vacuum pads. Always assemble the pad frame in a symmetrical
arrangement, to keep the lifter balanced (see illustrations).
To support the maximum load weight, all vacuum pads must be installed on the pad frame and
all vacuum hoses must be connected to the vacuum pads. To support the largest load
dimensions, all extension arms must also be installed on the pad frame. To support smaller
weights and dimensions, some extension arms or vacuum pads 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
.
WARNING: Removing or disconnecting any vacuum pad reduces lifter's load
capacity.
To calculate the load capacity when some vacuum pads are disconnected, consult the Per-Pad
Load Capacity (see SPECIFICATIONS) and multiply by the number of pads currently in use. Make
sure all vacuum hoses are secure and routed to avoid being pinched, snagged, abraded or
otherwise damaged while the lifter is in operation.
WARNING: Make sure all vacuum hoses are coiled or routed so they cannot
become entangled, kinked or punctured during rotation or tilt.
To Connect/Disconnect Vacuum Hoses
The vacuum hose for each vacuum pad 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.
Note: Whenever a quick connector is disconnected, the
corresponding vacuum pad does not contribute to the load capacity, whether or not the pad is
mounted on the pad frame.
QUICK CONNECTOR
1 FEMALE END
2 MALE END

Rev 5.2/9-16 10 MRTARC8-DC: #35076RC
To Reposition (or Remove) Movable Pad Mounts
1) Remove the cotterless hitch pin from one movable pad mount.
2) Move the pad mount to the desired position on the pad frame and align the holes for the
cotterless hitch pin in the pad mount with the corresponding holes in the pad frame.
3) Secure the pad mount by pushing the cotterless hitch pin through the holes until the retaining
ball emerges on the far side of the pad mount.
4) Make sure that the vacuum hose connecting the vacuum pad to the vacuum system is not
pinched, kinked, cut or abraded and that it will not interfere with lifter operations.
5) Repeat steps #1-4 to position other pad mounts as needed. Always position vacuum pads in
a symmetrical arrangement, and make sure that all vacuum hoses are functioning correctly.
To remove a vacuum pad from the pad frame all together, disconnect the corresponding vacuum
hose and remove the pad mount as directed above. Make sure to store the pad and its mount in
a clean, dry location to protect them from environmental exposure.
Note: When you are assembling a linear configuration (see illustration), a third vacuum pad may
be mounted in line on each of two pad arms. Although these additional pads do help prevent
load breakage,
they must not be included in calculations of load capacity
, because each
arm of the pad frame has a maximum structural capacity of 350 lbs [159 kg].
To Install/Remove Extension Arms
1) Remove the cotterless hitch pin from one extension arm.
2) Insert the end of the extension arm in its socket on the pad frame, so that the holes align for
the cotterless hitch pin.
3) Secure the extension arm in the pad frame by pushing the cotterless hitch pin through the
holes until the retaining ball emerges on the far side of the pad frame socket.
4) Remove the end of the quick connector from the spring clip on the extension arm, and
connect the vacuum hose as directed above.
5) Repeat steps #1-4 to install other extension arms as needed for the pad frame configuration
desired.
6) To remove extension arms, reverse this procedure. Store removed extension arms in a clean,
dry location to protect them from environmental exposure.
About Secondary Rotation Stops
The lifter features two sets of holes in the rotation wear plate, which function as stops for the
rotation latch. Rotation stops allow the operator to secure the load at each quarter turn of the
rotation, keeping the long dimensions of an upright load either parallel or perpendicular to the
ground. The secondary stops are rotated approximately 30° from the primary stops, to provide
the same load positioning when the pad frame is in a linear configuration (see illustration).
Note: When you are assembling a linear configuration, be sure to install extension arms in the
two sockets as shown in the illustration, since the secondary rotation stops do not align correctly
when the arms are placed in the other two sockets.

Rev 5.2/9-16 11 MRTARC8-DC: #35076RC
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.3To 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).4This
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.
3Lifters 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.
4This 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 5.2/9-16 12 MRTARC8-DC: #35076RC
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).
• !!–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.

Rev 5.2/9-16 13 MRTARC8-DC: #35076RC
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 5.2/9-16 14 MRTARC8-DC: #35076RC
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).
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).
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.
5Since
5Consult CE Standard EN 457 for alternative ways to determine whether the alarm is clearly audible to operators.

Rev 5.2/9-16 15 MRTARC8-DC: #35076RC
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.
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 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 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.6In 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.
6The 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 5.2/9-16 16 MRTARC8-DC: #35076RC
TO APPLY THE PADS TO A LOAD
Powering up the Lifter
Place the lifter's power switch in the “on” ( ) position.7The 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.8This 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).
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 tilt or rotate unexpectedly (see TO LIFT AND MOVE THE LOAD: About the Tilt
Linkage and TO ROTATE THE LOAD EDGEWISE to follow), and it may also damage the lifter.9Make
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 on the load so that all pads are touching the contact surface.
7When the operator powers up the lifter, either the stand-by function or the apply function is automatically activated, depending
on which was used last. If the 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).
8The radio transmitter turns off automatically, after a period of inactivity. The operator can also operate the lifter without using
the radio transmitter, if desired.
9The 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.

Rev 5.2/9-16 17 MRTARC8-DC: #35076RC
Sealing the Pads against the Load
The apply/release switch is located on the movable control pendant. The movable control
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 extension cord.
WARNING: Do not disconnect control pendant during lifter operation.
The movable 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 apply/release switch to the “apply” ( ) position (clockwise) to make sure the apply
function is activated.
WARNING: Keep apply/release switch in “APPLY” position throughout lift.
Alternatively, if the lifter is equipped with a Remote Control System, press an apply button ( )
on either the radio transmitter or the lifter, to make sure the apply function is activated.
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 apply 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 apply the pad to a load, this condition
should correct itself with continued use.
Reading the Vacuum Gauge
The vacuum gauge indicates the current vacuum level in the lifter’s vacuum system. The green
range indicates vacuum levels sufficient for lifting the maximum load weight, whereas the red
range indicates vacuum levels that are
not
sufficient for lifting the maximum load weight. The
gauge needle should show a sudden surge in vacuum as the vacuum pads seal against the load.
If it takes more than 5 seconds for the vacuum level to reach 5" Hg [-17 kPa], press on any pad
that has not yet sealed.

Rev 5.2/9-16 18 MRTARC8-DC: #35076RC
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.10 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 power switch in the “off” ( ) position.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Monitor the vacuum gauge while the load is suspended for 5 minutes:
The lifter must
maintain a minimum vacuum level of 10" Hg [-34 kPa] during this time.
If not, the
load does not possess the characteristics required for using this lifter.11
10 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.
11 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.