WOOD'S POWR-GRIP MRTA611LDC User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBERS: MRTA611LDC,
MRTA6HV11FDC, MRTA610DCO
SERIAL NUMBER: ___________
(please see serial label and record number here)
QUADRA-TILT ROTATOR
DC-VOLTAGE
WITH DUAL VACUUM SYSTEM
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 14.0/5-13 1 MRTA6-DC: #35072
TABLE OF CONTENTS
SPECIFICATIONS............................................................................................................ 3
WARNINGS ..................................................................................................................... 4
OPERATING FEATURES................................................................................................... 5
ASSEMBLY....................................................................................................................... 6
TO SET UP THE LIFTER ................................................................................................................ 6
TO CHANGE THE PAD FRAME CONFIGURATION ................................................................................7
To Connect/Disconnect Vacuum Hoses..........................................................................................................8
To Reposition (or Remove) Movable Pad Mounts ...........................................................................................9
To Install/Remove Extension Arms................................................................................................................9
About Secondary Rotation Stops ...................................................................................................................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
TO APPLY THE PADS TO A LOAD..................................................................................................13
Positioning the Lifter on the Load ...............................................................................................................13
Sealing the Pads against the Load...............................................................................................................13
Reading the Vacuum Gauges......................................................................................................................14
Vacuum Level on Optimal Surfaces .............................................................................................................14
Vacuum Level on Other Surfaces ................................................................................................................14
TO LIFT AND MOVE THE LOAD ....................................................................................................15
About the Tilt Linkage ................................................................................................................................15
Engaging or Disengaging Tilt Locks.............................................................................................................15
Load Capacity and the Warning Light ..........................................................................................................15
Monitoring Vacuum Indicators ....................................................................................................................16
Low Vacuum Warning Buzzer .....................................................................................................................16
Controlling the Lifter and Load....................................................................................................................17
In Case of Power Failure ............................................................................................................................17
TO ROTATE THE LOAD EDGEWISE................................................................................................ 17
TO TILT THE LOAD ...................................................................................................................18
TO RELEASE THE PADS FROM THE LOAD .......................................................................................18
AFTER USING THE LIFTER..........................................................................................................19
Storing the Lifter........................................................................................................................................19

Rev 14.0/5-13 2 MRTA6-DC: #35072
MAINTENANCE ............................................................................................................. 20
INSPECTION SCHEDULE.............................................................................................................20
Every-Lift Inspection ..................................................................................................................................20
Frequent Inspection ...................................................................................................................................20
Periodic Inspection.....................................................................................................................................20
Infrequent Use...........................................................................................................................................21
TESTING SCHEDULE..................................................................................................................21
Operational Tests.......................................................................................................................................21
Load Test ..................................................................................................................................................21
MAINTENANCE SCHEDULE..........................................................................................................22
BATTERY TEST .........................................................................................................................22
BATTERY RECHARGE .................................................................................................................22
BATTERY CHARGER TEST ...........................................................................................................23
VACUUM PAD MAINTENANCE......................................................................................................23
Friction Coefficient .....................................................................................................................................23
Inspection .................................................................................................................................................23
Cleaning ....................................................................................................................................................24
VACUUM TEST .........................................................................................................................25
AIR FILTER MAINTENANCE ........................................................................................................26
Filter Function and Conditions Requiring Service ..........................................................................................26
Filter Service Procedures ............................................................................................................................26
VACUUM PUMP MAINTENANCE −DYNAFLO DV1032102 ...............................................................27
Replacing the Diaphragm ...........................................................................................................................27
Replacing the Gasket/Flap Valves................................................................................................................27
Replacing the Head Assembly .....................................................................................................................27
VACUUM PUMP MAINTENANCE −THOMAS 107CDC20 ..................................................................28
Replacing the Diaphragm ...........................................................................................................................28
Replacing the Intake Valve Flapper .............................................................................................................28
Replacing the Exhaust Valve Flapper and Head Gasket .................................................................................28
VACUUM SWITCH ADJUSTMENT ..................................................................................................29
Vacuum Switch Function ............................................................................................................................29
Conditions Requiring Readjustment .............................................................................................................29
Adjustment Procedure ................................................................................................................................30
REPLACEMENT PARTS LIST .......................................................................................... 31
LIMITED WARRANTY.................................................................................................... 32

Rev 14.0/5-13 3 MRTA6-DC: #35072
SPECIFICATIONS
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. When engaged, tilt locks ensure that the orientation of the
load is not compromised by accidental or unexpected forces.
Rotation Capability:
Manual, 360°, with automatic latching (when desired).
Vacuum Pump:
Diaphragm type, 1 SCFM [28 liters/minute] nominal airflow
Dual Vacuum System:
Two 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:
Two 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:
Two dial gauges indicate current vacuum level in positive inches of Hg and negative kPa.
Low Vacuum Warning Light: Red light is energized until vacuum level is sufficient to lift maximum load weight (higher than 16" Hg [-
54 kPa]) and whenever vacuum loss causes pump to re-engage.
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:
See separate instructions about optional features.
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.
1Optionally available with alternative rubber compounds for special applications (see REPLACEMENTS PARTS LIST).
2Standard with closed-cell foam rings for applications on rough or textured surfaces (see REPLACEMENTS PARTS LIST).
3The illustration under ASSEMBLY: TO CHANGE THE PAD FRAME CONFIGURATION shows the Pad Spread and Maximum Load Capacity
for many of the possible MRTA611LDC pad frame configurations.
4Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.
Description:
Designed for use with a crane or other hoisting equipment, the MRTA6-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:
MRTA611LDC
MRTA6HV11FDC
MRTA610DCO
Vacuum Pads:1
(Six of standard rubber, spring-mounted with 1/4" [7 mm] travel and #60 filter screen)
11" [28 cm] nominal diameter,
lipped (Model G3370)
10" [25 cm] nom. diameter,
lipped (Model HV11F)2
10" [25 cm] nom. diameter,
concave (Model G0750)
Pad Spread:3
(to outer edges)
Length - Maximum:
104½" [2656 mm]
103½" [2629 mm]
102½" [2604 mm]
- Minimum:
46¾" [1188 mm]
45¾" [1163 mm]
44¾" [1137 mm]
Width - Maximum:
58¾" [1491 mm]
57¾" [1466 mm]
56¾" [1442 mm]
- Minimum:
12½" [317 mm]
11½" [292 mm]
10½" [267 mm]
Load Capacity:3
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces4)
Per-Pad:
184 lbs [83.5 kg]
150 lbs [68 kg]
150 lbs [68 kg]
Maximum:
1100 lbs [500 kg]
900 lbs [410 kg]
900 lbs [410 kg]
Lifter Weight:
188 lbs [86 kg]
189 lbs [86 kg]
180 lbs [82 kg]
Power Source:
12 volts DC, 10 amps (with Thomas pump) or 3 amps (with Dynaflo pump)
Battery Capacity:
7 amp-hours

Rev 14.0/5-13 4 MRTA6-DC: #35072
WARNINGS
Powr-Grip is pleased to offer the most reliable vacuum lifters available.
Despite the high degree of security provided by this product, certain
precautions must be observed to protect the operator and others.
Always wear personal protective equipment that is appropriate for the material being handled.
Follow trade association guidelines.
Always operate the lifter under conditions approved for its design (see INTENDED USE:
OPERATING ENVIRONMENT).
Never operate a lifter that is damaged, malfunctioning, or missing parts.
Never operate a lifter if the sealing edge of any vacuum pad is cut or otherwise damaged.
Never remove or obscure warning labels.
Never operate a lifter if the Load Capacity or any warning appears to be missing or obscured.
Always make certain the contact surfaces of the load and all vacuum pads are clean prior to
applying the pads (see MAINTENANCE: VACUUM PAD MAINTENANCE).
Never exceed the Load Capacity or attempt to lift loads the lifter is not designed for (see
INTENDED USE: LOAD CHARACTERISTICS).
Never attempt to lift cracked or broken glass with this lifter.
Always position the vacuum pads correctly on the load prior to lifting (see OPERATION: TO APPLY
THE PADS TO A LOAD).
Never lift a load when any vacuum indicator shows inadequate vacuum.
Never touch the vacuum release controls during a lift. This may result in loss of vacuum and
release of the load.
Never allow people to ride on the lifter or the load being lifted.
Never lift a load higher than necessary or leave suspended loads unattended.
Never lift a load over people.
Always keep other personnel far enough away from the lifter to avoid injury in the event of an
unexpected load release.
Always place the power control in the inactive position and, when possible, disconnect the
power source before opening any enclosure on the lifter. (Only applicable to powered lifters)
Always remember that modifications to the lifter may compromise its safety. Wood’s Powr-Grip
cannot be responsible for the safety of a lifter that has been modified by the customer. For
consultation, contact Wood's Powr-Grip (see LIMITED WARRANTY).

Rev 14.0/5-13 5 MRTA6-DC: #35072
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 MRTA611LDC shown.
1 LIFT SPOOL
8 BATTERY TEST BUTTON
16 Cover for VACUUM PUMP
2 LIFT BAR
9 AIR FILTER
17 VACUUM PAD
3 INSTRUCTIONS CANISTER
10 VALVE HANDLE
with MOVABLE MOUNT
4 BATTERY
11 LOW VACUUM WARNING LIGHT
18 EXTENSION ARM
5 BATTERY GAUGE
12 VACUUM RESERVE TANK
19 TILT LOCK
6 VACUUM GAUGE
13 CONTROL HANDLE
20 BATTERY CHARGER
7 LOW VACUUM WARNING BUZZER
14 PAD FRAME
21 ROTATION RELEASE LEVER
15 QUICK CONNECTOR

Rev 14.0/5-13 6 MRTA6-DC: #35072
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.
Make sure the lifter's tilt locks are disengaged (see OPERATION: TO LIFT AND MOVE THE LOAD:
Engaging or Disengaging Tilt Locks). 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. Be careful to
avoid damaging any vacuum pads. 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.

Rev 14.0/5-13 7 MRTA6-DC: #35072
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 illustration
shows 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).
Standard MRTA611LDC pad frame shown.

Rev 14.0/5-13 8 MRTA6-DC: #35072
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 illustration).
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 removed, 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. Then clip the free end of the connector to the spring
clip on the extension arm.
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