WPG MRT411LDC User manual

Rev 29.0/10-19 MRT4-DC: #35070i
INTENDED FOR USE BY SKILLED
PROFESSIONALS • READ AND
UNDERSTAND BEFORE OPERATING
OPERATING
INSTRUCTIONS 908 W. Main • P.O. Box 368
Laurel, MT USA 59044
800-548-7341 (phone)
406-628-8231 (phone)
406-628-8354 (fax)
www.WPG.com
Record serial number in blank space above (to locate, see serial
label on the product).
MANUAL ROTATOR/TILTER,
DC-VOLTAGE
Model numbers: MRT411LDC (shown), MRT49DC,
MRT4HV11DC
KEEP FOR FUTURE REFERENCE

MRT4-DC: #35070 Rev 29.0/10-19ii

Rev 29.0/10-19 MRT4-DC: #35070iii
SPECIFICATIONS .....................................................................................3
SAFETY...................................................................................................5
OPERATING FEATURES............................................................................6
ASSEMBLY..............................................................................................7
TOCHANGE THE PAD FRAME CONFIGURATION ..................................................9
Installing/Removing Extension Arms and Repositioning Vacuum Pads ............................10
Using Secondary Rotation Stops .......................................................................................11
INTENDED USE .....................................................................................12
LOAD CHARACTERISTICS...............................................................................12
OPERATING ENVIRONMENT..........................................................................13
DISPOSAL OF THE LIFTER .............................................................................13
OPERATION..........................................................................................14
BEFORE USING THE LIFTER...........................................................................14
Taking Safety Precautions .................................................................................................14
Performing Inspections and Tests .....................................................................................14
Checking the Battery.........................................................................................................15
TOATTACH THE PADS TO ALOAD ..................................................................16
Positioning the Lifter on the Load.....................................................................................16
Sealing the Pads on the Load............................................................................................17
Reading the Vacuum Gauge..............................................................................................17
TOLIFT AND MOVE THE LOAD......................................................................18
Interpreting the Warning Light and Optional Warning Buzzer .........................................18
Watching Vacuum Indicators ............................................................................................18
Controlling the Lifter and Load .........................................................................................19
In Case of a Power Failure.................................................................................................19
TOROTATE THE LOAD .................................................................................20
TOTILT THE LOAD ......................................................................................21
TORELEASE THE PADS FROM THE LOAD .........................................................23
AFTER USING THE LIFTER.............................................................................23
Storing the Lifter ...............................................................................................................23
INSPECTIONS AND TESTS......................................................................25
INSPECTION SCHEDULE ................................................................................25
TABLE OF CONTENTS

MRT4-DC: #35070 Rev 29.0/10-19iv
TESTING ...................................................................................................26
Lifter/Load Compatibility Test...........................................................................................26
Operational Tests ..............................................................................................................27
Vacuum Test......................................................................................................................27
Rated Load Test.................................................................................................................28
MAINTENANCE ....................................................................................29
VACUUM PAD MAINTENANCE.......................................................................29
Pad-to-Load Friction Coefficient .......................................................................................29
Pad Inspection ..................................................................................................................29
Pad Cleaning .....................................................................................................................30
BATTERY RECHARGE....................................................................................31
REPLACEMENT PARTS...........................................................................32
LIMITED WARRANTY ............................................................................33
TOOBTAIN REPAIRS OR WARRANTY SERVICE...................................................33
TABLE OF CONTENTS

Rev 29.0/10-19 MRT4-DC: #350703
Product
Description
Designed for use with hoisting equipment, MRT4-DC lifters support loads using vacuum and manipulate
loads using manual 360° rotation and manual 90° tilt motions.
Model
Number MRT49DC MRT4HV11DC MRT411LDC
Vacuum Pads1
(4 each, standard rubber)
1...... Available with other rubber compounds for special purposes (see www.WPG.com).
9" [23 cm] nom. diameter
(Model VPFS9)
10" [25 cm] nom. diameter,
lipped (Model HV11)
11" [28 cm] nom. diameter,
lipped (Model G3370)
Pad Spread2
2...... The illustrations under “TOCHANGE THE PAD FRAME CONFIGURATION” on page 9 show the Pad Spread for all approved pad frame configurations.
---------------------------- (to outer edges) ----------------------------
Length ‒Maximum 75¼" [192 cm] 77¼" [197 cm] 78¼" [199 cm]
Length ‒Minimum 29¾" [76 cm] 31¾" [81 cm] 32¾" [83 cm]
Width ‒Maximum 46½" [119 cm] 48½" [124 cm] 49½" [126 cm]
Width ‒Minimum 12¾" [33 cm] 14¾" [38 cm] 15¾" [40 cm]
Maximum Load
Capacity3
3...... The Maximum Load Capacity is rated at a vacuum of 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces with a friction coefficient of 1. Pad
compound, load rigidity, strength, surface conditions, overhang, angle, center of gravity and temperature can also affect the lifting capacity. A “qualified
person” should evaluate the effective lifting capacity for each use (see definition under “Rated Load Test” on page 28).
Per-Pad 125 lbs [56.5 kg] 150 lbs [68 kg] 175 lbs [80 kg]
Total 500 lbs [225 kg] 600 lbs [270 kg] 700 lbs [320 kg]
Lifter
Weight 135 lbs [62 kg]
Power
System 12 volts DC, 3.5 amps
Battery
Capacity 7 amp-hours
Rotation
Capability Manual, 360°, with latching at each ¼ turn (when required)
Tilt
Capability Manual, 90°, with automatic locking in vertical position
Product
Options See separate instructions about options.
Operating
Elevation Up to 6,000' [1,828 m]
Operating
Temperatures 32° — 104° F [0° — 40° C]
Service
Life 20,000 lifting cycles, when used and maintained as intended4
4...... Vacuum pads, filter elements and other wear-out items are excluded.
!!–CE–!! This symbol appears only when a CE Standard is different from other applicable standards. CE requirements are
mandatory in the European Union, but may be optional elsewhere.
ASME Standard
BTH-1 Design Category "B", Service Class "0" (see www.WPG.com for more information)
SPECIFICATIONS

MRT4-DC: #35070 Rev 29.0/10-194
SPECIFICATIONS
Note: A standard MRT411LDC is shown.

Rev 29.0/10-19 MRT4-DC: #350705
SAFETY
Wear personal protective
equipment that is appropriate for
the load material. Follow trade
association guidelines.
Do not remove or obscure safety
labels.
Do not make any modifications to
the lifter (see “LIMITED
WARRANTY”).
Use the lifter only in an approved
“OPERATING ENVIRONMENT”(see
“INTENDED USE”).
Do not use a lifter that is damaged,
malfunctioning, or missing parts.
Do not use a lifter if the sealing
edge of any vacuum pad is cut or
otherwise damaged.
Do not use a lifter to lift cracked or
broken glass.
Do not exceed the Maximum
Load Capacity or lift loads the
lifter is not designed for (see
“INTENDED USE”).
Do not use a lifter if the
Maximum Load Capacity or
any safety label appears to be
missing or obscured.
Make sure the contact surfaces of
the load and vacuum pads are clean
before attaching the lifter (see
“MAINTENANCE”).
Position the vacuum pads correctly
on the load before lifting (see
“OPERATION: Positioning the Lifter
on the Load”).
Do not lift a load if any vacuum
indicator shows inadequate
vacuum.
Keep unauthorized personnel away
from the lifter, to avoid injury in
case of an unintended load release.
Do not touch the vacuum release
controls during a lift.
Do not allow people to ride on the
lifter or the load.
Do not lift a load higher than
necessary or leave suspended loads
unattended.
Do not position a loaded or
unloaded lifter over people.
Before servicing a powered lifter,
place the power control in the
inactive position and, when
possible, disconnect the power source.

MRT4-DC: #35070 Rev 29.0/10-196
Features shown here are underlined on their first appearance in each section following.
1 LIFT POINT 8 BATTERY TEST BUTTON 15 CONTROL HANDLE
2 LIFT BAR 9 LOW VACUUM WARNING BUZZER (optional) 16 VACUUM RESERVE TANK
3 BATTERY 10 VALVE HANDLE 17 PAD FRAME
4 TILT RELEASE LEVER 11 VACUUM GAUGE 18 VACUUM PAD
5 LOW VACUUM WARNING LIGHT 12 ROTATION WEAR PLATE 19 EXTENSION ARM
6 Enclosure with VACUUM SWITCH 13 Cover for VACUUM PUMP 20 BATTERY CHARGER
7 BATTERY GAUGE 14 ROTATION RELEASE LEVER Not shown: INSTRUCTIONS CANISTER
Note: The lifter model MRT411LDC is shown here. Although some of the following photos do not
show this specific lifter, they all illustrate how this kind of lifter functions.
OPERATING FEATURES

Rev 29.0/10-19 MRT4-DC: #350707
1)
2A 2B
Remove all lifter restraints and save them with the shipping container for future use.
2) Suspend the lifter from appropriate hoisting equipment:
2.1)
Select a crane and/or hoist rated for the Maximum Load Capacity plus the
Lifter Weight.
Note: Any lifter use must comply with all statutory or regulatory standards for
hoisting equipment in your region.
2.2) Disengage any tilt locks or latches, and raise the lift bar (figs. 2A-C).
2.3) Attach the hoisting hook to the
lift point (figs. 2D-E).
2D 2E
Make
sure hook
has restraining
latch (circled).
2F
Only use rigging rated for Maximum Load
Capacity plus Lifter Weight.
Use
rigging (fig. 2F) as needed to
make sure the hook does not
interfere with the load.
ASSEMBLY
2C

MRT4-DC: #35070 Rev 29.0/10-198
2.4) Use the hoisting equipment to remove the lifter from the shipping container. Avoid
damaging the vacuum pads.
3B3A
3)
3C
3D
Connect the electrical connectors (figs. 3A-B and
figs. 3C-D).
4)
4A
Assemble the pad frame for optimal load support
(see “TOCHANGE THE PAD FRAME CONFIGURATION”on page 9).
Remove the pad covers (fig. 4A) and save them for future use.
5) Perform tests as required under “TESTING”on page 26).
ASSEMBLY