WPG MRPT1211LDC User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBER: MRPT1211LDC(O)
SERIAL NUMBER: ___________
(please see serial label and record number here)
MANUAL ROTATOR / POWER TILTER 2000
DC-VOLTAGE
READ ALL INSTRUCTIONS AND WARNINGS
BEFORE OPERATING THIS LIFTER
DESIGNED FOR THE MATERIALS HANDLING PROFESSIONAL
P.O. Box 368 –908 West Main
Laurel, MT USA 59044
phone [phone]
phone [phone]
fax [phone]

Rev 2.0/4-18 1 MRPT1211LDC: #35064
TABLE OF CONTENTS
SPECIFICATIONS............................................................................................................ 3
WARNINGS ..................................................................................................................... 4
OPERATING FEATURES................................................................................................... 5
ASSEMBLY....................................................................................................................... 6
INTENDED USE ............................................................................................................... 7
LOAD CHARACTERISTICS ................................................................................................... 7
OPERATING ENVIRONMENT ................................................................................................ 8
DISPOSAL OF THE LIFTER................................................................................................... 8
OPERATION .................................................................................................................... 9
BEFORE USING THE LIFTER ................................................................................................ 9
Taking Safety Precautions ............................................................................................................................9
Performing Inspections and Tests .................................................................................................................9
TO APPLY THE PADS TO A LOAD ........................................................................................ 10
Powering up the Lifter................................................................................................................................10
Positioning the Lifter on the Load ...............................................................................................................10
Sealing the Pads against the Load...............................................................................................................10
Reading the Vacuum Gauge .......................................................................................................................11
Vacuum Level on Optimal Surfaces .............................................................................................................11
Vacuum Level on Other Surfaces ................................................................................................................11
TO LIFT AND MOVE THE LOAD........................................................................................... 12
Load Capacity and the Lift Light..................................................................................................................12
Monitoring Vacuum Indicators ....................................................................................................................12
Controlling the Lifter and Load....................................................................................................................12
In Case of Power Failure ............................................................................................................................13
TO ROTATE THE LOAD EDGEWISE ...................................................................................... 13
TO TILT THE LOAD .......................................................................................................... 13
TO RELEASE THE PADS FROM THE LOAD .............................................................................. 14
AFTER USING THE LIFTER ................................................................................................ 14
Storing the Lifter........................................................................................................................................14
MAINTENANCE.............................................................................................................. 15
INSPECTION SCHEDULE ................................................................................................... 15
Every-Lift Inspection ..................................................................................................................................15
Frequent Inspection ...................................................................................................................................15
Periodic Inspection ....................................................................................................................................15
Infrequent Use ..........................................................................................................................................16
TESTING SCHEDULE ........................................................................................................ 16
Operational Tests.......................................................................................................................................16
Load Test ..................................................................................................................................................16
MAINTENANCE SCHEDULE ................................................................................................ 17

Rev 2.0/4-18 2 MRPT1211LDC: #35064
BATTERY TEST ............................................................................................................... 17
BATTERY RECHARGE ....................................................................................................... 18
VACUUM PAD MAINTENANCE............................................................................................ 19
Friction Coefficient .....................................................................................................................................19
Inspection .................................................................................................................................................19
Cleaning ....................................................................................................................................................19
VACUUM TEST ............................................................................................................... 20
AIR FILTER MAINTENANCE −LARGE ................................................................................. 21
Filter Function and Conditions Requiring Service ..........................................................................................21
Filter Service Procedures ............................................................................................................................21
VACUUM PUMP MAINTENANCE −DYNAFLO DV1032102..................................................... 22
Replacing the Diaphragm ...........................................................................................................................22
Replacing the Head Assembly .....................................................................................................................22
VACUUM PUMP MAINTENANCE ―THOMAS 2907CDC22/12................................................ 23
Replacing a Diaphragm (1) .........................................................................................................................23
Replacing an Intake Valve Flapper (6) .........................................................................................................23
Replacing a Set of Exhaust Valve Flappers (9 & 10) and a Head Gasket (12) .................................................23
VACUUM SWITCH ADJUSTMENT ........................................................................................ 24
Vacuum Switch Function ............................................................................................................................24
Conditions Requiring Readjustment .............................................................................................................24
Adjustment Procedure ................................................................................................................................25
LINEAR TILT ACTUATOR .................................................................................................. 26
REPLACEMENT PARTS LIST .......................................................................................... 27
LIMITED WARRANTY.................................................................................................... 28

Rev 2.0/4-18 3 MRPT1211LDC: #35064
SPECIFICATIONS
Model Number:
MRPT1211LDC(O)
Description:
Designed for use with a crane or other hoisting equipment, the MRPT1211LDC(O)
lifter employs vacuum to hold a load for lifting, and it provides manual 360° rotation
and powered 90° tilt movements for load manipulation.
Power Source:
12 volts DC, 32 amps
Battery Capacity:
35 amp-hours
Vacuum Pads:
Twelve 11" [28 cm] nominal diameter, lipped (Model G3370), standard rubber,
spring-mounted (¼" [7 mm] travel), with #60 filter screen
Maximum Pad Spread:
MRPT1211LDC
MRPT1211LDCO w/Telescoping Arms*
(to outer edges)
40" x 93" [1016 x 2362 mm]
40" x 120" [1016 mm x 3048 mm]
Lifter Weight:1
488 lbs [222 kg]
545 lbs [248 kg]
Load Capacity:
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces2)
Per-Pad:
167 lbs [75.5 kg]
Maximum:
2000 lbs [905 kg]
Rotation Capability:
Manual, 360°, with automatic locking at each ¼ revolution (when desired)
Tilt Capability:3
Powered, 90°; Speed = approx. 20 seconds; Duty = 58 tilts per hour
Vacuum Pumps:
2 diaphragm type, 1 SCFM [28 liters/minute] nominal airflow or
1 diaphragm type, 3 SCFM [85 liters/minute] nominal airflow
Vacuum Reserve Tank:
Vacuum reservoir helps prevent immediate vacuum loss in case of power failure and
extends battery life by reducing pump cycles required to maintain vacuum.
Vacuum Gauge:
Dial gauge indicates current vacuum level in positive inches of Hg and negative kPa.
Vacuum Lift Light:
Green light is energized whenever vacuum level is sufficient for lifting maximum
load weight (higher than 16" Hg [-54 kPa]).
Options:
* Available with Telescoping Pad Arms. This option enables a lifter to handle loads
with different dimensions from those of the standard pad frame.
See separate instructions about optional features.
Operating Elevation:
Maximum = 7000 ft [2133 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.wpg.com for more information)
!!–CE–!! Note: This symbol appears in the INSTRUCTIONS manual only when requirements of a CE Standard are different from requirements of
other standards that also apply to this vacuum lifter. CE requirements are mandatory in geographical areas where CE Standards apply, but may
be optional in other locations.
1
This weight does not include options; see serial label for weight including options, when applicable.
2
Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.
3
Rated under maximum load; tilt duty increases as load weight decreases.

Rev 2.0/4-18 4 MRPT1211LDC: #35064
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
attaching 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
ATTACH THE PADS TO A LOAD).
Never lift a load when any vacuum indicator shows inadequate vacuum.
Never touch the vacuum release controls during a lift. This may result in loss of vacuum and
release of the load.
Never allow people to ride on the lifter or the load being lifted.
Never lift a load higher than necessary or leave suspended loads unattended.
Never lift a load over people.
Always keep other personnel far enough away from the lifter to avoid injury in the event of an
unexpected load release.
Always place the power control in the inactive position and, when possible, disconnect the
power source before opening any enclosure on the lifter. (Only applicable to powered lifters)
Always remember that modifications to the lifter 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 2.0/4-18 5 MRPT1211LDC: #35064
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 MRPT89DC shown;
Some details are different for Model MRPT1211LDC(O).
1 LIFT BAR
8 MOVABLE CONTROL PENDANT
15 BATTERY CHARGER
2 LIFT BAIL
9 Enclosure with VACUUM PUMP(S)
16 VACUUM RESERVE TANK
3 VACUUM PAD
10 VACUUM GAUGE
17 AIR FILTER
4 BATTERY ENCLOSURE
11 VACUUM LIFT LIGHT
18 BATTERY GAUGE
5 POWER SWITCH
12 TILT TOGGLE SWITCH
19 BATTERY TEST BUTTON
6 PAD FRAME
13 ROTATION RELEASE LEVER
20 Enclosure with VACUUM SWITCH
7 APPLY/RELEASE SWITCH
14 CONTROL HANDLES
21 TILT ACTUATOR

Rev 2.0/4-18 6 MRPT1211LDC: #35064
ASSEMBLY
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).
Raise the lift bar of the lifter to a vertical orientation: Engage the tilt actuator as though
tilting a load to the flat position (see OPERATION: TO TILT THE LOAD); at the same time,
manually lift on the lift bar to assist the tilt actuator’s movement, in order to avoid damaging
the actuator.
CAUTION: Always provide manual assistance to tilt actuator when raising lift bar
to vertical position.
Attach the hoisting equipment hook to the lift bail, and use the hoisting equipment to raise
the lifter out of the shipping container. Be careful to avoid damaging any vacuum pads.
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift bail from slipping off under any circumstances.
Note: Some hoisting equipment hooks could interfere with an upright load that extends
beyond the lifter's pad frame. If the load would contact the hook during lifter operation, the
operator must prevent this by attaching a sling (or other rigging that does not interfere with
the load) between the hook and the lift bail.
WARNING: Any sling used must be rated to carry maximum load weight plus
lifter weight.
A hoist control pendant can be attached to the lifter by inserting it into the pendant basket
provided. Remove the pad covers and save them for use whenever the lifter is stored.
3) Connect the electrical connectors uniting the battery to the battery charger and the vacuum
generating system. Now the lifter is operational.
4) Perform Operational and Load Tests for the lifter as directed in MAINTENANCE: TESTING
SCHEDULE.

Rev 2.0/4-18 7 MRPT1211LDC: #35064
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.
4
To 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, or capacity should be derated appropriately. If necessary, contact
Wood's Powr-Grip for help in conducting a friction test.
• In order to avoid damaging the vacuum pads, the load's surface temperature must not exceed
the allowable Operating Temperatures (see SPECIFICATIONS). However, if such an
application cannot be avoided, Wood's Powr-Grip does offer a heat-resistant rubber
compound and other solutions 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.
• 1" [2.5 cm] is the maximum allowable thickness of loads at the maximum weight (see
SPECIFICATIONS: Load Capacity). However, allowable thickness increases as load weight
decreases. If necessary, contact Wood’s Powr-Grip for help in determining the maximum
thickness permitted when handling any specific load.
Note: Vacuum pads can stain or deform load surfaces with light colors or soft coatings. The
operator should test such surfaces for detrimental effects before using the lifter on them.
4
Lifters 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.

Rev 2.0/4-18 8 MRPT1211LDC: #35064
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.
• !!–CE–!! If the lifter is employed in a construction area, CE Standard EN 13155 requires the
use of a secondary positive holding device, such as a sling system, designed to support the
load in case of a vacuum system failure.
WARNING: Where CE Standards apply, secondary positive holding device is
required for lifting loads in construction zones.
DISPOSAL OF THE LIFTER
After the vacuum lifter has reached the end of its service life, you must dispose of the lifter in
compliance with all local codes and regulatory standards that are relevant for the geographical
region.
Note: This lifter is equipped with a battery, which may be subject to special disposal regulations.