WPG MRPTHD89AC User manual

Rev 1.0/2-21 MRPTHD-AC: #350661
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 /
POWER TILTER,
HIGH-DUTY VERSION,
AC-VOLTAGE
Model numbers: MRPTHD89AC,
MRPTHD1211LAC (shown), MRPTHD2011LAC
KEEP FOR FUTURE REFERENCE

MRPTHD-AC: #35066 Rev 1.0/2-212

Rev 1.0/2-21 MRPTHD-AC: #350661
SPECIFICATIONS .....................................................................................3
SAFETY...................................................................................................6
OPERATING FEATURES............................................................................7
ASSEMBLY..............................................................................................8
TOCHANGE THE PAD FRAME CONFIGURATION ................................................10
Removing Parking Stands..................................................................................................11
Extending/Retracting Telescoping Pad Arms ....................................................................12
Connecting/Disconnecting Vacuum Hoses.......................................................................13
INTENDED USE .....................................................................................14
LOAD CHARACTERISTICS...............................................................................14
OPERATING ENVIRONMENT..........................................................................15
DISPOSAL OF THE LIFTER .............................................................................15
OPERATION..........................................................................................16
BEFORE USING THE LIFTER...........................................................................16
Taking Safety Precautions .................................................................................................16
Performing Inspections and Tests .....................................................................................16
TOATTACH THE PADS TO ALOAD ..................................................................17
Generating Airflow............................................................................................................17
Positioning the Lifter on the Load.....................................................................................17
Reading the Vacuum Gauge..............................................................................................18
TOLIFT AND MOVE THE LOAD......................................................................19
Interpreting the Lift Light..................................................................................................19
Watching Vacuum Indicators ............................................................................................19
Controlling the Lifter and Load .........................................................................................19
In Case of a Power Failure.................................................................................................20
TOROTATE THE LOAD .................................................................................21
TOTILT THE LOAD ......................................................................................22
TORELEASE THE PADS FROM THE LOAD .........................................................23
AFTER USING THE LIFTER.............................................................................23
Storing the Lifter ...............................................................................................................24
Transporting the Lifter ......................................................................................................24
INSPECTIONS AND TESTS......................................................................25
TABLE OF CONTENTS

MRPTHD-AC: #35066 Rev 1.0/2-212
INSPECTION SCHEDULE ................................................................................25
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
REPLACEMENT PARTS...........................................................................31
LIMITED WARRANTY ............................................................................32
TOOBTAIN REPAIRS OR WARRANTY SERVICE...................................................32
TABLE OF CONTENTS

Product
Description
Designed for use with hoisting equipment, the MRPTHD-AC lifters support loads using vacuum and
manipulate loads using manual 360° rotation and powered 90° tilt motions.
Model
Number MRPTHD89AC MRPTHD1211LAC MRPTHD2011LAC
Vacuum Pads
(standard rubber1
1...... Available with other rubber compounds for special purposes (see www.wpg.com).
)
Eight 9" [23 cm] nominal
diameter (Model VPFS9)
Twelve 11" [28 cm] nominal
diameter, lipped (Model G3370)
Twenty 11" [28 cm] nominal
diameter, lipped (Model G3370)
Pad Spread2
2...... These dimensions reflect pad configurations with the Maximum Load Capacity; other configurations are possible for lighter loads.
--------------------------------to outer edges---------------------------------
Length ‒Maximum 62" [157 cm] 140¼" [356 cm] 140½" [357 cm]
Length ‒Minimum 62" [157 cm] 64½" [164 cm] 88" [223 cm]
Width ‒Maximum 27½" [70cm] 56" [142 cm] 56" [142 cm]
Width ‒Minimum 27½" [70cm] 46¼" [117 cm] 56" [142 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 [57 kg]
Total: 1,000 lbs [455 kg]
Per pad: 167 lbs [75.5 kg]
Total: 2,000 lbs [905 kg]
Per pad: 150 lbs [68 kg]
Total: 3,000 lbs [1,360 kg]
Lifter
Weight 565 lbs [257 kg] 700 lbs [318 kg] 740 lbs [336 kg]
Power
Source See serial label for specific AC voltage, frequency and amperage.
Rotation
Capability Manual, 360°, with latching at every 18° of revolution (when required)
Tilt
Capability4
4...... Specifications shown for 120V AC lifters;characteristics may vary for other voltages.
Powered, 90°, with adjustable electronic speed controller; Maximum speed = approx 20 seconds per tilt
travel in one direction; Maximum duty = 50 tilts per hour
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 intended5
5...... Vacuum pads, filter elements and other wear-out items are excluded.
ASME Standard
BTH-1 Design Category "B", Service Class "0" (see www.wpg.com for more information)
Rev 1.0/2-21 MRPTHD-AC: #350663
!!–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.
SPECIFICATIONS

MRPTHD-AC: #35066 Rev 1.0/2-214
Note: Standard MRPTHD89AC (top) and MRPTHD1211LAC (bottom) are shown.
SPECIFICATIONS

Rev 1.0/2-21 MRPTHD-AC: #350665
Note: Standard MRPTHD2011LAC is shown.
SPECIFICATIONS

MRPTHD-AC: #35066 Rev 1.0/2-21 6
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 padsare 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.

Rev 1.0/2-21 MRPTHD-AC: #350667
Features shown here are underlined on their first appearance in each section following.1
1 VACUUM RESERVE TANK 2 VACUUM PUMP 3 Enclosure w/VACUUM SWITCH
4 VACUUM GAUGE 5 VACUUM LIFT LIGHT 6 PADFRAME
7 TELESCOPING PAD ARM 8 QUICK CONNECTOR 9 VACUUM PAD w/ MOVABLE
PAD MOUNT
10 POWER SWITCH 11 HOIST PENDANT HOLDER 12 AIR FILTER
13 VACUUM RELEASE BUTTON 14 TILT & ROTATION RELEASE TOGGLE SWITCH 15 MOVABLE CONTROL PENDANT
16 TILT SPEED CONTROLLER 17 LIFT BAR 18 CONTROL HANDLE
19 TILT ACTUATOR 20 TRANSFORMER (optional) 21 LIFT POINT
22 PARKING STAND (optional)
Note: A standard MRPTHD1211LAC is shown. Although some of the following photos do not
show this specific lifter, they all illustrate how this kind of lifter functions.
For information about specific parts, see “REPLACEMENT PARTS” on page 31 and/or any
separate instructions for Product Options.
1..... Some features may be optional, depending on the lifter in question.
OPERATING FEATURES

MRPTHD-AC: #35066 Rev 1.0/2-218
ASSEMBLY
1) Remove all shipping materials and save them with the shipping container for future use.
2)
Make sure power source has
ground fault circuit interrupter.
Connect the power cable:
2.1)
Wiring must be done by
qualified personnel, taking all
appropriate safety precautions.
Wire the female connector provided to
an appropriate power source, as
indicated on the label attached.
Without adequate power, lifter
could release load, resulting in
load damage and personal injury.
Note: Brown-outs, over-taxed generators,
extension cords and other conditions can
reduce power at the lifter.
2.2) Route the power cable so that it does not become tangled during operation.
2.3) Plug in the power cable:
2A 2B
Insert
the power cable’s male
connector into the female
connector and twist to secure
them together (fig. 2A-B).
3)
3A
As needed, adjust the lift point position (fig. 3A):1
3.1) Remove the cotter pins that secure the mounting
pins. Then remove the mounting pins.
3.2) Move the lift point to the position thatprovides
the best hang angle for the load.
3.3) Reinstall the mounting pins, and secure them with
the cotter pins.
Make sure all hardware for adjustable
lift point is installed securely before
using lifter.
Failure to install adjustable lift point hardware
securely can result in load damage or personal injury.
1..... Moving the lift point forward (away from operator) helps keep the hang angle vertical while the lifter is loaded; moving the lift spool rearward
(towards operator) helps keep the hang angle vertical while the lifter is unloaded.

Rev 1.0/2-21 MRPTHD-AC: #350669
4) Suspend the lifter from appropriate hoisting equipment:
4.1)
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.
4.2)
4D 4E 4F
Attach the hoisting hook to
the lift point (fig. 4D).
Make sure hook
has restraining
latch (circled in fig. 4E).
Only use rigging rated for Maximum
Load Capacity plus Lifter Weight.
Note: Use rigging (fig. 4F) as
needed to make sure the hook does
not interfere with the load.
4.3) Use the hoisting equipment to remove the lifter from the shipping container. Avoid
damaging the vacuum pads.
Note: The hoist control pendant can be attached to the lifter by placing it in the hoist
pendant holder provided.
5)
5A
Remove the pad covers (fig. 5A) and save them for future use.
6) If the lifter has an adjustable pad frame, configure the frame for optimal load support
(see “TOCHANGE THE PAD FRAME CONFIGURATION”on page 10).
7) Perform tests as required under “TESTING”on page 26.
ASSEMBLY

MRPTHD-AC: #35066 Rev 1.0/2-2110
TOCHANGE THE PAD FRAME CONFIGURATION
If the lifter has an adjustable pad frame, various configurations enable it to match different load
dimensions:1
MRPTHD1211LAC
MRPTHD2011LAC
1) Choose a configuration to maximize support across the load surface and to minimize load
overhang (see “LOAD CHARACTERISTICS”on page 14).
1..... The configurations shown preserve the Maximum Load Capacity (see SPECIFICATIONS); other configurations are possible for lighter loads.
ASSEMBLY

Rev 1.0/2-21 MRPTHD-AC: #3506611
2) Reposition telescoping pad arms and reposition or remove movable pad mounts as
needed (see following sections):
•
Route vacuum hoses as needed to prevent
damage to them during lifter operation.
To support the maximum load
weight, you must install all
vacuum pads on the pad frame
and connect all vacuum hoses to the pads (see following sections).
• To support larger load dimensions, you should extend telescoping pad arms on the
pad frame.
• To support smaller dimensions and weights, you may retract telescoping pad arms
or remove some vacuum pads and disconnect the corresponding vacuum hoses,
provided the lifter still has sufficient capacity to support the load in question.1
Note: To calculate the lifting capacity when some pads are removed, consult the
Per-Pad Load Capacity and multiply by the number of pads currently in use.
Use only symmetrical pad
frame configurations.
Caution: Always position pads in a symmetrical
configuration and use as many pads as possible, to
maximize lifting capacity and minimize load
overhang.
Removing Parking Stands
Parking stands must be removed to accommodate certain pad frame configurations:
1)
1A 2A
Remove the
cotterless hitch
pin (fig. 1A).
2) Slide the parking
stand off the pad
frame (fig. 2A).
3) Repeat steps 1-2
to remove the
other parking stands.
1..... Whenever a quick connector is disconnected, the corresponding vacuum pad does not contribute to the lifting capacity, whether or not the pad
is mounted on the pad frame.
ASSEMBLY

MRPTHD-AC: #35066 Rev 1.0/2-2112
Extending/Retracting Telescoping Pad Arms
1)
1B 2B
Remove the
cotterless hitch
pin and slide a
telescoping pad
arm into or out of
the pad frame
until the hitch pin
holes align at the
desired position
(fig. 1B).1
2) Reinsert the pin to secure the telescoping pad arm (fig. 2B).
3) Repeat steps 1-2 to reposition other telescoping pad arms, as needed.
Repositioning (or Removing) Movable Pad Mounts
1)
1A 2A 3A
Remove the
cotterless
hitch pin
from a
movable pad
mount (fig.
1A).
2) Move the pad mount to the desired position on the pad frame and align the pin holes (fig.
2A).
3) Reinsert the pin to secure the pad mount (fig. 3A).
4) Repeat steps 1-3 to position other pad mounts, as needed.
Removing or disconnecting
any vacuum pad reduces
lifting capacity.
To remove a vacuum pad altogether, disconnect the
corresponding vacuum hose (see next section) and
remove the pad mount as previously directed. Store
removed components in a clean, dry location.
1..... Pad arms should not be removed during normal operation of the lifter.
ASSEMBLY

1A 2A 1B 2B
Rev 1.0/2-21 MRPTHD-AC: #3506613
Connecting/Disconnecting Vacuum Hoses
Make sure quick connectors seal completely and all vacuum
hoses function correctly (see “Vacuum Test” on page 27).
To connect a vacuum hose, push the male and female ends of the quick connector together
until they lock (fig. 1B).
To disconnect a vacuum hose, move the release ring on the female end until the quick
connector separates (fig. 2B).
ASSEMBLY

MRPTHD-AC: #35066 Rev 1.0/2-2114
INTENDED USE
LOAD CHARACTERISTICS
Do NOT lift explosives, radioactive
substances or other hazardous materials.
Make sure the vacuum lifter is intended
to handle each load according to these
requirements:
• The load weight must not exceed the Maximum Load Capacity.
• The load must be a single piece of relatively nonporous material with a flat and
relatively smooth contact surface.1, 2To determine whether the load is too porous or
rough, perform the “Lifter/Load Compatibility Test” on page 26.
• The load's contact surface must be able to obtain a friction coefficient of 1 with the lifter's
vacuum pads(see “Pad-to-Load Friction Coefficient” on page 29). Otherwise, the
capacity should be derated appropriately.
• The load's surface temperature must not exceed the Operating Temperatures.3
• The load's minimum length and width are determined by the current Pad Spread
(see “SPECIFICATIONS” on page 3).
• The load's maximum length and width are determined by its allowable overhang.4
• 1" [2.5 cm] is the allowable thickness at Maximum Load Capacity.5
Note: Standard vacuum pads can stain or deform load surfaces with light colors or soft
coatings. Test such surfaces for damaging effects before using the lifter on them.6
1..... Although concave vacuum pads can also attach to some curved loads, curvature can reduce lifting capacity. Contact WPG for more information.
2..... A “single piece” of material includes curtainwall assemblies, unitized glazing systems and similar construction units.
3..... Vacuum pads made from a heat-resistant rubber compound can enable you to lift loads with higher surface temperatures. Contact WPG or an
authorized dealer for more information.
4..... The allowable overhang is the amount of load material that can extend sideways beyond the vacuum pads without breaking or otherwise being
damaged. This depends on the load material, its thickness, and the angle of handling (if any). Since every material has different physical
properties, the allowable overhang must be evaluated separately for each load type. Contact WPG or an authorized dealer for more
information.
5..... However, the allowable thickness increases as load weight decreases. Contact WPG for more information.
6..... Alternative rubber compounds are available for these purposes. Contact WPG or an authorized dealer for more information.

Rev 1.0/2-21 MRPTHD-AC: #3506615
OPERATING ENVIRONMENT
Make sure the vacuum lifter is intended for use in each work environment, given the following
restrictions:
•
Never use lifter in dangerous
environments.
Metal particles and similar
environmental contaminates
could result in vacuum pump failure.
This lifter is not intended for any environment
that is dangerous to the operator or damaging
to the lifter. Avoid environments containing
explosives, caustic chemicals and other
dangerous substances.
• The work environment is limited by the Operating Elevation and Operating
Temperatures.1, 2
• The lifter is not designed to be watertight.
Moisture can result in
reduced lifting capacity.
Do not
use it in rain or otherunsuitable conditions.
!!–CE–!! A secondary positive holding device is required to lift loads on construction sites.
DISPOSAL OF THE LIFTER
After the Service Life of the vacuum lifter has ended (see “SPECIFICATIONS” on page 3), dispose
of it in compliance with all local codes and applicable regulatory standards.
1..... Although lifter use may be possible at higher elevation, lifting capacity is reduced whenever the lifter is unable to attain vacuum in the green
range on the vacuum gauge. Contact WPG for more information.
2..... Special provisions may allow the lifter to operate outside the specified temperature range. Contact WPG for more information.
INTENDED USE

MRPTHD-AC: #35066 Rev 1.0/2-2116
OPERATION
BEFORE USING THE LIFTER
Determine whether the vacuum lifter is capable of each intended task (see “SPECIFICATIONS”
on page 3 and “INTENDED USE” on page 14). Then complete the following preparations:
Taking Safety Precautions
•
Read all directions and safety rules before using
lifter.
Always wear appropriate personal protective
equipment.
Be trained in all industry
and regulatory standards
for lifter operation in your
region.
• Follow trade association
guidelines about precautions needed for each load material.
Performing Inspections and Tests
• Follow the “INSPECTION SCHEDULE”on page 25 and “TESTING”on page 26.
•
Examine air filter regularly
and service when needed.
Examine the air filter and perform service
whenever its bowl contains liquid or other
contaminates or its element appears dirty (see
“AIR FILTER MAINTENANCE” in SERVICE MANUAL).1
1..... Lifters used on wet load surfaces must be equipped with 2 or more filters connected in series. See “OPERATING ENVIRONMENT”on page 15 for
restrictions.

Rev 1.0/2-21 MRPTHD-AC: #3506617
TOATTACH THE PADS TO ALOAD
Generating Airflow
Place the power switch in the “on” position ( ), to engage the
vacuum pump.1
Keep pump running
throughout lift.
The lifter is designed for the vacuum pump to run continuously.
Placing the power switch in the “off” position ( ) during lifter
operation could result in a load release and personal injury (see “In Case of a Power Failure” on
page 20).
Positioning the Lifter on the Load
1)
1A
Make sure the contact surfaces of the load and vacuum pads
are clean (fig. 1A; see “Pad Cleaning” on page 30).
2)
2A
Center the pad frame on the load (fig. 2A).2
1..... If any powered component fails to function while the power switch is in the “on” position, make sure the lifter is connected correctly to an
appropriate power source (see “ASSEMBLY”). If so, examine each circuit breaker (next to power switch) to determine whether it has
interrupted the electrical circuit to the component. Although you can reset the circuit breaker, the power interruption may indicate an
electrical problem that requires attention. Any fault must be corrected before resuming normal operation of the lifter.
2..... The lifter is designed to handle the maximum load weight when the load’s center of gravity is positioned within 2" [5 cm] of the pad frame’s
center point. Uncentered loads may rotate unexpectedly or interfere with the lifter’s tilt capability.
OPERATION

MRPTHD-AC: #35066 Rev 1.0/2-2118
3)
3A
Make sure all vacuum pads will fit on the
load and will be loaded evenly (fig. 3A).
Consult the Per-Pad Load Capacity.
4) Place the vacuum pads in contact with the
load surface until they begin to seal.1
Reading the Vacuum Gauge
A vacuum gauge shows the current vacuum level in positive inches of Hg and negative kPa:
•
1B 1C
Green range (>16" Hg [-54 kPa]): Vacuum level is
sufficient to lift the maximum load weight (fig.
1B).
• Red range (<16" Hg [-54 kPa]): Vacuum level is not
sufficient to lift the maximum load weight (fig.
1C).
If it takes more than 5 seconds for the vacuum level to
reach 5" Hg [-17 kPa], press on any vacuum pad that has not yet sealed.
Once the pads have sealed, the lifter should be able to maintain sufficient vacuum for lifting,
except when used above the maximum Operating Elevation.2If it does not, perform the
“Vacuum Test” on page 27.
Do not disconnect
control pendant.
Note: Disconnecting the movable control pendant during lifter
operation is likely to result in a load release and personal injury.
1..... Although a vacuum pad may become distorted during shipping or storage, this condition should correct itself with continued use.
2..... If the lifter is used above the maximum Operating Elevation (see “SPECIFICATIONS” on page 3), it may not be able to maintain sufficient vacuum
for lifting. Contact WPG for more information.
OPERATION