WOOD'S POWR-GRIP MT2 Series User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBER: MT2HV11DCO
SERIAL NUMBER: ___________
(please see serial label and record number here)
MANUAL TILTER 300
DC-VOLTAGE
WITH DUAL VACUUM SYSTEM OPTION
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 11.3/4-18 1 MT2HV11DCO-DVS: #35082
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
Positioning the Lifter on the Load ...............................................................................................................10
Sealing the Pads against the Load...............................................................................................................10
Reading the Vacuum Gauges ......................................................................................................................11
Vacuum Level on Optimal Surfaces .............................................................................................................11
Vacuum Level on Other Surfaces ................................................................................................................11
TO LIFT AND MOVE THE LOAD ....................................................................................................12
Load Capacity and the Warning Light ..........................................................................................................12
Monitoring Vacuum Indicators ....................................................................................................................12
Monitoring the Low Vacuum Warning Buzzer ...............................................................................................12
Controlling the Lifter and Load....................................................................................................................13
In Case of Power Failure ............................................................................................................................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
BATTERY TEST......................................................................................................................... 17

Rev 11.3/4-18 2 MT2HV11DCO-DVS: #35082
BATTERY RECHARGE .................................................................................................................18
BATTERY CHARGER TEST ...........................................................................................................18
VACUUM PAD MAINTENANCE......................................................................................................18
Friction Coefficient .....................................................................................................................................18
Inspection .................................................................................................................................................19
Cleaning ....................................................................................................................................................19
VACUUM TEST .........................................................................................................................20
AIR FILTER MAINTENANCE ........................................................................................................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 107CDC20 ..................................................................23
Replacing the Diaphragm ...........................................................................................................................23
Replacing the Intake Valve Flapper .............................................................................................................23
Replacing the Exhaust Valve Flapper and Head Gasket .................................................................................23
VACUUM SWITCH ADJUSTMENT ..................................................................................................24
Vacuum Switch Function ............................................................................................................................24
Conditions Requiring Readjustment .............................................................................................................24
Adjustment Procedure ................................................................................................................................25
REPLACEMENT PARTS LIST .......................................................................................... 26
LIMITED WARRANTY.................................................................................................... 27

Rev 11.3/4-18 3 MT2HV11DCO-DVS: #35082
SPECIFICATIONS
Model Number:
MT2HV11DCO
Description:
Designed for use with a crane or other hoisting equipment, the MT2HV11DCO
lifter employs vacuum to hold a load for lifting, and it provides manual 90° tilt
movement for load manipulation.
Power Source:
12 volts DC, 10 amps (with Thomas pump) or 3 amps (with Dynaflo pump)
Battery Capacity:
7 amp-hours
Vacuum Pads:
Two 10" [25 cm] nominal diameter, lipped (Model HV11), standard rubber,
spring-mounted (¼" [7 mm] travel), with #60 filter screen
Pad Spread:
11" x 23" [279 mm x 584 mm] to outer edges
Maximum Load Capacity:
300 lbs [135 kg], based on Per-Pad Load Capacity of 150 lbs [68 kg], rated at
16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces1
Lifter Weight:
60 lbs [28 kg]
Tilt Capability:
Manual, 90°
Vacuum Pump:
Diaphragm type, 1 SCFM [28 liters/minute] nominal airflow
Vacuum Reserve Tanks:
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:
Dial gauges indicate current vacuum level in positive inches of Hg and negative
kPa.
Low Vacuum Warning
Light and Buzzer:
Red light and audio buzzer are 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.
Options:
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).
See separate instructions about other options.
Operating Elevation:
Maximum = 6000 feet [1828 meters]
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
Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.

Rev 11.3/4-18 4 MT2HV11DCO-DVS: #35082
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 11.3/4-18 5 MT2HV11DCO-DVS: #35082
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 MT2HV11DCO shown with Dual Vacuum System option.
1 LIFT BAIL
7 VALVE HANDLE
12 VACUUM RESERVE TANK
2 LIFT BAR
8 AIR FILTERS
13 BATTERY CHARGER
3 LOW VACUUM WARNING LIGHT
9 CONTROL HANDLE
14 BATTERY
4 BATTERY TEST BUTTON
10 VACUUM GAUGES
15 PAD FRAME
5 BATTERY GAUGE
11 VACUUM PAD
16 Enclosure with VACUUM PUMP
6 LOW VACUUM WARNING BUZZER
17 Enclosure with VACUUM SWITCH

Rev 11.3/4-18 6 MT2HV11DCO-DVS: #35082
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).
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift bail from slipping off under any circumstances.
Raise the lift bar to a vertical orientation and attach the hoisting equipment hook to the lift
bail.
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.
Use the hoisting equipment to raise the lifter out of the shipping container. Be careful to
avoid damaging the vacuum pads. 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 11.3/4-18 7 MT2HV11DCO-DVS: #35082
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.
2
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.
2
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 11.3/4-18 8 MT2HV11DCO-DVS: #35082
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.
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 11.3/4-18 9 MT2HV11DCO-DVS: #35082
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).
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.
3
Since
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.
3
Consult CE Standard EN 457 for alternative ways to determine whether the alarm is clearly audible to operators.

Rev 11.3/4-18 10 MT2HV11DCO-DVS: #35082
CAUTION: Examine each air filter regularly, and empty when necessary.
Two air filters help protect the vacuum generating system from contaminants. However, the
lifter is not intended for use on wet load surfaces because the filters would not prevent liquid
from entering the vacuum system. The operator must examine each filter bowl regularly and
remove any liquid or other contaminants found inside (see MAINTENANCE: AIR FILTER
MAINTENANCE).
TO APPLY THE PADS TO A LOAD
Positioning the Lifter on the Load
Make certain that the contact surfaces of the load and both 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 unexpectedly (see TO TILT THE LOAD to follow),
and it may also damage the lifter.
4
Make sure that both 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 apply the lifter to the load so
that both pads are touching the contact surface.
Sealing the Pads against the Load
Firm pressure at the center of the lifter
helps the vacuum pads begin to seal
against the load. Pull the valve handle
outward until it latches securely in the
“apply”( ) position (power on), as
shown. This energizes the vacuum
pump, causing air to be drawn at the
pads immediately. The red low vacuum
warning light also turns on and remains illuminated until the lifter attains sufficient vacuum to lift
the maximum load weight (see TO LIFT AND MOVE THE LOAD: Load Capacity and the Warning Light
to follow). The valve handle must remain in the “apply”( ) position throughout the entire lift.
WARNING: Keep valve handle latched securely in “APPLY” position throughout
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.
4
The 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.
TO APPLY

Rev 11.3/4-18 11 MT2HV11DCO-DVS: #35082
Reading the Vacuum Gauges
The lifter is equipped with 2 vacuum gauges, which indicate the current vacuum level in each
circuit of 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. Both gauge needles 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] on either vacuum gauge, press on any pad that has not
yet sealed.
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 both vacuum gauges, except when used at high
elevations (see SPECIFICATIONS: Operating Elevation). If not, make sure both vacuum switches
are adjusted correctly (see MAINTENANCE: VACUUM SWITCH ADJUSTMENT). If either 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 both vacuum gauges, due to leakage in the seal
between the vacuum pads and the load surface.
5
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, disconnect the electrical connector uniting the battery
with the vacuum generating system.
Note: After the test is completed, move the valve handle to the “release”( ) position (power
off ) before reconnecting the battery.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Monitor both vacuum gauges 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.
6
5
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.
6
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.

Rev 11.3/4-18 12 MT2HV11DCO-DVS: #35082
TO LIFT AND MOVE THE LOAD
Load Capacity and the Warning Light
The lifter's Load Capacity is rated at a vacuum level of 16" Hg [-54 kPa] (see SPECIFICATIONS).
After the lifter has attained this level, the vacuum pump turns off automatically, to conserve
battery energy. At the same time, the low vacuum warning light turns off, to indicate that the
lifter is ready to lift the maximum load weight.
WARNING: Never attempt to lift load while red warning light is illuminated.
Do not attempt to lift the load while the warning light is illuminated; such an attempt could result
in a load release and possible injury to the operator.
Monitoring Vacuum Indicators
The low vacuum warning light and both vacuum gauges must remain completely visible to the
operator, so that they can be monitored throughout the entire lift.
WARNING: Vacuum indicators must be visible to operator throughout entire lift.
If the vacuum system experiences leakage while the lifter is attached to the load, the vacuum
pump turns on automatically, as required to maintain sufficient vacuum for lifting the maximum
load weight. The low vacuum warning light also turns on and remains illuminated while the
pump is running, to signal the reduction in vacuum to the operator.
If the pump and warning light turn on while you are lifting a load, make sure both vacuum
gauges show a vacuum level of 16" Hg [-54 kPa] or higher. If not, move away and stay clear of
the load until it can be lowered to the ground or a stable support.
WARNING: Stay clear of any suspended load while vacuum level is lower than
16" Hg [-54 kPa].
Discontinue lifter use until the cause of the vacuum loss can be determined. If the pump runs at
intervals of ten minutes or less while the lifter is attached to clean, smooth, nonporous materials,
the leakage is likely to be in the vacuum system. In this event, perform the VACUUM TEST (see
MAINTENANCE) and inspect the vacuum pads for damage (see MAINTENANCE: VACUUM PAD
MAINTENANCE: Inspection). If the vacuum loss cannot be remedied immediately, perform
inspection and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.
Monitoring the Low Vacuum Warning Buzzer
Using the low vacuum warning buzzer requires minimal interaction from the operator. The
warning buzzer sounds an alarm until the lifter attains sufficient vacuum to lift the maximum load
weight (see SPECIFICATIONS: Load Capacity). After the lifter has attained this vacuum level, the
alarm stops sounding, to indicate that the lifter is ready to lift the load.
WARNING: Never attempt to lift load while alarm is sounding.
Do not attempt to lift the load while the alarm is sounding; such an attempt could result in a load
release and possible injury to the operator.
If the vacuum system experiences leakage while the lifter is attached to the load, the vacuum
pump turns on automatically, as required to maintain sufficient vacuum. The alarm also sounds
while the pump is running, to signal the reduction in vacuum to the operator. If the alarm

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sounds while you are lifting a load, make sure the vacuum gauge shows a vacuum level of 16"
Hg [-54 kPa] or higher. If not, immediately move away and stay clear of the load until it can be
lowered to the ground or a stable support.
WARNING: Stay clear of any suspended load while alarm is sounding.
Discontinue lifter use until the cause of the vacuum loss can be determined. Using the lifter on
contaminated, rough or porous surfaces may result in a vacuum loss, due to leakage between
the vacuum pads and the load. Since the alarm may sound in such circumstances, consult the
section TO APPLY THE PADS TO A LOAD: Vacuum Level on Other Surfaces to determine whether the
lifter can be used to lift the load. If the vacuum loss is due to any other cause, perform
inspection and maintenance as needed to identify and correct any deficiency before resuming
normal operation of the lifter.
Controlling the Lifter and Load
When the vacuum indicators show that the lifter is ready, use the hoisting equipment to raise the
lifter and load as needed to clear any obstacles in their path. Use the control handle to keep the
lifter and load in the desired orientation while they are suspended from the crane. Once
sufficient clearance is established, the load can be tilted as desired (see TO TILT THE LOAD to
follow).
In Case of Power Failure
The lifter is equipped with 2 vacuum reserve tanks, designed to maintain vacuum temporarily in
case of a power failure (ie, in battery).
WARNING: Stay clear of any suspended load in the event of a power failure.
Although the lifter is designed to support the load for at least 5 minutes without power, this
depends on many factors, including the condition of the load and the lifter’s vacuum system (see
INTENDED USE: LOAD CHARACTERISTICS and MAINTENANCE: VACUUM PAD MAINTENANCE,VACUUM
TEST). If a power failure occurs, keep all personnel clear of the suspended load until it can safely
be placed on the ground or a stable support. Correct any deficiency before resuming normal
operation of the lifter.
TO TILT THE LOAD
WARNING: Make sure load is positioned correctly on lifter (see TO APPLY);
unbalanced loads may tilt unexpectedly.
Remember that the load requires more vertical space when tilted
to the upright position, as well as more horizontal space when
tilted to the flat position. Make sure there is sufficient clearance
for the load to tilt without contacting the operator or any nearby
objects. Maintain a firm grip on the control handle to keep the
load under control at all times. Lift upward or press downward
on the control handle to tilt the load as desired, and continue to
apply pressure as necessary to maintain the desired load
orientation. If load size permits, maintain control with the handle
throughout the tilt. For loads with overhang, it may be necessary

Rev 11.3/4-18 14 MT2HV11DCO-DVS: #35082
to release the control handle as the load approaches the flat position. If so, keep the load under
control using hand cups or other appropriate means.
TO RELEASE THE PADS FROM THE LOAD
WARNING: Load must be fully supported before releasing vacuum pads.
When the load is at rest and fully
supported, pinch the valve release lever
against the valve handle, to unlatch the
handle. Then push the valve handle
inward to the “release” ( ) position
(power off), as shown. Do not attempt
to move the lifter until the vacuum pads
disengage completely from the load.
AFTER USING THE LIFTER
Leave the valve handle in the “release” ( ) position (power off).
CAUTION: Do not set the lifter against any surfaces which could soil or damage the
vacuum pads.
Use the hoisting equipment to gently lower the lifter onto a stable support; then detach the
hoisting equipment hook from the lift bail.
If the lifter is transported to another location, use the original shipping container and secure the
lifter so as to protect the vacuum pads and all other components from damage while in transit.
Storing the Lifter
Use the covers supplied to keep the vacuum pads clean.
!!-CE-!! In accordance with CE Standard EN 13155, the lifter is designed to rest on relatively
horizontal surfaces without tipping over. To store the lifter in this way, set the lifter with the
pads facing downward on a clean, smooth, flat surface. Then lower the lift bar to a horizontal
orientation and place a support under the lift bail.
Charge the battery completely when placing it in storage and at six-month intervals thereafter
(see MAINTENANCE: BATTERY RECHARGE). After charging the battery, disconnect the electrical
connectors uniting the battery to the battery charger and to the vacuum generating system, in
order to minimize power drainage. Preferred temperatures for storing the battery are 32° to 70°
Fahrenheit [0° to 21° Celsius]. Higher temperatures require the battery to be charged more
frequently. Storage at temperatures above 100° Fahrenheit [38° Celsius] should be avoided.
TO RELEASE

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MAINTENANCE
WARNING: Always make sure battery is disconnected before servicing lifter.
Note: One or more wiring diagrams are provided in the final section of this INSTRUCTIONS
manual for reference when servicing the lifter or trouble-shooting a deficiency.
INSPECTION SCHEDULE
Perform inspections routinely, according to the following frequency schedule:
Every-Lift Inspection
• Examine the vacuum pads and load surface for contamination or debris (see VACUUM PAD
MAINTENANCE to follow).
• Examine the vacuum pads, controls and indicators for visual damage (see VACUUM PAD
MAINTENANCE to follow).
• Test the battery for adequate charge (see BATTERY TEST to follow).
If a battery’s charge appears to be inadequate, charge and retest the battery (see BATTERY
RECHARGE to follow). If any other deficiency is detected during the inspection, correct it before
using the lifter and perform the Frequent Inspection to follow.
Frequent Inspection
( following every 20-40 hours’ use; or whenever lifter is out of service for 1 month or more )
• Examine the lifter’s structure for visual damage.
• Examine the vacuum system (including vacuum pads, fittings and hoses) for visual damage.
• Examine the air filter for conditions requiring service (see AIR FILTER MAINTENANCE to follow).
•Perform the VACUUM TEST to follow.
• Check for unusual vibrations or noises while operating the lifter.
If any deficiency is detected during the inspection, correct it before using the lifter and perform
the Periodic Inspection to follow.
Periodic Inspection
( following every 250-500 hours’ use; or whenever lifter is out of service for 1 year or more )
• Examine the entire lifter for external evidence of looseness, excessive wear, deformation,
cracks, excessive corrosion, dents to structural or functional components, cuts, or any
deficiency which might constitute a hazard.
• Inspect all parts of the electrical system for damage, wear or contamination that could
constitute a hazard, in compliance with all local codes and regulatory standards that are
relevant for the geographical region.

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CAUTION: Be sure to use appropriate cleaning methods for each type of electrical
component, as specified by codes and standards. Improper cleaning
can damage components.
• Keep a written record of all Periodic Inspections.
If any deficiency is detected during the inspection, correct it before using the lifter. If necessary,
return the lifter to Powr-Grip or an authorized dealer for repair (see LIMITED WARRANTY).
Infrequent Use
If a lifter is used less than 1 day in a 2-week period, perform the Periodic Inspection each time
before using the lifter .
TESTING SCHEDULE
Perform these tests when placing the lifter in service initially and each time following a repair or
modification . Correct any deficiency and retest before using the lifter.
Operational Tests
• Perform the VACUUM TEST to follow.
• Test all features and functions of the lifter (see OPERATING FEATURES, OPERATION and
MAINTENANCE).
Load Test
Prove that the lifter can lift 100% of its Maximum Load Capacity (see SPECIFICATIONS), using an
actual load or an equivalent simulation.
7
Employ the following method to test with an actual
load:
1) Place a test load with appropriate LOAD CHARACTERISTICS (see INTENDED USE) on a stable
support. Make sure the load is oriented in the upright position.
8
2) Apply the vacuum pads to the load as previously directed.
3) After the vacuum pump stops running, disconnect the electrical connector uniting the battery
with the vacuum generating system.
Note: After the test is completed, move the valve handle to the “release” ( ) position
(power off ) before reconnecting the battery.
4) Raise the load a minimal distance, to assure that it is supported by the lifter.
5) Hold the load for 5 minutes. The load must not slip or fall during this time period. If it does,
conduct a VACUUM TEST and inspect each vacuum pad as indicated under VACUUM PAD
MAINTENANCE: Inspection (see sections to follow). Correct any deficiency that is found and
retest the lifter.
7
ASME Standard B30.20 requires the lifter to be tested to 125% of its Load Capacity.
8
Flat Lifters are exempt from this requirement.

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Note: See MAINTENANCE topics to follow for additional directions about inspecting and testing
specific lifter components. Since the low vacuum warning buzzer is controlled by a vacuum
switch, consult the VACUUM SWITCH ADJUSTMENT discussion for inspection, testing and adjustment
procedures.
MAINTENANCE SCHEDULE
Unless specified elsewhere in this INSTRUCTIONS manual, the lifter does not require
maintenance on a routine basis. Instead, maintenance must be performed whenever a
deficiency is indicated by routine inspections or tests. Any maintenance warranted must be
performed before resuming normal operation of the lifter.
BATTERY TEST
The lifter is equipped with a battery gauge to help the operator evaluate
whether the battery has adequate energy for lifting. Factors such as the
condition of the battery, the time required to execute a lift, and the
porosity of the load combine to determine how much battery energy is
needed. It is the operator’s responsibility to evaluate these
conditions and to make sure the battery has sufficient energy to
complete a lift safely. Check the battery energy before every lift and
also at the end of each day's use, to decide whether a charge is needed
(see BATTERY RECHARGE to follow).
9
Never use the lifter when battery
energy registers lower than 50% (that is, when only red lights are illuminated), regardless of the
estimated energy requirement.
WARNING: Never use lifter if battery energy is lower than 50% of capacity.
While the valve handle is in the “apply” ( ) position (power on), the battery gauge
automatically monitors battery energy. However, the battery gauge shuts off temporarily while
the vacuum pump is running, to prevent an inaccurate reading. When the pumping cycle is
completed, the battery gauge requires a few moments to stabilize before it displays an accurate
energy reading again.
While the valve handle is in the “release” ( ) position (power off), the battery energy can be
checked manually using the battery test button. If the lifter has not been used since the battery
was charged, the battery gauge may falsely indicate an energy level that is higher than actual,
due to a “surface charge” on the battery. After the pump runs for approximately one minute, the
surface charge dissipates, allowing the operator to take an accurate energy reading.
9
The battery charger must be disconnected from its AC power source in order to test the battery energy; otherwise, the energy
reading on the battery gauge would not be accurate.

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BATTERY RECHARGE
Only use a battery charger supplied by or approved by Wood's Powr-Grip; other chargers may
reduce battery life. Charge the battery as soon as possible after any extended use of the lifter,
or whenever the battery gauge indicates diminished energy (see BATTERY TEST preceding).
Temperatures above 70° Fahrenheit [21° Celsius] require the battery to be charged more
frequently.
CAUTION: Charge the battery only while the valve handle is in “RELEASE” position
(power OFF). Operating the lifter when the charger is connected to an AC power source could
result in permanent damage to the charger.
Identify the input voltage marked on the battery charger, and plug it in to an appropriate power
source.
10
The power source must be equipped with a ground fault circuit interrupter, in order to
reduce the risk of electrical shocks.
WARNING: Power source must be equipped with ground fault circuit interrupter.
Usually a battery takes no more than 16 hours to charge completely, after which the charger
shuts off automatically. The blue light on the battery gauge also turns on, to indicate that the
battery is fully charged. Following long-term use, a battery gradually loses capacity. Replace it
whenever the operating time between recharging is no longer satisfactory.
BATTERY CHARGER TEST
Perform this test only when the battery is not fully charged (see BATTERY TEST preceding). While
the valve handle is in the “release” ( ) position (power off ) and the battery charger is
disconnected from any AC power source, use the battery test button to take an energy reading
on the battery gauge. Then plug the charger in to an appropriate AC power source and allow a
few moments for the battery gauge to show an accurate energy reading. If the charger is
functioning correctly, the energy reading should be higher when the charger is plugged in.
VACUUM PAD MAINTENANCE
Friction Coefficient
The friction coefficient represents the lifter's ability to resist load slippage when the load is
oriented in any position except horizontal. If the contact surfaces of either the load or the
vacuum pads are not clean, dry and in good condition, slippage is more likely to occur.
The Load Capacity of most Powr-Grip lifters is based on a friction coefficient of 1 (only Flat Lifters
are exempt from this requirement). However, a vacuum pad's ability to maintain this friction
coefficient is reduced by factors such as contamination, wear, age and exposure to sunlight, as
well as the condition of the load's contact surface (see INTENDED USE: LOAD CHARACTERISTICS).
Pads that have surface contamination must be thoroughly cleaned (see Cleaning discussion to
follow). Over time, the rubber in a pad may experience hardening or leaching of chemicals,
resulting in stiffness or surface glaze. Pads that exhibit wear, stiffness or glaze must be replaced.
10
Any external power supply must conform to all applicable local codes.