WPG PT410AC User manual

KEEP FOR FUTURE REFERENCE
INSTRUCTIONS
International Version
MODEL NUMBER: PT410AC
SERIAL NUMBER: ___________
(please see serial label and record number here)
"WINDSHIELD LIFTER"
POWER TILTER
AC-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 14.0/4-18 1 PT410AC: #35140
TABLE OF CONTENTS
TABLE OF CONTENTS ...................................................................................................... 1
SPECIFICATIONS............................................................................................................ 3
WARNINGS ..................................................................................................................... 4
OPERATING FEATURES................................................................................................... 5
ASSEMBLY....................................................................................................................... 6
INTENDED USE ............................................................................................................... 8
LOAD CHARACTERISTICS ................................................................................................... 8
OPERATING ENVIRONMENT ................................................................................................ 9
DISPOSAL OF THE LIFTER................................................................................................... 9
OPERATION .................................................................................................................. 10
BEFORE USING THE LIFTER .............................................................................................. 10
Taking Safety Precautions ..........................................................................................................................10
Performing Inspections and Tests ...............................................................................................................10
TO APPLY THE PADS TO A LOAD ........................................................................................ 11
Generating Vacuum Flow............................................................................................................................11
Positioning the Lifter on the Load ...............................................................................................................11
Reading the Vacuum Gauge .......................................................................................................................12
Vacuum Level on Optimal Surfaces .............................................................................................................12
Vacuum Level on Other Surfaces ................................................................................................................12
TO LIFT AND MOVE THE LOAD........................................................................................... 13
Load Capacity and the Lift Light..................................................................................................................13
Monitoring Vacuum Indicators ....................................................................................................................13
Controlling the Lifter and Load....................................................................................................................13
In Case of Power Failure ............................................................................................................................14
TO TILT THE LOAD .......................................................................................................... 14
TO RELEASE THE PADS FROM THE LOAD.............................................................................. 14
AFTER USING THE LIFTER ................................................................................................ 15
Storing the Lifter........................................................................................................................................15
MAINTENANCE.............................................................................................................. 16
INSPECTION SCHEDULE ................................................................................................... 16
Every-Lift Inspection ..................................................................................................................................16
Frequent Inspection ...................................................................................................................................16
Periodic Inspection ....................................................................................................................................16
Infrequent Use ..........................................................................................................................................17
TESTING SCHEDULE ........................................................................................................ 17
Operational Tests.......................................................................................................................................17
Load Test ..................................................................................................................................................17
MAINTENANCE SCHEDULE ................................................................................................ 17

Rev 14.0/4-18 2 PT410AC: #35140
VACUUM PAD MAINTENANCE............................................................................................ 18
Friction Coefficient .....................................................................................................................................18
Inspection .................................................................................................................................................18
Cleaning ....................................................................................................................................................19
VACUUM TEST ............................................................................................................... 19
AIR FILTER MAINTENANCE −LARGE ................................................................................. 20
Filter Function and Conditions Requiring Service ..........................................................................................20
Filter Service Procedures ............................................................................................................................20
VACUUM PUMP MAINTENANCE −GAST 0523-101Q-SG588DX .......................................... 21
Disassembly/Reassembly Procedure ............................................................................................................21
VACUUM PUMP MAINTENANCE −GAST N70....................................................................... 22
A) Dissembling the Head Assembly .............................................................................................................22
B) Replacing the Head-Side Leaf Valves.......................................................................................................22
C) Replacing the Cylinder-Side Leaf Valves ..................................................................................................22
D) Dissembling the Cylinder Assembly.........................................................................................................22
E) Replacing the Cylinders and Cups ...........................................................................................................23
F) Replacing O-Rings and Reassembling the Head Assembly.........................................................................23
LINEAR TILT ACTUATOR .................................................................................................. 24
VACUUM SWITCH ADJUSTMENT ........................................................................................ 25
Vacuum Switch Function ............................................................................................................................25
Conditions Requiring Readjustment .............................................................................................................25
Adjustment Procedure ................................................................................................................................25
REPLACEMENT PARTS LIST .......................................................................................... 26
LIMITED WARRANTY................................................................................................. 27

Rev 14.0/4-18 3 PT410AC: #35140
SPECIFICATIONS
Model Number:
PT410AC
Description:
Designed for use with a crane or other hoisting equipment, the PT410AC lifter
employs vacuum to hold a load for lifting, and it provides
powered 90° tilt
movement for load manipulation.
Power Source:
See serial number plate for specific AC voltage, frequency and amperage.
Vacuum Pads:
Four 10" [25 cm] nominal diameter, concave (Model G0750), standard rubber,
spring-mounted (approx. 1" [2.5 cm] travel), with #60 filter screen
Pad Spread:
17" x 45½" [433 mm x 1157 mm] to outer edges
Load Capacity:
(rated at 16" Hg [-54 kPa] on clean, smooth, nonporous flat surfaces
1
)
Per-Pad
125 lbs [56.5 kg]
Maximum
500 lbs [225 kg]
Lifter Weight:
165 lbs [75 kg]
Tilt Capability:
Powere
d, 90°; Speed = approx. 6.5 seconds; Duty = 81 tilts per hour
Vacuum Pump:
Rotary vane type, 4 SCFM [113 liters/minute] nominal airflow
or
Wobble piston, 4 SCFM [113 liters/minute] nominal airflow
Vacuum Reserve Tank:
Vacuum reservoir helps prevent immed
iate vacuum loss in case of power
failure.
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" [-54 kPa]).
Options:
See separate instructions about optional features.
Operating Elevation:
Maximum = 10,000 feet [3048 meters]
Operating Temperatures: 32° to 100° F [0° to 38° C]
Service
Life:
This lifter is designed to have a servi
ce 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.
1Load Capacity is based on a friction coefficient of 1; see MAINTENANCE: VACUUM PAD MAINTENANCE: Friction Coefficient for
additional information.

Rev 14.0/4-18 4 PT410AC: #35140
WARNINGS
Powr-Grip is pleased to offer the most reliable vacuum lifters available. Despite
the high degree of security provided by this product, certain precautions
must be observed to protect the operator and others.
Always wear personal protective equipment that is appropriate for the material being handled.
Follow trade association guidelines.
Always operate the lifter under conditions approved for its design (see INTENDED USE:
OPERATING ENVIRONMENT).
Never operate a lifter that is damaged, malfunctioning, or missing parts.
Never operate a lifter if the sealing edge of any vacuum pad is cut or otherwise damaged.
Never remove or obscure warning labels.
Never operate a lifter if the Load Capacity or any warning appears to be missing or obscured.
Always make certain the contact surfaces of the load and all vacuum pads are clean prior to
applying the pads (see MAINTENANCE: VACUUM PAD MAINTENANCE).
Never exceed the Load Capacity or attempt to lift loads the lifter is not designed for (see
INTENDED USE: LOAD CHARACTERISTICS).
Never attempt to lift cracked or broken glass with this lifter.
Always position the vacuum pads correctly on the load prior to lifting (see OPERATION: TO APPLY
THE PADS TO A LOAD).
Never lift a load when any vacuum indicator shows inadequate vacuum.
Never touch the vacuum release controls during a lift. This may result in loss of vacuum and
release of the load.
Never allow people to ride on the lifter or the load being lifted.
Never lift a load higher than necessary or leave suspended loads unattended.
Never lift a load over people.
Always keep other personnel far enough away from the lifter to avoid injury in the event of an
unexpected load release.
Always place the power control in the inactive position and, when possible, disconnect the
power source before opening any enclosure on the lifter. (Only applicable to powered lifters)
Always remember that modifications to the lifter may compromise its safety. Wood’s Powr-Grip
cannot be responsible for the safety of a lifter that has been modified by the customer. For
consultation, contact Wood's Powr-Grip (see LIMITED WARRANTY).
Always employ a ground fault circuit interrupter when connecting the power cable to the power
source.

Rev 14.0/4-18 5 PT410AC: #35140
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 PT410AC shown.
1 LIFT SPOOL
6 VACUUM GAUGE
12 PAD FRAME
2 POWER SWITCH
7 AIR FILTER
13 VACUUM RELEASE BUTTON
3 VACUUM LIFT LIGHT
8 VACUUM PAD
14 MOVABLE CONTROL PENDANT
4 LIFT BAR
9 ALTERNATIVE LOCATION FOR PENDANT
15 TILT TOGGLE SWITCH
5 Enclosure with
10 VACUUM RESERVE TANK
16 VACUUM PUMP
VACUUM SWITCH
11 CONTROL HANDLES
17 TILT ACTUATOR

Rev 14.0/4-18 6 PT410AC: #35140
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) Connect the power cable from the lifter to the power source as follows: Identify the label
indicating the voltage range (V) and frequency (Hz) required to power the lifter (located
where power cable connects to lifter). Then wire the female connector provided to an
appropriate, current-protected power source.
WARNING: Wiring must be done by qualified personnel, taking all appropriate
safety precautions.
Note: Be advised that brown-outs, overtaxed generators, extension cords, and other
conditions can reduce power input at the lifter. If the lifter does not receive adequate power
while lifting, this could result in an unexpected load release and a risk of injury to the
operator or others.
WARNING: Lifter that does not receive adequate power while lifting could
experience unexpected load release.
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.
Make certain the power cable is routed so that it does not become tangled while operating
the lifter or hoisting equipment. Then push the power cable’s male connector into the female
connector and twist to secure them together.
3) 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).
CAUTION: Always provide manual assistance to tilt actuator when raising lift bar
to vertical position.
Raise the lift bar of the lifter to a vertical orientation: Engage the tilt actuator as though
tilting a load downwards (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.
Then attach the hoisting equipment hook to the lift spool.
WARNING: Hoisting equipment hook must be fitted with restraining latch to
prevent lift spool from slipping off under any circumstances.

Rev 14.0/4-18 7 PT410AC: #35140
Note: Some hoisting equipment hooks could interfere with an upright load that extends
beyond the lifter's pad frame. If the load would contact the hook during lifter operation, the
operator must prevent this by attaching a sling (or other rigging that does not interfere with
the load) between the hook and the lift spool.
WARNING: Any sling used must be rated to carry maximum load weight plus
lifter weight.
Note: The lifter is equipped with a movable control pendant, which can be placed in two
locations on the lifter or moved away from the lifter, to allow for different operator positions.
Position the control pendant on either the lift bar or the pad frame, depending on which
location is more convenient for the expected application of the lifter (see OPERATING
FEATURES).
Use the hoisting equipment to raise the lifter out of the shipping container. Be careful to
avoid damaging any vacuum pads. Remove the pad covers and save them for use whenever
the lifter is stored. Now the lifter is operational.
4) Perform Operational and Load Tests for the lifter as directed in MAINTENANCE: TESTING
SCHEDULE.

Rev 14.0/4-18 8 PT410AC: #35140
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:
• This lifter is designed to lift windshields, or similar loads, that vary in curvature.2Nevertheless,
some extreme curves may prevent the lifter from attaching to a load. Other curves may allow
the lifter to attach but require manual assistance from the operator, in order to establish a
seal between the vacuum pads and the load (see OPERATION: TO APPLY THE PADS TO A LOAD).
Because the lifter is designed to accommodate extreme variations in load shape, the lifter
places some stress on most windshields being lifted. The location and magnitude of the
stresses vary with each lift, according to the windshield curvature and the placement of the
lifter on the windshield.
• 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 semicurved and
relatively smooth contact surface. 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. 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.
2The minimum continuous radius at the attachment area of the load must be either 45" [115 cm] around an axis parallel to the
lifter's tilt axis or 95" [242 cm] around an axis perpendicular to the tilt axis (but not both). However, compound curves and
complex shapes may permit loads with tighter radii to be lifted.