WPG 35275 User manual

Rev 3.1/6-22 AC: #352751
INTENDED FOR USE BY SKILLED
TECHNICAL PROFESSIONALS • READ
AND UNDERSTAND BEFORE SERVICING
SERVICE
MANUAL 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
AC-VOLTAGE POWER SYSTEM
Stock number: 35275
KEEP FOR FUTURE REFERENCE

AC: #35275 Rev 3.1/6-222

Rev 3.1/6-22 AC: #352751
BEFORE SERVICING LIFTER .....................................................................2
SERVICE SCHEDULE .......................................................................................2
SERVICE FEATURES .................................................................................3
SERVICE PROCEDURES............................................................................4
AIR FILTER MAINTENANCE – 1 OZ BOWL SIZE ...................................................4
Filter Service Procedure......................................................................................................4
AIR FILTER MAINTENANCE −4.4 OZ BOWL SIZE ................................................6
Filter Service Procedure......................................................................................................6
VACUUM PUMP MAINTENANCE −MODEL 0523...............................................8
Disassembly/Reassembly Procedure ..................................................................................8
VACUUM PUMP MAINTENANCE −MODEL 3032 OR 2032.................................9
VACUUM PUMP MAINTENANCE −MODEL MP27 ...........................................11
Removing the Head and Valve Plate .................................................................................12
Replacing the Intake Valve and Sleeve O-Ring ..................................................................12
Replacing the Exhaust Valve and Head O-Ring .................................................................12
Disassembling the Piston Assembly..................................................................................12
Replacing the Sleeve and Cup...........................................................................................13
Installing the Valve Plate and Head...................................................................................13
VACUUM SWITCH ADJUSTMENT....................................................................14
LINEAR TILT ACTUATOR ADJUSTMENT ............................................................15
REPLACEMENT PARTS...........................................................................16
TABLE OF CONTENTS

AC: #35275 Rev 3.1/6-222
BEFORE SERVICING LIFTER
Disconnect power source
before servicing lifter.
1A 1B
Disconnect the
electrical
connectors (figs.
1A-B).
Service personnel must read and understand the lifter’s OPERATING INSTRUCTIONS ‒especially
“INSPECTIONS AND TESTS” and “MAINTENANCE” sections ‒before servicing the vacuum lifter.
Many of the following discussions assume knowledge of the OPERATING INSTRUCTIONS.
Note: The relevant wiring diagrams are shown in the lifter’s OPERATING INSTRUCTIONS, for
reference when servicing or troubleshooting the lifter.
SERVICE SCHEDULE
Service must be performed whenever a deficiency is indicated by routine inspections or tests.
Follow the “INSPECTIONS AND TESTS” section of the OPERATING INSTRUCTIONS. Any service
warranted must be performed before resuming normal operation of the lifter.

Rev 3.1/6-22 AC: #352753
Features shown here are underlined on their first appearance in each section to follow.
1 LIFT POINT 2 VACUUM LIFT LIGHT 3 POWERSWITCH
4PENDANTBASKET 5 VACUUM PAD 6 PADFRAME
7 ROTATION RELEASE LEVER 8 VACUUM RELEASE BUTTON1
1...... Some lifters have a lever-style Vacuum Control Valve instead of a Vacuum Release Button.
9 TILT TOGGLE SWITCH
10 MOVABLE CONTROL PENDANT 11 AIR FILTER 12 Enclosure w/ VACUUM SWITCH
13 VACUUM GAUGE 14 LIFT BAR 15 VACUUM RESERVE TANK
16 TILT ACTUATOR 17 VACUUM PUMP 18 CONTROL HANDLE
Note: A standard MRPT89AC is shown.1
1..... Some components may not be relevant or they may have a different location, depending on the lifter in question.
SERVICE FEATURES

AC: #35275 Rev 3.1/6-224
SERVICE PROCEDURES
AIR FILTER MAINTENANCE – 1 OZ BOWL SIZE
Inspect each air filter regularly, and service
when necessary.
1A
A
B
Immediately remove liquid or other contaminates found in
the filter bowl (A in fig. 1A), to prevent contact with the
filter element (C in fig. 2A).
Never use bowl drain (circled in fig. 1A) to
remove liquid, because this could cause air leak.
Replace the filter element whenever:
• It has an overall dirty appearance.
• There is a noticeable increase in the time required to attain full vacuum.
Filter Service Procedure
1) Unscrew the bowl (item A in fig. 1A) from the body (item B in fig. 1A) of the air filter.
Note: To protect air-line fittings from damage, hold the body while turning the bowl.
2)
2A
C
Determine whether the filter element (item C in fig. 2A) needs
to be replaced (see above).
• If so, proceed to step 3.
• If not, remove any liquid or contaminates from the bowl;
clean the old bowl seal (see step 4 on next page) with
mild soap and water; and skip to step 6.
3)
3A 3B
D
Carefully
unscrew the
element holder
(item D in fig.
3A) and remove
all internal parts
(fig. 3B).

Rev 3.1/6-22 AC: #352755
4)
4A
Identify the parts in the Filter
Element Kit (#16134),
including the element (item A
in fig. 4A), element holder (B),
lubricant (C), deflector (D),
element gaskets (E), bowl seal
(F). Then dispose of the
corresponding old parts.
5)
5A
Place the new element gaskets, element and deflector on
the element holder as shown in fig. 5A. Then screw the
assembly back into the filter body.
Note: Tighten gently ‒finger-tight.
6) Clean the bowl, using mild soap and water only.
Caution: Do not use any other cleaning agents.
7) Lubricate the new or cleaned bowl seal using a mineral-
based oil or grease, such as that provided in the filter
element kit.
Caution: Do not use synthetic oils, such as esters, and do
not use silicones.
Then place the bowl seal around the rim of the bowl.
8) Screw the bowl back into the body. Hand-tighten only.
Caution: Do not contaminate the filter element with lubricant from the bowl seal.
9) Perform the “Vacuum Test” to be certain the air filter does not leak (see “INSPECTIONS
AND TESTS: TESTING” in the lifter's OPERATING INSTRUCTIONS).
Note: Repeat this procedure for any other filter of the same type.
SERVICE PROCEDURES

AC: #35275 Rev 3.1/6-226
SERVICE PROCEDURES
AIR FILTER MAINTENANCE −4.4 OZ BOWL SIZE
Inspect each air filter regularly, and
service when necessary.
1A
Immediately remove liquid
found in the filter bowl, to
prevent contact with the filter
element.
Never use bowl
drain to remove
liquid, because this could
cause air leak.
Replace the element
whenever:
• It has an overall dirty
appearance.
• There is a noticeable
increase in the time required to attain full vacuum.
Note: The Filter Element Kit (#16132) includes an element (item 3 in fig. 1A), a bowl seal (item 5)
and lubricant (not shown).
Filter Service Procedure
1) Unscrew the threaded collar (item 8 in fig. 1A) from the body (item 1) of the air filter.
Note: To protect air-line fittings from damage, hold the body while turning the collar.
2) Remove the bowl guard (item 7) and the bowl (item 6).
3) Determine whether the filter element (item 3) needs to be replaced (see above).
•If so, proceed to step 4.
•If not, remove any liquid or contaminates from the bowl; clean the old bowl seal
(item 5) with mild soap and water; and skip to step 8.
4) Unscrew the baffle (item 4), and remove the element and deflector (item 2).
5) Discard the old element and bowl seal (item 5).

Rev 3.1/6-22 AC: #352757
6) Clean the bowl and all remaining internal parts, using mild soap and water only.
Caution: Do not use any other cleaning agents.
7) Install the deflector and a new filter element. Then screw the baffle back on to hold the
element in place.
Note: Tighten gently ‒finger-tight.
8) Lubricate the new or cleaned bowl seal, using a mineral-based oil or grease, such as that
provided in the filter element kit.
Caution: Do not use synthetic oils, such as esters, and do not use silicones.
Then place the bowl seal around the rim of the bowl.
9) Install the bowl back onto the body.
Caution: Do not contaminate the filter element with lubricant from the bowl seal.
10) Install the bowl guard and the collar.
Note: Tighten the collar with 28-32 in-lbs [316-362 N-cm] of torque.
11) Perform the “Vacuum Test” to be certain the air filter does not leak (see “INSPECTIONS
AND TESTS: TESTING” in the lifter's OPERATING INSTRUCTIONS).
Note: Repeat this procedure for any other filter of the same type.
SERVICE PROCEDURES

AC: #35275 Rev 3.1/6-228
V ACUUM P UMP M AINTENANCE −M ODEL 0523
Before proceeding with any maintenance, disconnect
power source and allow pump to cool.
Disassembly/Reassembly Procedure
(includes replacing air filters, vanes and gasket; see “REPLACEMENT PARTS”).
1)
1 SHROUD 8 AIR FILTER (2x / #66175)
2 VANES (4x / #66175) 9 O-RING (2x)
3 ENDPLATE 10 END CAP (2x)
4 BOLTS FOR ENDPLATE (6x)
5 GASKET (#66175AB)
6 SOUND CHAMBER
7 BOLTS FOR SOUND
CHAMBER (5x)
Remove the end
caps, O-rings and air
filters from the
sound chamber of
the vacuum pump.
2) Remove the five
bolts and remove
the sound chamber.
Note: If any liquid is
discovered in the
sound chamber,
thoroughly dry all
interior surfaces of the pump prior to reassembly.
3) Remove the six bolts from the endplate, and separate the endplate from the rotor
housing. The shroud surrounding the rotor housing will loosen as well.
4) Note the orientation of the bevel on the vanes for step 5. Then remove the vanes by
sliding them out the end of the rotor. If needed, rotate the rotor by hand to position the
vanes for easier access.
5) Make sure that the rotor and housing are clean and free of debris. Orient the new vanes
like the old ones by matching the bevel. Then insert the new vanes by sliding them into
the empty slots in the rotor.
6) Reinstall the endplate and secureit with the six bolts previously removed.
7) Remove the gasket, and make sure that the contact surfaces between the endplate and
sound chamber are clean. Install a new gasket and reinstall the sound chamber. Then
secure the sound chamber with the five bolts previously removed.
8) Replace the air filters. Then reinstall the O-rings and end caps.
SERVICE PROCEDURES