Graco 557752 User manual

313229D
EN
Instructions
Field Sensitive
Magnetic Proximity
Cycle Switch
For use with MX, MXP & MGO Valve Sections. DC-powered 4-pin FSM proximity switches
are not recommended for use on series divider valves operating at less than 20 cycles per
minute. For professional use only.
Part Nos. 557752, 558938
8000 psi (55.2 MPa, 552 bar) Maximum Working Pressure
Important Safety Instructions
Read all warnings and instructions in
this manual before using the equipment.
Save these instructions.

Warnings
2 313229D
Warnings
The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The
exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks.
When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings.
Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this
manual where applicable.
WARNING
ELECTRIC SHOCK HAZARD
This equipment must be grounded. Improper grounding, setup, or usage of the system can cause
electric shock.
• Turn off and disconnect power at main switch before disconnecting any cables and before servicing
or installing equipment.
• Connect only to grounded power source.
• All electrical wiring must be done by a qualified electrician and comply with all local codes and
regulations.

Warnings
313229D 3
EQUIPMENT MISUSE HAZARD
Misuse can cause death or serious injury.
• Do not operate the unit when fatigued or under the influence of drugs or alcohol.
• Do not exceed the maximum working pressure or temperature rating of the lowest rated system
component. See Technical Specifications in all equipment manuals.
• Use fluids and solvents that are compatible with equipment wetted parts. See Technical
Specifications in all equipment manuals. Read fluid and solvent manufacturer’s warnings. For
complete information about your material, request Safety Data Sheets (SDSs) from distributor or
retailer.
• Check equipment daily. Repair or replace worn or damaged parts immediately with genuine
manufacturer’s replacement parts only.
• Do not alter or modify equipment. Alterations or modifications may void agency approvals and
create safety hazards.
• Make sure all equipment is rated and approved for the environment in which you are using it.
• Use equipment only for its intended purpose. Call your distributor for information.
• Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.
• Do not kink or over bend hoses or use hoses to pull equipment.
• Keep children and animals away from work area.
• Comply with all applicable safety regulations.
SKIN INJECTION HAZARD
High-pressure fluid from dispensing device, hose leaks, or ruptured components will pierce skin. This
may look like just a cut, but it is a serious injury that can result in amputation. Get immediate surgical
treatment.
• Do not point dispensing device at anyone or at any part of the body.
• Do not put your hand over the fluid outlet.
• Do not stop or deflect leaks with your hand, body, glove, or rag.
• Follow the Pressure Relief Procedure in the pump instruction manual when you stop dispensing and
before cleaning, checking, or servicing equipment.
• Tighten all fluid connections before operating the equipment.
• Check hoses and couplings daily. Replace worn or damaged parts immediately.
WARNING

Valve Assembly Installation
4 313229D
Valve Assembly Installation
Grounding
Assemblies not originally
equipped with cycle pin
indicator pin/switch
1. Determine which valve section and side is the most
convenient location for the switch.
2. Disconnect the electrical system.
3. Relieve pressure. See Pressure Relief Procedure in
the pump instruction manual included with your
operating system.
4. Remove piston plug and discard.
5. Install the appropriate proximity switch into the pis-
ton chamber using the supplied seal/gasket. For
MS and MH valve sections, torque to 6-8 ft-lb (8 -
10.8 N•m) for o-ring seal; 10 ft-lb (13.6 N•m) for
gasket seals. For MX and MGO torque adapter to
25-30 ft-lb (33.9 - 40.7 N•m) and the switch to 6-8
ft-lb (8 - 10.8 N•m).
6. Connect the electrical system.
Assemblies equipped with cycle
pin indicator/electrical
micro-switch
(Two options: Method A or Method B)
Method A: Installation in any piston
chamber not occupied by the cycle pin
indicator
1. Determine which valve section and side is the most
convenient location for the switch.
2. Disconnect the electrical system.
3. Relieve pressure. See Pressure Relief Procedure in
the pump instruction manual included with your
operating system.
4. Remove the piston plug. (Do not discard plug if
removing the cycle indicator pin. It is reinstalled in
step 6e.)
5. Install the appropriate proximity switch into the
piston chamber using the supplied seal/gasket. For
MS and MH valve sections, torque to 6-8 ft-lb (8 -
10.8 N•m) (for o-ring seal; 10 ft-lb (13.6 N•m) for
gasket seals. For MX and MGO torque adapter to
25-30 ft-lb (33.9 - 40.7 N•m) and the switch to 6-8
ft-lb (8 - 10.8 N•m).
6. Either leave the cycle indicator pin installed for
visual indication of cycle or remove as follows:
a. Unscrew cycle indicator body from valve and
discard.
b. Grasp indicator pin and pull pin/piston assem-
bly out of the feeder.
The equipment must be grounded to reduce the risk
of static and electric shock by providing an escape
wire for the electric current due to static build up or in
the event of a short circuit.
NOTICE
Do not over torque. Excessive torque will cause
switch failure.
NOTICE
Do not reuse gasket. If switch is removed for any rea-
son, replace with new gasket.
NOTICE
Do not over torque. Excessive torque will cause
switch failure.
NOTICE
Do not reuse gasket. If switch is removed for any rea-
son, replace with new gasket.

Valve Assembly Installation
313229D 5
c. Remove the indicator pin by sliding it through
the slot on models equipped with this arrange-
ment (MS and late model MX type) or drive out
cross pin using a brass rod (old MX type).
d. Discard the pin.
e. Carefully insert piston back into the bore.
f. Plug the hole with piston plug removed in step
4. Torque to 12 ft-lb (16.3 N•m) for MSP, 35
ft-lb (47.5 N•m) for MX.
7. Make electrical connection.
Method B: Replacing existing cycle
indicator pin/switch
1. Determine which valve section and side is the most
convenient location for the switch.
2. Relieve pressure. See Pressure Relief Procedure in
the pump instruction manual included with your
operating system.
3. Remove the existing cycle indicator pin/switch.
4. Reverse piston so the proximity switch does not
sense slot end of piston.
5. Install the appropriate proximity switch into the pis-
ton chamber using the supplied seal/gasket. For
MS and MH valve sections, torque to 6-8 ft-lb (8 -
10.8 N•m) for o-ring seal; 10 ft-lb (13.6 N•m) for
gasket seals. For MX and MGO torque adapter to
25-30 ft-lb (33.9 - 40.7 N•m) and the switch to 6-8
ft-lb (8 - 10.8 N•m).
Wiring Instructions
In order to make proper electrical connections,
connector cable must be used. The following connector
cables are available:
4-Pin Cable Options for DC Powered
Applications with LED Power/Operation
Lights
5-Pin Cable Options for AC Powered
Applications (No Operational Indicators in
Cables)
NOTICE
Piston is a ground part and all caution must be taken
to avoid nicking, scratching or contaminating this
part or the feeder piston bore.
NOTICE
Do not over torque. Excessive torque will cause
switch failure.
The equipment must be grounded to reduce the risk
of static and electric shock by providing an escape
wire for the electric current due to static build up or in
the event of a short circuit.
Connector Polarity
Cable
Length Part No.
Straight NPN 12 ft. 558968
Straight PNP 12 ft. 558025
90° PNP 12 ft. 558026
Connector
Cable
Length Part No.
Straight 6 ft. 558023
Straight 12 ft. 558024
90° 6 ft. 558965

Valve Assembly Installation
6 313229D
DC Proximity Switch Cables - Connecting
Cable Wiring Code
*With LED Operational Indicators
Connecting Cable Wiring Code
Cable Wires
Color Code
DC Cable Pin Assignments
PNP Cable* NPN Cable*
Black Pin A - N.O.
Brown Pin B - Power
Blue Pin C - Common
White Pin D - Ground
A
B
C
D
USA
Color Code
AC Cable
Pin Assignments
White Pin A - N.O.
Red Pin B - Not Used
Green Pin C - Ground
Orange Pin D - Not Used
Black Pin E - Common
A
B
C
D
E

Recycling and Disposal
313229D 7
Recycling and Disposal
End of Product Life
At the end of the product’s useful life, dismantle and
recycle it in a responsible manner.
• Relieve pressure using the Pressure Relief
Procedure in the pump instruction manual included
with your operating system.
• Drain and dispose of fluids according to applicable
regulations. Refer to the material manufacturer’s
Safety Data Sheet.
• Deliver remaining product to a recycling facility.

Technical Specifications
8 313229D
Technical Specifications
Series A
Switch Current Rating Temperature Range Approvals
557752 0.1A @ 28 VDC (UL)
-22° - 250° F (-30° - 121° C) Ordinary Location
558938 2A @ 120/240 VAC
Series B
Switch Current Rating Temperature Range Approvals
557752 2A @ 240 VAC
4A @ 110 VAC
3A @ 24 VDC
-40° F - 212° F (-40° - 100 ° C) Ordinary Location
558938
Other Specifications
Switch Type Normally open contacts
Maximum Cycle Rate 60 cycles/min.
Maximum Operating Pressure 8000 psi (55.2 MPa, 552 bar)
Material Switch - Stainless steel
Adapter - Nickel plated steel
O-Ring - Buna N 90 durometer

California Proposition 65
313229D 9
California Proposition 65
CALIFORNIA RESIDENTS
WARNING: Cancer and reproductive harm – www.P65warnings.ca.gov.

All written and visual data contained in this document reflects the latest product information available at the time of publication.
Graco reserves the right to make changes at any time without notice.
Original instructions. This manual contains English. MM 313229
Graco Headquarters: Minneapolis
International Offices: Belgium, China, Japan, Korea
GRACO INC. AND SUBSIDIARIES • P.O. BOX 1441 • MINNEAPOLIS MN 55440-1441 • USA
Copyright 2007, Graco Inc. All Graco manufacturing locations are registered to ISO 9001.
www.graco.com
Revision D, July 2022
Graco Standard Warranty
Graco warrants all equipment referenced in this document which is manufactured by Graco and bearing its name to be free from defects in
material and workmanship on the date of sale to the original purchaser for use. With the exception of any special, extended, or limited warranty
published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by
Graco to be defective. This warranty applies only when the equipment is installed, operated and maintained in accordance with Graco’s written
recommendations.
This warranty does not cover, and Graco shall not be liable for general wear and tear, or any malfunction, damage or wear caused by faulty
installation, misapplication, abrasion, corrosion, inadequate or improper maintenance, negligence, accident, tampering, or substitution of
non-Graco component parts. Nor shall Graco be liable for malfunction, damage or wear caused by the incompatibility of Graco equipment with
structures, accessories, equipment or materials not supplied by Graco, or the improper design, manufacture, installation, operation or
maintenance of structures, accessories, equipment or materials not supplied by Graco.
This warranty is conditioned upon the prepaid return of the equipment claimed to be defective to an authorized Graco distributor for verification
of the claimed defect. If the claimed defect is verified, Graco will repair or replace free of charge any defective parts. The equipment will be
returned to the original purchaser transportation prepaid. If inspection of the equipment does not disclose any defect in material or
workmanship, repairs will be made at a reasonable charge, which charges may include the costs of parts, labor, and transportation.
THIS WARRANTY IS EXCLUSIVE, AND IS IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT
LIMITED TO WARRANTY OF MERCHANTABILITY OR WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE.
Graco’s sole obligation and buyer’s sole remedy for any breach of warranty shall be as set forth above. The buyer agrees that no other remedy
(including, but not limited to, incidental or consequential damages for lost profits, lost sales, injury to person or property, or any other incidental
or consequential loss) shall be available. Any action for breach of warranty must be brought within two (2) years of the date of sale.
GRACO MAKES NO WARRANTY, AND DISCLAIMS ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, IN CONNECTION WITH ACCESSORIES, EQUIPMENT, MATERIALS OR COMPONENTS SOLD BUT NOT
MANUFACTURED BY GRACO. These items sold, but not manufactured by Graco (such as electric motors, switches, hose, etc.), are subject to
the warranty, if any, of their manufacturer. Graco will provide purchaser with reasonable assistance in making any claim for breach of these
warranties.
In no event will Graco be liable for indirect, incidental, special or consequential damages resulting from Graco supplying equipment hereunder,
or the furnishing, performance, or use of any products or other goods sold hereto, whether due to a breach of contract, breach of warranty, the
negligence of Graco, or otherwise.
FOR GRACO CANADA CUSTOMERS
The Parties acknowledge that they have required that the present document, as well as all documents, notices and legal proceedings entered
into, given or instituted pursuant hereto or relating directly or indirectly hereto, be drawn up in English. Les parties reconnaissent avoir convenu
que la rédaction du présente document sera en Anglais, ainsi que tous documents, avis et procédures judiciaires exécutés, donnés ou intentés,
à la suite de ou en rapport, directement ou indirectement, avec les procédures concernées.
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For patent information, see www.graco.com/patents.
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Phone: [phone] or Toll Free: 1-800-533-9655, Fax: [phone]