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SECTION 4
MAINTENANCE
4.1 SPARE PARTS
To avoid excessive downtime in the event of a
parts malfunction, the spare parts shown below
should be maintained in your stores to support
each mRoy pump. For your convenience, these
parts can be purchased either separately or pack-
aged in the form of Routine Preventive Mainte-
nance (RPM) Kits. RPM kit numbers are listed in
Section 1.
Double quantities required for duplex pumps. Two
diaphragms are required for double diaphragm
simplex liquid ends; four are required for double
diaphragm duplex liquid ends.
4.2 RPM KIT COMPONENTS (WITHOUT LEAK
DETECTION)
mRoy XT Metallic Liquid End
1 Suction 1/4” Single Ball Check Valve Assy
1 Discharge Single Ball Check Valve Assy
1 Diaphragm GYL, 2.84 Dia
1 Back Up Ring
1 O-Ring
1 O-Ring
1 O-Ring
1 O-Ring
mRoy XW Metallic Liquid End
1 Suction Check Valve, DBL Ball
1 Discharge Check Valve, DBL, Ball
1 Diaphragm
2 Back Up Ring
1 Back Up Ring
2 O-Ring
1 O-Ring
1 O-Ring
1 O-Ring
Parts Orders Must Include The Following Infor-
mation:
1. Quantity required (in this manual)
2. Part number (in this manual)
3. Part description (in this manual)
4. Pump model no. (on pump nameplate)
5. Pump product code (on pump
nameplate)
6. Pump serial no. (on pump nameplate)
Always include the serial number, product code,
and model number in all correspondence regarding
the unit.
4.3 RETURNING UNITS TO THE FACTORY
Pumps will not be accepted for repair without a
Return Material Authorization Form, available from
the Aftermarket Department. Process liquid must
be flushed from the pump liquid end, and oil should
be drained from the pump housing before the
pump is shipped. Label the unit clearly to indicate
the liquid being pumped.
NOTE: Federal law prohibits handling of
equipment that is not accompanied by an
OSHA Material Safety Data Sheet (MSDS). A
completed MSDS must be packed in the ship-
ping crate with any pump returned to the fac-
tory. These safety precautions will aid the
troubleshooting and repair procedure and pre-
clude serious injury to repair personnel from
hazardous residue in the pump liquid end.
All inquiries or parts orders should be addressed to
your local Milton Roy representative or sent to:
Parts Department
Milton Roy Company Flow Control Division
201 Ivyland Road
Ivyland, PA 18974-0577
Phone: (215) 441-0800
FAX (215) 441-0735
4.4 ROUTINE MAINTNANCE
The mRoy XT / XW pump is designed for reliable
service with a minimum amount of maintenance
required. However, a yearly tune-up is recom-
mended, during which the check valves and dia-
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