MR−05740
PA SERIES PUMPS
PAGE I − 1
INTRODUCTION
INTRODUCTION
Thank You
for purchasing a Gorman-Rupp Prime-
Aire
R
Series priming-assisted pump.
Read this
manual
carefully to learn how to safely maintain
and service your pump. Failure to do so could re-
sult in personal injury or damage to the pump.
A set of three manuals accompanies your pump.
The Installation/Operation Manual contains essen-
tial information on installing and operating the
pump, and on making electrical connections. The
Parts List Manual provides performance curve(s),
a pump model cross-section drawing, and parts
list for your pump.
This Maintenance and Repair Manual provides
troubleshooting instructions required to properly
diagnose operational problems. Maintenance in-
structions within this manual are limited to the
pump hydraulic and drive components only. For
maintenance and repair of the engine or air com-
pressor, consult the separate literature provided by
the manufacturers.
This pump is a PA Series
R
, priming-assisted cen-
trifugal model. The unit is designed for handling
non-volatile, non-flammable liquids containing
specified entrained solids. For specific service,
contact your Gorman-Rupp distributor or the Gor-
man-Rupp Company.
As described on the following page, this manual
will alert personnel to known procedures which re-
quire special attention, to those which could dam-
age equipment, and to those which could be dan-
gerous to personnel. However, this manual cannot
possibly anticipate and provide detailed precau-
tions for every situation that might occur during
maintenance of the unit. Therefore, it is the respon-
sibility of the owner/maintenance personnel to en-
sure that
only
safe, established maintenance pro-
cedures are used, and that any procedures not ad-
dressed in this manual are performed
only
after es-
tablishing that neither personal safety nor pump in-
tegrity are compromised by such practices.
If there are any questions regarding the pump
which are not covered in this manual or in other lit-
erature accompanying the unit, please contact
your Gorman-Rupp distributor or the Gorman-
Rupp Company:
The Gorman-Rupp Company
P.O. Box 1217
Mansfield, Ohio 44901−1217
Phone: (419) 755−1011
or:
Gorman-Rupp of Canada Limited
70 Burwell Road
St. Thomas, Ontario N5P 3R7
Phone: (519) 631−2870
CONTENTS
SAFETY − SECTION A
TROUBLESHOOTING − SECTION B
PUMP MAINTENANCE AND REPAIR − SECTION C
DRAWINGS AND IDENTIFICATION LISTS
PAGES C − 2 THRU C−11
. . . . . . . . . . . . . . . . . . . . . . . . . .
PUMP AND SEAL DISASSEMBLY AND REASSEMBLY
PAGE C − 12
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Priming Chamber Removal And Disassembly
PAGE C − 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Discharge Check Valve Removal and Disassembly
PAGE C − 13
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Back Cover Plate and Wear Ring Removal
PAGE C − 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Separating Pump End From Power Source
PAGE C − 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Draining Oil From Seal Cavity
PAGE C − 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loosening Impeller
PAGE C − 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Casing Removal
PAGE C − 14
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Impeller Removal
PAGE C − 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Seal Removal
PAGE C − 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Removal and Disassembly
PAGE C − 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shaft and Bearing Reassembly and Installation
PAGE C − 16
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
