GORMAN-RUPP PA4A60-4024T-ESP, Installation, Operation And Maintenance Manual

Page: 89 / 110

OM-06301
PA SERIES
MAINTENANCE & REPAIR PAGE E - 23
PUMP AND SEAL DISASSEMBLY
AND REASSEMBLY
Review all SAFETY information in Section A.
Follow the instructions on all tags, label and de­
cals attached to the pump.
This pump requires little service due to its rugged,
minimum‐maintenance design. However, if it be­
comes necessary to inspect or replace the wearing
parts, follow these instructions which are keyed to
the illustrations (see Figures 1 through 12) and the
corresponding Parts Lists. Maintenance and repair
instructions for the engine is covered separately in
specific literature available from the manufacturer.
Some pump service functions may be performed
without separating the pump end assembly from
the engine. However, the priming chamber and
discharge check valve assembly must be removed
to service most pump components. The following
instructions assume complete disassembly of the
pump is required.
Before attempting to service the pump, shut down
the engine and take precautions to ensure that it
will remain inoperative. Close all valves in the suc­
tion and discharge lines and drain the pump cas­
ing by removing the casing drain plug (11, Figure
4). Clean and reinstall the drain plug.
This manual will alert personnel to
known procedures which require spe­
cial attention, to those which could
damage equipment, and to those which
could be dangerous to personnel.
How­
ever, this manual cannot possibly antici­
pate and provide detailed instructions
and precautions for every situation that
might occur during maintenance of the
unit. Therefore, it is the responsibility of
the owner/maintenance personnel to
ensure that only safe, established main­
tenance procedures are used, and that
any procedures not addressed in this
manual are performed only after estab­
lishing that neither personal safety nor
pump integrity are compromised by
such practices.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man­
ual.
2. Shut down the engine and discon­
nect the positive battery cable to
ensure that the pump will remain
inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature and make
sure it is cool before opening any
covers, plates, gauges, or plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau­
tiously.
7. Drain the pump.
Death or serious personal injury and
damage to the pump or components
can occur if proper lifting procedures
are not observed. Make certain that
hoists, chains, slings or cables are in
good working condition and of suffi­
cient capacity and that they are posi­
tioned so that loads will be balanced
and the pump or components will not be
damaged when lifting. Suction and dis­
charge hoses and piping must be re­
moved from the pump before lifting. Lift
the pump or component only as high as
necessary and keep personnel away
from suspended objects.
Use only replacement parts provided or
approved by Gorman‐Rupp. Use of non‐