Gorman-Rupp Pumps 13E52-GX390 1368838 and up - Manual (Page 24)

10 SERIES OM−04734
MAINTENANCE & REPAIR PAGE E − 6
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 sectional views (see Figures 1 and 2) and the
accompanying parts lists.
This manual will alert personnel to known proce-
dures which require special attention, to those
which could damage equipment, and to those
which could be dangerous to personnel. However,
this manual cannot possibly anticipate and provide
detailed precautions for every situation that might
occur during maintenance of the unit. Therefore, it
is the responsibility of the owner/maintenance per-
sonnel to ensure that only safe, established main-
tenance procedures are used, and that any proce-
dures not addressed in this manual are performed
only after establishing that neither personal safety
nor pump integrity are compromised by such prac-
tices.
Most service functions, such as impeller and seal
replacement, may be performed by draining the
pump and removing the pump casing. The follow-
ing instructions assume complete disassembly is
required.
Before attempting to service the pump, shut down
the engine and disconnect the spark plug wire to
ensure that the pump will remain inoperative.
Close all valves in the suction and discharge lines.
Before attempting to open or service the
pump:
1. Familiarize yourself with this man-
ual.
2. Shut down the engine and discon-
nect the spark plug wire to ensure
that the pump will remain inopera-
tive.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates, or
plugs.
5. Close the suction and discharge
valves.
6. Vent the pump slowly and cau-
tiously.
7. Drain the pump.
Use lifting and moving equipment in
good repair and with adequate capacity
to prevent injuries to personnel or dam-
age to equipment. Suction and dis-
charge hoses and piping must be re-
moved from the pump before lifting.
Suction Check Valve Disassembly
(Figure 2)
Before attempting to service the pump, remove the
pump casing drain plug (18) and drain the pump.
Clean and reinstall the drain plug.
To service the suction check valve, remove the suc-
tion piping. Remove the nuts (28) securing the suc-
tion flange (35) to the pump casing (1). Pull the
check valve assembly (29) from the suction port.
Remove the hardware (31 and 32) securing the
check valve weights (30 and 33) to the check valve
gasket (34).
If no further disassembly is required, see Suction
Check Valve Installation.
Back Cover Removal
(Figure 2)
The wear plate assembly (15) can be serviced after
the back cover assembly (23) has been removed.
Remove the wing nuts and flat washers (21 and 22)
securing the back cover to the casing. Pull the
back cover and assembled wear plate from the