Gorman-Rupp Pumps 83B52-GX390 1324570 and up - Manual (Page 24)

80 SERIES OM−04738
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, unless
otherwise specified, are keyed to the sectional
views (see Figure 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.
Before attempting to service the pump, shut down
the engine and disconnect the spark plug wire to
ensure that it will remain inoperative. Close all
valves in the suction and discharge lines.
For engine disassembly and repair, consult the lit-
erature supplied with the engine, or contact your
local engine representative.
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 (21) and drain the pump.
Clean and reinstall the drain plug.
To service the suction check valve, remove the suc-
tion piping. Remove the nuts (33) securing the suc-
tion flange (31) and the check valve assembly (24)
to the pump casing (1). Pull the check valve assem-
bly from the suction port.
Inspect the check valve parts for wear or damage.
If replacement is required, remove the hardware
(27 and 28) and separate the check valve gasket
(26) and weights (25 and 29).
If no further disassembly is required, see Suction
Check Valve Installation.
Pump Casing Removal
(Figure 2)
To service the impeller (2), wear plate assembly
(18) or seal assembly (3), disconnect the dis-
charge piping. See Figure 1 and remove the hard-
ware (17, 18 and 19) securing the pump casing (1)
to the base (3).
Remove the nuts (12) securing the pump casing
and gasket set (17) to the intermediate (16). Install
a standard 5/8−11 UNC lifting eye in the tapped
hole in the top of the pump casing. Be sure to