Gorman-Rupp Pumps SE1 1/2A3 115V 1P 1483930 and up - Manual (Page 29)

SE SERIES OM−06488
MAINTENANCE AND REPAIR PAGE E − 5
Select a suitable location, preferably indoors, to
perform the degree of maintenance required. If the
motor housing is to be opened, the work must be
done in a clean, well-equipped shop. All mainte-
nance functions must be done by qualified person-
nel.
Check the chart in TROUBLESHOOTING, Section
D of this manual, to determine the nature of the
pump problem. If the problem is mechanical in na-
ture, such as worn pump parts, seal replacement,
lubrication, etc., refer to PUMP END DISASSEM-
BLY for instructions.
If the problem is electrical, complete disassembly
may not be required. Refer to Electrical Testing in
TROUBLESHOOTING, Section D, and have a
qualified electrician check the control box, cable
and head. If the problem is determined to be in the
motor, proceed with PUMP END DISASSEMBLY,
followed by MOTOR DISASSEMBLY. Otherwise,
see Head And Power Cable Disassembly.
Carefully inspect any O-rings or gaskets before re-
moval and cleaning to determine if a proper seal
and compression existed prior to disassembly. If
sealing was faulty or questionable, the cause must
be determined and corrected before reassembly.
All gaskets and most O-rings must be replaced if
disturbed. Repair gaskets and O-rings are listed in
the Parts List.
PUMP END DISASSEMBLY
Strainer And Impeller Cover Removal
To remove the strainer assembly (65), disengage
the hardware (66 and 67) securing the strainer to
the impeller cover (61). To remove the impeller cov-
er, remove the hardware (59 and 60) securing it to
the pump casing (1). Remove the cover gasket
(58).
NOTE
Carefully inspect any O-rings or gaskets before re-
moval and cleaning to determine if a proper seal
and compression existed prior to removal. If seal-
ing was faulty or questionable, determine the cause
and correct it before reassembly. Replace any parts
as required.
If the impeller (2) is clogged, the debris can usually
be removed without further disassembly.
Draining Oil From Seal Cavity
The oil should be drained from the seal cavity be-
fore performing any further disassembly.
Let the pump cool before removing the
seal cavity drain/fill plug. Pressure built up
within a hot pump could cause the oil to
spray out when the plug is removed. Re-
move the plug slowly and permit pressure
to vent to atmosphere.
Lay the pump on its side with the drain/fill plug (56)
facing up. Clean any dirt from around the plug. Re-
move the plug and install a short nipple in the hole.
Tip the pump and drain the seal oil into a clean
container. Inspect the oil for water, dirt, or cloudy
condition which could indicate lower seal failure or
poor gasket seal. Remove the nipple and reinstall
the plug.
Positioning Pump For Disassembly
It is recommended that the pump be positioned
upside-down during disassembly. To hold the
pump in the inverted position, rest the pump se-
curely on blocks. Be careful not to damage the
head (27) and power cable (29) while in this posi-
tion.
Impeller Removal
Wedge a piece of wood between the vanes of the
impeller (2) and the pump casing to prevent shaft
rotation. Remove the hardware (62, 63 and 64) se-
curing the impeller.
Remove the wood and use a suitable puller to pull
the impeller off the shaft. Retain the impeller key
(54).
Seal Removal
The seal contains two rotating elements, two sta-
tionary elements and two bellows assemblies.