Gorman-Rupp Pumps SE2D3A 115V 1P 1483930 and up - Manual (Page 26)

OM-06495 SE SERIES
MAINTENANCE & REPAIR PAGE E - 5
the problem is mechanical in nature, such as worn
pump parts, seal replacement, lubrication, etc., re­
fer to PUMP END DISASSEMBLY for instructions.
If the problem is electrical, complete disassembly
may not be required. Refer to Electrical Testing in
TROUBLESHOOTING, Section B, 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 (see the Parts List).
Strainer And Impeller Cover Removal
To remove the strainer (4), disengage the hard­
ware (5 and 6) securing the strainer to the impeller
cover (105). To remove the impeller cover, remove
the hardware (103 and 104) securing it to the pump
casing (1). Remove the cover gasket (7).
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
(100) facing up. Clean any dirt from around the
plug. Remove the plug. Tip the pump and drain the
seal oil into a clean container. Inspect the oil for
water, dirt, or cloudy condition which could indi­
cate lower seal failure or poor gasket seal.
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 (58) and power cable (55) 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 impeller hardware (106, 107
and 108).
Remove the wood block and use a suitable puller
to pull the impeller off the shaft. Retain the impeller
key (8).
Seal Removal
(Figures E‐1 and E‐2)
Remove the hardware (101 and 102) securing the
pump casing (1) to the seal chamber (9) and re­
move the casing.
Remove the hardware (10 and 11) securing the
seal chamber to the lower mounting plate (98).
Carefully slide the seal chamber, dust seal (110)
and shaft sleeve (111) off the shaft. Press the shaft
sleeve out of the seal chamber from the back side.
NOTE
The shaft sleeve (111) may not come free of the
shaft when the seal chamber is removed. It may be
necessary to heat the sleeve and tap it off the shaft.
Remove the seal chamber O‐ring (13).