Gorman-Rupp Pumps SE2D3 115V 1P 1483930 and up - Manual (Page 27)

OM-06494 SE SERIES
MAINTENANCE & REPAIR PAGE E - 5
nance functions must be done by qualified person­
nel.
Check the chart in TROUBLESHOOTING, Section
D, to determine the nature of the pump problem. If
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 (88). To remove the impeller cover, remove
the hardware (86 and 87) 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 (83)
facing up. Clean any dirt from around the plug. Re­
move 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 indicate 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 (49) and power cable (46) while in this posi­
tion.
Impeller Removal
Wedge a piece of wood between the vanes of the
impeller (2) and the pump casing (1) to prevent
shaft rotation. Remove the impeller hardware (89,
90 and 91).
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 (84 and 85) securing the
pump casing to the seal chamber (9) and remove
the casing.
Remove the hardware (10 and 11) securing the
seal chamber to the lower mounting plate (81).
Carefully slide the seal chamber, dust seal (93) and
shaft sleeve (94) off the shaft. Press the shaft
sleeve out of the seal chamber from the back side.
NOTE
The shaft sleeve (94) may not come free of the shaft