Gorman-Rupp Pumps SE1 1/2B3-E.33 12V 1483930 and up - Manual (Page 21)

SE SERIES OM−06490
MAINTENANCE & REPAIR PAGE E − 7
Slide the seal spring over the shaft and bellows re-
tainer, and install the spring centering washer. See
Figure 2 for the proper order of seal assembly.
Impeller Installation
Inspect the impeller (8) for cracks, broken vanes,
or wear from erosion, and replace it if damaged.
Clean the threads on the rotor shaft.
Install the same thickness of impeller adjusting
shims (7) as previously removed. Position the im-
peller against the shims and seal spring. Carefully
compress the spring with the impeller until the im-
peller can be started on the shaft threads. Screw
the impeller onto the shaft until it is fully seated.
Wedge a piece of wood between the vanes of the
impeller and the inside of the pump casing.
Insert a large flat-bladed screwdriver into the slot in
the end of the shaft. Turn the shaft in a counter-
clockwise direction to secure the impeller.
Remove the block of wood, and turn the impeller to
check for free rotation. If the impeller scrapes or
binds against the pump casing, remove the impel-
ler and install additional shims as required. Rein-
stall the impeller and re-check the clearance.
Check front impeller clearance after installing the
suction cover (10).
Strainer Installation
Inspect the strainer screen (1) and suction cover
(10) for cracks, distortion or erosion, and replace
any defective parts.
Install the same thickness of casing gaskets (9)
and position the suction cover against the gaskets.
Insert a flat-bladed screwdriver in the slot in the end
of the shaft, and turn the shaft to check for scraping
or binding. If scraping or binding occurs, install
additional gaskets.
Install the suction cover, strainer screen and strain-
er plate (12) and secure the parts with the hard-
ware (13 and 14).
MOTOR DISASSEMBLY
Disassembly of the motor is rarely required except
to replace electrical components or the motor
brushes. Do not disassemble the motor unless it is
necessary and a clean, well-equipped shop is
available.
NOTE
It is recommended that a pump with a defective mo-
tor be returned to Gorman-Rupp, or to one of the
Gorman-Rupp authorized Submersible Repair
Centers.
Obtain the services of a qualified elec-
trician to troubleshoot, test and/or ser-
vice the electrical components of this
pump.
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.
Replace any parts as required.
Cable Assembly and Motor Cover Removal
Total removal of the motor assembly (15) is not al-
ways required. Disassemble and replace only the
parts proven defective by inspection or testing.
See Electrical Testing in TROUBLESHOOTING.
The electrical components may be serviced with-
out disassembling the motor housing or pump
end.
Secure the pump in an upright position. To remove
the motor cover, disengage the hardware (27 and
28). Use a screwdriver to carefully pry the motor
cover out of the casing tube.
Carefully raise the motor cover until the electrical
components are accessible. To remove the motor
cover, unscrew the nut securing the red (positive)
power cable lead to the shorter terminal on the cir-
cuit breaker (31).