Gorman-Rupp Pumps SE2D3A 115V 1P 1483930 and up - Manual (Page 29)

OM-06495 SE SERIES
MAINTENANCE & REPAIR PAGE E - 8
Use your thumbs to press the assembly into the
bore. Apply equal pressure on opposite sides until
the seat contacts the bore shoulder. Remove the
tissue and inspect the seal face to ensure that it is
clean and dry. If cleaning is necessary, use clean
tissue to wipe lightly in a concentric pattern. After
cleaning, apply a drop light oil to the seal face.
Unpack the seal spring retaining ring, seal spring,
bellows and rotating element. Be certain the seal
face of the rotating element is free of grit or surface
damage. Make sure the drive grooves of the rotat­
ing element fully engage the drive lugs of the bel­
lows retainer.
Install the seal retaining ring in the groove in the
shaft. Position the seal spring retaining ring over
the retaining ring on the rotor shaft. Slide the seal
spring over the shaft and the retaining ring.
Apply a light coating of oil to I.D. of the bellows.
Slide the bellows and assembled rotating element
on the shaft so that the bellows cage seats in the
seal spring. The seal spring cannot be com­
pressed and held in place until the seal chamber is
installed.
Inspect the faces of the stationary and rotating ele­
ments to make certain that they are clean. If clean­
ing is necessary, use a clean tissue to wipe lightly
in a circular pattern. After cleaning, apply a drop of
light oil to the seal faces.
Lightly oil and install the seal chamber O‐ring (13).
Postion the dust seal (110) in the seal chamber as
shown in Figure E‐1 and press it into the seal cham­
ber until fully seated.
Position the shaft sleeve (111) on the shaft with the
chamfer on the O.D. toward the impeller end of the
pump, and slide the sleeve onto the shaft until fully
seated.
Carefully position the assembled seal chamber,
dust seal, stationary seat and element over the
shaft until the sealing faces contact. Secure the
seal chamber to the lower mounting plate by tight­
ening the hardware (10 and 11) in an alternating
pattern.
Impeller Installation
Inspect the impeller (2) for cracks, broken vanes,
or wear from erosion, and replace it if damaged.
Clean the threads on the rotor shaft to remove any
old thread locking material.
Install the impeller key (8) in the shaft keyway, align
the impeller keyway, and press the impeller onto
the shaft until it seats firmly against the shaft
sleeve.
Install the impeller hardware (106, 107 and 108).
Wedge a block of wood between the vanes of the
impeller to prevent shaft rotation, and tighten the
impeller lock nut (108).
Remove the block of wood, and turn the impeller to
check for free rotation. Check the front clearance
after installing the impeller cover (105).
Install the pump casing (1) and secure it to the seal
chamber with the hardware (84 and 85).
Install the impeller cover gasket (7). Position the
impeller cover (88) over the pump casing (1) and
secure the cover with the hardware (103 and 104).
Impeller Clearance
For best performance, there should be a clearance
of .010 to .020 inch (0,25 to 0,51 mm) between the
impeller cover and the face of the impeller. Use a
feeler gauge to measure this clearance.
If the impeller scrapes against the back of the im­
peller cover when the impeller is turned by hand,
remove the impeller cover and add another impel­
ler cover gasket (7). Reinstall the impeller cover,
and recheck clearance.
Strainer Installation
Inspect the strainer (4) for cracks, distortion or ero­
sion, and replace it if defective.
Position the strainer squarely on the shoulder of
the impeller cover (105) and secure with the hard­
ware (5 and 6). Make certain that the strainer seats
properly against the shoulder of the impeller cover.
See VACUUM/PRESSURE TESTING and LU­
BRICATION before putting the pump back into
service.