Gorman-Rupp Pumps 04E1-GA 1171927 and up - Manual (Page 26)

0 SERIES OM−03745
MAINTENANCE & REPAIR PAGE E − 6
Place the pump casing (1) on a clean surface with
the suction head opening facing up, and use a
screwdriver or other suitable tool to press the oil
seal (34) from the pump casing.
If the discharge flange (14) or O-ring (7) require re-
placement, remove the hardware (8 and 9), and
pull the flange from the pump casing. Remove the
O-ring from the groove in the flange.
If no further disassembly is required, proceed with
PUMP AND SEAL REASSEMBLY. If the gearbox
requires disassembly, do not reassemble the
pump components at this time. Refer to GEAR-
BOX DISASSEMBLY and GEARBOX REAS-
SEMBLY, followed by PUMP AND SEAL REAS-
SEMBLY.
PUMP AND SEAL REASSEMBLY
If the gearbox requires disassembly, refer to
GEARBOX DISASSEMBLY and GEARBOX
REASSEMBLY, followed by PUMP AND SEAL
REASSEMBLY.
Pump Casing Installation
If the discharge flange (14) was removed, lubricate
a new O-ring (7) and install it in the groove in the
flange. Press the flange into the pump casing and
secure it with the hardware (8 and 9).
If the wear ring (39) was removed for replacement,
press the replacement ring into the pump casing
(1) until it seats squarely against the shoulder bore.
The wear ring must seat squarely in the
pump casing bore or binding and/or ex-
cessive wear will result.
Position the oil seal (34) in the casing bore with the
lip positioned as shown in Figure 1. Press the oil
seal into the bore until fully seated against the bore
shoulder.
Lubricate the O-ring (38) and install it in the groove
in the gearbox housing (33). Install the same thick-
ness of bearing adjusting shims (35) as previously
removed.
NOTE
Shaft endplay should be between .005 and .012
inch (0,127 and 0,305 mm). Add or remove bearing
shims to achieve correct endplay.
Install the gearbox housing gasket (4) over the cas-
ing studs (36). Carefully slide the pump casing
over the shaft until fully seated against the gearbox
housing. Be careful not to damage the lip of the oil
seal on the shaft keyway. Make sure the bearing
shims remain in position in the casing bore. Secure
the casing to the gearbox with the nuts (37).
Seal Reassembly and Installation
(Figures 1 and 2)
Clean the seal cavity and shaft with a cloth soaked
in fresh cleaning solvent.
Most cleaning solvents are toxic and
flammable. Use them only in a well-ven-
tilated area free from excessive heat,
sparks, and flame. Read and follow all
precautions printed on solvent contain-
ers.
The seal is not normally reused because wear pat-
terns on the finished faces cannot be realigned
during reassembly. This could result in premature
failure. If necessary to reuse an old seal in an emer-
gency, carefully wash all metallic parts in fresh
cleaning solvent and allow to dry thoroughly.
Handle the seal parts with extreme care to prevent
damage. Be careful not to contaminate precision
finished faces; even fingerprints on the faces can
shorten seal life. If necessary, clean the faces with a
non-oil based solvent and a clean, lint-free tissue.
Wipe lightly in a concentric pattern to avoid
scratching the faces.