Gorman-Rupp Pumps 06C1-GHH 1071445 and up - Manual (Page 37)

0 SERIES OM-03179
MAINTENANCE & REPAIR PAGE E - 12
If the gearbox requires disassembly, refer to
GEARBOX DISASSEMBLY and GEARBOX RE­
ASSEMBLY, followed by PUMP AND SEAL REAS­
SEMBLY.
Pump Casing Installation
If the wear ring (18) was removed, position the re­
placement ring in the pump casing with the cham­
fered end toward the bore shoulder. Press the wear
ring into the pump casing until fully seated.
NOTE
The wear ring must seat squarely in teh pump cas­
ing; otherwise, binding and/or excessive wear will
occur as the shaft turns.
Apply a thin coat of “Permatex Aviation No. 3 Form‐
A‐Gasket” to the contact surfaces of the oil seal
(13) and the casing bore. Position the oil seal in the
pump 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.
Install the stationary seal element and O‐ring in the
seal bore as described in Seal Reassembly and
Installation before securing the pump casing to
the adaptor.
With the stationary seal seat installed in the seal
bore of the pump casing, lubricate the O‐ring (11),
and slide it onto the pump casing shoulder.
Position the pump casing gasket (17) over the cas­
ing studs (15).
Before further reassembly, calculate the thickness
of bearing adjusting shims (12) required to obtain a
shaft end play of .005 to .010 inch (0,127 to 0,254
mm). Use a depth micrometer to measure the
height of the pump casing shoulder (with the gas­
ket installed), and the depth of the bearing in the
gearbox housing from the gasket mating surface.
Select a combination of shims to make up the dif­
ference between the two measurements, and in­
stall the bearing shims in the bearing bore.
Lubricate the lip of the oil seal (13) to ease installa­
tion. Apply “Never‐Seez” or equivalent compound
to the casing studs (15). 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 or the stationary seal element.
Use “Loctite 242” or equivalent compound on the
nuts (16) and secure the pump casing to the gear­
box housing with the nuts.
Seal Reassembly and Installation
(Figures 1 and 4)
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-
ventilated area free from excessive
heat, sparks, and flame. Read and fol­
low all precautions printed on solvent
containers.
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.
Inspect the seal components for wear, scoring,
grooves, and other damage that might cause leak­
age. If any components are worn, replace the com­
plete seal; never mix old and new seal parts.
If a replacement seal is being used, remove it from
the container and inspect the precision finished
faces to ensure that they are free of any foreign
matter.
To ease installation of the seal, lubricate the bel­
lows and stationary element O‐ring with water or a
very small amount of light lubricating oil, and apply
a drop of light lubricating oil on the finished faces.
Assemble the seal as follows, (see Figure 4).