Gorman-Rupp Pumps 06C1-GHH 1071445 and up - Manual (Page 43)

0 SERIES OM-03179
MAINTENANCE & REPAIR PAGE E - 18
sparks, and flame. Read and follow all
precautions printed on solvent contain­
ers.
Clean the bearings thoroughly in fresh cleaning
solvent. Dry the bearings with filtered compressed
air and coat with light oil.
Bearings must be kept free of all dirt and
foreign material. Failure to do so will great­
ly shorten bearing life. Do not spin dry
bearings. This may scratch the balls or
races and cause premature bearing fail­
ure.
Rotate the bearings by hand to check for rough­
ness or binding and inspect the bearing balls. If ro­
tation is rough or the bearing balls are discolored,
replace the bearings.
The bearing tolerances provide a tight press fit
onto the shafts or a snug slip fit into the gearbox
housing. Replace the bearings, shafts, or gearbox
housing if the proper bearing fit is not achieved.
Although bearings should be cleaned and in­
spected in place to prevent damage during remov­
al, it is strongly recommended that bearings be re­
placed any time the gearbox is disassembled.
GEARBOX REASSEMBLY
Unless otherwise specified, the instructions in this
section are keyed to Figures 2 and 2A, and the ac­
companying parts lists.
Clean and inspect the bearings as indicated in
Cleaning and Inspecting Bearings.
To prevent damage during removal from
the shaft, it is recommended that bearings
be cleaned and inspected in place. It is
strongly recommended that the bearings
be replaced any time the gearbox is disas­
sembled.
Inspect the shafts for distortion, damaged key­
ways, nicks or scratches, or for damage on the im­
peller or drive ends. Dress small nicks and burrs
with a fine file or emery cloth. Replace the shafts if
defective.
Check all oil seal and gasket seating surfaces for
nicks and scratches. Dress small nicks and burrs
with a fine file or emery cloth. Be careful not to dis­
tort the shape of the surfaces.
When reassembling the gearbox, replace all gas­
kets and O‐rings. Apply a light coating of oil on
mating surfaces shafts, gears and oil seals to ease
reassembly.
Impeller Shaft Reassembly
Use two 3/8-16 UNC by 1-1/2 inch long cap­
screws (not supplied) to secure the bearing stop
(G‐R P/N 29511-904) to the housing diagonally
across the opening for the bearing cap (33).
Position the gearbox housing on the bed of an ar­
bor (or hydraulic) press with the opening for the
bearing cap (33) facing down. Support the gear­
box housing on wooden blocks while in this posi­
tion.
Use the bearing driver (G‐R P/N 29511-903) to
press the front bearing (38) into the gearbox hous­
ing until seated against the bearing stop.
To prevent damage to the bearings during
reassembly, do not tap or drive bearings
into place with a hammer. Install bearings
on shafts and into bores using the desig­
nated driving tools and an arbor or hydrau­
lic press.
Use the bearing driver (G‐R P/N 29511-905) to
press the rear bearing (42) onto the impeller shaft
(39) until fully seated against the shaft shoulder.
Use the bearing driver (G‐R P/N 29511-905) to
press the assembled impeller shaft and bearing
into the gearbox housing until the shaft shoulder
seats squarely against the front bearing (38).
Idler Shaft Reassembly
Reposition the gearbox housing with the opening
for the bearing cap (33) facing up. Support the