Gorman-Rupp Pumps 06D17-GAR 708768 thru 1000782 - Manual (Page 30)

0 SERIES OM−01274
MAINTENANCE & REPAIR PAGE E − 10
The inboard bearing (28) will remain in the gearbox
housing. Reach through the cover plate opening to
remove the bearing.
With the pump end components removed, remove
the pipe plug (27) and use a drift pin to tap the pin-
ion shaft (46), intermediate (31) and bearings (29
and 35) from the gearbox housing (30).
After removing the shafts and bearings, clean and
inspect the bearings in place as follows.
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 shaft and bear-
ings are removed.
Clean the gear housing, helical gear, drive and pin-
ion shafts, and all component parts (except the
bearings) with a soft cloth soaked in cleaning sol-
vent. Inspect the parts for wear or damage and re-
place as necessary.
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.
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 greatly
shorten bearing life. Do not spin dry bear-
ings. This may scratch the balls or races
and cause premature bearing failure.
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 discolored, re-
place the bearings.
The bearing tolerances provide a tight press fit
onto the shafts and a snug slip fit into the gearbox
housing. Replace the bearings, shafts or gearbox
housing if the proper bearing fit is not achieved.
If the bearings, pinion or drive shafts require re-
placement, use a suitable puller to remove the
bearings from the shafts.
GEARBOX REASSEMBLY
Clean and inspect the bearings as indicated in
GEARBOX DISASSEMBLY.
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 shaft and bear-
ings are removed.
Inspect the helical gear (16), pinion shaft (46) and
drive shaft (23) for distortion, excessive wear, bro-
ken teeth, damaged keyways, nicks or scratches,
or for damage on the impeller or drive ends of the
shafts. Dress small nicks or burrs with a fine file or
emery cloth. Replace the shafts or gear as re-
quired.
NOTE
All of the bearings used in the gearbox are identical
parts; however, the inboard drive shaft bearing (28)
should not be heated and installed on the shaft
prior to reassembling the gearbox.
The outboard drive bearing (26) and pinion shaft
bearings (29 and 35) may be heated to ease instal-
lation. An induction heater, hot oil bath, electric
oven, or hot plate may be used to heat the bear-
ings. Bearings should never be heated with a di-
rect flame or directly on a hot plate.
NOTE
If a hot oil bath is used to heat the bearings, both the