Goulds Pumps 3420 - IOM - Manual (Page 75)

bearing housing with the labyrinth seal installed and a
bearing housing gasket (360). Slide the housing
assembly over the radial bearing.
7. Secure the bearing housing by installing four bearing
housing to end cover capscrews (371C). Tighten the
capscrews to the torque value shown in Table 11.
8. Install the thrust (outboard end) bearing housing (134)
with a bearing housing gasket (360). Slide the
bearing housing over the thrust bearing.
9. Secure the bearing housing by installing four bearing
housing to end cover capscrews (371C). Tighten the
capscrews to the torque value shown in Table 11.
B. M Group, 18x20-24 and 20x24-28
1. Oil Lubrication: Slide both oil throwers (248) on the
shaft (122).
Grease Lubrication: Slide both deflectors (248) on
the shaft (122).
2. Grease Lubrication only - Install the grease seals
(333) in the bearing housings (134A) using a suitably
sized arbor.
3. Slide the bearing housings (134A) on the shaft and
install the bearings. The radial (coupling end) bearing
(168A) is a single row ball bearing and the thrust
(outboard) bearing (112A) is a duplex angular contact
bearing.
NOTE: The duplex bearing is mounted back to back.
Make sure the orientaion is correct.
NOTE: There are several ways to install bearings.
The recommended method is to use an induction
heater that heats as well as demagnitizes the bearings.
s
! WARNING
Wear insulated gloves when using a bearing heater.
The bearings will get hot and can cause physical
injury.
NOTE: Coat internal surfaces of bearings with the
lubricant that is to be used in service.
4. Grease Lubrication only - Install the grease shields
(346A) on the oil ring sleeves (207 and 208).
5. Slide the oil ring sleeves (207n and 208 or 323 and
324) on the shaft against the bearings.
6. Place the bearing lockwashers (382) and the bearing
locknuts (136) on the shaft. After the bearings and
shaft have cooled to ambient temperature, tighten the
locknut to the torque value shown in Table 11. Bend
any tang of the lockwasher into a slot on the locknut.
7. Bolt the oil ring housings (515) with a gasket (360G)
to the bearing housing on each end of the shaft.
Tighten the oil ring housing to bearing housing
capscrews (371T) to the torque value shown in Table
11.
NOTE: Rotating element total travel is adjusted by
adding oil ring housing to bearing housing gaskets
(360G) on the thrust (outboard) end of the pump in a
later step.
8. Oil Lubrication only
a. Place oil rings (114) in position on the groove in
the oil ring sleeves (323 and 324).
b. Install the oil ring retaining bracket (398A) in the
oil ring housing (515).
c. Bolt the end covers (109A and 119A) to the oil
ring housings. Tighten the capscrews (371S) to the
torque value shown in Table 11.
d. Slide the coupling end dust covers (123 and 123A)
on the shaft.
C. L Group
1. Oil Lubrication: Slide the oil throwers (248) and the
bearing housings (134 and 134A) on the shaft (122).
Grease Lubrication: Slide the deflectors (123) and the
bearing housings (134 and 134A) on the shaft (122).
2. Slide the roller bearings (409 and 410) on the shaft
until they contact the shaft shoulder.
NOTE: The inner race of the roller bearing has a
tapered bore. Make sure the large bore end of the
bearing faces the end of the shaft. The lip of the
adapter sleeve slides under the inner race of the
bearing.
3. Lightly oil the shaft and the outside diameter of the
adapter sleeve. Slide the lip of the sleeve under the
inner race of the bearing.
4. For Oil Lubrication Only: Slide the oil ring sleeves
(324) on the shaft.
5. Place the bearing lockwashers (382) and the bearing
locknuts (136) on the shaft and tighten finger tight.
6. Adjust the roller bearing clearances:
a. Rotate the shaft until a roller is in the top vertical
position.
b. Measure the clearance between the roller and the
outer race with a feeler gauge. The amount of
adjustment to the internal clearance is based on this
initial clearance. Consult the bearing manufacturer’s
installation procedure for the proper amount of
residual internal clearance.
c. Tighten the bearing locknut until the recommended
clearance is obtained.
3420 IOM 8/09
71
6