Goulds Pumps 3640 - IOM - Manual (Page 79)

Maintenance
f) Hand-tighten the locknut with a spanner wrench. Do not over-tighten the bearing. Tap
the end of the spanner wrench with light strikes from a dead blow hammer while you
note the location of the next available lockwasher tab that aligns with the slots in the
locknut.
The turning resistance of the nut increases as it tightens. Plan the alignment of the
lockwasher tab with the locknut fully tightened. If the locknut is still turning with light
strikes with the hammer, then continue to tighten the locknut until the next available tab
is aligned with a slot. Do not use heavy strikes with the hammer. If it is not possible to
reach the next tab, then loosen the locknut to align with the previous tab.
g) Check the condition of the outer races by rotating the bearings by hand in opposite
directions:
• The outer races generally cannot be counter-rotated by hand, but if they do move,
the resistance must be high.
• If the outer races are loose, the bearing is not properly seated and must be
retightened.
h) When you have achieved the proper bearing assembly, set the lockwasher tab in the
slot in the locknut.
4. Install the bearing housing (134) over the bearings. Finger-tighten the nuts (427J) on the
studs (371T). Insert the dowel pins (469J); then tighten the nuts (427J).
The bearing housing is doweled to the casing (100) during the original build to assure the
correct running position of the shaft.
NOTICE:
The bearing housing flange must fit metal-to-metal (no gap) to the bearing saddle flange.
5. Tighten the inboard end-cover capscrews (317C).
6. Install the oil ring (114).
7. Install the bearing end cover (109A) and the bearing end-cover gasket (360A) with the end-
cover capscrews (371C).
8. When new bearings are installed, you must measure the axial end play:
a) Bolt the end cover to the thrust housing.
b) Move the shaft axially from the coupling end.
Model 3640 Installation, Operation, and Maintenance Manual 77