g) When the bearing assembly is fully cooled,remove the locknut, install the lockwasher (382),
and install the locknut.
h) 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 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.
i)
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 resist-
ance must be high.
• If the outer races are loose, the bearing is not properly seated and must be retightened.
j)
When you have achieved the proper bearing assembly, set the lockwasher tab in the slot in the
locknut.
k)
Coat the internal bearing surfaces with lubricant to be used in service.
228
360
119A
123
370P
123B
Figure 65: Bearing frame
3.
Press the radial bearing isolator (123) oil seal into the radial end cover (119A).
4.
Install the radial-bearing end cover (119A) and new end-cover gasket (360) on the bearing frame.
Make sure that the expulsion part is at the 6 o'clock position and is properly seated.
For the optional radial heat flinger (123B), the radial-heat flinger replaces the standard radial bear-
ing isolator (123).
5.
Perform the following based on your pump version:
If your pump
is...
Then...
13i
Press the radial bearing isolator (123) into the bearing frame and make sure that the
expulsion part is at the 6 o'clock position and is properly seated. See Figure 66.
All other
frames sizes
Install the radial end cover gasket (360) and radial end cover/bearing isolator assembly. Se-
cure to the frame with cap screws (370P) and tighten evenly to the torque values show in the
Maximum torque values for the 3700i fasteners table.
6.6 Reassembly
94
Model 3700i API610 / Type OH2 Installation, Operation, and Maintenance Manual
