6.5.2 Fastening
WARNING:
Risk of serious personal injury or property damage. Fasteners such as bolts and nuts are criti-
cal to the safe and reliable operation of the product. Ensure appropriate use of fasteners during
installation or reassembly of the unit.
•
Use fasteners of the proper size and material only.
•
Replace all corroded fasteners.
•
Ensure that all fasteners are properly tightened and that there are no missing fasteners.
6.5.3 Bearing-frame inspection
Checklist
Check the bearing frame for these conditions:
•
Visually inspect the bearing frame and frame foot for cracks.
•
Check the inside surfaces of the frame for rust, scale, or debris. Remove all loose and foreign ma-
terial.
•
Make sure that all lubrication passages are clear.
•
If the frame has been exposed to pumped fluid, inspect the frame for corrosion or pitting.
•
Inspect the inboard-bearing bores.
If any bores are outside the measurements in the Bearing fits and tolerances table, replace the
bearing frame.
•
Inspect the shafts and sleeves for wear.
•
Inspect the labyrinth seal O-rings for cuts and cracks.
6.6 Reassembly
6.6.1 Assemble the bearing frame
WARNING:
Do not use a flame to heat bearings. This will damage the bearing surfaces.
Wear insulated gloves when you use a bearing heater. Bearings get hot and can cause physi-
cal injury.
1.
Install the bearings on the shaft:
a) Use an induction bearing heater in order to heat the bearings to approximately 250°F (121°C ).
This expands the bearings to ease their installation on the shaft.
b) Install the radial bearing (409) onto the shaft (122). For the S, M, L, and XL groups, make sure
that the spacer ring is placed between the shaft shoulder and inner race.
Care must be taken to keep the inner race together with the roller assembly during installation.
c)
Place the thrust-bearing retainer ring (253B) on the shaft between the bearing fits with a small
diameter-facing coupling end.
d) Determine the orientation of the angular contact thrust bearings (112) for back-to-back mount-
ing.
This is with the thick shoulders of the outer races together.
6.6 Reassembly
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