38
5.
Unbolt and remove the bearing
cap.
Fig. 12-9: Unbolt Bearing
Cap
Fig. 12-10: Remove Bearing
Cap
6. Extract the shaft by carefully
pulling the shaft towards the
motor end. It may be necessary
to lightly tap the pump side of the
shaft with a hammer against a
brass rod to unseat the shaft
assembly. There is a tight fit
between the shaft assembly and
the bearing frame.
Fig. 12-11: Tap Out Shaft
Assembly
Fig. 12-12: Remove Shaft
Assembly
12-b. INSPECTION & MAINTENANCE OF BEARING FRAME
The following components should be inspected and replaced as needed:
Bearings:
The bearings should be cleaned if they are dirty. If they seem to be noisy or rough when
rotated they need to be replaced. Check for pits or grooves in the outer race of the bearings and replace
the bearing unit if any are found. The oil should be changed whenever the bearings are replaced.
Shaft Assembly:
Check all rotating smooth machined surfaces for wear and scoring, and replace the
shaft assembly if necessary.
Labyrinth seals:
Replace the labyrinth seals if they are worn or damaged or if the O-rings are worn.
Oil: A
nsimag recommends flushing the bearing housing to remove dirt, grit and other impurities that
may have entered the bearing housing during shipment or installation. The recommended lubricant is
ISO VG 68 synthetic lubricant. Make the first oil change after 400 hours of operation for new bearings
if the pump is operating under normal conditions, i.e. experiencing only moderate temperature changes,
humidity and dirt. Check the level and condition of the oil through the sight glass on the bearing frame.
Check for unusual noise, vibration, and bearing frame oil temperatures.
