Owner's manual

Troubleshooting
1. Check to see if the plastic that surrounds the outboard thrust bearing is melted.
2. Check to see if the plastic that surrounds the carbon or silicon carbide impeller radial
bearings is melted.
3. Check to see if the plastic that surrounds the inboard thrust bearings is melted.
4. If the impeller seizes on the shaft due to excessive heat, the shaft can spin in the shaft
spider, which wears the inside diameter of the shaft spider.
Figure 76: Increase in heat generation
Alignment troubleshooting
Symptom Cause Remedy
Horizontal (side-to-side) alignment cannot The driver feet are bolt-bound. Loosen the pump's hold-down bolts, and
be obtained (angular or parallel). slide the pump and driver until you
achieve horizontal alignment.
The baseplate is not leveled properly and
1. Determine which corners of the base-
is probably twisted.
plate are high or low.
2. Remove or add shims at the appropri-
ate corners.
3. Realign the pump and driver.
Vertical (top-to-bottom) alignment cannot The baseplate is not leveled properly and
1. Determine if the center of the base-
be obtained (angular or parallel). is probably bowed.
plate should be raised or lowered.
2. Level screws equally at the center of
the baseplate.
3. Realign the pump and driver.
3298 Family Installation, Operation, and Maintenance Manual 85