Finish Thompson A101990-3 Drive Magnet Assembly 6 Pole 56C Frame
The A101990-3 is the drive magnet assembly 6 pole 56c frame used in Finish Thompson KC5.5, KC6, KC6H, KC7, KC8 and KC10 magnetic drive pumps. It is the outer magnet carrier that drives the impeller magnet through the barrier, in the six pole rating for a NEMA 56C motor.
Treat it as a service item rather than a permanent fitting. Decoupling is the usual reason for replacement, and the heat of a slip can leave magnets permanently weaker even when the carrier looks sound. When ordering, match the part to the pump as it was actually built rather than to the catalog model alone, since material and size options were specified at the time of purchase.
Key Features
- Drive Magnet Assembly 6 Pole 56C Frame built to the original factory specification
- Six pole rating sized for NEMA 56C motor frames
- Sealless coupling with no shaft passing into the fluid
- Sized and finished to drop straight into the position it came from
- Inexpensive component whose failure takes the whole pump out of service
Applications
- Finish Thompson KC5.5, KC6, KC6H, KC7, KC8 and KC10 magnetic drive pumps
- KC series pumps on 56C frame motors
- Rebuild after a closed discharge or blocked suction event
- Scheduled overhaul and annual inspection of the pump
- Repair of a pump taken out of service after a leak or a loss of performance
Specifications
- Brand: Finish Thompson
- Manufacturer Part Number: A101990-3
- Part Type: Drive Magnet Assembly 6 Pole 56C Frame
- Position: On the motor shaft behind the adapter
- Fits: Finish Thompson KC5.5, KC6, KC6H, KC7, KC8 and KC10 magnetic drive pumps
- Quantity Per Pump: 1
- Condition: New
Frequently Asked Questions
Q: Is this the genuine manufacturer part?
Yes. It is the factory component built to the original specification rather than a pattern copy.
Q: Should anything else be replaced at the same time?
Whatever the teardown exposes. Elastomers and bushings are inexpensive and are best renewed while the pump is already apart.
Q: What causes most premature failures on this part?
Running the pump outside what it was specified for, whether that is temperature, viscosity, dry running or an incompatible chemical.
Q: Does fitting this affect the pump warranty?
Using the factory part keeps the pump to its original specification, which is what any warranty position depends on.
Not sure this is the right part? Send us a Picture of the pump plate on your pump and the CLR Marine team will confirm the correct drive magnet assembly before you order.
CLRMarine
