The AstralPool CX280 service kit contains two aftermarket parts: a mechanical seal to suit a 3/4″ shaft with carbon / ceramic faces, replacing Astral 75508 and Onga 700270, and a 20 µF (20 uF / 20 MFD) 450 VAC CBB60 run capacitor with core leads. There is no bearing set in this kit. Before fitting, match the µF printed on your old capacitor and compare your old seal with the photos.
What’s in the AstralPool CX280 service kit
Each kit holds one shaft seal and one run capacitor to suit the CX280. Both are also sold on their own if you only need one: the seal is the same part as our 3/4″ pool pump seal, and the capacitor is our general 20 µF CBB60 capacitor.
- Mechanical seal for the CX280: suits a 3/4″ shaft, carbon / ceramic faces, replaces Astral 75508 and Onga 700270.
- Run capacitor for the CX280: 20 µF, 450 VAC, CBB60 motor-run body with core leads.
Why service the CX280 seal and capacitor together
Getting at the seal means isolating the power, draining the pump and separating the motor from the wet end. The capacitor sits on the same motor, so once the pump is on the bench it costs very little extra time to fit a fresh one as well.
Run capacitors lose capacitance gradually with heat and age, and a weak one often goes unnoticed until the motor starts struggling to get going. Renewing it during a seal job means you are not opening the pump up again a few months later for a separate fault.
Order of work for a CX280 seal and capacitor job
Turn the pump off at the wall and isolate it, then let the capacitor sit for a few minutes before touching its terminals, as it can hold a charge. Photograph the wiring before disconnecting anything. If you are not confident with mains wiring, have an electrician do this part. Swap the capacitor first while the motor is still mounted, then move on to the seal: release the motor from the pump body, take off the impeller, and remove both halves of the old seal before pressing in the new seat. Refit, fill with water so the new seal never runs dry, and restart.
Check your CX280 parts before you order
Read the µF value printed on your old capacitor and compare your old seal with the photos. If either does not match the CX280 data above, contact us with a photo of the pump label and old parts. Unused parts can come back under our returns policy, and kits to suit other AstralPool pumps are listed under AstralPool service kits.
Before you order
Check the old parts before fitting: match the µF printed on your old capacitor and the size of your old seal.