Description
Astralpool bearing kit 4405010859
The Astralpool bearing kit 4405010859 is an original replacement set of motor bearings for selected Astralpool pool pumps. It is designed
to restore smooth, quiet rotation of the motor shaft when the original bearings have become noisy or worn after years of intensive
filtration use.
Function of the Astralpool bearing kit
Motor bearings support the shaft and allow it to rotate at high speed with minimal friction. On a pool pump that runs many hours a day,
these bearings gradually wear under the combined effects of load, temperature and occasional moisture. The Astralpool bearing kit
4405010859 provides correctly sized bearings that match the original motor specification, so the shaft runs true and the hydraulic part
receives stable, vibration free drive.
Replacing worn bearings with the correct kit reduces noise, restores efficiency and helps protect other components such as the
mechanical seal and impeller from excessive vibration.
Design and contents of the bearing kit 4405010859
The kit groups the main motor bearings required for compatible Astralpool pumps, so both front and rear supports can be renewed in a
single service operation. The bearings are manufactured to standard dimensions with appropriate load ratings and sealed or shielded
design depending on the motor type.
- Original style bearings matched to the shaft diameter and motor housing.
- High quality races and balls for smooth, low friction rotation.
- Sealed or shielded design (depending on motor version) to protect against dust and moisture.
- Kit format so front and rear bearings can be changed together.
Compatibility and typical applications
The Astralpool bearing kit 4405010859 is intended for use on specific Astralpool circulation pumps that list this reference in the motor
section of their exploded view or spare parts list. It is especially relevant for residential pool pumps that have been in service for
several seasons and now show signs of bearing noise or rough running.
- Suitable for Astralpool pool pumps that specify bearing kit 4405010859.
- Used in small and medium residential filtration systems with sand, glass or cartridge filters.
- Ideal during a major overhaul combined with a new mechanical seal and shaft protection parts.
Before ordering, always confirm the bearing kit reference against the documentation of your exact pump model and motor type.
When to replace the bearings
Bearings are wear components and eventual replacement is normal on a pump that runs many hours per day. Recognising early symptoms and
renewing the bearings with the Astralpool bearing kit 4405010859 helps avoid more serious motor damage.
- Increasing humming, grinding or rumbling noises coming from the motor.
- Motor that becomes hotter than usual for the same operating conditions.
- Noticeable play or roughness when the shaft is turned by hand with the pump disconnected.
- Vibration in the pump body even after cleaning the prefilter and filter.
Changing bearings proactively is often less costly than replacing a complete motor after prolonged noisy operation.
Installation and service recommendations
Bearing replacement is a technical operation and is generally carried out by an experienced technician or motor repair specialist. The
pump must be completely isolated electrically and hydraulically before the motor is removed for service.
- Switch off the power, close valves and disconnect the pump hydraulically.
- Remove the motor from the pump body and disassemble the end bells following motor manufacturer instructions.
- Extract the old bearings using suitable pullers, avoiding damage to the shaft or housings.
- Clean shaft shoulders and bearing seats thoroughly before installing new bearings from kit 4405010859.
- Press the new bearings into place using proper tools, applying force only to the correct race.
- Reassemble the motor, refit the mechanical seal and impeller, then reinstall the motor on the pump body.
After reassembly, the shaft should turn freely and quietly by hand. Once the pump is primed and started, verify that noise levels are
normal and that there is no abnormal vibration.
Good practice for long bearing life
With new bearings from the Astralpool bearing kit 4405010859 installed, a few simple habits help maximise service life and overall pump
reliability.
- Keep the technical room dry and well ventilated to limit condensation around the motor.
- Ensure correct voltage supply and avoid frequent, unnecessary start stop cycles.
- Replace the mechanical seal promptly if leaks occur to prevent water reaching the motor front bearing.
- Monitor noise and vibration periodically and schedule maintenance before severe wear develops.
Using the original Astralpool bearing kit 4405010859 during pump refurbishment restores smooth, quiet motor operation and supports many
more seasons of efficient pool filtration.
