DOLPHIN CAINAN SERIES SPARE PARTS

Cainan robots slipping on vertical walls is primarily caused by worn gray tracks slipping on vertical gresite walls or by clogged cleaning brushes. When the inner teeth of the track lose traction or the elastomer hardens due to pool chemicals, the robot can no longer maintain its grip on gresite.

To resolve this loss of traction, check three structural components:

• The two side tracks, to check whether the belts are loose against the chassis.
• The front brushes or traction rings, to check for severe wear.
• The upper turbine, to check that it generates enough vertical suction toward the floor.

Replacing the treads restores traction and the full half-round cleaning cycle.

To choose the right Dolphin Cainan Series replacement parts, locate the identification label with the serial number on the lower casing of the unit. Although the Cainan 1 and Cainan 2 share the same physical structure, some parts vary, such as the filter basket type, the power supply, or whether additional motors are present, depending on the programmed cleaning cycle.

Consult the manufacturer’s exploded parts diagram to check the 7-digit numerical code engraved on the defective part. Purchasing components with Maytronics’ official codes prevents premature failures caused by misalignment in the motor assembly and ensures a proper seal at the gaskets.

The loss of small-particle retention is due to deterioration of the filter panel, not a mechanical failure of the turbine. The upper propeller generates only the upward flow that pushes filtered water outward, while fine-dust retention depends on the micron rating of the basket’s side panels.

If water is forcefully expelled through the upper nozzle but the bottom remains cloudy after the cycle, you should install replacement ultrafine filters. Standard cartridges trap leaves and coarse debris, but ultrafine panels are needed to capture sand or particles smaller than 50 microns. Visually check whether the mesh has cracks or has become stiff due to calcification.

The main difference between the filtration systems in these models lies in the format of the container and the standard porosity level. While certain Cainan 1 versions use filter bags or basic coarse-filtration baskets, the Cainan 2 features interchangeable modular panels integrated into a rigid basket that can be removed from the top.

The Cainan 2’s modular frames allow you to switch between spring cartridges for collecting leaves and fine panels for microscopic dust during the active swimming season. Always check the basket’s attachment type on your robot to select a replacement set compatible with its plastic frame.

The turbine propeller can be installed directly without dismantling the motor’s watertight assembly, allowing any user to complete the replacement with a conventional screwdriver in less than 10 minutes. There is no need to open the sealed chamber that protects the electronic board to replace the outer propeller or flow guard.

The replacement process consists of the following steps:

• Disconnect the power supply from the electrical outlet to eliminate the risk of electric shock.
• Remove the screws from the upper diffuser that cover the discharge duct.
• Remove the worn or blocked propeller by gently pulling it off the motor shaft.
• Fit the new propeller, ensuring the inner recess seats firmly over the shaft key.

This basic procedure restores proper thrust without compromising the sealed module’s warranty.

The fastest-wearing components on Cainan pool cleaners are the rubber tracks, active roller bearings, and filter cartridges. The estimated service life for belts and brushes is 2 to 3 seasons of regular use in residential pools, varying with the roughness of the lining and chlorine level.

It’s a good idea to replace the drive belts if you notice lateral play of more than 5 millimeters or if the robot spins in place without moving in a straight line. Wheel bearings should be replaced as soon as they show resistance when turned by hand to avoid overloading the internal drive motor.

A failure to change direction while moving is usually caused by a broken drive gear or wear in the lateral drive shaft bearing. When one of the two drive pulleys does not receive torque from the roller, the unit becomes unbalanced and interrupts the programmed automatic turning maneuver.

Inspect the side channel by unscrewing the trim cover to check for small stones trapped between the teeth of the reduction gear. If the pinions show burrs or worn tooth profiles, replacing the drive assembly will restore driving agility on sloped floors and curved corners.