During the high-speed motor repair process, if disassembly operations are required, please note the following points. Some high-speed motor components are relatively delicate and should be handled with care to avoid damage.

When dismantling the end cap and armature, vibration can damage the carbon brushes, so the carbon brushes should first be removed from the carbon brush holder.

The angle between the two carbon brushes and the commutator may not be the same. To ensure they can be reassembled to their original state during installation, the left and right carbon brushes must not be installed backwards. Therefore, it is necessary to mark them before removing them. Additionally, be cautious not to damage the contact surface between the carbon brushes and the commutator.

At one end of a high-speed motor, there is typically a cooling fan, and at the other end, there might be a magnetic steel or a speed sensor. When removing the cooling fan blades or the magnetic steel/speed sensor, one must be extremely careful to avoid damaging the fan blades or the speed-sensing magnetic steel.

Ensure a mark is made on the fan shaft sleeve or between the magnet steel shaft sleeve and the shaft, so that the installation can be returned to the original marked position after repair.

Due to the dynamic balance test of high-speed motors being conducted with blades or speed sensors (speed measuring magnets), it is crucial to reassemble them according to the marks made during disassembly. If the speed sensor or fan blades are damaged, or if reassembly is not done according to the marks, even if other parts are well-repaired, the entire unit may experience unbalanced vibration during high-speed operation.

When disassembling a high-speed motor, hammers and chisels should not be used for forceful敲打 or prying. Instead, a puller should be employed. When using a puller, ensure that the tip is directly positioned on the tip hole. A protective pad should be placed between the puller tip and the tip hole to protect the tip hole on the armature shaft from damage. Secure the end caps of the motor, and make a mark on the bottom end cap before disassembly to facilitate reassembly in the original configuration after repair.

The bearings on the armature should be carefully cleaned by using clean aviation gasoline. After the gasoline dries, fill the bearing chamber with 7014 (or 7018) bearing grease. High-speed motor bearings cannot use ordinary grease or molybdenum disulfide. Place them in a clean area for use; if the commutator surface is flat and has a purple sheen, this is an oxide layer that protects the commutator surface. Simply remove the surface dust with a soft brush.