I. Basic Information and Core Parameters

• Product Code: 1689370

• Combination Attribute: Carbon brush assembly with spring, a dedicated wear-and-tear replacement part for washing machine motors.

• Dimension Specifications:
  Thickness 5mm × Width 15mm × Length 30mm, fitting the standard installation size of washing machine motor brush slots.

II. Application Scenarios and Compatible Models

• Scope of Application:
  Suitable for drive motors of top-loading and front-loading washing machines (commonly used in models with universal motors or DC motors).

• Brand and Model References:

• This specification is commonly found in washing machine models from brands such as Haier, Siemens, and Midea (e.g., Haier XQG100-BD14976LU1, Siemens WM12P2602W).

• Verify the size of the motor brush slot and the specification of the spring interface before replacement (spring pressure for some models needs to match 1.8–2.5kg).

III. Technical Parameters and Working Mechanism

1. Material Characteristics:

• The carbon brush body is made of graphite-based composite material (with wear-resistant additives), with a resistance coefficient of 10⁻⁴Ω·m and a wear rate <0.08mm/100 hours.

• The spring is made of stainless steel (SUS304), with corrosion resistance and a pressure retention rate >90% (after 1,000 hours of use).

2. Current Conduction Principle:

• The carbon brush contacts the motor commutator through spring pressure to conduct current to the rotor windings, driving the washing machine drum/agitator to rotate (e.g., drum motor at 1,000 RPM).

3. Wear Replacement Threshold:

• Replace immediately when the remaining length of the carbon brush is less than 1/2 of the original, or when abnormal sparking or weak operation of the washing machine occurs to avoid damaging the commutator.

IV. Installation and Maintenance Key Points

• Installation Steps:

1. Power off and remove the motor end cover, then take out the old carbon brush assembly (including the spring).

2. Clean the carbon powder on the commutator surface with alcohol and check for scratches on the commutator.

3. The new carbon brush should fit the arc of the commutator, and the spring should be stuck into the fixed slot (ensure uniform pressure).

• Maintenance Suggestions:

• Inspect wear every 1–2 years or 200 washing cycles, and it is recommended to replace the carbon brush and spring simultaneously (the set is easier to match pressure parameters).

V. Differences Comparison with Other Carbon Brushes

VI. Purchase and Replacement Recommendations

• Specification Confirmation:

• In addition to dimensions, verify the current-carrying capacity of the carbon brush (usually 5–8A) and the compatible motor voltage (220V household standard).

• Professional Tips:

• If the washing machine experiences startup delay or abnormal noise, the carbon brush may be worn or the spring may be 失效 (failed). It is recommended to contact after-sales service for replacement to avoid motor short circuit caused by unprofessional operation.