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This guide is for owners and technicians maintaining 7.2" Ametek Lamb vacuum motors, specifically those operating at 220–240V with 28-bar, 1.125" commutators. The key benefit is restoring optimal motor performance and extending its lifespan through a precise, durable replacement part. A potential caveat is ensuring compatibility with the exact motor specifications before purchase. These genuine Reliapart carbon brushes (MPN: 833415-55) ensure efficient electrical contact, featuring a durable construction and exact dimensions for a proper fit. Key features include an exact fit for specified motors, durable carbon material, optimal dimensions (28mm x 10mm x 6.5mm), easy installation, and a pack of two brushes.
| Model Part Number | 833415-55 |
|---|---|
| Brand | Reliapart |
No, these specific Reliapart carbon brushes (833415-55) are designed for 220–240V Ametek Lamb motors only.
This refers to the physical dimensions and type of the commutator, the rotating part of the motor's armature with which the brushes make contact. '1.125"' is the diameter, and '28-bar' indicates the number of segments.
The lifespan of carbon brushes varies based on usage. Inspect them periodically, typically every 6-12 months for regularly used equipment, or when you notice a decline in motor performance. Replace them when they are significantly worn down.
It is strongly recommended to use brushes with the exact specified dimensions. Using brushes that are too large or too small can lead to poor performance, increased wear, or damage to the motor and commutator.
Carbon brushes typically do not require lubrication; they rely on the natural lubricating properties of carbon and the surface of the commutator.
Please refer to the specific warranty information provided by the retailer or manufacturer (Reliapart) at the time of purchase for details on warranty duration and coverage.
While minor cleaning might be possible, it is best practice to remove the old brushes to gain clear access to the commutator for thorough cleaning to ensure optimal contact with the new brushes.
Ensure the new carbon brushes are correctly seated and making firm contact with the commutator. Double-check that the vacuum cleaner is properly reassembled and plugged in. Verify motor compatibility.
Confirm that the brushes are the correct size and type for your motor. Ensure the commutator is clean and free from carbon dust or damage. Check for any other obstructions in the vacuum system.
Excessive sparking can indicate worn brushes, a dirty or damaged commutator, or a faulty motor. Inspect brushes for wear and the commutator for cleanliness. If issues persist, the motor may require further professional inspection.
This could indicate a problem with the commutator (e.g., rough surface, out of true) or that the motor is being operated under excessive load. Ensure the motor is not overloaded and that the commutator is smooth.
Compatibility:
Before installation, verify that your vacuum motor is a 7.2" Ametek Lamb model operating on 220–240V and features a 28-bar, 1.125" commutator. These carbon brushes (833415-55) are specifically designed for this configuration.
Setup & Installation:
Care:
Carbon brushes are a wear item. Regular inspection is recommended, especially if you notice performance degradation. While the brushes themselves do not require cleaning, ensure the commutator surface they contact is clean and free from debris. Replace brushes when they are visibly worn down to approximately half their original thickness or show signs of damage.
