Difference between the 7550 and the 7538 pump:
The LaPlante 7538 is used by a number of air compressor manufacturers, so if the specs match your compressor, and it will mount to your air tank, this pump will work. The listing is for the bare LaPlante Compressor pump and wheel, only. You will need to check the oil level and add compressor oil as necessary upon receipt.
LaPlante Compressor has been manufacturing air compressors and parts for air compressors for over 20 years. These are high quality air pumps at wholesale prices. All pumps carry the original manufacturer's warranty. Feel free to contact us with any questions. Thank you.