The Campbell-Hausfeld breakdown of your compressor shows the part number for your compressor's pump is WL372001AL. If you go to www.ereplacementparts.com and do a part number search, you'll get a good breakdown of your pump with part numbers. The piston and cylinder come as a kit and it's the only way to get either part. You can get the parts you need there or use the part numbers to search the web to see if you can find better prices. That site has fair prices and their S&H isn't too bad either.
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The Campbell-Hausfeld breakdown of your compressor shows the part number for your compressor's pump is WL372001AL. If you go to www.ereplacementparts.com and do a part number search, you'll get a good breakdown of your pump with part numbers. The piston and cylinder come as a kit and it's the only way to get either part. You can get the parts you need there or use the part numbers to search the web to see if you can find better prices. That site has fair prices and their S&H isn't too bad either.