How do you choose a CAT filter?
Which filter fits a CAT 320D?
Choose the filter whose reference and application are confirmed for your machine serial number. CAT 320D alone is insufficient: our catalogue distinguishes oil filter 1R-0716 from fuel/water-separator filter 227-2380. They serve different functions; the list does not prove compatibility with every variant.
What should be compared before ordering?
Photograph the legible old-part reference and machine plate. Identify the circuit: engine oil, fuel or hydraulics. Dimensions and connections help a check, but similar shapes do not confirm filtration performance or manufacturer specifications. Have your technician and our team verify the information.
How should replacement be prepared?
Use the manual for the machine serial number for fluids, intervals and procedures. Do not transfer another machine's interval or buy from a photo alone. If the need is uncertain, request a diagnosis first; visits, parts and delivery depend on quotation and availability.
Manufacturer sources
Cat Parts — identification par équipement et numéro de série