FITS FOR CATERPILLAR CAT E320 ENGINE FILTER AIR, FUEL, OIL, HYDRAULIC SERVICE. Oil Filter 1 PCS ST10715. Fuel Filter 1 PCS ST20702 Air filter 1 PCS ST 40613AB Hydraulic filter 1 PCS 30805. HYDRAULIC FILTER SUCTION 1 PCS ST70810. Pilot hydraulic filter 1 PCS ST30771. OIL FILTER PILOT VALVE ST30732. MOTTROL USA EXCAVATOR PARTS DEPOT. YOUR BEST SOURCE FOR OEM QUALITY EXCAVATOR PARTS. For the parts described with both part number and application machine model or engine model, please make sure to order according to the part number, the application machine model or engine model is just for reference.