575-2548: Hydraulic Element Oil Filter Cat® Filter Group (Tank Group) Minor box damage Cat® Oil Filter groups are designed to meet the needs of heavy duty equipment by providing superior protection against contaminants in hydraulic oil systems. Flow Direction : From outside to Inside Filtration Range : > 400 Bypass Opening Pressure : 3+0.5 Bar Dirt Holding Capacity : 25 g @ 2 Bar Initial Pressure Drop : 670 KPa Application: Cat® Oil Filter groups are used in hydraulic tank groups of Cat heavy duty equipment.