WK965x Fuel Filter - main applications: CASE CONSTRUCTION 21-Serie (Radlader / Wheel Loaders). CATERPILLAR C (Motoren / Engines). DOOSAN DL - Radlader / Wheel Loaders. FODEN Alpha (2000, 3000, 4000). HITACHI EX- Serie (Raupenbagger / Crawler Excavator). SENNEBOGEN 800D - Serie, 800E - Serie. SI