Caterpillar 198-6378 1986378 Fuel Water Separator

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  • Product Sku: 198-6378-1Pack
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Standard Efficiency Fuel Water Separator

Cat® Standard Efficiency Fuel Water Separators are designed to eliminate 100% free water and 90% emulsified water, along with smaller contaminates, while also helping extend the life of your fuel filter and fuel injectors.

Designed and built specifically for Cat equipment, our fuel water separators extend the life of your secondary filter and precision fuel system components.

Choosing genuine Cat filters is the best choice for protecting your Cat equipment.


  • Designed by Caterpillar to be an integrated component of your critical fuel system
  • No one knows Cat Fuel Systems better than Caterpillar
  • Cat Filters perform better than will-fitters - see the test results

Specifications for Cat 1986378 Fuel Water Separator:

Efficiency Rating: Standard Efficiency


Engine - Industrial
3126E C7


Fram PS3712, AC-DELCO LFF8012, ALLIANCE ABP-N10G-FF105D, ABP-N10G-FS1212, ABP-N10G-LK56CA, BALDWIN BF1212, BF1249, BF1252, BF1259-W, BF5801, BF5812, BF7798-SP, BK6227, BK6247, BK6266, BK6269, BK6371, BK6375, BK6376, BK6386, BK6395, BK6413, BK6419, BK6430, BK6431, BK6432, BK6433, BK6435, BK6439, BK6523, BK6588, FB1311, BIG-A 95405, 95415, 95431, 95439, CARQUEST 86405, 86415, 86431, 86439, 86441, 86693, 89770, CASE 90-3941T1, 903941T1, CATERPILLAR 198-6378, 202-9902, 3I-1365, CHAMPION HF501, CHAMPION ROAD 36849, CROSLAND 5027, CUMMINS 3308638, 3315843, 3355904, DENCKERMANN A120077, DETROIT-DIESEL 23516189, DONALDSON FFP555001, FFP555010, FFP558000, FFP558600, P553205, P555001, P558000, P558020, P559047, P559049, P559093, P559096, P559097, P559202, P559207, P559250, P559255, P559257, P559266, P559284, P559286, P559295, P559308, P559579, P559580, P559599, FIL ZP512AF, FILTRON PP965, FLEETGUARD 3304315S, FS1000, FS1015, FS1015B, FS1212, FS1242, FS1242B, FS19738, MK12416, FLEETRITE FSR-81212, MKR81451, FORD F1HZ-9155-C, GENERAL MOTORS 15587139, 25011689, HASTINGS BF1212, BF1249, BF1252, BF5812, BF7798-SP, FF1017, FF863, KF33, HENGST H169WK, HITACHI 4085912, 4185912, 4291867, IHC-NAVISTAR 1214920H1, 124920H1, 1669442C1, INGERSOLL-RAND 35357268, JOHN DEERE RE42050, KENWORTH KW1212, PS1212, KNECHT KC192, KOBELCO YN50VU0001D7, KRALINATOR CK44, FS244, LINK-BELT C6H0279, LUBER-FINER LFF8000, LFF8012, LFF8020, LFF8021, LFF90013, LK142CA, LK144D, LK152D, LK153D, LK182C, LK185T, LK202C, LK203CA, LK42C, LK56CA, LK60C, LK83CA, Magneti-Marelli 154776831184, MAHLE KC192, MANN WP9623X, MANN & HUMMEL WK950-16, MOTORCRAFT FD-3373, FD-813, FD-816, FD-816FP, FD3373, FD813, FD816, FD816-FP, NAPA 3405, 3405MP, 3415, 3431, 3439, 4770, NEW HOLLAND V79080, PUROLATOR F60024, F60027, RACOR B32001, S3201, SOGEFI FP5829, TROJAN 4609279, VERSATILE V79080, VOLVO 17001-0025, 3130948, 9912-15843, WESTERN-AUTO 17001-3444, WESTERN-STAR 17001-3444, WIX 24770, 33405, 33405MP, 33439, 33783


* All fitment filter part numbers are based on your engine serial number.
* Please confirm with our team if you are unsure this filter will fit your engine.

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Filter Reviews:
Frank K.
United States

Clean fuel is good

Perfect fit for the 3196. Change every oil change.