Case | Case-IH 660 Engine Overhaul Kits | 4-390 Naturally Aspirated Cummins "B" Series | OK20604

Cummins Control Parts List#'s (CPL): (591 Marine Engine), 681, (721 Marine Engine), 725, 791, 843, 895, 981, 1172, 1259, 1312, 1522 & 1932.

Serial & CPL#'s Are Found On A Tag Located On The Side Of The Timing Gear Housing And/Or Valve Cover. If Tag Is Missing, Check The Top Of The Oil Cooler Housing To See If It Is Stamped There.

Serial Number Consist Of 8 Digits. CPL#'s Are 3 Or 4 Digits.

Dim A (1): Standard Piston Marked: 6223

Dim B (2): Non-Emission

Dim C (3): 239 Cubic Inch

Cummins CPLs: 591*, 681, 721*, 725, 791, 843, 895, 981, 1172, 1259, 1312, 1522, 1932 (* Marine Eng)

Includes: Kit Contains: Cylinder Kits, Main & Con Rod Bearings, Front & Rear Crankshaft Seals, Top & Bottom Gasket Sets And Piston & Cam Bushing.