SEAL RING-PISTON 2116973 - Caterpillar

(9CK) Truck EnginesReference: Special Instruction, SEHS9921, "Guidelines For Uprating The 275, 325, And 350 HP 3176B Truck Engine"Flash programs and personality modules have been developed to improve the uprateability of the these truck engines without iron changes. The improvement include:
* The ability to uprate a 275 hp engine to 300 hp* The ability to uprate a 325 hp engine to 350 hp* The ability to uprate a 350 hp engine to 365 hp.* The ability to uprate 325 hp engines, with serial number 9CK18309 - Up, to 350 or 365 hpThis uprateability will allow customers the flexibility to increase their engines horsepower rating if the application should change.
The ReferenceSpecial Instruction provides complete information about the components and procedures necessary to uprate these engines.