CARTRIDGE GP-TURBOCHARGER 4W1225 - Caterpillar

3508, 3512, 3516 High Speed Industrial, Generator Set, Marine Engines;
D11N, 776B Tractors;
777B, 785, 789 TrucksDescription of Change: A new front idler gear and a new accessory drive gear are used in the 3500 Family of High Speed Engines, including D11N and 776B Tractors, and 777B, 785, and 789 Trucks. Both new gears have a different heat treat process, which gives more resistance to pitting and a deeper heat treated case.Adaptable To: Both new gears are effective with the following models. 3508 Generator Set: 23Z2394, 1ZF4753508 Industrial: 95Y7523508 Marine: 96Y9603508 Vehicular: 97Y6703512 Generator Set: 24Z2601, 3YF3603512 Industrial: 49Y5283512 Marine: 50Y8133512 Vehicular: 51Y5793516 Generator Set: 25Z1555, 4XF2613516 Industrial: 27Z6713516 Marine: 29Z9023516 Vehicular: 28Z6223516 Locomotive: 9KF48D11N, 776B Tractor (engine): 99W1694785 Truck (engine): 96Z482789 Truck (engine): 54Z322The new 7E0275 Gear (accessory drive) can be used directly in place of the former 7N5250 Gear. This former gear is identified by the number "7N5250" on the gear.
The new 7E0274 Idler Gear Assembly can replace the former 7N5241 Gear Assembly. This former gear assembly is identified by the number "7N5249" on the gear.
A new 7E0338 Front Gear Group has replaced the former 8N7174 Front Gear Group.