MANIFOLD-EXHAUST 9Y1230 - Caterpillar

283 kW (380 hp) 3406 Truck Engines (92U28617-Up Except For Those Arrangements Approved By The California Air Resources Board (CARB)SUPPLEMENT: 05/09/83SERVICE MAGAZINE, APRIL 5, 1982, PAGE 4.In the article, "Conversion Of 49-State 3406 Truck Engines From 283 kW (380 hp) To 298 kW (400 hp) Arrangements," an addition to a chart is necessary. Add the information which follows to the "Parts For Conversion" chart. --------------- END SUPPLEMENT ---------------Dealers want to know if conversion of a 3406 Truck Engine from a 283 kw (380 hp) arrangement to a 298 kw (400 hp) arrangement is possible. This conversion can be made only to EPA-approved, 49-state engine arrangements; however, the CARB has not approved any 298 kW (400 hp) arrangements, thus, the conversion can not be made to CARB-approved arrangements.
Two conversion procedures are given. The first procedure is used for engines with Serial Numbers 92U28617 and up, except for CARB-approved arrangements and for the 1W9706 Arrangement. The second procedure is used for conversion of the 1W9706 Arrangement, a 298 kW (400 hp) engine derated to 283 kW (380 hp), back to a 298 kW (400 hp) engine.
The complete conversion to the new arrangement must be made. The Clean Air Act