SEAL AS 8C3839 - Caterpillar

Electric Power Generation: 3412 GENSET (S/N: 4BZ1-UP; 1EZ1-UP; 3FZ1-UP)Engine: 3408 (S/N: 67U1-UP; 99U1-UP; 28V1-UP; 78Z1-UP) 3408B (S/N: 9TD1-UP; 1LG1-UP; 2BG1-UP; 8RG1-UP; 67U1-UP; 99U1-UP; 28V1-UP; 78Z1-UP) 3408C (S/N: 8RG1-UP; TAM1-UP; 9XM1-UP; 67U1-UP; 99U1-UP; 78Z1-UP) 3408E (S/N: 7PR1-UP) 3412 (S/N: 9XF1-UP; 2WJ1-UP; 3JK1-UP; 7BL1-UP; 60M1-UP; BCS1-UP; 38S1-UP; 81Z1-UP) 3412C (S/N: BAK1-UP; 3JK1-UP; 60M1-UP; DJN1-UP; 9EP1-UP; RLR1-UP; 8AR1-UP; 9BR1-UP; TFT1-UP; BCW1-UP; LRY1-UP; RTY1-UP; 81Z1-UP; 1EZ1-UP; 3FZ1-UP) 3412E (S/N: TGC1-UP; 4CR1-UP; BFT1-UP; 1EZ1-UP)Generator Set: 3412C GEN SET (S/N: BAX1-UP)Industrial Engine: 3408C IND (S/N: 9ER1-UP) 3412C IND (S/N: 38S1-UP) 3412D (S/N: REA1-UP) 3412E IND (S/N: BDT1-UP)Marine Engine: 3408C MARINE (S/N: 1TS1-UP) 3412E MARINE (S/N: 9KS1-UP; 9PW1-UP)Pumper: SCT673 (S/N: 2SZ1-UP) SPS342 (S/N: 2SZ1-UP) SPT342 (S/N: 2SZ1-UP)Petroleum Engine: 3412E PETROLEUM (S/N: Z2D1-UP)Wheel Loader: 988B (S/N: 48W1-UP) 992B (S/N: 98S1-UP)Introduction
The problem that is identified below does not have a permanent solution. Until a permanent solution is available, use the solution that is identified below.Problem
Reports have been received that the 4W-5733 Valve Adapter and the 4W-5719 Adapter As will fail and separate into two pieces. This separation is due to a suspect weld process from the supplier. Remanufactured cylinder heads and long block assemblies contain these parts. The following remanufactured part numbers are affected by this problem: 0R-4131 Cylinder Head Gp , 0R-4141 Cylinder Head Gp , 0R-4145 Cylinder Head Gp , 0R-4128 Cylinder Head Gp , 0R-4130 Cylinder Head Gp , 0R-4138 Cylinder Head Gp , 0R-3673 Cylinder Head Gp , 0R-3718 Cylinder Head Gp , 0R-4275 Long Cylinder Block , 0R-4277 Cylinder Block Gp and 0R-3711 Cylinder Block Gp .Solution
All dealer and customer inventory of the 4W-5733 Valve Adapter and the 4W-5719 Adapter As must be inspected. This inspection will ensure that the weld process from the supplier was completed. Cylinder heads and long block assemblies with a date code after "032 12" have adapters with the correct weld process completed. These adapters do not require inspection.