GEAR-TRANSFER 2135174 - Caterpillar

can also occur to the other valve assemblies. A new valve with less flow restriction is now used in the piston and at the other two locations in the pump. These valves are directly adaptable to earlier engines. ****Combustion Gas Leakage Around Fuel Nozzles**** There is a possibility that combustion gases can escape by a fuel injection nozzle and into the adapter. The high temperatures soften the end of the nozzle body and cause the tip to come off. The usual cause for escaping combustion gases is either a loose nozzle in the adapter or a cut in the carbon dam (gas seal). See Illustration 1. Nozzle hold down clamps are all now tightened properly, and an improved chamfer is machined inside the bottom of the adapters to prevent cutting the carbon dam. ILLUSTRATION 1 (SEE ILLUSTRATION) Affected Models And Parts Needed Some of the following vehicles contain the 3406 Engine with the former scroll fuel system and are not in this Program. PIN's (Product Identification No.) Or Serial No. Model Both Problems Gas Leakage Only 3406B Truck Engine 7FB1-8348 8349 - 10145 3406B Marine Engine 4TB1-383 384 - 396 3406B Industrial Engine 6TB1-1184 1185 - 1276 3406B Generator Set 2WB1-1044 1045 - 1166 16G Motor Grader 93U2284-93U2417 93U2418-93U2432 245 Excavator 95V1084-95V1111 95V1112-95V1116 245 Excavator 94L525-94L622 -- -- 245 Front Shovel 82X618-82X620 -- -- 245 Front Shovel 84X686-84X768 -- -- 824C Tractor 85X958-85X1065 85X1066-85X1069 825C Compactor 86X634-86X680 86X681-86X684 826C Compactor 87X338-87X417 87X418-87X432 980C Loader 63X4923-63X5351 63X5352-63X5401 980C Loader 13B373-13B469 -- -- New Parts Needed (Replace Transfer Pump Valves): 3 - 7W402 Valve Assembly 1 - 6F6672 Seal 1 - 7W801 Seal 1 - 3D2898 Seal 1 - 6J2419 Seal 1 - 5P8215 Seal 1 - 3D2824 Seal 1 - 4J8997 Seal New Parts Needed (To Check For Combustion Gas Leakage): 1 - 8N8299 Gasket (Air Inlet - Aftercooler) 8N7007 Nozzle Assembly, as required 1W2950