Filter Added To Drain Hole In Water Pumps{1361}
Usage:
D348 Engines, D10 Tractors, 776 Tractors, 777 Trucks
Description of Change: A filter has been added to the drain hole in water pump bodies on D348 Engines. Formerly, the drain hole was open and could become plugged with dirt. This could then cause coolant to be forced around the water pump seal and into the lubrication oil. The filter helps prevent the drain hole from being plugged.
Adaptable To: The 4N5834 Filter has been added to the 6N6366 Water Pump Group as shown in the chart.
To add the filter to a water pump group on earlier D348 Engines, use an 8 mm (.312") drill and enlarge the existing drain hole in the body. (See Illustration.)
Location of filter in water pump group.
Caterpillar Information System:
1985/11/18 Remanufactured Crankshafts Are Available In Standard And Two Undersize Dimensions (U.S. and Canada){1202,7754}
1985/11/18 Bolt Removed From Governor And Fuel Injection Pump Group{1286,1253,1287}
1985/11/11 Two Different Piston Oil Ring Designs Used{1215}
1985/11/11 Caterpillar Offers Remanufactured Turbocharged 3208 Engines At Significant Savings{1000,7754}
1985/11/11 Anti-Seize Compound And/Or Grease Not To Be Used On Fuel Pump Bonnet Retaining Bushings{1251}
1985/11/11 New Retaining Rings Used In BrakeSaver Groups{1155}
1985/11/11 Tape Tool Marker Is Available{0600}
1985/11/11 Special Bolts Help Prevent Unauthorized Modification Of Fuel System And Governor Settings{1250,1264,1278,1287}
1985/11/11 Effects Of Liner Wear In Engines Using Plasma Coated Top Rings{1215,1216,7770}
1985/11/11 Exhaust Manifold Gasket Leaks May Be Prevented By Correct Installation{1059,1050,1061}
1985/11/04 New Instruction Films (Decals) Available {7405,7451}
1985/11/04 Meter Panel Cover Folds Down Completely {7451}
1985/11/25 Faster Response Water Temperature Regulators; Service Simplified{1350,1355}
1985/11/25 New Fuel Ratio Control Group Used On Engines Equipped With New Scroll Fuel System{1278}
1985/11/25 Output Shaft Group Improved{3305}
1985/11/25 Canister Size Of Coolant Conditioner Element Has Changed{1350}
1985/11/25 Oil Pressure Shutdown Specifications Change For Hydramechanical Shutoff System{1085}
1985/12/09 New Ratchet Wrenches Available For Tube Fittings{0600}
1985/12/09 A Water Separator Can Help Prevent Fuel Injector Damage If Fuel Is Contaminated With Water{1263,1250,1273}
1985/12/09 Service Life Of OEM Primary Fuel Filters{1250,1260}
1985/12/09 New, Tougher Gasket Used Between Block And Front Housing{1151,7555}
1985/12/16 Troubleshooting Of Jacket Water Heaters{1383}
1985/12/16 Use Care When Handling Turbocharger Compressor Wheels{1052,1077}
1985/12/16 Later 3406B And 3408B Truck Engines Have Higher Minimum Coolant Temperatures{1350,1355}