Oil Holes In Crankshaft Main And Rod Journals{1202}
Usage:
3400 Family Of Engines
Formerly, a large chamfer was machined on the oil holes in the crankshaft main and rod journals. See the illustration. A new smaller chamfer has been used for several years. To make the new small chamfer, a hand tool is used to break (remove) the sharp edge of the oil hole. Then the oil hole is hand blended smooth. The result may be a non-uniform small chamfer (when compared to the former chamfer) around the oil hole.
NOTE: NO crankshafts should be reworked to provide the larger chamfer.
Comparison of chamfer on the current oil hole (A) and the former oil hole (B) in the crankshaft main and rod journals.
Caterpillar Information System:
1992/11/09 Improved Fuel Injection Line Assemblies And Clamps Used{1252}
1992/11/09 Replacement Governors For Early Engines{1264}
1992/11/09 Relay Replacement Kits Available To Replace Relays In Engine Mounted Junction Box{1423,1422}
1992/11/09 Correct Identification Of Rocker Arm Assembly Components{1123}
1992/10/26 3406 Truck Engine Component Update{1052,1119,1201,1202,1205,1214,1218,1254,1288,1803}
1992/10/26 Improved Windshield Wiper Motor Crank Assemblies Available For Parts Service{7305}
1992/10/12 Improved Hour Meters (Electric){7450,7480}
1992/10/05 Product Support Literature{0374}
1992/10/05 New Cylinder Head Groups Provides Lower Valve Guide Temperatures{1100,1104,1112,1123}
1992/10/05 Thicker Head Gaskets Available For Use With Resurfaced Cylinder Blocks{1124}
1992/09/28 New NEXG4516 Marine/Industrial Service Program Module(SPM) Available {1900,0782}
1992/09/28 Service Tools Available {0600,0700}
1992/11/09 New Liner Seat Inserts Available{1217}
1992/11/09 New 690 Main Rotor Lamination For 3500 SR4 Power Generators{4457}
1992/11/16 New Connecting Rod Assembly Used{1218}
1992/11/16 New Spacer Plate Gasket Provides Improved Sealing Around Push Rod Compartment{1221}
1992/11/16 New Cylinder Head Gasket, Spacer Plate And Head Bolts Used; New Cylinder Liner Projection Measurement Method; New Cylinder Head Torque Sequence{1124,1221,1216}
1992/11/23 New Gasket And Plate Used In Front Housing Group To Help Prevent Oil Leaks{1151}
1992/11/23 Supplemental Coolant Additive Requirements{1352,1395,1063}
1992/11/23 Procedure For Seating The Ball In The Fuel Return 4L8546 Check Valve{1274}
1992/11/23 New Service Seal Used In Altronic III Magnetos{1552}
1992/11/23 Be Sure To Use Correct Cup Plugs On 0R2077, 0R2554, And 0R3258 Remanufactured Short Blocks{1200,1201}
1992/11/23 Oil Filter Group Improved{1318}
1992/11/30 Reporting Incidents{0337}