1983/09/05 Caterpillar

Service Information Available For Altronic Ignition System{1552}

Usage:

G379 ( 72B468-Up ),
G398 ( 73B906-Up ) And G399 ( 49C261-Up ) Natural Gas Engines

New service information is available for the Altronic ignition on the above engines. "Supplement For G379, G398 And G399 Engines, For Altronic Ignition System", Form SENR2983 is available for use when service work is needed on those engines in the serial number ranges shown above. This Supplement is to be used in addition to the Service Manual, Form REG01228, for G379, G398 and G399 Engines.

This supplement has specifications, system operation, testing and adjusting, troubleshooting and disassembly and assembly information on the Altronic ignition system.

NOTE: This Supplement can be used as a reference for G342 Natural Gas Engines. Additional information for these engines will be available at a later date.

Caterpillar Information System:

1983/09/05 New Inspection Report Forms Available{0336,0372,7550}

1983/08/22 New Governor Drive Gears And Weight Assemblies{1264}

1983/08/22 Improved Voltage Regulator Assembly Now Used{4450,4467}

1983/08/15 Replacement Parts And Service For 6V3021 Crimping Tool And 6V3022 Cable Cutter{0610}

1983/08/15 New Water Seals Used In Cylinder Head Groups{1115,1101}

1983/08/15 New Fuel Ratio Control Group Has Improved Diaphragm{1278,1257,1251}

1983/08/15 Troubleshooting Engine Vibration; Damper Adapter Can Be Changed{1205,1000}

1983/08/15 3512 Generator Set Engines (1500 And 1800 RPM) Must Use Flywheel Balance Weights{1156}

1983/08/15 New Turbocharger Exhaust Coupling Prevents Exhaust Gas Leakage{1052,1059,1061}

1983/08/15 Digital Tachometer Available{7462}

1983/08/15 Recommendations To Avoid Piston Seizures{1214,1213,1215}

1983/08/15 Repair Of Damaged Threads{0660}

1983/09/05 Replacement Counterweights And Information For Replacement Of Counterweights And Balancing The Crankshaft{1202,0652}

1983/09/05 Larger Oil Pump Used To Give Better Clutch Cooling And Bearing Lubrication{3310,3302,3307}

1983/09/05 New Piston Oil Rings{1215}

1983/09/05 6V3100 Engine Timing Indicator Group May Have 6V9710 Or 6V2192 Transducer{0651}

1983/09/05 Vent Hole In Water Temperature Regulator Cover Removed{1355}

1983/09/05 Engine Maintenance Information Films Available{1318,1352,0375}

1983/09/12 New Larger Auxiliary Sea Water Pump Operates At Lower RPM{1371}

1983/09/12 New Dust Covers Available For Twin Disc IBF318 And IBF321 Rear Power Take-Off Clutches{3055}

1983/09/12 Parts Service Information For Pistons, Connecting Rods, Piston Pins And Rings{1214,1225,1215,1218}

1983/09/26 Oil Shield And Rotocoil Must Be Installed Together For Acceptable Oil Control{1109}

1983/09/26 Service Information For Woodward Governors{0374,1264}

1983/09/26 New Bearing Used On Main Shaft{3303}