1979/08/06 Caterpillar

Front Accessory Drive Group Changed; New Drive Parts For Fuel Transfer Pump{1256,1206}

Usage:

D379, D398, D399 Industrial and Marine Engines;
G379, G398, G399 Gas Engines

Description of Change: Changes have been made to the front accessory drive group and the fuel transfer pump group on the above models. In the accessory drive group, the adapter and dowels are removed from the gear assembly for the transfer pump, and the gear (only) is now used in the group. At the same time, a new fuel transfer pump group has the existing fuel transfer pump group as a component, plus a new coupling assembly and shaft. The new coupling assembly and shaft fit in place of the former adapter which was part of the accessory drive gear assembly. The new drive parts will give longer service life.

Adaptable As: Direct replacement when the necessary parts are used together.

Caterpillar Information System:

1979/08/06 When Timing The Engine, Be Sure The Timing Bolt Is Installed In The Correct Hole In The Flywheel{1156,1251,1281}

1979/08/06 Use Correct Installation Procedure For Clutch Pilot Bearing In Rear Power Takeoff{3055}

1979/08/06 New Tools Are Available For Gasket Removal And Surface Reconditioning{0670}

1979/07/09 New Cylinder Liner Has Improved Design To Keep Liner Temperatures Lower{1216}

1979/07/09 New Shaft Assembly Used In Governor Group And New Coupling Assembly Used In Drive Group For Governor And Fuel Injection Pump{1264,1288}

1979/07/09 New Valve Cover Gasket Has Better Material{1107}

1979/07/09 Caution Label Added To 5P4150 Nozzle Testing Group{0651}

1979/07/02 Fuel Injection Line For Injection Test Bench Is Available From Caterpillar{0652,1250}

1979/07/02 Improved Engine Design Uses Cylinder Block With Spacer Plate And New Crankshaft Thrust Plates{1000}

1979/07/02 6V109 Torque Multiplier Available For Use With Hydraulic Cylinder Repair Stand{0614}

1979/07/02 To Prevent A Possible Change In The Fuel Rack Setting, A Specific Assembly Procedure Must Be Used To Tighten The Bolt On The Governor Stop Collar{1259,1257,1250}

1979/06/25 6V2010 Polishing Stone Available{0622}

1979/08/06 Changes Made To 8S2243 And 8S4613 Wrenches Used On Fuel Injection Pumps{0612,1251}

1979/08/13 Splash Shields Added To Caterpillar Fuel Injection Test Bench{0652}

1979/08/13 New Seal Used Under Retaining Bushing For Fuel Injection Pump Bonnet{1251,1253,1286}

1979/08/13 5P936 Liner Seat Insert Available For 6.25 Bore Engine Blocks With Counterbores{1217}

1979/08/13 6V14 Hydraulic Cylinder Group Now Available{0621}

1979/08/13 New 35-Ampere Alternator Used On Some Engines In Caterpillar Equipment{1405,1406}

1979/08/13 New Cylinder Head Gasket Has Smaller Diameter Cylinder Openings To Improve Location Of Combustion Seal Ring{1101,1201}

1979/08/13 Sealant Now Used On Pipe Plugs At The Bottom Of The Oil Filter Base Assembly To Prevent Oil Leakage{1306}

1979/08/20 Flex Plate Kits Are Now Available For Vickers Vane-Type Hydraulic Pumps{5055}

1979/08/20 Turbocharger Bearings Are Now Available In More Different Sizes For Better Turbocharger Reconditioning{1053}

1979/08/20 New Rear Cover And Gasket Used On Water Pump{1361,1350}

1979/08/27 Why Engines Are Damaged By Fuel Sulfur{1104,1216,1280,1318,1215}