1982/02/22 Caterpillar

Use The Correct Governor For Parallel Applications{1289,1264}

Usage:

D348 And D349 Industrial Engines;
D379, D398, And D399 Generator Set Engines

Several different Woodward UG8 Governor groups are available for use on the above engines. Each of the governor groups has an application where they give the best performance.

Our recommendation is to use the 7N2702 Woodward Governor Group in parallel generator set applications. This governor group gives the best performance in parallel applications because of its slower operation. This slower operation permits more stability in this application.

Some of the other Woodward Governors operate too fast for use in parallel applications. They make corrections too fast for small speed changes caused by mechanical problems (governor drive gears, linkage, fuel rack, etc.) and/or electrical problems (circulating currents, unbalanced voltage regulators, etc.). When two or more of these governors are used in parallel they get into a resonant vibration. This will cause severe load changes from engine to engine.

Caterpillar Information System:

1982/02/22 New Poppet Valve Will Decrease Chatter{3313}

1982/02/22 Improved Bearing Used In Rear Power Takeoff Groups{3055}

1982/02/22 Torque/Pressure Conversion Table For 6V200 Hydraulic Wrench{0614,0623}

1982/02/15 Stronger Spanner Wrenches Now Available{0612,0613}

1982/02/15 New Fuel Nozzle Adapter Assembly Used{1106}

1982/02/15 New Camshaft Has Improved Profile (Shape) Of Exhaust Cams{1210}

1982/02/15 Hose Assembly Moved To A New Position{1274}

1982/02/15 New 6V4810 Tool Group Used To Service Vehicles Equipped With VE (Vehicular Environmental) Series Electrical Connectors In Electrical Harness{0610,0620}

1982/02/08 Use Microfiche Libraries For Up-To-Date Information{0374}

1982/02/08 New 6V4818 Driver Available To Install Rack Bearings In Fuel Injection Pump Housings{0622}

1982/02/08 The Service Publications Information Feedback System{0374}

1982/02/08 New Piston Pin Retainer Used{1214,1225}

1982/02/22 New Main Bearings And Connecting Rod Bearings Have Thicker Layer Of Surface Material{1230,1203,1219}

1982/02/22 Use A Magnetic Chuck To Hold Parts On Work Bench{0626}

1982/02/22 Engine Storage; Engine Start-Up After Storage{1000}

1982/02/22 Use 6V6035 Hardness Tester On Crankshafts{0651,1202}

1982/02/22 New Idler Shaft Used In Fuel Transfer Pumps{1256}

1982/03/01 Brass Plug Used To Prevent Corrosion{3320}

1982/03/01 New Gasket Used In Governor And Fuel Injection Pump Group{1259,1286}

1982/03/01 New Marine Gear Groups Have New Clutch Plates{3302}

1982/03/08 New Double-Wall Fuel Injection Lines Group And Fuel Drain Group Available As Attachments For Protection Against Fuel Leakage{1252,1254,7400}

1982/03/08 Reconditioning of Bridge Wear Seat Is Permitted; Will Prevent Bridge Replacement When Not Necessary{1100}

1982/03/08 Heavy Duty Air Cleaner Available, With Precleaner And Automatic Dust Ejector{1051,1055,1061,1062}

1982/03/08 New Adapters And O-Ring Seals Used In Aftercooler Group{1063}