1979/04/04 Caterpillar


New Woodward Governor Control Used On Diesel Engines; Former Control Now Used On Gas Engines Only

Usage:




D343, D346, D348, D349, D353, D379, D398, D399, 3406, 3408, 3412 Industrial Engines;
G343, G353, G379, G398, G399 Gas Engines

Description of Change: A new electronic control is used with Woodward governors on diesel engines. The new control improves governor transient response (action in relation to rapid or temporary load changes), with better control of RPM and voltage output.

While the new control gives more precision in the operation of diesel engines, it will not give good stability of operation on gas engines. Because of fuel flow characteristics, the gas engine governor can not control the engine with the same degree of precision as a diesel engine governor.

For this reason, the new control is released for diesel engine models only, and the former control is still used on gas engine models. To permit better control of records and distribution, the former part numbers are canceled and new part numbers are used for both the new and former controls.

Adaptable To: All earlier engines.

Caterpillar Information System:

1979/04/04 List Of Service Publications
1979/04/04 Four Crankshaft Rear Seals Are Available For Use On 3304 And 3306 Engines
1979/04/04 New Oil Jet Tube In Cylinder Block Gives More Clearance For Pistons And Connecting Rods
1979/04/04 New Fabricated Tools Available For Service Work On 7211 And 7221 Marine Transmissions
1979/03/14 Replacement Bushing Available For Cast Iron Rocker Arms Only
1979/03/14 Information About The Use Of Earlier Cylinder Heads And Liners With Spacer Plate Cylinder Blocks; List Of Earlier Articles
1979/03/14 Revision To Guideline For Reusable Parts Is Available
1979/03/14 List Of Service Publications
1979/03/14 Larger Diameter Washer Is Used To Hold Air Transfer Pipe In Aftercooler Flange
1979/03/14 Maintenance Procedures For Extended FPTO Life On 3408 And 3412 Marine Engines
1979/03/14 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings
1979/03/14 8L4525 Flange Is Available Again For Parts Service Of 3192 Marine Transmissions
1979/04/04 Improved Fuel Priming Pumps Give Longer Service Life
1979/04/04 Fabricated Air-To-Water Aftercooler Available For Dynamometer Testing Of Engines Equipped With Air-To-Air Aftercoolers
1979/04/04 A Reverse Connection Of Oil Filter Hoses Can Cause Bearing Failures
1979/04/04 New Pistons And Timing Advance Unit Give Better Emissions Control And Easier Starts
1979/04/25 6V112 Repair Kit Available For Parts Service Of The 8H8558 Nut Spinner
1979/04/25 Inspection Of Connecting Rods In Parts Stocks
1979/04/25 Conversion Group Available To Install Woodward Governor On Engines Equipped With Mechanical Governor
1979/04/25 Careful, Correct Installation And Maintenance Of Fuel Injection Lines Is Very Important To Prevent Possible Engine Damage, Fire And Other Problems
1979/04/25 Inspection Of Oil Pump After Long Periods Of Service Can Prevent Engine Damage
1979/04/25 How To Extend The Service Life Of 1P5550 Fuel Cam Locking Tool Assembly
1979/04/25 New Oil Cooler Bonnets Used On 3408 And 3412 Engines
1979/04/25 Inspection Of Oil Filters In Parts Stocks
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