Design Of Governor Control Linkage Changed; Less Force Is Needed To Move The Accelerator Pedal
Usage:
3408 Truck Engine (28V)
Description of Change: The design of the governor control linkage has been changed so that less force is needed to move the accelerator pedal. With the new linkage, a force of 15 lb in (17.28 cmKg) of torque is needed to move the cross-shaft through 55 degrees of rotation. With the former governor control linkage, it was necessary to use a force of 20 lb in (23.04 cmKg) of torque to move the cross-shaft through 66 degrees of rotation.
Also, with the new design control linkage, there is enough clearance to connect the fuel transfer pump with a fuel line that comes from the front of the engine.
Adaptable To: The new parts, used together, are adaptable to all 3408 Truck Engines (28V).
Location of new parts.
Caterpillar Information System:
1978/02/08 Successful Engine Service-3208 Engine Booklet Is Available
1978/02/08 Stronger Front Support Assembly
1978/02/08 Smaller Quantity Of Oil Now Used In Engine Oil Pan; Prevents Contact Between Crankshaft And Oil
1978/02/08 New Water Pump Cover Has A Baffle And Wall To Send Coolant Flow From Bypass Line Directly Into Water Pump
1978/02/08 Oil Strainer (Screen) Added To Turbocharger Thrust Bearing
1978/02/08 Probable Causes Of Low Fuel Delivery During Testing On Fuel Injection Test Benches
1978/02/08 New Water Temperature Regulator Opens At 180 °F (82°C){1350,1355,7304}
1978/02/08 Complete Set Of Contact Points For Dial Indicators Is Now Available In One Group
1978/02/08 Attachment Groups Put Corrosion Inhibitor Directly Into Cooling System
1978/02/08 Do Not Change Factory Fuel Or Speed Settings On Truck Engines Unless New Settings Are Certified Under Applicable EPA Regulations
1978/02/08 Change In Design Of Engine Governor, Fuel Injection And Transfer Pump Groups, And Fuel Ratio Control Groups
1978/01/18 Improved Gasket Prevents Oil Leakage From The Governor
1978/03/01 Replacement Seals And Wear Sleeves Now Available As A Crankshaft Seal Kit
1978/03/01 Modification Of Oil Pan For Installation Of Oil Sump Heater
1978/03/01 Stronger Exhaust Manifold Gasket Now Used
1978/03/01 Use Again Specifications For Valve Springs Are Changed
1978/03/01 New Tachometer Drive Adapter Assembly Prevents Failure Of The Seals For The Tachometer Drive Group And Transfer Pump
1978/03/01 List Of Service Publications
1978/03/01 New Starter Motors Have Solenoid On Top Of Starter
1978/03/01 Replacement Seal Group For Water Pump Impeller Now Has All The Seal Parts Plus An Installation Tool
1978/03/01 Stronger Piston And Connecting Rod Are Tapered In Area Of Piston Pin
1978/03/01 Improved Fuel Priming Pump Assembly Has Better Sealing Characteristics; Repair Kit Available For Knob
1978/04/05 Correct Adjustment Of The Governor Control Linkage In Truck Engines Is Necessary To Prevent Low Power
1978/04/05 A Gasket Group Is Available To Give Improved Sealing For The Oil Supply To The Rocker Arms On Early Engines