Design Of Governor Control Linkage Changed; Less Force Is Needed To Move The Accelerator Pedal{1265,1269}
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:
1978/01/16 Improved Gasket Prevents Oil Leakage From The Governor{1264}
1978/01/16 Turbine Housing For Turbocharger Is Stronger{1052}
1978/01/16 New Turbine Housings Are The Replacement For Three Former Turbine Housings Used On Schwitzer Turbochargers{1052}
1978/01/16 Tolerance Added To Valve Clearance Specifications{1105,0374}
1978/01/16 Improved Front Pulley And Damper Groups Use New Damper Adapter With Larger Diameter Bolt Circle For Pulley Bolts{1205}
1978/01/09 Improved Water Shield For Exhaust Manifold{1067}
1978/01/09 Inner Member Of Caterpillar Coupling Must Be Restrained If The Connection To The Inner Member Is Removed{3252}
1978/01/09 5P8665 Cylinder Liner Puller Makes Liner Removal Easier And Faster{0621,1216}
1978/01/09 Improved Seal Used Between Impeller And Bearings On Water Pump Shaft{1361,1371}
1978/01/09 Service Tip: Use Caution When Hydraulically Operated Implements Must Be Lifted With A Hoist While The Engine Is Stopped{5050}
1978/01/09 Improved Water Pump Group Now Used{1361}
1987/12/21 New or Updated Drive Train Information Available In Guidelines For Reusable Parts{0374}
1978/01/23 Change In Design Of Engine Governor, Fuel Injection And Transfer Pump Groups, And Fuel Ratio Control Groups{1264,1278,1286}
1978/01/30 Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures{1105,1208}
1978/01/30 Oil Strainer (Screen) Added To Turbocharger Thrust Bearing{1052,1053}
1978/01/30 New Water Pump Cover Has A Baffle And Wall To Send Coolant Flow From Bypass Line Directly Into Water Pump{1361}
1978/01/30 Stronger Front Support Assembly{1153}
1978/01/30 Do Not Change Factory Fuel Or Speed Settings On Truck Engines Unless New Settings Are Certified Under Applicable EPA Regulations{0336,0337,1257}
1978/02/06 Smaller Quantity Of Oil Now Used In Engine Oil Pan; Prevents Contact Between Crankshaft And Oil{1318}
1978/02/06 Successful Engine Service-3208 Engine Booklet Is Available{1000}
1978/02/06 Attachment Groups Put Corrosion Inhibitor Directly Into Cooling System{1350}
1978/02/06 New Water Temperature Regulator Opens At 180°F (82°C){1350,1355,7304}
1978/02/06 Probable Causes Of Low Fuel Delivery During Testing On Fuel Injection Test Benches{0650,1250}
1978/02/13 Replacement Seal Group For Water Pump Impeller Now Has All The Seal Parts Plus An Installation Tool{1361,0622}