Improved Gasket Prevents Oil Leakage From The Governor
Usage:
D348, D349, D379, D398, D399 Engines
Description of Change: A gasket made of acetal resin is now used on the oil pressure regulating valve assembly for the governor used on the above engines. Also, on 6.25" Bore "V" Engines this same gasket is used with the 7L8709 Plug Assembly in the governor group. The new gasket will stop oil leakage better than the former gasket which was made of copper.
Adaptable As: Direct replacement for the former gasket in this application.
Location of new gasket.
Caterpillar Information System:
1978/01/18 5P8665 Cylinder Liner Puller Makes Liner Removal Easier And Faster
1978/01/18 Turbine Housing For Turbocharger Is Stronger
1978/01/18 Tolerance Added To Valve Clearance Specifications
1978/01/18 Inner Member Of Caterpillar Coupling Must Be Restrained If The Connection To The Inner Member Is Removed
1978/01/18 Valve Damage Can Be Caused By Short Intervals Of Engine Operation In Very Cold Temperatures
1978/01/18 List Of Service Publications
1978/01/18 Improved Seal Used Between Impeller And Bearings On Water Pump Shaft
1978/01/18 Improved Water Pump Group Now Used
1978/01/18 New Turbine Housings Are The Replacement For Three Former Turbine Housings Used On Schwitzer Turbochargers
1978/01/18 Improved Water Shield For Exhaust Manifold
1978/01/18 Improved Front Pulley And Damper Groups Use New Damper Adapter With Larger Diameter Bolt Circle For Pulley Bolts
1978/01/18 Maintenance Instructions For Coolant Conditioner Elements
1978/02/08 Change In Design Of Engine Governor, Fuel Injection And Transfer Pump Groups, And Fuel Ratio Control Groups
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 Attachment Groups Put Corrosion Inhibitor Directly Into Cooling System
1978/02/08 Complete Set Of Contact Points For Dial Indicators Is Now Available In One Group
1978/02/08 New Water Temperature Regulator Opens At 180 °F (82°C){1350,1355,7304}
1978/02/08 Probable Causes Of Low Fuel Delivery During Testing On Fuel Injection Test Benches
1978/02/08 Oil Strainer (Screen) Added To Turbocharger Thrust Bearing
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 Smaller Quantity Of Oil Now Used In Engine Oil Pan; Prevents Contact Between Crankshaft And Oil
1978/02/08 Stronger Front Support Assembly
1978/02/08 Successful Engine Service-3208 Engine Booklet Is Available
1978/02/08 Design Of Governor Control Linkage Changed; Less Force Is Needed To Move The Accelerator Pedal