New Hydromechanical Shut-Off Is Available
Usage:
D379, D398 and D399 Industrial Engines
Description of Change: A new hydromechanical shut-off is used on D379, D398 and D399 Industrial Engines. This shut-off gives protection from damage caused by low oil pressure, high coolant temperature and too high engine rpm. Sometimes, control cable failures in the former mechanical shut-offs prevented engine shutdown. The new hydromechanical shut-off is equipped with an oil pump to give the necessary oil pressure for a rack shut-off and an air inlet shut-off.
Adaptable To: Earlier engines as shown in the chart which follows. See Special Instruction SMHS7434. Information about operation, specifications and troubleshooting is available in the D379, D398 and D399 Service Manual Form No. SEBR0511.
Caterpillar Information System:
1979/10/03 New Aftercooler Core Has Stronger Construction And Corrosion Resistance
1979/10/03 Recommendation For Use Of A FLEX-HONE On 1100, 3100 and 3200 Series Engines
1979/10/03 Tips For SIRS (Service Information Retrieval System) Users
1979/10/03 List Of Service Publications
1979/10/03 Different Mounting Hole Locations In Ring Gear Plate Assembly And Rotor Assembly For BrakeSaver
1979/10/03 Steel Plates Are Now Used To Hold The Element In Position In The Panel-Type Air Cleaner Housing Assembly
1979/10/03 Quick Disconnect Coupling On Optional Modification Of 5P4150 Nozzle Tester Permits Faster Exchange Of Adapters
1979/09/19 6V2055 High Vacuum Grease Gives Better Oil Seal
1979/09/19 Improved Sea Water Pump Now Used
1979/09/19 New Liner Seat Inserts For Spacer Plate Cylinder Blocks Are Made Of Stainless Steel
1979/09/19 Stronger Bolt Now Used With Exhaust Manifold
1979/09/19 Raw Water Pump Improved
1979/10/24 Cold Temperature Starting Procedures For Air Compressor And Drill Engines
1979/10/24 New Camshaft Housing Gasket Has Increased Resistance To High Temperature
1979/10/24 Improved Seal Used In Raw Water Pump On Marine Engines
1979/10/24 Engine Oil Viscosity Changed To SAE 10W/30 For Shipment From All U.S. FActories
1979/10/24 New Coolant Temperature Regulator Housing And Vent Line Valve Give Better Control Of Engine Cooling; Conversion Kits Available.
1979/10/24 7N9843 Fuel Injection Valve Nozzle Assembly Now Used In Truck Engines
1979/10/31 Improved Seal Now Used In Seawater Pump
1979/10/31 Use The 6V2034 Micrometer Adapter To Measure Lip Thickness Of Engine Valves
1979/10/31 Support Plates Must Be Used To Install Earlier Marine Transmissions
1979/10/31 Different Thrust Bearing And Thrust Rings Now Used In Turbochargers
1979/10/31 New-3208 Engine Maintenance Tips Wall Chart
1979/10/31 Wider Connecting Rods Have More Bearing Area