New Cylinder Liner Has Improved Design To Keep Liner Temperatures Lower{1216}
Usage:
594 Pipelayers;
D9H and DD9H Tractors;
D353, D379, D398 and D399 Industrial and Marine Engines;
G379, G398 and G399 Natural Gas Engines
Description of Change: A new cylinder liner with an improved design is used in the above models. The new liner has a groove which is 1.35" (34.4 mm) wide and .050" (1.27 mm) deep in a location approximately one half inch (12.7 mm) below the top flange.
The groove permits a better flow of coolant around the upper part of the liner. The result is lower maximum temperatures of the liner during engine operation.
Adaptable As: The 8N9174 Cylinder Liner is a direct replacement for the former 7N5681 Cylinder Liner, which is canceled.
Caterpillar Information System:
1980/01/28 Oil Drain Hole Added To Spacer Plate Cylinder Block To Permit Use Of Scroll Fuel System{1201,1221}
1980/01/28 Installation Procedures For 5N5880 Remote Shut-Off Group And 5N6336 Oil Pressure Indicator Gauge Group{7418,7403,7455}
1980/01/28 Correct Planet Gear Bearings Must Be Used For Parts Service Of Transmission Gear Trains{3176}
1980/01/28 Different Seal For Control Shaft In Power Control Box{5201}
1980/01/28 Reinforcement Plates Can Be Added To Make The Fuel Tank Stronger{1273}
1980/01/28 New 6V199 Socket For Use On Fasteners In Areas With Limited Clearance{0612}
1980/01/28 Radiator Fan Blades Can Be Damaged If They Come In Contact With Large Quantities Of Water{1356}
1980/01/28 New Cross-Over Steering Relief Valve Used{4322}
1980/01/21 New Fuel Injection Nozzle Assembly Used{1254}
1980/01/21 New Rock Ejectors Have Reinforcement Plates On Both Sides For Increased Strength; Ejector Mounting Bracket Changed On 777 Trucks{7157}
1980/01/21 Spacers Must Be Removed Before Finish Welds Are Made During Assembly Of Truck Body; Revision To Special Instruction{7258,7500}
1980/01/21 New Piston Groups Have The Piston Pin Bore Off-Center, Away From The Thrust Side Of The Piston{1214}
1980/02/04 Change To Gear On Accessory Drive Shaft Assembly Gives Longer Service Life{1207,1206}
1980/02/04 Real Value Available Through Caterpillar Remanufacturing Programs{0374}
1980/02/04 New Bonnet Used On Transmission Oil Cooler; Bracket Holds Bonnet To Oil Pan{1375,1302}
1980/02/04 Shock Absorber Now Used In Belt Tightener Group{1358}
1980/02/04 New Turbocharger Group Has A Water-Cooled Bearing Housing{1052,1053,1073,1380,1307}
1980/02/04 Different Nuts Now Used To Adjust Preload On Bearings For Differential And Bevel Gears{3258,3256,3257}
1980/02/11 Warning: Avoid Use Of Fuel Mixtures Of High Volatility. If You Are Exposed To Such Mixtures, Be Aware Of The Hazards Involved And Take Proper Precautions{1280}
1980/02/11 New Bearing Retainer Plate Is Used In Carrier Rollers{4154}
1980/02/11 New Gasket Gives A Better Seal Between The Flywheel Housing And Cylinder Block{1157,1201}
1980/02/11 Use The Correct Water Temperature Contactor{1350,1100}
1980/02/11 Improved Wheel Assembly (Stator) Used In Torque Converters{3101}
1980/02/11 New Bypass Valve Used In Oil Filters{3179,5068,3004}