1980/10/20 Caterpillar

New Basic Oil Pump Groups Use Hardened Gears For Longer Service Life{1304}

Usage:

D379, G379, D398, G398 Engines

SUPPLEMENT: 12/01/80

SERVICE MAGAZINE, OCTOBER 20, 1980, PAGE 2. In the article "New Basic Oil Pump Groups Use Hardened Gears For Longer Service Life", engine serial numbers are now available when the new parts were put in effect at the factory. Add the serial numbers that follow to the article.

--------------- END SUPPLEMENT ---------------

Description of Change: New basic pump groups are used in engine oil pumps for the above model engines. The new basic groups use new shaft assemblies and new idler gear assemblies with hardened gears. The new harder gears will have better resistance to wear than the former gears, and longer service life is expected.

Adaptable As: Each of the new basic oil pump groups is a direct replacement for the former pump group or assembly, which is canceled. Also, each of the new gear assemblies and shaft assemblies is a direct replacement for the respective former part, and all the former parts are canceled. Since only the shaft assembly and gear assemblies are changed, installation of these new parts will change a former basic pump group or assembly to the new group. While each of the new parts is a direct replacement for the former part, the recommendation is to use the new shaft assembly and two idler gear assemblies together in the same pump.

Caterpillar Information System:

1980/10/13 Understand The Effects Of Extended Oil And Filter Change Intervals{0375}

1980/10/13 Improved Temperature Control Switch Used On Machines Equipped With Air Conditioner Units{7320}

1980/10/13 6V3116 Adapter Group Is Available For Use On Fuel Injection Test Bench{0652,1251}

1980/10/13 New Tools Available For Installation Of Crankshaft Seals And Wear Sleeves{0622,1160,1161}

1980/10/13 6V2156 And 6V2157 Link Brackets Now Available To Lift Heavy Loads{0644}

1980/10/13 6V3184 Brush Group Available To Clean Crankshaft Oil Passages{0622,1202}

1980/10/06 New Breather Groups Used{1317}

1980/10/06 New Timing Advance Weight Used{1272,1288,1286,1264}

1980/10/06 Fretting Material Must Be Removed Before Installation Of New Bearings{1202,1203,1218,1219,1201,1230}

1980/09/29 Use Starter To Turn Crankshaft For 30 Seconds Or Until Oil Pressure Gauge Shows Pressure, Before Engine Is Started{1300,1450}

1980/09/29 Some Test Procedures And Specifications Changed For 9L6884 Fuel Injection Nozzle Assemblies{1254,0651}

1980/09/29 Woodward 2301 Speed Control (8N1731 Speed Control Group) Can Be Adapted For Use As Field Test Instrument{0651,1264,1265,1289}

1980/10/20 List Of Correct Fuel Injection Nozzle Assemblies To Use For Different Engine Applications{1254}

1980/10/20 Pressure Relief Fitting Added To Fan Drive Hub For More Positive Lubrication Of Front Bearing{1359}

1980/10/20 Crankshaft Now Has A Fillet Radius At Front Main Bearing Journal{1202}

1980/10/20 Before You Use Any Service Publication, Make Sure It's Current{0374}

1980/10/27 A Group Of Special Instructions On The Subject Of Alignment Is Currently Available{0374,1000}

1980/10/27 5P9733 Adapter Group Is Available To Test Hydramechanical Shut-Off Groups{7418,7403,7407,7410}

1980/10/27 Take A Little Time: Check The "Supplements" Section Regularly For Important Information About Existing Publications{0374}

1980/11/03 Kysor Air-Operated Shutdown Actuators For 3406, 3408, 1693 Truck Engines{7400,1265}

1980/11/03 Modification Of Puller Bolt Prevents Thread Damage During Removal Of Sleeve From Sleeve Metering Fuel System{0621,1251,1253}

1980/11/03 Check Valve Added To Hydramechanical Shut-Off{7418,1286,1307}

1980/11/03 Pulley With Keyway Can Be Used When Replacement Alternator Is Installed{1405}

1980/11/03 FT1514 Lubrication Manifold Permits Lubricant To Be Added To The Output Shaft Bearings Without Removal Of Rear Cover From Fuel Injection Test Bench{0652}