1978/08/28 Caterpillar


New Design Seals Decrease Shaft Wear In Fuel Transfer Pump{1256}

Usage:


3406 Industrial, Marine and Truck Engines;
16G Motor Graders;
245 Excavators;
621B and 623B Tractors

Description of Change: New design seals are now used in the fuel transfer pump for the above models. The new seals put a more even radial load on the transfer pump shaft and will give a small amount of lubrication. As a result, the shaft does not become too dry and wear.

Adaptable As: Direct replacement as shown in the chart that follows:


Location of new seals.

Caterpillar Information System:

1978/08/28 Change In Procedure To Check Main Bearing Clearance{1203}
1978/08/28 A New Ram Support For Use With The Field Service Hose Press{0623}
1978/08/28 Tips For Service Information Retrieval System (SIRS) Users{0374}
1978/08/21 Improved Piston Pins Are Made Of Different Material For Better Hardness Characteristics When Heat Treated{1214}
1978/08/21 Improved Guide Pin For Fuel Injection Pump Lifters{1251}
1978/08/21 Sleeve-Type Ring Compressors Can Be Used For Installation Of Pistons From The Bottom Of The Engine{0622}
1978/08/21 Overlap Joint On Crankshaft Front Seal Ring Prevents Leakage{1160,1202}
1978/08/21 Take Advantage Of The Assembly Procedures And Specifications Charts{0374}
1978/08/07 Remove Fuel Injection Nozzles Before The Bottom Surface Of A Cylinder Head Is Cleaned{1254,1101}
1978/08/07 New Glow Plug Wiring Harness Prevents Short Circuit{1403}
1978/08/07 Four New Contact Points Added To 5P6524 Engine Timing Indicator Group{0653}
1978/07/10 Drill Hole In Handle Of Early 5P3520 Spanner Wrenches For Use With 5P8675 Extension Handle{0620}
1978/08/28 New 5P8744 Adapter Assembly And Special Instruction Procedures For 5P4150 Nozzle Tester Group{0650}
1978/08/28 New Oil Supply Line And Gasket For Turbocharger{1307,1052}
1978/08/28 Different O-Ring Seals Now Used In Fuel Injection Pump Group{1251}
1978/09/04 New Camshaft Rear Bearing For The Sleeve Metering Fuel System{1253}
1978/09/04 New Vent Tube For Water Cooled Turbocharger{1380,1052}
1978/09/04 New Torque Specification Used On Bolts That Hold The Cylinder Head{1101}
1978/09/04 Correct Procedure To Adjust Front Power Takeoff Clutches{3055}
1978/09/04 New Gasket Used In Exhaust Manifold Group{1059}
1978/09/04 New Nozzle Assembly Used In Fuel Injection Valves{1254}
1978/09/04 New Water Pump Gives More Pressure{1361}
1978/09/11 New Drive Adapters For Fuel Injection Test Bench{0650}
1978/09/11 New Diaphragm Used In Mechanical Shut-Off Groups Has Identification For Correct Installation{7418}
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