1984/05/23 Caterpillar


New Valve Assembly And Seal Used In Fuel Transfer Pump

Usage:


All 3406B Truck Engines

Description of Change: A new valve assembly and seal are now used in the fuel transfer pump group on the above engines. This new valve assembly is stronger and has a larger flow area. This larger area will permit better flow of fuel in cold ambient temperatures. A new seal must be used with the new valve assembly. This seal is made with a new material and is a different thickness.

The 1W5912 Guide and Tappet Assembly shown in the Parts Books for these engines is not correct. The correct part is a 1W5910 Guide and Tappet Assembly.

Adaptable As: The new parts are a direct replacement for the former parts as shown in the chart. The new parts are in effect with 7FB8348.

Caterpillar Information System:

1984/05/23 Dimensions For Reconditioning Cylinder Blocks, Cylinder Heads
1984/04/04 New Aftercooler Hose Clamp Helps Prevent Leaks
1984/04/04 Make Sure There Is Clearance Between Cylinder Head And Fuel Injection Pump Housing When A New Cylinder Head Is Installed
1984/04/04 6V3176 Relief Valve Available For Center Hole Double Acting Hydraulic Cylinders
1984/04/04 Fuel Setting And Air Fuel Ratio Control Adjustment Tools For 3406B Engines
1984/04/04 Remanufactured Undersize Crankshafts Are Available
1984/04/04 Service Tools With Dual Scale (U.S. Standard And Metric) Will Again Be Available
1984/04/04 6V7925 Fuel Rate Indicator Is Available
1984/04/04 Information For Ordering FLEX-HONES And Grit Sizes For Reconditioning Cylinder Liners Or Cylinder Block Bores
1984/04/04 List of Service Publications
1984/04/04 New Adapter Assemblies And Clamps Used To Hold Fuel Nozzles In Position
1984/04/04 Parts Service Engine Information Plate Available
1984/05/23 List Of Service Publications
1984/05/23 Borescope And Light Source Available For Internal Inspection Of Passages On Most Caterpillar Products
1984/05/23 New Recommendation For Oil Hole Location During Installation Of Camshaft Bearings
1984/05/23 New Seal For Fuel Injection Pump Housing Is More Resistant To Heat Damage
1984/05/23 New Oil Filter Base Assembly Used In Filter Base Group
1984/05/23 Remanufactured Oil Pumps Available
1984/05/23 Improved Cylinder Head Gasket
1984/05/23 High Levels Of Soot In The Oil; Make Sure Air Fuel Ratio Control Operates Correctly
1984/05/23 3406 Remanufactured Truck Engines Available
1984/06/27 New Cylinder Head Has Larger Mounting Holes For The Lifting Brackets
1984/06/27 Valve Springs Must Be Removed Before Fuel Injection Nozzle Adapter Assembly Is Removed
1984/06/27 New Adapter Assemblies And Clamps Hold Fuel Nozzles In Position
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