1984/05/14 Caterpillar

New Valve Assembly And Seal Used In Fuel Transfer Pump{1256}

Usage:

All 3406B Engines;
980C Loaders, 627B Scrapers, 824C Tractors, 825C And 826C Compactors Equipped With New Scroll Fuel System And 1W1700 Fuel Transfer Pump Group

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 Tapper 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 Chart A. The new parts are in effect as shown in Chart B.

Caterpillar Information System:

1984/05/14 New Seal For Fuel Injection Pump Housing Is More Resistant To Heat Damage{1253}

1984/05/14 New Speed Setting Motor Assembly On Woodward PSG Governor Has More Resistance To Moisture And Vibration Damage{1264}

1984/05/14 Gasket Changed For Cylinder Block Side Cover{1201,1362}

1984/05/07 New Recommendation For Oil Hole Location During Installation Of Camshaft Bearings{1211}

1984/05/07 Install Muffler With Drain Hole Down{1062}

1984/05/07 New Hoses In Water Lines Group Give Better Performance At Higher Temperatures; New Hose Clamps Also Used{1050,1059,1350}

1984/04/23 Correct Oil Level And End Play Settings For Marine Transmission{3303,3305,3354}

1984/04/23 Only The External Needle Valve Can Be Adjusted On Woodward EG3P or EG10P Actuators{1265,1289}

1984/04/23 Dimensions For Reconditioning Cylinder Blocks, Cylinder Heads{1201,1101,1103,1105}

1984/04/23 Repair Of Drain Plug Threads In Oil Pan{1302}

1984/04/23 3406 Remanufactured Truck Engines Available{1000}

1984/04/16 Piston For Rectangular Rings Available Again{1214,1215}

1984/05/14 Vehicle Electrical System Can Have Power When The Disconnect Switch Is In The Off Positon{0353,1400}

1984/05/21 Improved Cylinder Head Gasket{1101,1201}

1984/05/21 Borescope And Light Source Available For Internal Inspection Of Passages On Most Caterpillar Products{0600,0690}

1984/05/21 Improved Valve Used In Air Starting Lines Groups{1451}

1984/05/21 New Pulley Group With Tapered Bearings{1358}

1984/05/21 Quadrants Improved In Governor Control Groups{1265,1264}

1984/05/21 Different Thread Lubricant Can Be Used On Connecting Rod And Counterweight Bolts{1202,1218}

1984/06/04 Reusability Of Brake Pads{4273,4255}

1984/06/04 Drain Line Added To Reduce Pressure In BrakeSaver Housing{1155}

1984/06/04 Salvaging Cylinder Block Top Decks After Liner Seat Erosion{1201,1216,1217}

1984/06/04 FT1818 Track Link Grinding Stand And FT1844 Track Pin Grinding Attachment Available{0664,0665,4169,4171,4174,4175}

1984/06/04 Information Concerning Caterpillar XT Hose{7554}