New Fuel Injection Lines Used On 3306B (63Z) Truck Engines
Usage:
Description of Change: New fuel injection lines groups are used. The new lines are made from a higher strength steel to withstand the higher injection pressures. The new lines group has an additional support plate between line assemblies (1) and (2). See the chart and illustration for locations.
Adaptable To: The new lines groups are effective with 63Z20293. The changes to the lines groups are listed in the chart. The new parts are direct replacements for the former parts.
Caterpillar Information System:
1991/08/01 Fuel System Parts Information
1991/08/01 Fuel Nozzle Orifice Erosion
1991/08/01 California Laws Target Excessive Smoke
1991/08/01 Service Tips For Cleaning Air-to-air Aftercooling Systems
1991/08/01 Service Tips For Turbocharger Removal And Installation
1991/07/01 Dowel Hole Removed From 8N3946 Governor Housing Improves Service Life
1991/07/01 New Exhaust Manifold Gasket Available
1991/07/01 New Crankshaft Seal Groups Provide Increased Protection From Dirt And Dust
1991/07/01 Full Load Setting (FLS) And Full Torque Setting (FTS) Should Be Correctly Programmed
1991/07/01 New Dual Service Program Module (SPM) Available
1991/07/01 Correct Adjustments And Installation Procedure For Engine Speed Timing Sensor
1991/06/01 List Of Service Publications
1991/08/01 New Water Temperature Regulator (With Internal Vent Valve), Regulator Housing, Pipe, And Gasket In Water Lines Group
1991/08/01 New Hose Used To Connect Turbocharger Compressor Outlet To Air To Air Aftercooler (ATAAC) Inlet Tubing
1991/08/01 Initial Valve Lash Checking Interval Changed
1991/08/01 List Of Service Publications
1991/09/01 Use 7E5888 Fuel Injection Pump Housing As A Service Replacement For Pre 1991 Fuel Injection Pump Housings
1991/09/01 Sintered Bronze Replacement Bushings For Delco-Remy Electric Starting Motors Do Not Require Machining
1991/09/01 Always Use A Digital Voltmeter For Battery Testing
1991/10/01 New Locking Bolt Used In Flywheel Groups
1991/10/01 How To Repair Oil Leaks Between Front Housing And Spacer Deck
1991/10/01 New Components Used In Fuel Injection Pump Groups
1991/10/01 New Teflon Coated 4P9388 Cylinder Seal Available
1991/10/01 7S3161 Valve Lifter Has Three Different Designs