New Fuel Nozzle Adapter Assembly Used
Usage:
All 3406, 3408 And 3412 D.I. Engines
Description of Change: New fuel nozzle adapter assemblies are used in the cylinder head groups on the above engines. The new adapter assemblies are made of a different steel alloy that will give a longer service life.
The former adapter assemblies have had crack failures. The former adapters were made of a lead steel alloy. Indications are that the lead in the steel caused the cracks.
Adaptable As: The new 1W7884 and 1W7885 Fuel Valve Adapter Assemblies are direct replacements for the former 9N5431 and 8N9457 Adapter Assemblies respectively. The former adapters have been canceled.
The new parts are in effect with the Serial Numbers shown in the chart.
Caterpillar Information System:
1982/02/24 New Camshaft Has Improved Profile (Shape) Of Exhaust Cams
1982/02/24 New Engine Testing And Adjusting Tools Give More Accuracy And Longer Service Life
1982/02/24 List Of Service Publications
1982/02/24 "SIRS User Instructions" Available
1982/02/10 New Flywheel Assemblies Used
1982/02/10 Gasket Kits
1982/02/10 New Crankshaft Seal Group Has Assembled Rear Seal And Wear Sleeve
1982/02/10 Bent Lever For Fuel Shut-Off Solenoid Can Cause Low Engine Performance
1982/02/10 New Parts Used In Hydramechanical Shut Off; Prefill Oil Pump
1982/02/10 New Piston Pin Retainer Used
1982/02/10 New Washers Permit Locks To Hold Better
1982/02/10 The Service Publications Information Feedback System
1982/02/24 Engine Storage; Engine Start-Up After Storage
1982/02/24 New Main Bearings And Connecting Rod Bearings Have Thicker Layer Of Surface Material
1982/02/24 New Poppet Valve Will Decrease Chatter
1982/02/24 New Inlet And Exhaust Valves And Exhaust Inserts Available
1982/02/24 New Idler Shaft Used In Fuel Transfer Pumps
1982/02/24 Use 6V6035 Hardness Tester On Crankshafts
1982/02/24 Use The Correct Governor For Parallel Applications
1982/03/17 New Diaphragm Used In Fuel Ratio Control
1982/03/17 New Adapters And O-Ring Seals Used In Aftercooler Group
1982/03/17 Correct Lubrication Procedure Will Prevent Damage To Fan Drive
1982/03/17 New Gasket Used In Governor And Fuel Injection Pump Group
1982/03/17 Improved Bearing Used In Rear Power Takeoff Groups