1992/02/10 Caterpillar

Light Green Gasket Material On Secondary Air Filter Elements May Stick To Filter Housing{1054,1051}

Usage:

3200, 3300, 3400 Families Of Engines

Reference: Service Magazine; September 30, 1991; Page 13; "Air Filter Maintenance".

The light green gasket material on the secondary air filter elements may stick to the filter housing when the secondary filter is removed.

NOTE: Be sure to check the area where the secondary air filter gasket contacts the filter housing for stuck and/or torn gasket material. This area must be clean and free of gasket material to prevent an air leak path past the secondary air filter.

When installing a new secondary air filter element with a light green gasket (date coded MAR88 through DEC91), put a light coat of 1U6396 O-ring Assembly Compound on the face of the light green gasket. This will help prevent the gasket material from sticking to the filter housing.

Most secondary air filter elements date coded JAN92 and later have light gray gasket material. This new gasket material will help prevent the gasket from sticking to the filter housing. Some secondary air filter elements date coded JAN92 and later may still have the light green gasket material, but these gaslets have an improved antisick coating. All secondary air filter elements date coated JAN92 and later DO NOT require the coat of 1U6396 O-ring Assembly Compound at assembly.

NOTE: Tighten the retaining nuts for the secondary air filter element to a torque of 27 ± 4 N·m (20 ± 3 lb ft).

Caterpillar Information System:

1992/02/10 The Letter "I" Now Used In Part Numbers{0374}

1992/02/03 Many Commercial Folded Core Radiators Can Be Converted To Multiple Row Module Radiators{1353}

1992/02/03 New Oil Filler Tube Assembly Helps Prevent Cracking{1316}

1992/02/03 Oil Capacity Increased{1302,1326}

1992/02/03 New Cast Iron Valve Rocker Arm Groups Provide Improved Bearing Retention{1123}

1992/02/03 5P7437 Adapter (Part Of 8T5301 Diesel Timing Adapter Group) Must Be Modified To Work On Current Fuel Lines.{0782}

1992/02/03 Master Bolts Have Been Removed from the Parts Consist List for Link Assemblies{4171}

1992/02/03 Improved Exhaust Manifold Group Eliminate Stud Breakage And Exhaust Leakage{1059}

1992/01/20 The Letter "I" Now Used In Part Numbers{0374}

1992/01/20 Engine Wiring Schematic Wall Charts Available{0374}

1992/01/20 New Painting Procedure For SR4 Generators{4450}

1992/01/20 Procedure To Check 7C2700 Voltage Control Module{4450,4467}

1992/02/17 New 100 Amp Alternators Available For Applications With Large Electrical Requirements{1405}

1992/02/17 New Cylinder Head Gasket Used{1124,1100,1101}

1992/02/17 New Fuel Line Assemblies And Adapter Assembly Used{1252}

1992/02/24 1P8116 O-Ring Seal Available To Service Unit Injectors{1290}

1992/02/24 Be Sure To Use Correct Connector/Connectors Between Fuel Transfer Pump Outlet And Tube To Fuel Filter{1274,1256}

1992/03/02 Procedure To Repair Oil Leak At Rear Camshaft Cover{1221}

1992/03/02 New Combustion Seal (O-Ring Seal) Used In Unit Injection Pump Group{1290}

1992/03/02 Fuse Blocks Have Been Improved And Are Now Serviced{4450}

1992/03/09 New Hose In Turbocharger Oil Lines Group Resists Deterioration Caused By Heat {1307}

1992/03/23 Unit Injector Test Specifications Have Been Updated {0374,1290}

1992/03/23 Troubleshooting Electrical Noise Problems {1900}

1992/03/23 New Electronic Control Groups (Rack Position Sensor And Timing Position Sensor) Provide Increased Reliability {1905,1911}