1981/12/14 Caterpillar

New Cylinder Liners And O-Ring Seals Give Longer Seal Life{1216,1201,1213,1227}

Usage:

3406, 3408, 3412 Engines In All Applications

Description of Change: New cylinder liners and O-ring seals are used in the above engines. The new liner has narrower and deeper seal grooves than the former liner, and the new seal has a larger inside diameter with a smaller cross-section diameter than the former seal. These changes lower the tension and the compression stress in the rubber when the seal is installed, and will extend the service life of the seal.

Adaptable As: Direct replacement. The new 1W6280 Cylinder Liner is used in place of the former 7N943 Cylinder Liner, which is canceled, and the new 6V5121 O-Ring Seal is used in place of the former 2N6210 O-Ring Seal. It is not necessary to use the new parts together; the new liner and seal can each be used with the other former part in all earlier engines.

Caterpillar Information System:

1981/12/14 New Springs For Timing Advance Used In Governor And Fuel Pump Drive Group{1272,1288}

1981/12/14 How To Remove The 7L4511 Sleeve Assembly From Aftercoolers{0620,1063}

1981/12/14 New Oil Level Gauge Used To Prevent Vibration{1300,1318,7450}

1981/12/14 New Flywheel Housing Gasket Used{1201,1157}

1981/12/14 6V4111 Adapters Available To Pull Spoke-Type Sprockets{4164,0623}

1981/12/14 Make Sure Coolant Conditioner Elements Are Changed At Correct Intervals{1350}

1981/12/14 New Valve Seat Used In Shift Pressure Valve Group{3152,3167}

1981/12/07 New Inlet Lines Used In Radiator Group{1353,1380}

1981/12/07 New Air Cleaner Group Has Six Clamps For Improved Seal{1051}

1981/12/07 6V4175 Socket Available For Worn Track Bolts{0612,4179}

1981/12/07 New Core Assembly Used In Transmission Oil Cooler Group{1375}

1981/12/07 Increased Lubrication For Transmission Planetary Gears{3154,3176}

1981/12/21 Shorter Bolt Gives Clearance For Wiper Motor Linkage{7305,7300}

1981/12/21 Use Of A Flex-Hone For Cylinder Liner Reconditioning{0664,0674,1216}

1982/01/11 Check 14 Test Points In Less Than 5 Minutes With The 6V2150 Starting/Charging Analyzer Group{0651,1518,1406}

1982/01/11 Improved Head Gasket Has Larger Fire Ring To Decrease Fretting{1101,1201}

1982/01/11 Procedure Reduces Possibility Of Spraying Hot Hydraulic Oil When S.O.S. Sample Is Taken{0372,5068}

1982/01/11 "Sirs User Instructions" Available{0374}

1982/01/11 Use FT1555 Generator Rotor Removal Tool To Remove And Install Rotor Assembly{0626,0644,0665,4457}

1982/01/18 New Lever And Improved Link Used To Permit Full Movement Of Articulation Indicator{7476}

1982/01/18 New Adjustment Dimension For Master Cylinder Rod{4111}

1982/01/18 Coasting While In Neutral Causes Transmission Damage{3150,3176}

1982/01/18 Communicate With Photography{0336,7750}

1982/01/18 Piston And Connecting Rod Assembly Storage Cabinet{0600}