1979/01/22 Caterpillar

New Tachometer Drive Adapter Has Increased Service Life{7462,1288}

Usage:

3304 (2B, 4B ;
3306 (66D);
3306 (23C) Industrial Engines;
3306 (76R) Truck Engines

Description of Change: A new tachometer drive adapter with increased service life, is used on the above engines. The shaft in the new tachometer drive adapter is held in place by a retainer and two thrust washers. The shaft in the former tachometer drive adapter is held in place by a spring-ring which can wear into the shaft bearings and cause damage to the adapter seal. Also a 5P537 Washer has been added between the coupling and the tachometer drive adapter to make sure the coupling is engaged with the drive shaft in the governor.

Adaptable As: The new 9N3018 Tachometer Drive Adapter and 5P537 Washer, used together, are a direct replacement for the former 9N641 Tachometer Drive Adapter. For parts service, the new 9N3018 Tachometer Drive Adapter and 5P537 Washer must be ordered separately.

Caterpillar Information System:

1979/01/22 Current Chart For Dynamometer Adapters{0651,1000}

1979/01/15 6V83 Emery Polishing Paper{0675}

1979/01/15 Removal And Installation Of Taper Type Bearings{0622,1214,1219}

1979/01/15 5P9705 Tapered Rod Tool Group Used For Removal And Installation Of Piston Pin Bearings In Tapered Connecting Rods{0622,1214,1218}

1979/01/08 Improved Woodward Governor Groups{1264,1289}

1979/01/08 New 6V87 Gauge Measures Valve Stem Wear{0653,1105}

1979/01/08 A New 6V29 Sleeve Metering Fuel System Pump Roll Pin Tool Is Used To Adjust And Make A Replacement Of Roll Pins In The Fuel Injection Pump Housing{0626}

1979/01/08 Check The Adjustment Of The Original Tachometer Before A New Tachometer Is Installed{7462}

1979/01/08 Prevention Of Fires On Hydraulic Excavators{7000,5057}

1988/12/26 Remove Fuel From Electronic Control Module (ECM) Before Shipping {1705}

1988/12/26 New Screw Used In BrakeSaver Water Lines Group {1155}

1988/12/26 Check Load Height Before Transporting Machines {7500}

1979/01/22 Ether Starting Aid Groups Are Now Available{1456}

1979/01/29 Fuse And Wire Assembly Is Available For Protection Of Earlier 6N5906 Service Meters{7480}

1979/02/05 Federal Law Prohibits Tampering With Noise Control Systems{0116}

1979/02/05 Stronger Suction Bell Assembly Now Used In Engine Oil Lines Group{1318,1307}

1979/02/05 High Sulfur Fuel Can Cause Severe Engine Wear And Internal Damage{1280}

1979/02/19 Use SIRS To Keep Service Literature Current{0374}

1979/02/19 Use Correct Procedure To Clean The Engine Lubrication System If Permanent Type Antifreeze (Ethylene Glycol) Is In The Engine{1318,1350}

1979/02/19 Modification Of 5P9726 Plug Gauge That Is Used To Check Brake Wear{0653}

1979/02/19 New Exhaust Valve And Valve Guide{1104,1105}

1979/02/19 New Exhaust Pipe Connector Makes A Tighter Seal Between Pipe And Manifold{1061,1059}

1979/02/19 Engine Valve Springs Are Now Made Of Carbon Steel Alloy{1101,1108}

1979/03/05 Main Bearings Now Have Larger Diameter Oil Hole For Better Lubrication Of Main And Rod Bearings{1203,1219,1300}