1999/03/15 Caterpillar


New Tachometer Signal Generator Improves Reliability {7487}

Usage:


D25D (1HK),
D30D (3AJ),
D40D (2JJ),
D300D (5MG),
D350D (9RF),
D350E (9LR),
D400D (8TF),
D400E (2YR) Articulated Trucks;
12G (61M),
14G (96U),
120G (87V),
130G (74V) Motor Graders;
615C (5TF),
621E (6AB),
621F (4SK),
623E (6YF),
627 (54K),
627E (6EB, 7CG),
631C (67M),
631E (1AB1-1445, 1NB, 3ND),
633E (1EB),
637E (1FB),
651E (89Z),
657E (90Z, 91Z) Wheel Tractor Scrapers

Description of Change: A new signal generator, which provides a signal to the tachometer with improved reliability is now available. An improved drive adapter assembly for mounting the signal generator is also available. The new signal generator has internal improvements for improved reliability. The improved drive adapter assembly has its parts number stamped into the aluminum mounting flange. The former version has its part number ink stamped on the flange. The former version also used a snap ring to retain the shaft assembly in the adapter housing. The snap ring was located on the shaft end that drives the signal generator.

Adaptable To: The new 164-5524 Signal Generator is a direct replacement for the former 3E-7299, 9X-8167, and 7T-6945 Signal Generators. The improved 1W-2316-06 Drive Adapter Assembly is a direct replacement for former 1W-2316-01-05 Drive Adapter Assembly versions. Part change levels may not be indicated on the part to reflect the latest version. Manufacturing effectivities of the new signal generator on certain Articulated Truck models are listed in the chart.

Note that installation torque of the 164-5524 Signal Generator onto the 1W-2316-06 Drive Adapter Assembly is 22.6 N·m (16.6 lb ft) maximum.

Caterpillar Information System:

1999/03/15 Special Instruction, SEHS9960, Available For Procedure To Install Three-Point Hitch With Draft Control And Special Instruction, REHS0426, Available For Procedure To Install Draft Control For Use With Aftermarket Three-Point Hitches {7120}
1999/03/15 New Fuel Level Sender Increases Reliability {7481,7483}
1999/03/15 Improved Machine Performance Panel Has Better Visibility And Changes Factory Defaults {7490}
1999/03/08 New 152-8256 (115V) And 154-4853 (220V) Air Conditioning Refrigerant Recovery, Recycling, And Manual Recharging Station For R134A Refrigerant {7320,1809}
1999/03/08 New 150-7762 And 150-7745 (Trailer Mounted) Hot Water Pressure Washers For Cleaning Large Components {0680}
1999/03/08 Use 138-8447 Aerosol Rust Preventative As A Corrosion Inhibitor {0645}
1999/03/08 Use 170-9227 Reamer Shims To Aid In Reaming Engine Injector Sleeves {1254}
1999/03/08 Use 157-3719 Spanner For Removing And Installing Bosch Fuel Pumps {1251}
1999/03/08 Use 151-7537 Adapter Bracket Assembly And 150-3978 Lifting Bracket Assembly As Pod Removal And Installation Tool {6605}
1999/03/08 New Muffler Reduces Cab Noise {1062}
1999/03/08 New Steering Column Bearing Kit Available For Off-Highway Trucks {4310}
1999/03/08 Improved Exhaust Tubes Now Used On Off-Highway Trucks {1061}
1999/03/15 New Diaphragm And Cap Available For Certain Front Brake Oil Cooler Diverter Valves {5737}
1999/03/15 Additional Brake Studs Are Required To Increase Brake Pressure On Certain Off-Highway Trucks {4061,4267}
1999/03/15 Blocks Added To Turbocharger Groups To Prevent Bearing Housing Rotation In Low Pressure Turbochargers {1052}
1999/03/15 New Fuel Priming Pump Assembly Used {1258}
1999/03/15 New Camshaft Cover Seal, Crankshaft Cover Seal, And Valve Cover Seal Help Prevent Oil Leaks {1107,1150,1200}
1999/03/15 Supplement To Correct Final Drive Torque Values {4092,4055}
1999/03/15 New Bolts Available For Rear Axles In High Load Applications {3260,3278}
1999/03/15 Correction To SENR6765 Hub Bolt Torque {5062,5070}
1999/03/15 Grain Elevator Components Are Now Stainless Steel {6931}
1999/03/15 New Top Piston Rings Available {1215}
1999/03/15 Caterpillar Prelub Troubleshooting {1400,1469}
1999/03/22 Improved Duo-Cone Seals Available {4192,7561}
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