1979/05/09 Caterpillar

Change In Part Number Of Water Temperature Regulator Used In Attachment Oil Cooler Groups

Usage:

D398, D399 Industrial Engines

Description of Change: A different part number is now used for the water temperature regulator in attachment oil cooler groups for D398 and D399 Industrial Engines. The regulator specifications are not changed; but the former part number regulator was made by either of two different manufacturers (factories). While the specifications were the same, the two different products had different characteristics of operation, and tests showed that one regulator held a more even temperature in the oil cooler than the other. For this reason, a new part number is released for regulators made by a single manufacturer. This regulator will prevent stresses caused by temperature changes in the oil cooler, and will extend the service life of the oil cooler.

Adaptable As: The new 5N6242 Water Temperature Regulator is a direct replacement for the former 9S9160 Water Temperature Regulator in attachment 3N9189 and 3N9378 Engine Oil Cooler Groups (Sea Water). The former 9S9160 Water Temperature Regulator is still available for use in other applications.

Caterpillar Information System:

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1979/05/09 List Of Service Publications

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1979/05/09 New " Drive 6V94 Universal Joint Is Available

1979/05/09 Improved Gasket Now Used Between The Flywheel Housing And The Cylinder Block

1979/05/09 New Ring Gears Used In Flywheel Assemblies

1979/04/25 Stronger Output Shaft Now Used In 2N3909 Tachometer Drive Adapter

1979/04/25 During Installation Of Crankshaft Piston Ring Seals, Put Silicone Grease In The Groove And On The Seal

1979/04/25 Dowtherm Test Strips No Longer Available

1979/05/09 New BrakeSaver Manifold Prevents Oil Leakage

1979/05/23 New 6V116 Water Sleeve Removal Tool Is Available

1979/05/23 New Flywheel Housing Corrects Clearance Problem With Cylinder Block

1979/05/23 New Hose Assembly Will Give Longer Service Life With High Oil Temperatures

1979/05/23 5P3519 Piston Ring Gauge Has Improved Design For Better Accuracy And Easier Use; Corrected Information For Use On Pistons That Have Two Ring Grooves

1979/05/23 How To Prevent Cylinder Block Failure From Cracks

1979/05/23 Do Not Use Later 9N3979 Nozzle Assemblies In Place Of Earlier Nozzle Assemblies

1979/05/23 Shorter Mounting Bolts Used For Glow Plug Wiring

1979/05/23 An Ammeter Calibration Group Is Now Available

1979/05/23 New Filler Bands Give A Better Seal Between The Cylinder Liners And Cylinder Block

1979/05/23 Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure

1979/06/06 A New Method To Clean And Polish Engine Valve Stems