1990/10/01 Caterpillar

New Temperature Regulators; Regulator Service Hours Changed

Usage:

All Engines

SUPPLEMENT: 12/00/90

Engine News, October 1990, Page 3, "New Temperature Regulators; Regulator Service Hours Changed."

This article applies ONLY to 3400 and 3500 Families of Engines. All other engine families should remain at their current respective service intervals as specified in the Operation and Maintenance Manual.

--------------- END SUPPLEMENT ---------------

The recommended service hours of temperature regulators have changed to every 6000 service meter hours or annually, which ever occurs first. Also, new oil temperature regulators are available.

NOTE: The 3600 Family of engines has three sets of temperature regulators. The regulators control water outlet temperature, water inlet temperature and oil temperature.

Charts A and B identify all of the temperature regulators available.

Caterpillar Information System:

1990/10/01 New Exhaust Valves Are Used In Caterpillar Remanufactured Cylinder Heads

1990/10/01 New 4C6090 Multichannel Temperature Selector Available To Aid In Diagnosing Low Power Complaints

1990/10/01 Correct Light Bulb Replacement For The 8T9290 Borescope; New Light Bulb Used

1990/10/01 4C6600 Battery Voltmeter For Determining Battery Percent Of Charge

1990/09/01 Improved Air Motor Lubricator Group

1990/09/01 Improved Water Line Clamps

1990/09/01 New Oil Temperature Regulator Used In Oil Cooler Lines Groups

1990/09/01 New Oil Temperature Regulators Used In Oil Cooler Lines Groups

1990/09/01 Oil Level Gauge Assembly (Dipstick) Guide Tube Length And Gauge Markings May Produce Erratic Oil Level Readings

1990/09/01 Be Sure To Operate Prelube Pump When Engine Is Rotated With Barring Group

1990/09/01 New Bearings And Identification Used In Engine Oil Pump Group

1990/09/01 Improved Actuator Assemblies Used

1990/10/01 Sealing Threads On Switches And Sensors That Are Grounded Through The Case

1990/10/01 Improved 3T2357 Horn Switch, 3T3453 Starting Aid Switch, 3T3947 Start Switch, 3T8514 Test Switch Assemblies

1990/10/01 Engine Service Training Literature Uses New Form Number

1990/10/01 List of Service Publications

1990/10/01 Serviced Parts Available For 8C4773 Electric Starting Motor Group

1990/10/01 Additional Clip And Hardware Prevent Damage To Fuel Line Of 4W6887 Instrument Panel

1990/10/01 New "On Engine" Adjustment Procedure For 3161 Woodward Governor

1990/10/01 Add Bolt Dampers To Oil Pump Mounting Bolts To Prevent Bolt Failures

1990/10/01 New Pump Group With Bolt Dampers Used In Oil Pump Group

1990/10/01 Engine Commissioning And Diagnostic Kit

1990/10/01 New Air Shutoff Groups Prevent Air Leaks And Wear

1990/10/01 Increased Tension Applied To Cylinder Head Studs