1981/04/09 Caterpillar

Two New Oil Filter Assemblies Available; Always Use Correct Oil Filter And Follow Caterpillar Change Intervals


1140, 1145, 1150, 1160 And 3208 Truck Engines

Description of Change: Two new oil filter assemblies are used in the lubrication systems for the above truck engines. One filter has an internal bypass valve, and the other does not.

The filter with the bypass valve is used on earlier engines that have oil filter bases without internal bypass valves. The filters without bypass valves are used on engines which have later oil filter bases with bypass valves.

The filters are of common construction, except for the bypass valve. See the Illustration.

The two types of filters can not be used in place of each other.

Comparison of the 9N5680 and 8N9586 Filter Assemblies.

It is important to use the correct oil filter for the engine and to follow the correct change interval.

Products of combustion (foreign material), like carbon, get into the engine oil during operation. This foreign material is held in suspension in the oil until it is removed by the filter.

If the filter element becomes too "dirty" (full of foreign material) because of use, the bypass valve will open. This permits dirty oil to flow through the engine, but not through the filter. Extended use of dirty oil will cause piston rings and valves to stick (not move freely) and increased cylinder liner wear.

Adaptable As: The 9N5680 and 8N9586 Filter Assemblies are direct replacements for the former 9L9200 and 9N5570 Filter Assemblies, respectively. The 9L9200 Filter Assembly is canceled. The 9N5570 Filter Assembly is still available. The 9N5680 Filter Assembly has an internal bypass valve. It is used with earlier bases that do not have bypass valves. The 8N9586 Filter Assembly does not have an internal bypass valve. It is used on later filter bases which have bypass valves.

The chart shows the applications of both the 9N5680 and the 8N9586 Filter Assemblies. It also shows all other filter assemblies and bases for 1140,1145, 1150, 1160 and 3208 Truck Engines.

Caterpillar Information System:

1981/04/09 Special Studs And Nuts Available For Exhaust Manifolds On Engines Used In Heavy Load Conditions
1981/04/09 Correction To Torque Specification For Locknuts On Valve Clearance Adjustment Screws Of Engines Equipped With Jacobs Engine Brakes
1981/04/09 6V4163 Bit And 6V4164 Driver Now Available For Removal Of Bolts For Flyweight Carrier
1981/04/09 Low Engine Temperatures: Install Check Valve
1981/03/06 New Governor Spring Available For Specific Engine Applications
1981/03/06 New O-ring Seal Used In Egr (exhaust Gas Recirculation) Control Has Better Resistance To Heat Damage
1981/03/06 Check Oil Level Carefully To Prevent Operation With Too Much Oil In Engine Crankcase
1981/03/06 Two New Exhaust Manifolds Available For Replacement Of Single Rear Manifold To Prevent Broken Studs
1981/03/06 Do Not Adjust The Fuel Setting Or High Idle Higher Than Necessary
1981/03/06 Modification Of Flywheel Prevents Loose Clutch Pilot Bearing
1981/03/06 Later Pistons Have A Smaller Number Of Drain Holes In Oil Ring Groove
1981/03/06 New Turbocharger, Turbocharger Oil Lines Group And Aftercooler Air Lines Group Used
1981/04/09 Cooling System Cleaner Removes Rust And Corrosion
1981/04/09 Correct Refill Capacity For Engine Oil
1981/04/09 6V3197 Spacer, 6V3041 Tool Group Available For Use During Removal And Installation Of Piston Pin Bearings
1981/04/09 Clean Electrical Contacts In Exhaust Gas Recirculation (e.g.r.) Switch Group And Cover Assembly Before Installation
1981/04/09 Electrical Information For Egr (exhaust Gas Recirculation) Systems On 3208 Truck Engines So Equipped
1981/04/09 Improve Use Of Engine Service Manual Microfiche
1981/04/09 List Of Service Publications
1981/04/09 Check All Settings When Fuel Injection Pump Group Is Installed
1981/04/09 Use 6V4058 Universal Extension To Remove And Install Starter Bolts
1981/04/09 Fuel Pressure Relief Valve Is Shown Inverted (wrong End Up) In Parts Book Illustrations
1981/04/09 6V3150 Engine Pressure Group Gives Direct Indication Of Manifold Pressure
1981/05/12 Crankshaft Failures; New Thrust Plate
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