Two Different Piston Oil Ring Designs Used
Usage:
3306, 3406 And 3408 Truck Engines
Two different piston oil ring designs are used in the above engines. The illustration shows the differences in the cross sections of the two designs. An oil ring of either design may be replaced with an oil ring of the other design. Oil rings of both designs may be used in the same engine. Both designs provide similar performance. Both oil ring designs have the same part number.
NOTE: Each oil ring design must be used with the correct spring. The correct spring is provided with each oil ring. Do NOT use the spring from one design oil ring with the other design oil ring.
Cross sections of each oil ring design. November 1985
Caterpillar Information System:
1985/10/01 Fuel Economy Is Often Elusive, But It's Been There All Along
1985/10/01 New Keystone Ring Groove Gauge Available
1985/10/01 New Bleed Screw Used In Fuel Injection Nozzle
1985/10/01 Recommendations For Cooling System And Cold Weather Operation
1985/10/01 Maximum Wear Limits Established For Camshaft Roller Followers
1985/10/01 Two, New Top Dead Center Magnetic Transducers Available
1985/10/01 "Routine" Mid-Life Roll-Ins Of Main And Connecting Rod Bearings No Longer Recommended
1985/10/01 Fuel Transfer Pump Improved
1985/09/01 List Of Service Publications
1985/09/01 New Caterpillar Truck Engine Air Filters (north America)
1985/09/01 Maintenance Management
1985/09/01 Steel Fuel Pump Lifter Used
1985/11/01 Special Bolts Help Prevent Unauthorized Modification Of Fuel System And Governor Settings
1985/11/01 Comparison Of Fuel Timing Tolerances For Field Settings
1985/11/01 Engine Information Plate Contains More Data; Use Of Performance Specifications
1985/11/01 Check Fuel Injection Replacement Pump Installation
1985/11/01 Effects Of Liner Wear In Engines Using Plasma Coated Top Rings
1985/11/01 Tape Tool Marker Is Available
1985/11/01 Use Glycerine On Most O-ring Seals
1985/11/01 Air Regulated Torque Wrench Group Available
1985/11/01 Anti-seize Compound And/or Grease Not To Be Used On Fuel Pump Bonnet Retaining Bushings
1985/11/01 New Retaining Rings Used In Brakesaver Groups
1985/11/01 Caterpillar Offers Remanufactured Turbocharged 3208 Engines At Significant Savings
1985/12/01 Crankshaft Seal Usage On 3400 Series Truck Engines