1983/09/26 Caterpillar

Oil Shield And Rotocoil Must Be Installed Together For Acceptable Oil Control{1109}

Usage:

All 3304, 3306 Engines, Excluding Natural Gas Engines

The rotocoil assembly (valve rotator) used in the above engines is made of a rotocoil assembly and an oil shield. To give acceptable oil control, both the oil shield and the rotocoil assembly must be installed together as a unit; the shield fits into the bottom of the rotocoil assembly.

There have been reports from the field that some servicemen have installed these components separately. The oil shields were installed below the valve springs while the rotocoil assemblies were installed above the springs. The result was a loss of oil control.

The "3306 Diesel Truck Engine Service Manual," Form SEBR0545, shows the rotocoil assembly and the shield installed separately. This is not correct. Make a note in this Service Manual to install the rotocoil assembly and the oil shield together, and make a reference to this article.

Also, make a reference to this article next to the installation procedure for valves in the Service Manuals for the above engines.

Caterpillar Information System:

1983/09/12 Parts Service Information For Pistons, Connecting Rods, Piston Pins And Rings{1214,1225,1215,1218}

1983/09/12 New Dust Covers Available For Twin Disc IBF318 And IBF321 Rear Power Take-Off Clutches{3055}

1983/09/12 New Larger Auxiliary Sea Water Pump Operates At Lower RPM{1371}

1983/09/05 Engine Maintenance Information Films Available{1318,1352,0375}

1983/09/05 Vent Hole In Water Temperature Regulator Cover Removed{1355}

1983/09/05 6V3100 Engine Timing Indicator Group May Have 6V9710 Or 6V2192 Transducer{0651}

1983/09/05 New Piston Oil Rings{1215}

1983/09/05 Larger Oil Pump Used To Give Better Clutch Cooling And Bearing Lubrication{3310,3302,3307}

1983/09/05 Replacement Counterweights And Information For Replacement Of Counterweights And Balancing The Crankshaft{1202,0652}

1983/09/05 Service Information Available For Altronic Ignition System{1552}

1983/09/05 New Inspection Report Forms Available{0336,0372,7550}

1983/08/22 New Governor Drive Gears And Weight Assemblies{1264}

1983/09/26 Service Information For Woodward Governors{0374,1264}

1983/09/26 New Bearing Used On Main Shaft{3303}

1983/09/26 Product Identification Number To Replace Serial Number On Earthmoving Equipment{7557}

1983/10/03 Use 6V6070 Tool Group And New Adjustment Procedure For New Scroll Fuel System{0654,1264,1278}

1983/10/03 New Oil Pump Has Bypass Valve And Oil Return Passage Inside The Pump{1304}

1983/10/10 S.O.S Program Synopsis{1318,5068,3179,0652}

1983/10/10 New Connecting Rod And Main Bearings Used{1203,1219,1226,1227,1230}

1983/10/10 Changes Made To Identification Marks On Connecting Rod Assemblies{1218}

1983/10/10 New Service Centers For 6V3100 Engine Timing Indicator Group{0651}

1983/10/10 New Water Pump Oil Seal Prevents Leaks{1361}

1983/10/17 Broken Edge Filter Or Plugged Cylinder Head Adapter Can Cause Rough Engine Operation Or Low Power{1252}

1983/10/17 Changes Made To Air Intake Shut-offs And Contactor Groups{1078}