New Camshaft Has Improved Wear Resistance{1210,1209}
Usage:
3306, 3306B Engines
Description of Change: A new camshaft, with higher carbides, is now used. The higher carbides provide more resistance to spalling, pitting and wear. The follower did not change.
Adaptable To: The new 7E9980 Camshaft is a direct replacement for the former 7C3863 Camshaft. The new camshaft is effective with engine serial numbers 08Z57268, 13Z23027, 63Z19144, 64Z9679, 84Z1806, 85Z6799, 7JB4776, 2AJ371, 5KD2476. The new camshaft is serviced only in a kit. The new 4P2942 Cam Kit replaces the former 9Y1722 Cam Kit and includes the 7S3161 Valve Lifter and 8T2998 Lubricant.
For 3306 ATAAC Truck Engines, an alternate camshaft with roller followers is available. See article in this issue titled "New Roller Camshaft Used."
Caterpillar Information System:
1990/11/19 New Roller Camshaft Used{1209,1210}
1990/11/19 Use Only Stainless Steel Cylinder Liner Shims To Salvage Damaged 4.75" Bore Cylinder Blocks{1201,1216,1217}
1990/11/19 Check Engine Speed Sensor And/Or Crank Angle Sensor (Magnetic Pickups) For Fouling{1912,1900,1907,7529}
1990/11/19 Correct Procedures For Starting, Stopping And Transporting A Product With A Turbocharged Engine{1052}
1990/11/19 New Caterpillar Battery Warranty Statement, SELF5124{1401,7780}
1990/11/19 Diagnostic Connector Used To Determine Starter Problems; Starter Monitor Unit Can Be Fabricated{0710,1408,1416,1426,1467,1553}
1990/11/12 New Alternator Drive Pulley Seal Used With New Drive Pulley; Poly-Vee Belt Can Be Installed {1425,1357}
1990/11/12 Adjustable Exhaust Bypass Group Used; Provides More Precise Ability To Set Exhaust Pressure {1057}
1990/11/12 New 7X1400 Digital Diagnostic Tool (DDT) Group Available {0782,0785,1900}
1990/11/05 New Crankshaft Seal Groups Used{1160,1161,1202}
1990/11/05 Service Manual SENR3479-04 Available For Troubleshooting Engine Test Procedures{1901,1900}
1990/11/05 Some Components Of The 7E3580 Engine Adapter Group For Allison AT545, MT543D, And MT653DRD Transmissions Are Not Serviced By Caterpillar{3279,1013,3009}
1990/11/19 Field Replacement Of Spacer To Correct Possible Sticking In Woodward 3161 Governor Electric Shutoff Group{1264}
1990/11/19 New 4C6715 Silicone Compound Available For Components Where Centrifugal Force Is Present{4465,4466,4472,4473}
1990/11/19 Planetary Housing Requires Two Ball Plugs{3160}
1990/11/26 New Shim Improves Low Idle Stability Of Governor{1265,1256}
1990/11/26 Improved Fuel Injection Pump Groups Have New Injector Groups{1290}
1990/11/26 New Air Compressor Crankshaft Has Improved Spline Lubrication{1803}
1990/11/26 Service Tips For Piston Cooling Jets (Tubes){1331}
1990/11/26 Use Status Screen On Electronic Control Analyzer Programmer (ECAP) When Checking The Calibration Of The Timing And Rack Sensors; Correction To Systems Operation, Testing & Adjusting for 3406B (PEEC) Diesel Truck Engine, Form SENR3485-01{1905,1911
1990/11/26 New Oil Pressure Sender Assembly Improves Accuracy Of Oil Pressure Indicator{7455}
1990/11/26 New Expansion Tank Used{1354}
1990/12/10 New Caterpillar Warranty Statement For Ground Engaging Tools, SELF5138{6800}
1990/12/10 Improved 9W1077 Start Switch Assembly And 7N4160 Heat Start Switch Group{1416}