1988/12/19 Caterpillar

New Camshafts Used; Camshaft Installation Kits Available {1209,1210}

Usage:

3300 Family Of Engines

Description of Change: New camshafts with harder cam lobes, improved heat treat processing, and a larger diameter between No. 1 and No. 2 bearing journals are used in the 3300 Family Of Engines. The new camshafts have more resistance to lobe pitting and torsional vibration.

Adaptable To: The new camshafts with all three improvements are effective as follows:

3306B Vehicular Engine-8Z32529, 13Z11760

3306B Industrial Engine-64Z4626, 7JB1847

3306B Marine Engine-84Z893

3306B Generator Set Engine-85Z2637, 5JC645

3306B Truck Engine-63Z3300, 5KD398

3304B Vehicular Engine-7Z16281, 12Z15683

3304B Industrial Engine-10E1710, 4XB362

3304B Marine Engine-13E742

3304B Generator Set Engine 83Z3131, 3TC884

The improved camshafts can be installed in all earlier engines in the 3300 Family. If the new camshafts are installed, use a complete set of new lifters and coat the shaft lobes with the special cam lubricant. Used lifters probably will not have the same service life as the new camshaft, resulting in additional repairs and downtime. For this reason, the applicable camshaft kit listed in the chart should be used when a new shaft is installed.

Caterpillar Information System:

1988/12/19 New Material Used For Rotating Seal Rings In Some Power Shift Transmissions, Steering Clutches And Torque Converters {3101,3150,4100}

1988/12/12 Valve Kit Available For Explosion Relief Valve{1201,1233}

1988/12/12 Oil Cooler Bypass Elbow Changed To Prevent Bypass Valve Seizure{1314,1318}

1988/12/12 New Alternator Drive Pulley Has Hardened Wear Sleeve; New Seal Used On Pulley{1425,1357}

1988/12/12 Maintenance Procedure Extends Service Life Of Exhaust Manifold Studs{1050}

1988/12/12 New Mounting Bolts Used In Aftercooler Housings{1063,1058}

1988/12/12 Revised Instructions For Installation of New Maintenance Free Batteries{1401,1400}

1988/12/05 Improved Air Conditioner Thermostat Switches Have Tin-Plated Internal Parts{7320}

1988/11/28 Bleed Holes Now In Paddle In Air Inlet Shutoff Groups {1078}

1988/11/28 Potentiometer Can Be Used In Place Of Temperature Probe For Demonstration Of Electronic Modular Control Panel {0315,7418}

1988/11/28 More Charts And Decals Available For Lubrication And Maintenance Intervals {0374,0375,7500}

1988/11/21 Excitation Portion Of Generators Changed To Give Longer Shaft Life{4454,4470}

1988/12/19 Check Assembled Dimension For Rack Lever Travel If Governor Housing Assembly Is Replaced {1264}

1988/12/19 Larger Valve Springs Must Be Used With Williams Blue Ox® 485 kPa (70 psi) Exhaust Brake; New Spring Compressor Group Available {1108,1109,1119,0702,0703}

1988/12/19 Correct Timing Specification {0374}

1988/12/19 New Piston Body Assemblies Used {1214}

1988/12/19 Do Not Use Heli-Coils® To Repair Rocker Arm Assemblies On 5.4" Bore Engines {1123}

1988/12/26 Check Load Height Before Transporting Machines {7500}

1988/12/26 New Screw Used In BrakeSaver Water Lines Group {1155}

1988/12/26 Remove Fuel From Electronic Control Module (ECM) Before Shipping {1705}

1979/01/08 Prevention Of Fires On Hydraulic Excavators{7000,5057}

1979/01/08 Check The Adjustment Of The Original Tachometer Before A New Tachometer Is Installed{7462}

1979/01/08 A New 6V29 Sleeve Metering Fuel System Pump Roll Pin Tool Is Used To Adjust And Make A Replacement Of Roll Pins In The Fuel Injection Pump Housing{0626}

1979/01/08 New 6V87 Gauge Measures Valve Stem Wear{0653,1105}