1979/08/27 Caterpillar

New Rocker Arms And Rocker Arm Shaft Have Improved Lubrication{1102}

Usage:

All 3304 and 3306 Industrial, Marine, Truck and Vehicular Engines

Description of Change: An improved rocker arm shaft assembly and exhaust and inlet valve rocker arms are now used on the above models.

The location of the oil hole in the new rocker arm shaft is about 45° below horizontal, with the shaft installed. The new rocker arms have a groove on the inside of the bearing. These changes give better lubrication between the shaft and rocker arm bearings. For this reason these parts will have a longer service life.

Adaptable As: The new rocker arm shaft and rocker arms, used together, are a direct replacement for the former parts as shown in the parts chart. The former parts are canceled. Either the new or former rocker arms can be used with the former rocker arm shaft. The former rocker arms must not be used with the new rocker arm shaft.

Caterpillar Information System:

1979/08/27 Engine Oil Viscosity Changed To SAE 10W/30 For Shipment From All U. S. Factories{1318}

1979/08/27 Hardened Washers And Increased Torque Are Now Used On The Bolts Which Fasten The Circle Drive Group To The Circle Drawbar{5207,6153}

1979/08/27 6V190 Clamp Is Available For Use On Sleeve Metering Fuel Systems{0626,1250}

1979/08/27 New Governor Housing Assembly Used In Governor And Fuel Injection Pump Group{1253,1264}

1979/08/27 Steering System Improvements Prevent Possible Damage To Steering Cylinder Sockets{4303,4304,4305,4322}

1979/08/27 New Seal For Precombustion Chamber Has More Resistance To Heat And Steam{1106}

1979/08/27 Why Engines Are Damaged By Fuel Sulfur{1104,1216,1280,1318,1215}

1979/08/20 New Rear Cover And Gasket Used On Water Pump{1361,1350}

1979/08/20 Turbocharger Bearings Are Now Available In More Different Sizes For Better Turbocharger Reconditioning{1053}

1979/08/20 Pump Failure Can Be Prevented{5070,5200}

1979/08/20 Flex Plate Kits Are Now Available For Vickers Vane-Type Hydraulic Pumps{5055}

1979/08/13 Sealant Now Used On Pipe Plugs At The Bottom Of The Oil Filter Base Assembly To Prevent Oil Leakage{1306}

1979/08/27 New Design Thrust Plate Used In Crankshaft Group{1201,1202,1203}

1979/09/03 Use Caution To Prevent Damage To Plastic Check Valve In Hydraulic Oil Tank And Transmission Oil Tank Drain{5056,3177}

1979/09/03 Only One Dowel Pin Is Now Used To Hold The Thrust Bearing In The Correct Position{1053,1052}

1979/09/03 Follow Recommendations Given In Special Instructions For Modification Of Rollover Protective Structures (ROPS) At All Times{7323,7325}

1979/09/03 Important: Use Only 8N4029 Fan On 769C Trucks And 768C Tractors{1356}

1979/09/03 Quick Disconnect Coupling On Optional Modification Of 5P4150 Nozzle Tester Permits Faster Exchange Of Adapters{0651,1254}

1979/09/03 Improved Wire Assembly For Glow Plugs{1403}

1979/09/03 Improved Hardware Now Used To Fasten Front Suspension Cylinder To Frame{7201}

1979/09/10 Insulation Sleeve For 5P7360 Tach Generator Now Available {7462}

1979/09/10 Stronger Bolt Now Used With Exhaust Manifold {1059,1307}

1979/09/10 6V2055 High Vacuum Grease Gives Better Oil Seal {1052,1053,1077,0682}

1979/09/10 Undercarriage Disassembly And Assembly Procedures And Specification Charts Are Available {4150,4159,4154,4171,4180}