1980/10/06 Caterpillar

New Timing Advance Weight Used{1272,1288,1286,1264}

Usage:

Direct Injection 3406 ( 90U, 91U, 92U ) Industrial, Marine And Truck Engines;
980C ( 63X ) And 983B ( 58X ) Loaders;
824C ( 85X ) 621B ( 45P, 35V ) And 623B ( 46P ) Tractors;
825C ( 86X ) And 826C ( 87X ) Compactors;
16G ( 93U ) Motor Graders;
245 ( 95V, 94L ) Excavators And 245 ( 82X, 84X ) Front Shovels

Description of Change: A new, improved timing advance weight is used in the above models. The new, steel weight has a larger spring pocket for more clearance between the spring and pocket than the former timing advance weight.

It was some times possible for the spring to make contact with the pocket in the former weight and become worn. The result was failure of the spring.

Adaptable As: The new 1W2284 Timing Advance Weight is a direct replacement for the former 7N6176 Timing Advance Weight which is canceled.

Two timing advance weights are used in a governor and fuel pump drive group in 3406 Engines.

Caterpillar Information System:

1980/10/06 Fretting Material Must Be Removed Before Installation Of New Bearings{1202,1203,1218,1219,1201,1230}

1980/09/29 Use Starter To Turn Crankshaft For 30 Seconds Or Until Oil Pressure Gauge Shows Pressure, Before Engine Is Started{1300,1450}

1980/09/29 Some Test Procedures And Specifications Changed For 9L6884 Fuel Injection Nozzle Assemblies{1254,0651}

1980/09/29 Woodward 2301 Speed Control (8N1731 Speed Control Group) Can Be Adapted For Use As Field Test Instrument{0651,1264,1265,1289}

1980/09/29 FT1535 Idler Bearing Puller Available{0621,4167,4159}

1980/09/22 Install A New Oil Filter Element, Clean The Oil Lines And The Remote Filter Base; Turn The Engine Until The Oil Gauge Shows Pressure Before Starting A Rebuilt Engine {1307,1318}

1980/09/22 Use Correct Procedures To Charge Suspension Cylinders With Oil {7201}

1980/09/22 Do Not Use Room Temperature Vulcanizer Compounds Or Silicone Rubber Cements On O-Ring Seals In Engines; Do Not Use Too Much As Gasket Material {1000,7555}

1980/09/22 New Clamp Gives Protection To Tire Valve Assembly {4201,4202,4208}

1980/09/22 Install New Damper Assemblies During Assembly Of Radiator And Guard {1353,1381}

1980/09/22 Do Not Use Planet Gears Made From Forgings And Bar Stock Together In A Torque Divider Transmission {3110,3113,3114,3116,3118}

1980/09/22 6V3071 Seal Guide Keeps Seal In Position During Installation Of Transfer Pump {0620,1256}

1980/10/13 6V3184 Brush Group Available To Clean Crankshaft Oil Passages{0622,1202}

1980/10/13 6V2156 And 6V2157 Link Brackets Now Available To Lift Heavy Loads{0644}

1980/10/13 New Tools Available For Installation Of Crankshaft Seals And Wear Sleeves{0622,1160,1161}

1980/10/13 6V3116 Adapter Group Is Available For Use On Fuel Injection Test Bench{0652,1251}

1980/10/13 Improved Temperature Control Switch Used On Machines Equipped With Air Conditioner Units{7320}

1980/10/13 Correct Assembly Of Shuttle Valve In Pump Control Head Group Is Important{5079,5070}

1980/10/13 Understand The Effects Of Extended Oil And Filter Change Intervals{0375}

1980/10/20 Instructions For Modification Of The 5P8630 Driver Head Which Is Part Of The 6V82 Final Drive Bearing Adjustment Tool Arrangement{0654,4050}

1980/10/20 Valve Assembly Used In Centershift Lock Control Group To Prevent Accidental Rotation And Lowering Of Blade{5220,5221,5223,6151}

1980/10/20 Larger Diameter Retainer Ring Used To Hold Rear Bearing In Transmission{3176,3150}

1980/10/20 New Fan Motor Used In Basic Heater Groups{7304}

1980/10/20 Before You Use Any Service Publication, Make Sure It's Current{0374}