New Plug With Straight-Threads Used In Engine Variable Timing Drive{1272}
Usage:
D10 ( 76X, 84W );
641B ( 65K );
651B ( 67K );
657B ( 68K );
776 ( 14H );
772 ( 11S ) Tractors;
773 ( 63G );
777 ( 84A ) Trucks;
D348 ( 36J, 38J );
D349 ( 62P, 57K, 32R ) Industrial, Marine, and Truck Engines
Description of Change: The plug in the end of the 4N6680 and 4S9498 Variable Timing Drive Assemblies in the above models has been changed from a pipe-thread plug to a straight-thread plug. With the former pipe-thread plug it was possible for the plug to come loose and cause a loss of oil pressure. The new straight-thread plug and seal, when used with a new retainer assembly, will prevent the loss of oil pressure.
Adaptable As: A direct replacement for the former parts if all the parts in the chart are used together.
Caterpillar Information System:
1980/05/19 "Viscor Cup" Available To Check SAE J967 Calibration Fluid For Fuel Injection Test Bench{0651}
1980/05/19 Turbine Wheel Shroud Design Changed; Snap Ring No Longer Used{1052}
1980/05/19 Important: 7V2253 Anti-Creep Slides Must Be Correctly Installed, And Adjusted With The Seat Belt{7327}
1980/05/12 Changes To Oil Level Gauge Group Improve Accuracy Of Oil Level Indications, Increase Oil Capacity Of 245 Excavators And Front Shovels{1300}
1980/05/12 Bushing Bores In Boom Can Be Machined In The Field{6501,0664}
1980/05/12 Possible Cause Of A Low Idle Misfire And/Or Backfire{1278,1076,1250}
1980/05/12 New Part Available To Check The 3S1467 Plunger And Barrel Assemblies{1251,1252,0652}
1980/05/12 Boss Can Be Removed From Spacer Plate Cylinder Block To Get Clearance For Oil Filler Tube{1201,1316}
1980/05/12 "I checked everything but..."{0100}
1980/05/12 Improvements To Engine Oil Lines Group Makes Installation Easier; Prevents Reverse Connections{1307,1318,1155}
1980/05/12 Use The FT1525 Alignment Pin And FT1526 Fixture When Reconditioning Earlier 3208 Sleeve Metering Fuel Systems{0626,1264,1286}
1980/05/05 Hardened Washers Now Used On Bolts For Fan Shroud{1353,1360}
1980/05/26 6V97 Engine Stand Is Available{0626}
1980/05/26 New Check Valve Used In Fuel Injection Pump Assembly{1251}
1980/05/26 Four Fabricated Tools Available To Adjust Carrier Bearing Preload And Backlash (Tooth Clearance) For Bevel Gear And Pinion{0611,3258,3256,3257}
1980/05/26 6V6 Electrical Connector Pliers Available{0613}
1980/06/02 Improved Procedure Can Be Used To Adjust Voltage Gain{4467}
1980/06/02 Reverse Flow Check Assembly Now Used In Fuel Injection Pump Assemblies{1251,1272,1254}
1980/06/02 Oil Pump Drive Sleeves Now Available Separately For Parts Service{3300}
1980/06/02 New Cylinder Sleeve Is Available For Repairs Of Worn And/Or Damaged Cylinders{1216,1201}
1980/06/09 6V2050 Tapered Rod Tool Group Available For Removal And Installation Of Bearings{1219,1218,1214}
1980/06/09 Check For Short Circuit In Rotor Field Windings If Low AC (Alternating Current) Voltage Is A Problem{4455,4457}
1980/06/16 6V3115 Repair Kit Is Available{0611,1380,1353}
1980/06/16 6V3075 Dial Indicator (Metric) Is Available{0653}