1985/10/14 Caterpillar

"Routine" Mid-Life Roll-Ins Of Main And Connecting Rod Bearings No Longer Recommended{1230,1203,1219}

Usage:

Reference: Service Magazine, April 29, 1985, Page 4, "Installing New Copper Bonded Bearings Can Extend Engine Life"

Until the introduction of the new copper bonded connecting rod and main bearings, Caterpillar recommended, in many applications, rolling in new bearings at mid-life. Rolling in new bearings at mid-life before bearing failure was proven to be cost effective maintenance.

With the introduction of Caterpillar's new copper bonded bearings, mid-life bearing roll-in is no longer recommended in normal applications when the engine receives proper maintenance. The following conditions may suggest the need for a mid-life bearing inspection.

* Marginal lube operation

* Excessive metal in oil filter

* Excessive lube oil sooting (extended oil periods)

* Excessive lube oil dilution (fuel or coolant)

* Excessive cooling system temperatures

* Excessive Pb and Al in S·O·S

* Reuse of a crankshaft with a marginal profile or surface finish

Caterpillar Information System:

1985/10/14 New Fuel Pressure Switch Available{7490,7332,1419}

1985/10/14 Fuel Transfer Pump Improved{1256}

1985/10/07 Stronger Air Cleaner Support Assembly{1050,1051}

1985/10/07 Digital Electric Tachometer Group Available{7462}

1985/10/07 Check Height Of Locating Dowels Before Installing Cylinder Head{1201}

1985/10/07 O-Ring Seal Not Needed On Turbochargers{1052}

1985/10/07 Dust Can Cause Generator Set Vibration{4450}

1985/10/07 Two, New Top Dead Center Magnetic Transducers Available{0651,0653,1214,1250}

1985/10/07 New Water Cooled Exhaust Manifolds Available; Existing Water Cooled Exhaust Manifolds Can Be Strengthened Or Salvaged{1059}

1985/09/30 Conversion Group Available For Increased Power{0600}

1985/09/30 Torque Increase For Cylinder Head Bolts{1101}

1985/09/30 Restarting Engines Without A Fuel Priming Pump{1250,1258}

1985/10/14 Recommendations For Cooling Systems And Cold Weather Operation{1350}

1985/10/21 Use Glycerine On Most O-Ring Seals {7555,1216,1050}

1985/10/21 Cylinder Head And Valve Rocker Arm Brackets Have Oil Supply Passages In A Different Location To Prevent Possible Oil Leakage Into Cooling System {1100,1102,1350}

1985/10/21 Engine Shuts Down Immediately After Start-Up {7400}

1985/10/28 What ROPS/FOPS Certification Means{7323,7325,7264,7266}

1985/10/28 Comparison Of Fuel Timing Tolerances For Field Settings{1250,1251,1281}

1985/10/28 Engine Information Plate Contains More Data; Use Of Performance Specifications{1250,7557}

1985/10/28 Higher Temperature Material Used In Camshaft Base Gasket{1113,1120}

1985/10/28 Check Fuel Injection Replacement Pump Installation{1251,1253,1257}

1985/10/28 New Marine Transmission Oil Cooler Group Available{3320}

1985/10/28 Air Regulated Torque Wrench Group Available{0614}

1985/11/04 Reusability And Assembly Recommendations For Conventional And Inverted Duo-Cone Seals {7561}