1977/08/22 Caterpillar

New Main And Connecting Rod Bearings Are Made Of Higher Strength Material{1230}

Usage:

5.4"
Bore 90°
, and Earlier 60°
V-Type Engines in All Applications

SUPPLEMENT: 10/24/77

SERVICE MAGAZINE, AUGUST 22, 1977, PAGE 1. In the article "New Main and Connecting Rod Bearings Are Made of Higher Strength Material", a wrong part number is shown in the "Bearing Part Numbers" chart. Change the fourth new part number in the chart (for standard size main bearings) from 7N2558 to 7N2458.

--------------- END SUPPLEMENT ---------------

Description of Change: New main and connecting rod bearings are available for the above engines. The new bearings are made of a different aluminum alloy (mixture) which has higher strength and will give longer service life.

Adaptable As: Direct replacement. The former bearings are canceled, and if ordered, the new bearings will be sent.

Caterpillar Information System:

1977/08/15 Tools From Caterpillar To Test And Charge Air Conditioners And For Repair Of Frigidaire Compressors{7320,0651}

1977/08/08 Clean Bolt Holes In Cylinder Block Before Cylinder Heads Are Installed{1101,1201}

1977/08/08 New Air Inlet Manifold Has Longer Bolt Bosses With More Thread Depth To Keep Bolts Tight{1058}

1977/08/08 Spacers Added To Alternator Group To Improve The Mounting{1405}

1977/08/08 Larger Boss Used In Cylinder Block So Bolt Hole Will Not Be Drilled Into Coolant Passage{1201,1350}

1977/08/08 New Vickers Pump Design{5055}

1977/08/08 Correct Adjustment Of Fuel Shut-Off Solenoid Shaft Can Prevent Failures{1259}

1977/07/11 New Inserts To Repair Cylinder Liner Seats On D353 Engine Blocks{1201,1216,1217,0663,0653}

1977/07/11 Heat Absorbing Material Aids And Protects Surface Areas Being Welded Or Heated{0680}

1977/07/11 New Component Code List For Use In The Service Information Retrieval System{0331,0374}

1977/07/11 Safety Vent Caps For Caterpillar Batteries{1401}

1977/07/11 New Adjustment Pin And Valve Seal Used In Fuel Ratio Control{1278}

1977/08/22 Tools Now Available To Ream And/Or Hone 0.500" (12.70 mm) Diameter Valve Guides{0663}

1977/08/22 Improved Coolant Seal For Connection Between Cylinder Heads{1100,1350}

1977/08/22 Be Sure To Drain Oil In BrakeSaver At Every Lubricating Oil Change Period{1155,1300}

1977/08/22 Problems With Oil Or Fuel Filters{1261,1318}

1977/08/22 Installation Of Generator Sets On Rigid Bases{4450}

1977/08/29 New Clutch Groups Used In Front Power Take-Offs; Service Kits Available{3055}

1977/08/29 Improved Cylinder Block With Spacer Plates Used With Improved Cylinder Heads And Cylinder Head Gaskets{1101,1201,1221}

1977/08/29 New Tube Assemblies For Turbocharger Oil Lines; New Base Assemblies For Oil Filters{1052,1306,1307}

1977/08/29 Engine Valve Springs Are Now Made Of Stronger Steel{1108}

1977/08/29 Anti-Corrosion And Break-In Coatings{0374,3256}

1977/08/29 More Bolts Hold Flywheel Housing Group{1157,1162}

1977/09/05 Installation Procedure For Crankshaft Wear Sleeves Changed{1202,1160,1161}