1979/06/06 Caterpillar


New Centering Rings For Oversized Main Bearings

Usage:


All Caterpillar Engines

Oversized main bearings have been available for some time and have been installed in many engines. To rebore the cylinder blocks on these engines, oversized centering rings are needed. New centering rings that are .025" (0.63 mm) larger are now available. The 6V138 Centering Ring is .010" (0.25 mm) larger. These new centering rings can be used for line boring blocks with one or more oversized main bores.

New centering rings are:

The same instructions as shown in the Special Instructions Form GMG00503-02 for standard centering rings are used for oversized centering rings.

Caterpillar Information System:

1979/06/06 New Type Products Available To Clean Cooling Systems
1979/06/06 Check Crankshaft Seals During Installation Of Engine Overhaul Gasket Kits; Add A Wear Sleeve When Needed
1979/06/06 A New Method To Clean And Polish Engine Valve Stems
1979/05/23 Two Fuel Pressure Pumps Are Available To Increase Fuel Pressure
1979/05/23 New Filler Bands Give A Better Seal Between The Cylinder Liners And Cylinder Block
1979/05/23 An Ammeter Calibration Group Is Now Available
1979/05/23 Shorter Mounting Bolts Used For Glow Plug Wiring
1979/05/23 Do Not Use Later 9N3979 Nozzle Assemblies In Place Of Earlier Nozzle Assemblies
1979/05/23 How To Prevent Cylinder Block Failure From Cracks
1979/05/23 5P3519 Piston Ring Gauge Has Improved Design For Better Accuracy And Easier Use; Corrected Information For Use On Pistons That Have Two Ring Grooves
1979/05/23 New Hose Assembly Will Give Longer Service Life With High Oil Temperatures
1979/05/23 New Flywheel Housing Corrects Clearance Problem With Cylinder Block
1979/06/06 Correct Locations To Connect Gauges For Checks Of Engine Oil Temperature And/Or Pressure
1979/06/06 9S8100 Tool Group Changed To Use With Fuel Transfer Pump Only
1979/06/06 New Washers For Injection Valve Nozzles Must Be Added To Valve Grinding Gasket Kit When Used With Later Engines
1979/06/06 Inspection Of Parts Stocks Of 9L9200 Oil Filters
1979/06/20 New "L-Shaped" Clutch Plates Now Used
1979/06/20 During Installation Of An Auxiliary Bypass Oil Filter, Be Sure Passage In Oil Cooler Fitting Is Open
1979/06/20 List Of Service Publications
1979/06/20 Inspection Of Air Inlet 9L7630 Gaskets
1979/06/20 Shorter Bolt Used In BrakeSaver Manifold To Prevent Possible Contact With Bolt In Transmission
1979/06/20 New Specification For Installation Of Camshaft Front Bearing In Cylinder Block
1979/06/20 Test Specifications Now Available For 9N3979 And 9N2366 Pencil Type Fuel Nozzle Assemblies
1979/06/20 Rod Bearings For Parts Service Have Reliefs (Grooves) Cut On The Outside Diameter
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