1991/10/07 Caterpillar

Assembly Procedure For Duo-Cone Seals Changed{7561,0645}

Usage:

Isopropyl alcohol (99% or greater) has been added to the assembly procedures for all Duo-Cone seals. Isopropyl alcohol is an alternative assembly lubricant to trichloroethane.

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Flammable! Isopropyl alcohol vapor or liquid will ignite. Do not use near open flame, welding operations or other heated surfaces. Avoid prolonged skin contact with isopropyl alcohol. Avoid breathing vapors in enclosed areas without adequate ventilation.

Isopropyl alcohol (99% or greater) can be used, provided the following conditions are met:

1. Isopropyl alcohol requires a minimum of ten minutes drying time prior to assembly. Drying time can be reduced by using filtered compressed air with less than 70 kPa (10 psi) to force dry the seal area.

2. All safety and disposal guidelines must be followed for flammable liquids.

NOTE: Isopropyl alcohol is available through your local supplier. Refer to the supplier's "Material Safety Data Sheet" before using isopropyl alcohol.

Caterpillar Information System:

1991/09/30 New Piston Crown And Piston Skirt Used In Basic Piston Group; New Cooling Jet Used In Cylinder Block Group{1214,1331}

1991/09/30 Use 7E5888 Fuel Injection Pump Housing As A Service Replacement For Pre 1991 Fuel Injection Pump Housings{1253}

1991/09/30 Air Filter Maintenance{1051,1054}

1991/09/30 Compression Ratio Increased On Remanufactured OR1094 & OR1095 Engines To Reduce Amount Of White Smoke On Cold Weather Start-Ups{1000,1254,1290}

1991/09/30 "Off-Size" Bearing Kits Available For Parts Service{1052,7551}

1991/09/30 Updated List Of Charts And Decals Available For Lubrication And Maintenance Intervals{0374,0375,7500,7557,7581}

1991/09/30 Excessively Long Bucket And Ripper Tips May Cause Failures{6800}

1991/09/23 New Auxiliary Water Pump Groups Used{1371}

1991/09/23 New Pickup Assembly In Sump Pump Group Attachment Removes More Oil From Oil Pan{1324,1302}

1991/09/23 New Piston Skirt Used In Piston Group{1214}

1991/09/23 New Tube Assembly Used In Exhaust Bypass Group Attachment{1057}

1991/09/23 Sintered Bronze Replacement Bushings For Delco-Remy Electric Starting Motors Do Not Require Machining{1453,1454,1465}

1991/10/07 New SR 4 Generator Rewind Data Available{4450}

1991/10/14 New Locking Bolt Used In Flywheel Groups{1156}

1991/10/14 New Teflon Coated 4P9388 Cylinder Seal Available{1216}

1991/10/14 New Components Used In Fuel Injection Pump Groups{1290}

1991/10/14 7S3161 Valve Lifter Has Three Different Designs{1209}

1991/10/14 No Gaskets Used With Aluminum Flywheel Housings{1157}

1991/10/14 New Piston Pin Retainer Used{1225}

1991/10/14 End Clearance Specification Changed For Front Shaft In Fuel Injection Control{1251,1258}

1991/10/21 New Oil Pump Used As Service Replacement {3310}

1991/10/21 How To Repair Oil Leaks Between Front Housing And Spacer Deck {1221}

1991/11/11 Computerized Monitoring System (CMS) Has Improved Electrical System Monitoring{7400}

1991/11/18 New Auxiliary Water Pump Groups Used{1371}