1997/10/10 Caterpillar


New Exhaust Bypass Group Available{1057}

Usage:


G3508 (4WD, 2JF, 9TG),
G3512 (4KC, 5JD, 7NJ),
G3516 (3RC, 8LD, 4EK, 5PN) Industrial Engines

Description of Change: A new exhaust bypass group replaces the former bypass group in the above engines. The new exhaust bypass group improves reliability and provides a plug and seal which prevents moisture from entering the wastegate housing. The set screw in the wastegate housing is protected from corrosion and seizure. The new hex head setscrew is lubricated with an anti-seize compound so it can be adjusted easily.

Adaptable To: See the following chart and illustration for item, description, and part number. The illustration shows where the parts are located when assembled:


View of the 146-0758 Exhaust Bypass Group.
(1) 146-0752 Setscrew. (2) 9S-4205 Straight Thread O-Ring Plug. (3) 146-0751 Cover Assembly. (4) 9X-7712 O-Ring Seal.

The new 146-0758 Exhaust Bypass Group is adaptable to the above engines back to first production.

Caterpillar Information System:

1997/10/10 Part Numbers For Stator Assemblies Available{1552}
1997/09/15 Lubricity Limit Added To Preferred Distillate Fuel Recommendation{1280}
1997/09/15 New General Maintenance Wall Charts Available{7500}
1997/09/15 Stainless Steel Instrument Panel Lines Groups Are Used{7451}
1997/09/15 Metal Particle Detector Kit Is Available For Particle Sensor Groups And Particle Detectors{7400}
1997/09/15 New Diagnostic Logic Used In Personality Modules{1901}
1997/09/15 Procedure For Disassembly And Assembly Of The Pressure Relief Valve{1233}
1997/09/15 Gas Admission Valve (GAV) Changed In Order To Provide For The Use Of Dial Indicator Settings{1102}
1997/09/15 New Manifold Soft-Wrap Shields Improve Reliability{1067}
1997/09/15 Bellows Replaces Flange And Pipe In Water Aftercooler Groups{1063}
1997/09/15 Stainless Steel Bolts Replace The Former Waspaloy Bolts{1059}
1997/09/15 Self-Locking Bolt Used On Cylinder Block Cover Groups{7553}
1997/10/10 Improved Piston Crown Assembly Used In The Rod And Piston Group{1214}
1997/10/10 New Piston Crown Improves Service Life{1214}
1997/10/10 Washers Available Within The Conversion Group (Landfill Carburetor) For Spacing Of Valves{1283,7553}
1997/10/10 Spark Plug Seat Cleaner Recommended For Use On Cylinder Heads{1555}
1997/10/10 Flexible Hose Assembly Replaces Tube Assemblies In Instrument Panel Lines Groups{7451}
1997/10/10 Water Cooled Pre-Chamber Insert Available{1103}
1997/10/10 Setpoint Value Explanation For "Low Oil Pressure Shutdown At Idle Speed" Added To SENR5809-03 Electronic Modular Control Panel (EMCP II) For MUI Engines{4490}
1997/11/14 New Troubleshooting Guide Available{0374}
1997/11/14 Significant Improvement For Pump Impellers (Water Pumps){1364}
1997/11/14 History Of Pump Impeller (Water Pump) Changes{1364}
1997/11/14 Special Instruction, REHS0164, "Conversion Of Generators From Self-Excited To Permanent Magnet" Is Available{4450}
1997/11/14 Improved Indicator Assembly Replaces The Former Indicator Assembly{7455}
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