New Air Pipe Retainers Used To Connect Turbocharger To Aftercooler{1052,1063}
Usage:
D7G, 615 Tractors;
637D, 637D P-P, 637D SA, 637D P-P SA, 639D Scrapers
Description of Change: New retainers are used to secure the air tube between the turbocharger and the aftercooler in the above models. See the illustration. The retainers have a yoke design which provides better retention of the air tube. Formerly, flat washers were used to secure this tube. It was possible for the washers to vibrate loose, causing loose connections at the turbocharger and aftercooler joints. This resulted in a loss of manifold boost pressure and possible leakage of unfiltered air into the air intake system.
Adaptable As: The new retainers and new bolt are direct replacements for the former washers and bolts as shown in the following chart.
Caterpillar Information System:
1984/12/10 New 76.6°C (170°F) Water Temperature Regulators Used In Inlet Controlled Cooling Systems{1355,1350}
1984/12/10 Starters That Remain Engaged After Engine Is Running{1453}
1984/12/10 Lubrication Decals (Films) Are No Longer Used On Machines{7557}
1984/12/10 New Pressure Gauges Have Dual Scales [kPa (psi)]{0600}
1984/12/10 Fill Oil Sump Before Installing Woodward Governor{1264,1288,1289}
1984/11/26 New Fuel Injector Assembly Reduces Smoke When Operating At Lower RPM And Load{1251,1250}
1984/11/26 Identification Of Camshaft Groups And Valve Mechanism Groups{1210,1102}
1984/11/26 Important Differences In Engine Arrangements On 3208 Engines Equipped With Turbochargers{1000}
1984/11/26 Rear Power Take-Off Clutch Can Use Nonmetallic Plates And Grease Lubrication For Main Bearings{3055,3305}
1984/11/26 Causes And Correction Of Opposite Crankshaft Rotation In Direct Injection Engines{1000}
1984/11/19 Remanufactured Piece Parts Now Available For Turbochargers (U.S. and Canada Only){1052,1053,1056,1065,1077}
1984/11/19 Fuel Setting And Related Information Microfiche Corrected, Improved{0374,0375}
1984/12/10 Improved BrakeSaver Seals Available{1155}
1984/12/10 A Soot Filter Is Available For Use With Air Cleaners{1054}
1984/12/10 New Seal Used In Alternator Mounting Group{1405,1400}
1984/12/10 Addition Of Lubricator Will Help Prevent Corrosion In Air Prelube Motors{1319}
1984/12/10 Improved Turbocharger Oil Drain Elbows{1307,1052}
1984/12/10 Additional Clamp Reduces Vibration Of Turbocharger Oil Supply Line{1050,1052,1053}
1984/12/10 Bonnet Of Fuel Injection Pump Group Now Serviced Separately{1251,1250}
1985/01/14 Minimize Fuel Problems In Cold Weather Operation {1280,1250}
1985/01/14 New And Improved Gaskets In Front Housing Group And Accessory Drive Group {1151,1150}
1985/01/14 Install Different Body Assembly In Clutch Group To Correct Harsh Shifting {3312,3302}
1985/01/14 Remanufactured Air Fuel Ratio Controls {1278,7754}
1985/01/14 Remanufactured 1160 Engines Now Use Sleeve Metering Fuel Systems {1250,1286}