1984/11/26 Caterpillar

New Fuel Injector Assembly Reduces Smoke When Operating At Lower RPM And Load{1251,1250}

Usage:

3500 Series Marine And Generator Set Engines With 1301 To 1600 Full Load RPM

Description of Change: The above engines use the new 7W1035 Injector Assembly. 3500 Series Marine and Generator Set Engines with 1601 to 1800 full load rpm, 3500 Series Industrial Engines and 3500 Series Vehicular Engines will continue to use the 2W5201 Injector Assembly.

An engine with 2W5201 Injector Assemblies may produce excessive black smoke when operated at lower rpm and load. The use of 7W1035 Injector Assemblies will reduce black smoke at the lower rpm and load.

Adaptable To: The new 7W1035 Injector Assembly is in effect as shown in the chart. The 7W1035 Injector Assembly can not be used in a engine with a full load setting higher than 1600 rpm. If the new injector assemblies are installed in place of the former injector assemblies, the fuel and high idle settings must be changed.

NOTE: The 7W1035 Injector Assembly can not be used in an engine with the 2W5201 or 7N5427 Injector Assemblies, except as a complete set. The fuel rate for the 7W1035 Injector Assembly is different at any fuel setting than the fuel rate for the 2W5201 or 7N5427 Injector Assemblies.

Caterpillar Information System:

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}

1984/11/19 Additional Information For Correct Fuel Injector Timing{1290}

1984/11/19 Remanufactured Cylinder Head Groups{1100,1101,7554}

1984/11/19 Use Care When Installing Circuit Boards In Regulators{4467}

1984/11/05 Thread Identification Kit Available{0600,0760}

1984/11/05 Preferred Engine Timing Procedures{1250,1286,1290,1292}

1984/11/05 Remove Diode Assemblies From Shutoff Solenoids{1259}

1984/12/10 Fill Oil Sump Before Installing Woodward Governor{1264,1288,1289}

1984/12/10 New Pressure Gauges Have Dual Scales [kPa (psi)]{0600}

1984/12/10 Lubrication Decals (Films) Are No Longer Used On Machines{7557}

1984/12/10 Starters That Remain Engaged After Engine Is Running{1453}

1984/12/10 New 76.6°C (170°F) Water Temperature Regulators Used In Inlet Controlled Cooling Systems{1355,1350}

1984/12/10 New Air Pipe Retainers Used To Connect Turbocharger To Aftercooler{1052,1063}

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}