1999/03/01 Caterpillar


Atmospheric Pressure Sensor Design Improvements {1901,1923}

Usage:


3406E (1MM, 1LW, 2WS, 5DS, 5EK, 6TS) Truck Engines

Description of Change: Several improvements have been made to the atmospheric pressure sensor that is used in the above 3406E Truck Engines. These improvements to the atmospheric pressure sensor will help to prevent the entry of moisture into the sensor. This will help to increase the service life of the sensor.

Adaptable To: The improved 111-8125 Atmospheric Pressure Sensor became effective with 3406E (1LW, 5DS, 5EK, 6TS) Truck Engines in May 1998. This sensor may be used on any 3406E (1LW, 5DS, 5EK, 6TS) Truck Engines produced prior to 1999.

The improved 111-8125 Atmospheric Pressure Sensor has been in effect in the parts system since the second quarter of 1998.

All 1999 model year 3406E (1MM, 2WS) Truck Engines use the improved 161-9925 Atmospheric Pressure Sensor. This pressure sensor incorporates all of the improvements which have also been made to the 111-8125 Atmospheric Pressure Sensor, but is not interchangeable with the other sensor.

Caterpillar Information System:

1999/03/01 New O-Ring Seals For Unit Injector Sleeves {1125}
1999/03/01 New Turbocharger And Software Used {1052}
1999/03/01 Installing 1999 ADEM 2000 HD Engine Into Earlier ADEM II HD Engine Chassis {1901,1923}
1999/03/01 Create And Save The ECM Customer Parameters List As A Back-Up {1901}
1999/03/01 Use 145-5247 And 147-2675 Wear Sleeve Installer To Install Crankshaft Wear Sleeves {1202}
1999/03/01 Troubleshooting Guide Corrections {0350}
1999/03/01 70-Pin Breakout "T" Harness For The ADEM 2000 Truck Engine ECM {1901}
1999/03/01 Optional 4-Pin Coolant Level Sensor {1395}
1999/02/01 Air Compressor Drive Gear Holding Tool Available{0700,1803}
1999/02/01 Installation Procedure For Hydraulic Electronic Unit Injector (HEUI) Oil Pump High Pressure Oil Line{1714}
1999/01/01 Use 144-0235 Belt Tension Gauge To Check Belt Tension{7461,1357}
1999/01/01 New Two-Piece Spool And Diaphragm For BrakeSaver Control Valve Now Used{1155}
1999/04/01 New Caterpillar High Efficiency Fuel Filters With STAY CLEAN VALVES® Replace All Standard Fuel Filters In February Of 1999{1261}
1999/04/01 Hydraulic Electronic Unit Injector (HEUI) Pump Service Tips{1714}
1999/04/01 Exhaust Brakes May Need To Be Modified Or Replaced{1093}
1999/04/01 New Valve Lifter Assemblies (Full Body Roller Follower) And New Lifter Guide Springs Used{1209}
1999/04/01 Remove Engine Oil Pan To Determine Source Of Internal Coolant Leakage{1302,1348,1361,1395}
1999/04/01 New Integral Seal (Air Compressor Mounting Seal) Available{1803}
1999/04/01 New Cooling System Vent Line Check Valve Helps Prevent Over Cooling{1370}
1999/05/01 New Design Of Cylinder Block And Main Bearings {1201,1203,1224}
1999/05/01 New Main Bearing Material {1203}
1999/05/01 Correction To Oil Level Gauge (Dipstick) Calibration Procedure {1326}
1999/05/01 A New Special Instruction Is Available To Help Determine The Reusability Of Camshafts In 3406E Truck Engines {0374,1210}
1999/05/01 Jake Brake Settings For The 3406E Truck Engines {1119}
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