1985/09/23 Caterpillar

New Bleed Screw Used In Fuel Injection Nozzle{1254}

Usage:

3300 Series Engines

Description of Change: The bleed screws used in the fuel injection nozzles in 3300 Series Engines have been changed. The new bleed screw has a "TORX" socket head. The former bleed screw had a hex socket head. See the illustration. The new "TORX" socket head bleed screw will provide better sealing and more consistent torquing capability. A "TORX" T-15 Tool is required to remove and install the new "TORX" bleed screw. This tool should be available from local tool suppliers. The installation torque of the new bleed screws has not changed.

Bleed screw identification.

Adaptable As: The new "TORX" bleed screws are used in 8N7005 Fuel Injection Nozzles with date codes G-5 and H-5. These nozzles are used in 3300 Series Industrial, Marine and Generator Set Engines.

The new "TORX" bleed screw is not currently serviced. If the bleed screw is damaged or lost, replace it with a 2W1230 Hex Socket Head Bleed Screw.

Caterpillar Information System:

1985/09/23 New Keystone Ring Groove Gauge Available{0763}

1985/09/23 Procedure For Turning Pins And Bushings On Sealed And Lubricated Track{4175}

1985/09/16 New Air-To-Air Aftercooler Arrangement Used On Truck Engines {1063}

1985/09/16 New O-ring Seals And Additional Clamps Used In Instrument Panel Fuel Filter Differential Lines Group {1250}

1985/09/16 Engine Valve Lash And Fuel Injection Timing Adjustment Procedure {1100,1251}

1985/09/16 Keep Product Information System Up-To-Date {0330,0350,0373}

1985/09/16 Use Product Information System For Consists Of Engines With No Bills Of Material {0330,0350,0373,1000}

1985/09/16 Pressure Switch Has Been Improved {1419,7332}

1985/09/16 Changes To Fuel Systems {1250,1251,1252,1253,1254,1100}

1985/09/16 New Tools Available To Change BrakeSaver Control Valve Diaphragm {0600,1155}

1985/09/16 Oil Pump Groups Improved {1304}

1985/09/02 Fumes Disposal Group Improved{1317}

1985/09/23 List Of Mechanical Service Meters For Earlier 3500 Series Engines Using Mechanical Service Meters{1286}

1985/09/30 Maximum Wear Limits Established For Camshaft Roller Followers{1209}

1985/09/30 Restarting Engines Without A Fuel Priming Pump{1250,1258}

1985/09/30 Torque Increase For Cylinder Head Bolts{1101}

1985/09/30 Conversion Group Available For Increased Power{0600}

1985/10/07 New Water Cooled Exhaust Manifolds Available; Existing Water Cooled Exhaust Manifolds Can Be Strengthened Or Salvaged{1059}

1985/10/07 Two, New Top Dead Center Magnetic Transducers Available{0651,0653,1214,1250}

1985/10/07 Dust Can Cause Generator Set Vibration{4450}

1985/10/07 O-Ring Seal Not Needed On Turbochargers{1052}

1985/10/07 Check Height Of Locating Dowels Before Installing Cylinder Head{1201}

1985/10/07 Digital Electric Tachometer Group Available{7462}

1985/10/07 Stronger Air Cleaner Support Assembly{1050,1051}