New Fuel Return Valve Prevents Siphoning{1253,1274}
Usage:
3114, 3116 Engines
Description of Change: A new fuel return valve is used in the fuel filter lines group. The valve uses spring force against an O-ring seal and seat. This provides a positive seal against fuel siphoning when the engine is not operating. The former valve could allow the fuel to siphon back to the tank making it hard to start the engine.
Adaptable To: The part numbers of the improved 7W9854 (3114 Engines) and 7C9651 (3116 Engines) Fuel Filter Lines Group have not changed. The new valve is effective with 3114 (5EF562, 6AF580, 3ZG116, 5JG742), 3116 (2WG830, 2SG935, 4KG107, 1NJ998, 7SF1) Engines. These parts are adaptable to earlier engines. There is one of each of the new components.
Location of components.
Caterpillar Information System:
1989/12/25 New Cooling System Cleaner Now Available For All Engines{1350,0680,1352,1353}
1989/12/25 Do Not Use 1U5555 Hydraulic Hose Press Pump Group In 230 Volt Circuits{0616,5057}
1989/12/25 New Assembly Method For Track Links Makes It Easier To Install And Adjust{4169,4170}
1989/12/18 New Seal Group Used In Seawater Pump{1371,1361}
1989/12/18 Paper Liner Available For Centrifugal Oil Filters{1328}
1989/12/11 Cooling System Drain Valves Available{1372}
1989/12/11 Modification Of 2W1054 Screen Assembly For Use During Dynamometer Testing{1307}
1989/12/11 New Spark Plug Used In Ignition Groups{1555}
1989/12/11 New Camshaft And Lifter Kits Available For Slipper Type Cam Followers (Valve Lifters){1209,1210}
1989/12/11 Additional Information For Checking Valve Camshaft Timing{1105,1110,1112,1121}
1989/12/11 4C4213 Insulation Tester for Electrical Power Generation{0785}
1989/11/27 New Turbocharger, Piston And Fuel Ratio Control Used{1052,1214,1215,1278}
1989/12/25 New Valve Assembly And Washer Used In Fuel Transfer Pump Group{1256}
1989/12/25 Improved Gaskets And Covers Used In Cover Groups, Connection Group And Water Lines Groups; New Clips Used In Water Lines Groups{1350,1063}
1989/12/25 Improved Valve And Injector Jam Nut Used In Valve Rocker Arm Group{1123}
1990/01/15 Separate Service Manual Microfiche Library Available For Engines Only {1000,0374,0375}
1990/01/15 Service Element Available For Flexible Coupling Group {3252}
1990/01/15 Unit Injector Tips Now Have An Improved Brazing Technique {1290}
1990/01/15 New Head Gasket Used On 3306B Truck Engines {1124,1100,1101}
1980/11/24 Coolant Conditioner Elements Are Now Available For 3208 Truck Engines
1980/11/24 Kysor Air-Operated Shutdown Actuators For 3406, 3408, 1693 Truck Engines
1980/11/24 Modification Of Puller Bolt Prevents Thread Damage During Removal Of Sleeve From Sleeve Metering Fuel System{0621,1251,1253}
1980/11/24 Inspect All Engine Oil And Fuel Filter Elements Before Installation{1000,1261,1318}
1980/11/24 Check For Correct Spring Retainer On Oil Pump Bypass Valve When Oil Pan Is Removed