1999/07/01 Caterpillar


An Improved Watertight Junction Box Assembly And Watertight Electronic Box Groups Are Used {7426,7490,7555}

Usage:


G3606 (3XF),
G3608 (4WF),
G3612 (1YG),
G3616 (4CG) Engines

Reference: Engine News, June 1999, Page 13, "Rain Protection Shield Assemblies Available For Engine Junction Box And Engine Supervisory System (ESS) Control Panel"

Description of Change: An improved watertight engine junction box assembly and improved watertight electronic box groups (ESS II - Vee and ESS II - Inline), are used on these engines. These engine junction box assembly and electronic box groups have been upgraded to meet National Electrical Manufactures Association (NEMA) Type 4 enclosure requirements. The following changes were made to prevent water from entering the junction box assembly and electronic box groups.

The method for sealing the junction box and electronic box groups door opening has been improved. The box opening has been changed to a rolled-lip design. This rolled-lip provides a channel that routes water away from the box opening. A flat sealing gasket on the door is crushed against the rolled-lip when the door is closed and latched to provide a watertight seal. In the electronic box groups, a third latch location at top center was added to the door assembly.

The single boss located at the top of the engine junction box assembly for installing a lifting eye has been removed and replaced with two lifting mounts, one on each side of the junction box assembly.

The rain shields, mentioned in the Reference Article are not required with the new watertight boxes. Customers without the new boxes will need to use the rain shields as defined in the Reference Article, for the engine junction box assembly and the electronic box groups.

Adaptable To: The improved watertight 122-0802 Engine Junction Box Assembly is used in 122-0803, 125-3904, and 141-6401 Junction Box Groups. The improved watertight 128-3857 Electronic Box Group (ESS II - Inline) is used in 129-1316 Control Panel Group. The improved watertight 128-3858 Electronic Box Group (ESS II - Vee) is used in 129-1317 Control Panel Group. The improved watertight boxes are in effect as listed in the chart. The improved boxes can be used to replace earlier boxes of the same part number.

Caterpillar Information System:

1999/07/01 Marine Monitoring System (MMS) Thermocouple Wiring Color Codes {1906,1919,1921,1922,1929,7498}
1999/07/01 A New Control Assembly (XYCOM Monitor) Is Used In The Marine Monitoring System (MMS); Special Instruction With Procedure For Replacing The Former Control Assembly With The New Control Assembly Available {1901}
1999/07/01 Centrifugal Oil Filter Group Revised To Allow Higher Operating Pressures {1328}
1999/07/01 Risks Of Extended Oil Change Interval Practices {1300}
1999/07/01 Follow Fuel Changeover Procedure Before Synchronizing Fuel Injectors On Heavy Fuel Oil (HFO) Engines {1250,1274,1280,0374}
1999/07/01 New Connecting Rod Bolt Tightening Procedure {1218}
1999/07/01 New Piston Assembly Used {1214}
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1999/07/01 Worldwide Listing Of ABB Turbocharger Service Stations {1052}
1999/07/01 Operation And Maintenance Manual For 3600 Diesel Marine Monitoring System Has Been Revised {0374,7490}
1999/07/01 "Guidelines For 3600 Heavy Fuel Oil (HFO) Engines" Has Been Revised {0374,1000}
1999/07/01 O-Ring Seals Included On Terminal Assembly For The Electronic Ignition System (EIS) Transformer Group {1561}
1999/08/01 Caterpillar Service Technology Group (CSTG) Software Help Desk Changes{1920}
1999/08/01 New Material Improved Durability For STAY CLEAN VALVE(r) In Caterpillar High Efficiency Fuel Filters{1262}
1999/08/01 Extended Life Coolant - Still the Coolant of Choice{1395}
1999/08/01 New Service Manuals and Revised Service Manuals Available{0374,1000}
1999/08/01 Cold Start Advance Solenoid Available{1272,1250}
1999/08/01 Troubleshooting Hard Starting{1250}
1999/08/01 Several New Service Manuals and Revised Service Manual Modules Available{0374,1000}
1999/08/01 New Governor Control (Load Share Module) For Generator Set Engines{7490}
1999/09/01 New 173-1530 Injector Seating Tool Group Available{0710,1290}
1999/09/01 Engine Control For Dynamometer Or Diagnostic Testing{1000}
1999/09/01 Wider Crankshaft Gear Used{1204}
1999/09/01 New Caterpillar Digital Ignition System Provides Improvements Over Magneto Systems{1550,1552}
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