Neutral Lead (Wire No. 26) Eliminated On VR3 And VR4 Voltage Regulators {4453,4474}
Usage:
All Generator Sets So Equipped
Description of Change: All generator sets equipped with either the 7C1600 Voltage Regulator Assembly (VR3) or the 7C7557 Voltage Regulator Assembly (VR4) no longer have wire No. 26. This is the wire connected between terminal 26 on the voltage regulator and the neutral wire (T0) of the stator. It has been determined that this wire is not needed, so it is no longer used.
It should also be noted that without the neutral wire, meter readings are line-to-line (not line-to-neutral). If the application requires a neutral lead, a wire can be connected to wire TO from the stator.
Adaptable To: Wire No. 26 can be removed from earlier generators using either the 7C1600 or 7C7557 Regulator Assemblies.
Caterpillar Information System:
1988/07/04 New 1U8758 Pliers Available For Removing And Installing Large Internal Retaining Rings In Power Shift Transmissions {0603,3150}
1988/07/04 New Service Tools Available {0600}
1988/07/04 Improvement To 2P5535 Stud Extractor Group {0700,4210}
1988/06/27 Charts And Decals Available For Lubrication And Maintenance Intervals{0370}
1988/06/20 Two 11 mm Injectors Available For Parts Service{1250,1290}
1988/06/20 Large Engine Blowby Group Available To Measure Crankcase Blowby And Radiator Air Velocity{0781,1200,1350}
1988/06/20 Software Upgrade For The 8T5282 Digital Diagnostic Tool (DDT){0600,1250}
1988/06/20 Maintenance-Free Batteries Require Different Troubleshooting Procedures{1401}
1988/06/13 Rotor Shaft Keyways Are Now "{4454}
1988/06/13 Additional Information For Installing Fuel Injectors{1290,1257}
1988/06/13 Piston Application Guide{1214,1215}
1988/06/13 New Crankshaft Damper Has Rubber Bonded To Hub And Ring{1202,1205}
1988/07/04 Fans Now Have Five Blades Instead Of Four {1356}
1988/07/04 Vehicle Speed Calibration Can Be Corrected Without Knowing Number Of Transmission Chopper Teeth {1250,3233}
1988/07/11 Seals In Variable Timing Advance Available For Parts Service{1272}
1988/07/18 Identification Film For EMS Panels Is Written In Four Languages {7490}
1988/07/25 Replacement Fuel Injector Nozzles With New Nose Cones Available{0706,1254,1290}
1988/07/25 High Pressure Sealed Cap Available For Nipples Used For Diagnostic Testing And S·O·S Oil Sampling{0781,0783,0784,7770}
1988/08/01 Silicone Water Seals Reinstated In Cylinder Heads{1115,1300}
1988/08/01 Ground Wire Added To SR 4 Generators With 580, 680, And 800 Frames{4478}
1988/08/08 Turbine Oil Seal Improved On Turbochargers{1053,1077}
1988/08/08 Stronger Oil Pan Available For Severe Applications{1201,1302,1307}
1988/08/08 New Recommendations For Bearing Lubrication And Adjustment{3055}
1988/08/08 New Frequency Meter Has Replaceable Voltage Droop Resistor{7471}