Rotor Shaft Keyways Are Now "{4454}
Usage:
SR4 Generators Equipped With Small Brushless Exciters
All SR4 generators now have a 3/8" keyway for alignment between the rotor shaft and the exciter rotor. The 1/2" keyway was previously used.
In order to service SR4 generators in the field:
...parts replacement of the main rotor will include an exciter rotor with a 3/8" inch key.
...parts replacement of an exciter rotor will include two keys: a 3/8" key and a 1/2" to 3/8" stepped key. The 3/8" key can be used for the new main rotors having the 3/8" keyway. The stepped key can be used with the former main rotors with the 1/2" keyway.
The exciter rotors with the following part numbers will be supplied with two keys:
Caterpillar Information System:
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}
1988/06/06 Silicone Water Passage Seal Can Be Used Where Contact With Oil Is Unavoidable During Assembly Of Cylinder Heads{1100}
1988/06/06 Reusability Guidelines For Phosphate/Oil-Coated And Zinc-Plated Fasteners{7553}
1988/06/06 Lubricant Supplements List Specifications For CXP Lubricants{0645,7000}
1988/06/06 Installation Of Valves For Live Oil Sampling{7770,0770,0781,0783,0784}
1988/05/23 New Adapters Have Orifice To Extend Life of Fuel Pressure Gauges{7456}
1988/05/23 New Components Used In Water Lines Groups{1350}
1988/05/23 Ways To Prevent Overcooling Of 3306B (63Z, 76R) Truck Engines{1355}
1988/05/23 New Engine Lifting Bracket Available{0632}
1988/05/23 Larger Capacity Refrigerant Charging Cylinders Available For Charging Air Conditioner Systems{0647,7320}
1988/06/20 Maintenance-Free Batteries Require Different Troubleshooting Procedures{1401}
1988/06/20 Software Upgrade For The 8T5282 Digital Diagnostic Tool (DDT){0600,1250}
1988/06/20 Large Engine Blowby Group Available To Measure Crankcase Blowby And Radiator Air Velocity{0781,1200,1350}
1988/06/20 Two 11 mm Injectors Available For Parts Service{1250,1290}
1988/06/27 Charts And Decals Available For Lubrication And Maintenance Intervals{0370}
1988/07/04 Improvement To 2P5535 Stud Extractor Group {0700,4210}
1988/07/04 New Service Tools Available {0600}
1988/07/04 New 1U8758 Pliers Available For Removing And Installing Large Internal Retaining Rings In Power Shift Transmissions {0603,3150}
1988/07/04 Neutral Lead (Wire No. 26) Eliminated On VR3 And VR4 Voltage Regulators {4453,4474}
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}