ALTERNATOR GP-CHARGING 3946466 - Caterpillar

Table 1
New High Efficiency     Previous Standard Efficiency    
1R1807     1R0739    
1R1808     1R0716    If you replace the 122-5053 Solenoid Valve Gp (INJECTION ACTUATION PRESSURE CONTROL VALVE), Caterpillar suggests installing the new stiffer 242-3864 Spring in the oil filter bypass valve of earlier engines. The oil filter bypass valve is located in the oil filter base assembly. The filter bypass valve allows the oil to bypass the engine oil filter when the oil is too thick, or if the oil filters become excessively plugged. The stiffer 242-3864 Spring increases the amount of filter restriction that is needed to open the oil filter bypass valve.The previously announced 242-3864 Spring for the engine oil bypass valve replaces the 9L-9188 Spring in new engines. The new 242-3864 Spring is adaptable to all earlier HEUI engines that are listed in the following chart:
Table 2
Engine Model for Cat Machine Engines     New Spring"Adaptable To" Serial Number Range     New Spring Effective Serial Number    
3126B     5GG1-043361     5GG04332-Up    
BMA1-09197 BMA09198-Up    
CSW1-00484 CSW00485-Up    
Illustration 1 g01058856
Typical example of the 242-3864 Spring (1) location in the Oil Filter Base