LOCKNUT 5J3488 - Caterpillar

Engine:
C27 All
C32 AllEngine News SEBD9935, 28 March 2014, "New Fuel Transfer Pumps Are Now Used for Certain Commercial Engines". Disregard this article, engine effectivity has been updated.Description of Change: The new fuel transfer pumps are a more robust alternative when used with low lubricity fuel and also provide increased fuel flow during cranking conditions.Adaptable To: The new fuel transfer pumps are adaptable back to first production of the engines that are listed above.The new 394-1397 Fuel Transfer Pump Gp is a direct replacement for the previous 286-2531 Fuel Transfer Pump Gp .The new 394-1398 Fuel Transfer Pump Gp is a direct replacement for the previous 331-3635 Fuel Transfer Pump Gp .The new pumps and old pumps are listed in Table 2.
Table 1
New Fuel Pump    Old Fuel Pump    
394-1397 Fuel Transfer Pump Gp     286-2531 Fuel Transfer Pump Gp    
394-1398 Fuel Transfer Pump Gp     331-3635 Fuel Transfer Pump Gp    This change is effective with the serial numbers listed in Table 2.
Table 2
Effective Serial Numbers    
S/N:RNX01050-UP    
S/N:RSD00194-UP    
S/N:RPM00171-UP    
S/N:PRH04287-UP    
S/N:SDN00435-UP    
S/N:TLD01327-UP    
S/N:ZRS00438-UP    
S/N:SYC05994-UP    
S/N:NST00131-UP    
S/N:TWM04300-UP    
S/N:MJE03858-UP    
S/N:SDK00247-UP    
S/N:C3200113-UP    
S/N:PEY00102-UP    
S/N:RNY02605-UP