IDLER & BEARING AS 2649821 - Caterpillar

Illustration 1 g03736132
Example of the DEF filterTable 1 contains the part numbers needed for this change. Note: Only one DEF filter group is required per engine. Use Table 2 to determine which filter is the appropriate filter for each DEF header. Illustration 2 shows the location of the DEF header part number.ReferenceRefer to Special Instruction, REHS9664 for installation instructions.
Table 1
Item    Qty    Part Number    Part Description    
1     1     378-3187     Diesel Exhaust Fluid Filter Gp    
2     1     391-5262     Gasket    
3     1     423-3251     Connector    
4     1     425-0385     Filter As    
5     1     452-6055     Filter Base As    
6     1     453-1604 (1)     Diesel Exhaust Fluid Filter Gp    
7     1     453-1605 (1)     Diesel Exhaust Fluid Filter Gp    
8     1     453-1606 (1)     Diesel Exhaust Fluid Filter Gp    
( 1 ) Use Table 2 to choose the correct part that corresponds to the DEF header
Illustration 2 g03745839
(1) Location of DEF header part number
Table 2
DEF Header Part Number    Required DEF Filter    
434-3241     453-1604    
434-3242     453-1605    
434-3243     453-1606    The effective serial numbers for this change are related to the Pump Electronic Tank Unit (PETU) serial numbers and not the machine serial numbers. Table 2 contains the effective serial number for the PETU tank. Below are examples of where to locate the PETU serial number.
Illustration 3 g03745677
Example of the serial number location on an Integrated PETU
Illustration 4 g03745710
Example of the serial number location on a Remote PETU
Table 3
PETU Effective Serial Numbers    
S/N:PET007086T-UP