RING-WEAR 8C4820 - Caterpillar

Illustration 1 g01362870
Oil pump with out drilled oil gallery
Illustration 2 g01362873
Oil pump with drilled oil galleryThe following 3406 oil pumps that are listed in Table 1 do not require a housing with a drilled oil passage. The pumps that are listed in Table 1 can be remanufactured with either housing. However, if you receive a 3406 oil pump with a housing that has a drilled oil gallery, then the 2S-7905 Pipe Plug (1) must be in place. Refer to Illustration 3. If the plug is not in place, the pump will move oil but the pressure is lost because the oil is not diverted to the proper oil gallery.
Illustration 3 g01362898
(1) 2S-7905 Pipe Plug
Table 1
3406 Oil Pumps
Plugged Oil Passage    
Remanufactured Part Number     New Part Number    
0R-9448     161-4111    
0R-9449     161-4113    
0R-9450     161-4110    
0R-9697     161-4112    
10R-0428     198-1508    The following pumps that are listed in Table 2 require a housing with a drilled oil gallery. The pumps that are listed in Table 2 must be manufactured with the housing that has the 2S-7905 Pipe Plug that is installed.
Table 2
3408/3412 Oil Pumps
Open Oil Passage    
Remanufactured Part Number     New Part Number    
0R-8804     7C-1772    
0R-4999     6N-1030    
10R-1088     202-3575    
0R-3538     7C-1531