TUBE 1R8899 - Caterpillar

Table 1
20R-0629 Cylinder Pack As (18:1 Compression Ratio)    
New Part Number Included     Existing Part Number     Part Description    
20R-0629     10R-8760     Cylinder pack    
368-7818     329-4511     Piston    
250-2940     230-2569     Retainer     The new 20R-0631 Cylinder Pack As is adaptable back to first production on the serial numbers that are listed above. Refer to Table 2 for information on the new cylinder pack assemblies and the parts that are replaced.
Table 2
20R-0631 Cylinder Pack As (16.3:1 Compression Ratio)    
New Part Number Included     Existing Part Number     Part Description    
20R-0631     10R-8763     Cylinder pack    
368-7816     329-4510     Piston    
250-2940     230-2569     Retainer    
Illustration 1 g02552100
Shape of the existing piston that is replaced
Illustration 2 g02552196
Shape of the new piston with the lower ring land supportRefer to Tables 3 and 4 for information on the parts that are included in the new cylinder pack assemblies.
Table 3
Components within the 20R-0629 Cylinder Pack As    
Part Number     Description     Quantity    
10R-2117     Connecting Rod     1    
180-7350     Piston Pin     1    
223-9159     Top Piston Ring     1    
238-2707     Int. Ring     1    
246-5659     Oil Ring     1    
250-2940     Pin Retainer     2    
368-7818     Piston Body As     1    
322-1126     Cylinder Block Liner     1    
258-8117     Gasket Kit     1    
Table 4
Components within the 20R-0631 Cylinder Pack As    
Part Number     Description     Quantity    
10R-2117     Connecting Rod     1    
180-7350     Piston Pin     1    
223-9159     Top Piston Ring     1    
238-2707     Int. Ring     1    
246-5659     Oil Ring     1    
250-2940     Pin Retainer     2    
368-7816     Piston Body As     1    
322-1126     Cylinder Block Liner     1    
258-8117     Gasket Kit     1