SEAL-REAR AXLE 9R9402 - Caterpillar

Gen Set EngineC18 MARINE GS (S/N: CYN1-UP)Generator SetC18 MARINE GS (S/N: GBM1-UP; GEN1-UP; MGS1-UP)Industrial EngineC18 (S/N: GJE1-UP; EJG1-UP)C18 INDUSTRIAL (S/N: JDA1-UP; NBB1-UP; WJH1-UP; WRH1-UP)Locomotive EngineC18 LOCOMOTIVE (S/N: EWS1-UP)Marine EngineC18 MARINE (S/N: PLE1-UP; CKH1-UP; GES1-UP; KJT1-UP)C18 MARINE ENG (S/N: J2K1-UP; T2P1-UP)Petroleum EngineC18 PETROLEUM (S/N: WJW1-UP; WJY1-UP)Reference: Disassembly and Assembly, "Pistons and Connecting Rods - Install"Reference: Special Instruction, REHS9671 for the proper break-in procedure for all packs listed herein.The new 20R-0629 Cylinder Pack As, 20R-0630 Cylinder Pack As, 20R-0631 Cylinder Pack As, and 20R-0632 Cylinder Pack As are composed of a single piece steel piston with a lower ring land support.Note: Due to a difference in the weight of the new pistons and existing pistons, the new piston must not be matched with the existing pistons. All the pistons must be replaced in an engine as a set.The new 20R-0629 Cylinder Pack As is adaptable back to first production on the serial numbers that are listed above. Refer to Table 1 for information on the new cylinder pack assemblies and the parts that are replaced.
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-0630 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-0630 Cylinder Pack As (16.5:1 Compression Ratio)
New Part Number Included Existing Part Number Part Description
20R-0630 10R-9025 Cylinder pack
368-7817 461-9954 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 3 for information on the new cylinder pack assemblies and the parts that are replaced.
Table 3
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 The new 20R-0632 Cylinder Pack As is adaptable back to first production on the serial numbers that are listed above. Refer to Table 4 for information on the new cylinder pack assemblies and the parts that are replaced.Note: The 20R-0632 Cylinder Pack As is not for use in S/N:CKH, ; S/N:PLE, or ; S/N:JKX engines above 900 hp.
Table 4
20R-0632 Cylinder Pack As (14.5:1 Compression Ratio)
New Part Number Included Existing Part Number Part Description
20R-0632 10R-9024 Cylinder pack
368-7815 461-9953 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 support
Refer to Tables 5 through 8 for information on the parts that are included in the new cylinder pack assemblies.
Table 5
Components within the 20R-0629 Cylinder Pack As
Part Number Description Quantity
10R-2117 Connecting Rod 1
180-7350 Piston