CONNECTOR 8C6869 - Caterpillar

Caterpillar Products:
3500 Family Pumpers
3500 and 3500B Family Generator Sets and Power Modules with Standard Displacement Engine: Commercial
3500 and 3500B Engines with Standard DisplacementEngine News SEBD9327, November 2003, "Introduction of New Pistons and Remanufactured Cylinder Packs". Disregard this article. The pistons in this article have been cancelled and replaced with new pistons. Refer to the following article for the correct information.Description of Change:
Illustration 1 g01026917
A new piston has been introduced for 3500 Engines. The forged steel piston is a one-piece piston. A large circumferential slot separates the crown and the skirt. The crown and the skirt remain attached by the strut for the pin bore. The new top ring is steel and very sensitive to bending. The ring expander tool must be used in order to install the top ring. Failure to use the ring expander tool will result in early hour failure of the piston ring. This will result in engine failure. Refer to table 1 for the part numbers of the tools that are used in servicing the piston.
Table 1
Service Tools    
Pt. No.     Description    
6V-4020     Piston Ring Expander Gp    
6V-4023     Handle As    
6V-4024     Guide Ring    
1P-1861     Retaining Ring Pliers    
1U-7616     Piston Ring Compressor Gp    Adaptable To: The new pistons are a direct replacement for previous pistons that are used in 3500 Engines. The new pistons have the same balance weight as the previous pistons. The new pistons can be used in the same engine with the previous pistons. Table 2 lists the usage of the new piston and rod groups and the former piston and rod groups. The new remanufactured cylinder packs that include the new piston and the former remanufactured cylinder packs are also listed.Note: The diameter of the eye in the connecting rod has not changed.Note: The new piston cannot be used in 3500B High Displacement Engines.
Table 2
Status     3500 MUI
3500 with EUI     3500B    
New Part     282-0645 Piston and Rod Gp     281-6139 Piston and Rod Gp    
Former Part     223-6362 Piston and Rod Gp     223-6363 Piston and Rod Gp    
New Remanufactured Part     10R-4378 Cylinder Pack Gp     10R-4343 Cylinder Pack Gp    
Former Remanufactured Part     10R-1816 Cylinder Pack Gp     10R-1817 Cylinder Pack    Note: The 282-0645 Piston and Rod Gp, and the 281-6139 Piston and Rod Gp cannot be ordered as groups. Each part must be ordered individually.Note: Some of the parts that were used with the former pistons are still serviceable for repair. The following parts are still serviceable: 263-8955 Piston Pin, 253-1238 Pin Retainer, 214-6066 Piston Ring (Top), 144-5695 Piston Ring (Intermediate ring) and 223-6361 Piston Ring (Oil). The new pistons reuse the 204-5447 Piston Cooling Jet As and the 193-3282 Retainer As (Piston Cooling Jet) that are part of the piston and rod group.The 10R-4378 Cylinder Pack Gp and the 10R-4343 Cylinder Pack Gp are ordered as a group. The