2003/04/01 Caterpillar


New Piston and Rod Group that Improves Cold Weather Operation {1225}

Usage:

3406E 6BR
Industrial Engines:
3406E (S/N: 6BR1-UP)
C-15 (S/N: BEM1-UP)
Generator Set Engines:
3406E (S/N: 9NN1-UP; 1MZ1-UP)

Description of Change: A new piston and rod group is used in 3406E and C-15 engines. The new piston and rod group has a redesigned piston crown. The redesigned piston crown improves the cold weather operation of the piston.

Adaptable To: The new 176-5745 Piston and Rod Gp replaces the former 136-1562 Piston and Rod Gp. The new piston and rod group is effective with engine serial numbers (S/N: 6BR02455-UP; 9NN00445-UP; BEM01457-UP; 1MZ01088-UP). The new piston and rod group is adaptable to the previous engine serial numbers.

The new 176-5745 Piston and Rod Gp is not available for parts service. Order the individual components for parts service. Refer to Illustration 1 and Table 1 for the required parts.




Illustration 1g00986075

Table 1
Parts that are required for the new 176-5745 Piston and Rod Gp    
Item     Qty     Part Number     Description    
1     1     134-3761     Piston Ring    
2     1     176-5749     Piston Ring    
3     1     189-9771     Piston Ring    
4     1     9Y-6054 (1)     Connecting Rod    
5     1     221-2305     Piston Crown Assembly    
6     1     132-6663     Piston Skirt    
7     1     9Y-7735     Connecting Rod Bearing    
8     1     168-7246     Piston Pin    
9     2     7E-1177     Pin Retainer    
10     1     197-9336     Oil Jet Tube    
11     1     151-5925     Bolt    
( 1 ) The 9Y-6054 Connecting Rod includes the piston pin bearing, connecting rod, connecting rod cap, pins, and bolts.

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