2005/10/31 Caterpillar

Engine:

3606 (S/N: 8RB1-UP)

3608 (S/N: 6MC1-UP; 8LL1-UP)

3612 (S/N: 9RC1-UP)

3616 (S/N: 1PD1-UP)

C280-16 (S/N: NKB1-UP; TDX1-UP)

Marine Engine:

C280-12 (S/N: TSJ1-UP; RDW1-UP)

C280-6 (S/N: SCB1-UP; LDL1-UP)

C280-8 (S/N: PKA1-UP; NDT1-UP)

Engine News SEBD9860, 20 October 2008, "Improved Pistons Are Used for Certain 3600 and C280 Engines". Disregard the previous article, refer to the article that follows.

Description of Change:

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NOTICE
Disregard Engine News, SEBD9327, "An Improved Piston is Used", this Engine News contains the most recent information and part numbers.

A piston with an improved ring pack is being used. The new piston uses a different ring pack that allows better dynamics of the ring for improved performance. Oil drain holes have also been added to the crown below the oil ring in order to help improve performance of the ring.

Adaptable To: The 314-2700 Piston will be used in all the above engines except for some Defense and Federal Products engines. The 314-2700 Piston is the same weight as all of the former pistons except the 218-3589 Piston. The 314-2700 Piston may be mixed with all of the former pistons except the 218-3589 Piston. The 314-2700 Piston cannot be mixed with the heavier 218-3589 Piston. When you change from a four ring piston to a three ring piston, the engine may develop high crankcase pressure. New breather groups are available now to improve the crankcase ventilation.

The 314-2700 Piston must be used with one of the following cylinder liners:

• 179-3167 Cylinder Liner

• 179-3168 Cylinder Liner

The 314-2700 Piston must be used with one of the following cylinder liner sleeves:

• 141-4857 Sleeve

• 175-5060 Sleeve

The 314-2700 Piston cannot be used with the 116-0682 Cylinder Sleeve .

Note: Currently, there are two 3600 Diesel pistons in production, the 314-2700 Piston and the 241-4949 Piston. Some Defense and Federal Products engines will use the 241-4949 Piston .The 314-2700 Piston has three rings. The former pistons and the new piston are listed in Table 1.

Table 1

Former pistons and New Piston
Former Pistons	Top Ring	Second Ring	Third Ring	Oil Ring
4P-0399	135-5149	129-3581	175-6597	111-0281
121-7555
121-4068
172-6772
218-3589 (1)
241-4949
197-6700	137-1574	137-1575	N/A	111-0281
New Piston
New Piston	Top Ring	Second Ring	Third Ring	Oil Ring
314-2700	314-2691	314-2692	N/A	314-2693

( 1 )

The 218-3589 Piston cannot be mixed with any other piston that is listed in the table.

Serial number effectivity for the 314-2700 Piston is listed in Table 2.

Table 2

Effectivity for the 314-2700 Piston
Sales Model	Serial Number
3606	S/N:8RB00996-UP
3606	S/N:LDL00106-UP
3606	S/N:SCB00100-UP
3608	S/N:6MC00783-UP
3608	S/N:NDT00111-UP
3608	S/N:PKA00106-UP
3612	S/N:9RC00493-UP
3612	S/N:RDW00107-UP
3612	S/N:TSJ00104-UP
3616	S/N:1PD00551-UP
3616	S/N:TDX00134-UP
3616	S/N:NKB00116-UP