2008/02/11 Caterpillar

The Heavy Pistons are Cancelled {1214, 1225}

Usage:

Engine:
G3600

Engine News, SEBD9429, 15 January 2007, "New Pistons are Used". Disregard this article. Refer to the following article.

Description of Change: The pistons with a heavy piston skirt that are used in G3600 engines are discontinued. The heavy pistons have not been used in production since 1998. These pistons are no longer available.

The lighter replacement pistons will reduce the inertial load on the engine. Pistons with a 11:1 compression ratio are no longer available. G3600 engines with a 11:1 compression ratio must be converted to a 10.5:1 compression ratio.

Adaptable To: Table 1 lists the former pistons and the new pistons.

Note: All pistons must be changed in complete sets.

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Table 1
Former Parts and New Parts
Compression Ratio	Former Heavy Piston	New Light Piston
9.2:1	240-4644	290-2041
10.5:1	240-4645	290-2042
11.0:1	240-4643	290-2042 ⁽¹⁾

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^( 1 )

This piston will convert an engine with a 11.0:1 compression ratio to a 10.5:1 compression ratio.

Table 2 lists the sequence of the part numbers for the heavy pistons. Table 3 lists the sequence of the part numbers for the light pistons.

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Table 2
Sequence of the Heavy Pistons
Comp Ratio	Part Number
9.2:1	7C-7888 Cancelled	4P-8959 Cancelled	118-3517 Cancelled	150-2512 Cancelled	157-0726 Cancelled	204-5289 Cancelled	205-5807 Cancelled
9.2:1 cont.	240-4644 Cancelled	Use 290-2041
10.5:1	152-3826 Cancelled	204-5285 Cancelled	205-5808 Cancelled	240-4645 Cancelled	Use 290-2042
11.0:1	103-3422 Cancelled	110-1286 Cancelled	150-3002 Cancelled	157-1111 Cancelled	204-5283 Cancelled	205-5809 Cancelled	240-4643 Cancelled	Use 290-2042

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Table 3
Sequence of the Light Pistons
Compression Ratio	Part Number
9.2:1	156-1699 Cancelled	204-4436 Cancelled	204-6114 Cancelled	240-4641 Cancelled	290-2041 Latest
10.5:1	156-5753 Cancelled	201-5388 Cancelled	204-6117 Cancelled	240-4642 Cancelled	290-2042 Latest