2013/12/23 Caterpillar

Generator Set:

3412 (S/N: 4BZ1-UP)

Engine:

3408 (S/N: 67U1-UP)

3408B (S/N: 67U1-UP)

3408C (S/N: 67U1-UP)

3412 (S/N: 38S1-UP)

3412C (S/N: DJN1-UP; RLR1-UP; RTY1-UP)

3412E (S/N: TGC1-UP)

Industrial Engine:

3412C IND (S/N: 38S1-UP)

Marine Engine:

3412D MARINE (S/N: REA1-UP)

Engine News SEBD9918, 12 December 2013, "New Exhaust Shield Assemblies Are Used on Certain 3408 and 3412 Engines". The original article has been revised to update the effective serial numbers.

Description of Change: The new exhaust shield assemblies reduce the heat exposure to the valve cover seals.

Adaptable To: The new 441-1501 Shield As and 437-0294 Shield As are adaptable back to first production of the serial numbers listed above. Refer to Table 2 for the effective serial numbers.

Table 1

Required Parts
Qty	Part Number
6	1B-9575 Bolts
6	3E-4352 Hard Washers
6	3L-0593 Spacers
1	437-0294 Shield As
1	441-1501 Shield As

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Illustration 1	g03438898
Left-hand side spacer install (1) 3L-0593 Spacers

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Illustration 2	g03438639
Left-hand side heat shield install (2) 437-0294 Shield As (3) 1B-9575 Bolts (4) 3E-4352 Hard Washers

1. Install exhaust shield assembly (1) onto the left-hand side of the engine. Install three spacers (1) under shield (2). Attach the exhaust shield assembly to the valve cover base using three bolts (3) and three washers (4) .

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Illustration 3	g03438899
Right-hand side spacer install (1) 3L-0593 Spacers

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Illustration 4	g03438641
Right-hand side heat shield install (3) 1B-9575 Bolts (4) 3E-4352 Hard Washers (5) 441-1501 Shield As

2. Install exhaust shield assembly (5) onto the right-hand side of the engine. Install three spacers (1) under heat shield (5). Attach the exhaust shield assembly to the valve cover base using three bolts (3) and three washers (4) .

Table 2

Effectivity
S/N:RTY04104-UP
S/N:TGC01101-UP