2013/05/28 Caterpillar

New Flywheel Housing Assemblies and Gasket Are Used on Certain Marine and Petroleum 3500 Engines {1157, 7555}

Usage:

Engine: 3508B (S/N: S2D1-UP; S2E1-UP; S2F1-UP; 3DM1-UP) 3508C (S/N: TTA1-UP; TTB1-UP) 3512 (S/N: 50Y1-UP) 3512B (S/N: S2M1-UP) 3512C (S/N: TTE1-UP; TTF1-UP; TTG1-UP; MKH1-UP; SLM1-UP; E3W1-UP) 3516B (S/N: B5G1-UP) 3516C (S/N: TTD1-UP; PAG1-UP; TTH1-UP; TTJ1-UP; JTS1-UP; E3Z1-UP)

Description of Change: The new flywheel housing assembly along with the new gasket will provide a better seal to prevent oil leaks between the housing and block.

Adaptable To:

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Illustration 1	g03362527
(1) 309-4550 Gasket (2) 340-5015 Flywheel Housing

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Illustration 2	g03362719
(1) 309-4550 Gasket (3) 435-7753 Flywheel Housing As

The 309-4550 Gasket replaces the use of anaerobic sealant between the flywheel housing and the cylinder block.

ReferenceRefer to Special Instructions, REHS7873 for flywheel installation and modification procedures.Table 1 lists the new and original part numbers. Table 2 lists the effective serial numbers.

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Table 1
New Part Number	Original Part Number
340-5015 Flywheel Housing	222-9921 Flywheel Housing
435-7753 Flywheel Housing As	222-9933 Flywheel Housing As

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Table 2
Effective Serial Numbers
3508B	S/N:3DM00502-UP S/N:S2D00274-UP S/N:S2E00849-UP S/N:S2F00126-UP
3508C	S/N:TTA00275-UP S/N:TTB00549-UP
3512	S/N:50Y01828-UP
3512B	S/N:MKH00201-UP S/N:S2M00203-UP
3512C	S/N:E3W00328-UP S/N:SLM00132-UP S/N:TTE00208-UP S/N:TTF00542-UP S/N:TTG00290-UP
3516B	S/N:B5G00102-UP S/N:PAG00483-UP
3516C	S/N:E3Z00206-UP S/N:JTS00408-UP S/N:TTD00403-UP S/N:TTH00634-UP S/N:TTJ00243-UP