2N5775 Dowel Fits Caterpillar Models

One New Aftermarket Replacement Dowel Pin for Caterpillar (Cat) 3400 Series Engines

This aftermarket replacement dowel pin fits Caterpillar 3400 Series diesel engines and is used in the cylinder head assembly as a valve bridge guide dowel. The pin is pressed into the cylinder head and provides the precision locating surface on which the valve bridge rides during engine operation. Correct fitment is critical - verify your engine serial number before ordering, as certain later-production 3408C, 3412C, 3408E, and 3412E engines were redesigned to use longer intake and exhaust valves instead of a valve bridge and dowel arrangement.

Specifications

• Diameter: 0.433 in.
• Length: 2.75 in.

Compatible Models

Caterpillar 3400 Series Engines: 3406, 3408, 3412

Serial Number Note: This dowel pin is used on older-design cylinder heads. The following serial number prefixes indicate engines that may NOT use this dowel and instead use longer valves - verify before ordering. 3408C: 1LG, 1TS, 2BG, 8RG, 9ER, 9TD, 9XM, 67U, 78Z, 99U. 3412C: 2WJ, 3JK, 5RL, 7BL, 8AR, 9BR, 9XF, 38S, 60M, 81Z. 3408E and 3412E (HEUI): Consult serial and arrangement numbers before ordering.

Replaces Part Number(s):

2N5775

Aftermarket Interchange Numbers

PAI 340130, FP-2N5775 (FP Diesel / Federal Mogul), 2N5775-005 (oversized 0.005 in. variant - verify application)

New aftermarket replacement part - not remanufactured, not used.