1559504 Insert-Int Fits Caterpillar Models

One New Aftermarket Replacement Intake Valve Seat Insert for Caterpillar (Cat) 3126 / C7 Engines

This aftermarket replacement intake valve seat insert (Cat part number 1559504 / 155-9504) fits in the cylinder head of Caterpillar 3126, 3126B, 3126E, and C7 diesel engines. The valve seat insert provides the precision seating surface for the intake valve, maintaining compression and combustion efficiency. Also known as an inlet valve seat, it is a critical cylinder head component during engine rebuilds and top-end repairs.

Specifications

• Dimensions: 3.5 x 6 x 0.08 in.
• Weight: 0.1 lbs.
• Position: Intake (Inlet)
• Application: Cylinder Head
• Cat OEM designation: 6.5mm Thick Inlet Valve Seat Insert

Compatible Models

Caterpillar Engines: 3126, 3126B, 3126E, C7 (Industrial, On-Highway, Marine, Petroleum)

Caterpillar Excavators: 322C, 322C FM, 324D, 324D FM, 324D LN, 325C, 325C FM, 325C L, 325D, 325D FM, 325D L, 325D MH, 326D L, 328D LCR, 329D, 329D L, 329D LN

Caterpillar Track-Type Tractors: D5N, D6N

Caterpillar Wheel Loaders: 938G II, 950G II, 962G II

Caterpillar Track Loaders: 953C, 963C

Caterpillar Integrated Toolcarriers: IT38G II, IT62G II

Caterpillar Wheeled Excavators: M325C, M325C MH, M325D MH, M325D L MH

Caterpillar Pipelayers: 561N

Caterpillar Motor Graders: 120H, 135H

Caterpillar Skidders: 525C, 535C, 545C

Caterpillar Combines: 460, 465, 470

Caterpillar Asphalt Pavers: AP-1000D, AP-1055D

Caterpillar Generator Sets: 3126B Generator Set

Replaces Part Number(s):

1559504, 155-9504, 1478219

New aftermarket replacement part - not remanufactured, not used.