1684540 Crown As-Piston Fits Caterpillar Models

One New Aftermarket Replacement Crown As-Piston for Caterpillar (Cat) 3406 Series Engines

This aftermarket piston crown (Crown As-Piston) is a direct replacement for Caterpillar OEM part number 1684540. The piston crown forms the top of the two-piece articulated piston assembly used in Caterpillar 3406-series diesel engines, sealing the combustion chamber and withstanding the high thermal and pressure loads of heavy-duty diesel operation. This part is used across a wide range of Caterpillar equipment powered by the 3406 and related engine families, including wheel loaders, track-type tractors, wheel dozers, soil compactors, landfill compactors, and pipelayers.

Specifications

• Weight: approximately 6.4 lbs (2.88 kg)
• Dimensions: approximately 7.55 x 7.55 x 6.85 in (191.77 x 191.77 x 173.99 mm)
• Part Type: Piston Crown (two-piece articulated piston assembly)

Compatible Models

Caterpillar Wheel Loaders: 980C, 980G

Caterpillar Wheel Dozers: 824C, 824G

Caterpillar Track-Type Tractors: D8N, D8R, D8R II

Caterpillar Soil Compactors: 825G

Caterpillar Landfill Compactors: 826C, 826G

Caterpillar Pipelayers: 578, 583R

Caterpillar Engines (all equipment powered by): 3406, 3406C

Replaces Part Number(s):

1684540, 168-4540

Aftermarket Interchange Numbers

0R3757, 0R9847, PLG1684540, M-1684540, KM4540

New aftermarket replacement part - not remanufactured, not used.