4N6640 Muffler for Caterpillar Equipment

The 4N6640 is a muffler used in the exhaust system of Caterpillar track-type tractors, wheel-type loaders, and track loaders. It is listed for Caterpillar equipment identified by the model designations 3, 3P, 3S, 53, D3, D3B, D3C, D3C II, 910, 931, 931B, 931C, and 931C II. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

Fitment

The part is associated with the following Caterpillar equipment groups and model designations:

The application data identifies the muffler for Caterpillar D3B, D3C, 910, and 931B equipment. The broader model list also includes the related model designations shown above, including D3, D3C II, 931, 931C, and 931C II.

• Caterpillar D3 series: D3, D3B, D3C, D3C II
• Caterpillar 900-series track loaders: 931, 931B, 931C, 931C II
• Caterpillar 910 wheel-type loader: 910
• Other listed track-type tractor designations: 3, 3P, 3S, 53

Cross-reference numbers

The muffler is identified by the SKU 4N6640 and by the hyphenated part-number format 4N-6640. These number formats refer to the same catalog reference, with the difference being the placement of the hyphen.

When checking equipment records, both 4N6640 and 4N-6640 should be considered during parts identification. The available application data associates these references with the Caterpillar muffler listed for the equipment models in the fitment section.

Specifications

The listed overall dimensions are 332.74 mm in height, 497.84 mm in width, and 830.58 mm in length. These measurements apply to the 4N6640 muffler reference described for the specified Caterpillar equipment. No additional material, thread, mounting-hardware, weight, or kit-content information is provided for this part.