4N4405 Clutch A for Caterpillar Equipment

Clutch A 4N4405 is a starter clutch used in air starter motor assemblies to engage the engine flywheel during engine cranking. The part fits equipment manufactured by Caterpillar, including cold planers, earthmoving compactors, and Caterpillar engine-machine applications.

This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts). The component is identified as Clutch A and is intended for installation within the starter assembly of compatible Caterpillar equipment.

Fitment

The clutch is listed for the following Caterpillar equipment types and models:

• Caterpillar cold planers
• Caterpillar earthmoving compactors
• Caterpillar engine-machine applications
• Caterpillar PR-1000
• Caterpillar PR-1000C
• Caterpillar 826C
• Caterpillar 3208 engine applications
• Caterpillar 3306 engine applications
• Caterpillar 3406 engine applications
• Caterpillar 3406B engine applications
• Caterpillar 3406C engine applications
• Caterpillar 3408 engine applications
• Caterpillar 3408C engine applications

Fitment should be confirmed against the equipment model, engine configuration, and starter motor assembly before installation. The listed model and engine references indicate the equipment applications associated with this clutch, while the starter assembly determines the exact installation position.

Cross-reference numbers

4N4405 and 4N-4405 refer to the same listed part number in different formatting. No additional supplier or equipment-manufacturer cross-reference numbers are specified in the available product data.

Specifications

The supplied dimensions are 4.5 inches in length, 2.3 inches in outer diameter, 15 cm in length, 6 cm in width, and 6 cm in depth. The listed weight is 2.7 lb. The product data does not specify the material, thread dimensions, internal components, or additional items included with the part.