1T0406 Torque Converter Impeller

The 1T0406 is a torque converter impeller for Caterpillar equipment. It is used on Caterpillar machines and equipment identified with the models and machine series listed below. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The component is listed for use in torque converter assemblies installed on Caterpillar engine machines, track-type skidders, and track-type tractors. The available application data identifies the part by the Caterpillar model designations 3304, D4HTSK III, 4S, D4H III, and D4H XL.

Fitment

• Caterpillar 3304 equipment
• Caterpillar D4HTSK III equipment
• Caterpillar 4S equipment
• Caterpillar D4H III equipment
• Caterpillar D4H XL equipment
• Caterpillar engine machines
• Caterpillar track-type skidders
• Caterpillar track-type tractors

Fitment should be checked against the machine model, serial-number range, and the configuration of the torque converter assembly before installation. The available product data confirms the model and equipment designations above but does not provide a serial-number range or a complete assembly breakdown.

Cross-reference numbers

Numbers 1T0406 and 1T-0406 identify the same part-number sequence, with the hyphenated format commonly used for Caterpillar equipment references. No additional supplier numbers or separate replacement numbers are provided in the available data.

Specifications

The listed dimensions describe the supplied part as recorded in the product data. The available specification does not state the impeller material, blade count, internal spline details, mounting-hole pattern, or other assembly measurements. These parameters should be verified against the removed component and the applicable Caterpillar parts documentation when required.