Nozzle Piston 6731-21-1190

6731-21-1190 is a fuel injection nozzle piston for Komatsu equipment and Komatsu diesel engines. The part is used in the fuel injection system of the engine models listed below. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The nozzle piston is identified by part number 6731-21-1190 and is intended for installation in the specified Komatsu engine applications. The fitment information applies to the engine models and model variations listed in this description.

Fitment

The nozzle piston is used with the following Komatsu engine models:

• Komatsu 4D102E-1B
• Komatsu S4D102E-1D
• Komatsu S4D102E-1E-Z
• Komatsu S4D102E-1E-Z3
• Komatsu S4D102E-1E
• Komatsu S4D102E-1F-US
• Komatsu S4D102E-1F
• Komatsu S4D102E-1J
• Komatsu S4D102E-1K
• Komatsu S4D102E-1N-D

Before installation, the engine identification and the complete part number should be checked against the machine or engine documentation. The model suffix is included because the listed Komatsu engine versions are specified separately in the available application data.

Cross-reference numbers

The part is listed under the following number:

6731-21-1190 is used as the identification number for this nozzle piston in the available Komatsu application information and for the CTP aftermarket part supplied under this SKU.

Specifications