5I4171 Hydraulic Piston Assembly for Caterpillar

The 5I4171 hydraulic piston assembly is used in equipment manufactured by Caterpillar, including the Caterpillar 3306 engine series and Caterpillar 330 and 330 L excavator models. This is a new aftermarket spare part manufactured by CTP (Costex Tractor Parts).

The part is listed as a piston assembly for hydraulic barrels and pistons. The supplied application data identifies Caterpillar equipment as the compatible equipment brand and specifies the 3306, 330, and 330 L model designations. Final compatibility should be checked against the machine serial number and the dimensions of the part being replaced.

Fitment

• Caterpillar 3306
• Caterpillar 330
• Caterpillar 330 L

The listed models represent the available fitment information for SKU 5I4171. The data does not specify a particular machine position, hydraulic cylinder location, production year, or serial-number range, so these details are not included.

Cross-reference numbers

The numbers 5I4171 and 5I-4171 refer to the same listed piston assembly designation. No additional supplier or equipment-manufacturer numbers are provided in the available product data.

Specifications

The stated dimensions are length, width, and depth of the listed piston assembly. The available specification does not identify the measurement points, dimensional tolerances, piston material, surface treatment, thread details, seal configuration, or other included components. The product data also does not indicate that seals, rings, fasteners, or a complete hydraulic cylinder are included with the piston assembly.

Before installation, compare the part number 5I4171, the 5I-4171 number format, the listed dimensions, and the machine identification with the component removed from the Caterpillar equipment. The model designation alone may not establish compatibility where different configurations or serial-number ranges are used.