Product Overview

DJF Seals supplies the 231-6844 hydraulic cylinder seal kit as a factory-direct aftermarket replacement for Caterpillar excavator cylinders. Cat’s own parts catalog lists 231-6844 as a hydraulic cylinder seal kit (standard size), and aftermarket hydraulic suppliers consistently cross-reference the number to the arm (stick) cylinder of Caterpillar excavators, most commonly the 330D and 336D series. As a seal kit manufacturer, DJF supports wholesalers, repair centers and equipment dealers with consistent factory supply and bulk pricing.

Verified Application

Multiple independent sources support this identification. parts.cat.com lists 231-6844 as a hydraulic cylinder seal kit (standard size). Aztec Hydraulics titles the part as a seal kit for the arm (stick) cylinder, and Winschen lists it as a stick/arm cylinder seal kit for Caterpillar 324D, 325C, 330C, 330D and 336D excavators. Aftermarket listings on eBay, Amazon and TractorPartsASAP cite the same number for 324D, 325C, 325CL, 325D, 325DL, 330C, 330CL, 330D, 330DL, 336D and 336DL, with 330D and 336D appearing most often. Note that some aftermarket listings write the models with an E prefix (E330D, E336D); Caterpillar’s official model designations are 330D and 336D.

Replacement Scope

This kit supplies the sealing elements required to reseal the arm (stick) cylinder. Kit contents vary between suppliers, so the exact component set is verified against the order and the machine’s cylinder group before shipment. For a correct match, compare the kit with the seals removed from the cylinder and check the cylinder group part number in the Cat parts system or on the machine.

Fitment Verification

Verify the OEM part number 231-6844 against your parts list or the cylinder body before ordering. The arm (stick) cylinder of the 330D and 336D excavators is the documented application in the sources reviewed. If your machine is a different model, send the cylinder number or part number to our team and we will check compatibility before shipment.

Factory Inspection & Packing

Each DJF 231-6844 seal kit is produced in our factory and inspected before packing. Kits are individually packed and labeled with the part number, then boxed for export. Custom packing and labeling can be arranged for wholesale orders.

Wholesale Ordering

DJF Seals is a seal kit manufacturer offering factory-direct supply for distributors, repair shops and dealers. For a quotation on the 231-6844 kit, email [email protected] or [email protected], or contact us by phone, WeChat or WhatsApp at +86 15302478615.

MOQ

MOQ: 5 kits. Larger volumes may be split across part numbers in a single order; contact our sales team for quantity pricing and lead times.

FAQ

Q1: Is 231-6844 the OEM Caterpillar part number?

A1: Yes — 231-6844 is the Caterpillar reference; DJF supplies an aftermarket replacement kit under the same part number, matched for the arm (stick) cylinder application.

Q2: Which excavator models does this kit fit?

A2: The sources reviewed list Caterpillar 330D and 336D as the primary applications, with 324D, 325C, 325CL, 325D, 325DL, 330C and 330CL also cited by aftermarket suppliers.

Q3: Can other Caterpillar seal kits be added to the same order?

A3: Yes — we produce seal kits for a wide range of excavator and heavy equipment cylinders; send your part numbers for a combined quotation.

Q4: How should I check fitment before ordering?

A4: Compare the kit with the seals removed from the cylinder and check the cylinder group part number; our team can also verify the match by part number before shipment.