Product Overview

The 324-0355 hydraulic cylinder seal kit (also written 3240355) is a factory-manufactured aftermarket replacement kit cross-referenced against the genuine Caterpillar part number 324-0355. The OEM Caterpillar store (parts.cat.com) lists 324-0355 as a standard-size hydraulic cylinder seal kit, and its fitment line covers Cat wheel loaders and backhoe-loader families. Independent parts listings consistently pair the number with the Cat 924K and 930K wheel loaders and with the Cat 422E / 422F / 428E / 428F / 432E / 432F / 434E / 434F / 442E / 444E / 444F backhoe-loading family (avspare.com, FridayParts, Amazon, AliBaba, hitachpart). The current DJF page titles the kit for Cat wheel loaders and the 422E-444F backhoe-loader family (see Fitment Verification for the cylinder-position wording conflict).

DJF Seals manufactures and supplies the 324-0355 kit at factory-direct wholesale pricing for Cat equipment dealers, repair shops and fleet maintenance programs.

Verified Application

The following application data was cross-checked against the OEM Caterpillar store (parts.cat.com), a genuine-Cat eBay listing and aftermarket parts listings (avspare.com, FridayParts, aztechydraulics, Amazon, AliBaba, hitachpart):

Dimensions, materials, pressure rating, temperature range, exact piece counts, certifications and service life are factory data and are not independently verified for this part number; such claims on the current page are not repeated here (see Fitment Verification).

Replacement Scope

This kit supplies the sealing elements needed to reseal the hydraulic cylinder it is matched to on the verified Cat models. Sellers differ on which cylinder the number serves: the OEM fitment line and aztechydraulics name the bucket cylinder, while several aftermarket listings say bucket / boom / arm. Because the position wording conflicts across sources, the cylinder position on the machine must be confirmed before ordering. Kit contents vary between suppliers, so the exact component set is matched to your cylinder before shipment.

Fitment Verification

The part number, identity and fitments above were cross-checked against the following sources:

• parts.cat.com (OEM Caterpillar store): product listing “324-0355: Hydraulic Cylinder Seal Kit – Standard Size”; the extracted fitment line reads “Bucket / Excavator 320E LRR 311F LRR / Wheel Loader 924K 930K.” The full OEM fitment table was not accessible in this review, so only the title-level line above is cited.
• eBay (genuine Cat kit listing): the title mirrors the OEM line — “BUCKET, EXCAVATOR 320E LRR 311F LRR, WHEEL LOADER 924K 930K.”
• avspare.com: KIT-SEAL 3240355 for Cat 422E / 422F / 428E / 428F / 432E / 432F / 434E / 434F / 442E / 444E / 444F, 924K and 930K.
• FridayParts, Amazon, AliBaba and hitachpart listings repeat the backhoe-loader family plus 924K / 930K model set with “bucket / boom / arm” wording.
• aztechydraulics: sells the 324-0355 kit titled “Seal Kit for Bucket Cylinder” (fitment table not rendered in this review).
• Conflict note: cylinder-position wording conflicts — the OEM line and aztechydraulics name the bucket cylinder, while several aftermarket listings say bucket / boom / arm. The position is therefore kept as wording in the Verified Application table and must be checked on the machine.
• Conflict note: the excavator lines “320E LRR and 311F LRR (bucket)” appear only in the OEM extract and the genuine-Cat eBay title among the reviewed sources; the wheel-loader and backhoe-loader coverage is the multi-source set and is what the copy above asserts.
• Conflict note: material claims on the current page (PU / NBR / PTFE) and any dimension or pressure figures are factory data not independently verified, so they are not asserted.
• Materials, pressure, temperature, exact piece counts, certifications and service life are not independently verified.

Factory Inspection & Packing

Each 324-0355 kit is assembled and checked at the DJF factory before packing. Sealing elements are placed in labeled poly bags marked with the part number, then packed into export cartons for protection during international shipping. Kits can be packed under DJF branding, neutral packaging, or your own private label for distribution.

Wholesale Ordering

DJF Seals supplies the 324-0355 kit at factory-direct wholesale pricing for distributors, dealers and repair shops. To request a quotation, send your part number and quantity to [email protected] or [email protected]. OEM/ODM service, custom packaging and bulk container shipping are available for regular programs.

MOQ

MOQ: 5 kits.

FAQ

Q: Which machines does the 324-0355 seal kit fit?
A: Multiple sources (avspare.com, FridayParts and related listings) fit the kit to the Cat 924K and 930K wheel loaders and to the Cat 422E / 422F / 428E / 428F / 432E / 432F / 434E / 434F / 442E / 444E / 444F backhoe-loader family; the OEM line additionally reads bucket / excavator 320E LRR 311F LRR.

Q: Is 3240355 the same part as 324-0355?
A: Yes — 3240355 is the same Caterpillar number written without the dash in several listings.

Q: Which cylinder does this kit seal?
A: Sellers disagree: the OEM line and aztechydraulics say bucket, while several aftermarket listings say bucket / boom / arm. Confirm the cylinder position on your machine before ordering.

Q: Is 324-0355 a genuine Cat number?
A: Yes. The OEM Caterpillar store (parts.cat.com) lists 324-0355 as a hydraulic cylinder seal kit (standard size), and DJF supplies an aftermarket replacement for it.

Q: What is the minimum order quantity?
A: MOQ: 5 kits.