Product Overview

The RG518-67840 hydraulic cylinder seal kit is an aftermarket rebuild set supplied by DJF Seals for the bucket cylinders of Kubota mini excavators. The part number RG518-67840 (also written RG51867840) is listed by multiple independent aftermarket suppliers across Europe — Tohren (UK), Techniparts (NL), NetSeals (IT) and MacPeças (PT) — evidence that it is a recognised Kubota-series cylinder seal kit number rather than a proprietary DJF reference. The kit covers the sealing elements of one bucket ram: rod seals, piston seals, wipers, wear guidance components, backup rings and O-rings as applicable to the application. DJF Seals supplies it factory-direct for heavy-equipment parts distributors, repair shops and fleet maintenance teams.

Verified Application

Bucket (bucket ram) cylinder of Kubota mini excavators. Cross-verified sources: eBay (CH) lists the kit as “KX101-3 KX101-3A Bucket Ram Seal Kit ref (RG518-67840)”; Techniparts (NL) lists “Seal Kit Kubota KX101-3 ALPHA — Mini Bagger — Bucket — KUB-RG518-67840”; MacPeças (PT) lists it for the U35-3 bucket (“U35.3 BALDE, REF. 1067/RG518-67840”). No independent source was found assigning this number to any other cylinder position. A dimension cross-check is published by Tohren (UK): 40 mm rod x 65 mm bore — the same values shown on this page; always check them on your cylinder before ordering.

Replacement Scope

One bucket-cylinder seal set per kit. The RG518-67840 kit is a bucket ram repair set — rod and piston sealing elements with wipers and wear guidance components as supplied. Because bucket-cylinder dimensions differ between Kubota model families, check the rod/bore sizes of your cylinder (cross-reference above) and the model of your machine before purchase.

Fitment Verification

Models with independent source support: Kubota KX101-3 (Techniparts, eBay) and KX101-3A (eBay), both for the bucket ram; Kubota U35-3 (MacPeças, bucket). Models appearing only in an aftermarket catalog grouping: KX91-3 and KX121-3 appear in the same NetSeals Kubota seal-kit catalog entry as RG518-67840, but no dealer-level or dimensional verification was found for either model. CONFLICT NOTE: MacPeças maps the KX91-3 bucket kit to a different number — RG518-75130, listed at 45 mm x 90 mm — so KX91-3 fitment for RG518-67840 is not consistent across sources. KX101-2, which appears on this page’s model list, was not found in any independent source and should be treated as unverified. Verify rod/bore sizes and model before ordering.

Factory Inspection & Packing

Every DJF seal kit is checked against its part number and application list before packing: seal elements are inspected for visible defects, counted against the kit list, and packed in sealed PE bags with a parts label. Kits are then packed into export cartons for warehouse or direct shipping. OEM/ODM branding and custom packaging are available on request.

Wholesale Ordering

DJF Seals is the factory, so wholesale buyers deal directly with the manufacturer. We supply the RG518-67840 and other Kubota seal kits at factory-direct pricing, with mixed orders supported. Send your inquiry with quantity to [email protected] or [email protected] — our sales team responds within one business day with a quote, lead time and shipping options.

MOQ

MOQ: 5 kits.

FAQ

Is RG518-67840 a genuine Kubota part number?

It follows Kubota’s RG-series hydraulic part numbering and is listed by several independent European seal-kit suppliers, but DJF sells it as an aftermarket replacement kit. Check fitment against your cylinder and machine before purchase.

Which cylinder does this kit fit?

The bucket (bucket ram) cylinder — cross-verified by eBay, Techniparts and MacPeças listings. The best-documented models are Kubota U35-3, KX101-3 and KX101-3A.

What is the MOQ and how do I order?

MOQ: 5 kits. Email [email protected] or [email protected] with your quantity and shipping address for a factory-direct quote.