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Mini Excavator Parts Sourcing: What Must Be Genuine, What Aftermarket Covers, and What to Send for a Quote

Compact machines from 1 to 8 tonnes run more different engines than any other excavator class. Here is how to split the parts list between genuine, OEM-quality and aftermarket supply - and how to buy the whole list from one warehouse.

Sourcing Guide  ยท  October 1, 2026  ยท  Guangzhou, China

Mini Excavator Parts Sourcing: What Must Be Genuine, What Aftermarket Covers, and What to Send for a Quote

Engine parts for the compact excavator class, Shenyue warehouse

Engine parts for the compact excavator class, Shenyue warehouse

Compact-class hydraulic pump and control components

Compact-class hydraulic pump and control components

Compact excavator undercarriage and rubber track components

Compact excavator undercarriage and rubber track components

Mini excavators between one and eight tonnes are the hardest class in the industry to keep in parts, because the same size of machine may run a Yanmar, a Kubota, a Caterpillar or a Perkins engine, and each of those engines has its own filter set, its own injectors and its own gasket kit. Add rubber tracks, a three-cylinder hydraulic philosophy and a dozen attachment interfaces, and the parts list for a compact fleet becomes longer than the list for a 20-tonne machine. This guide splits that list into the three groups buyers actually need - genuine only, OEM-quality, and aftermarket - and explains what to send to get a usable quotation. Guangzhou Shenyue Machinery Technology Co., Ltd. quotes these lists daily from its Guangzhou warehouse.

Corbay is the international export brand of Guangzhou Shenyue Machinery Technology Co., Ltd., Guangzhou, China. The company has supplied excavator parts since 2007, holds 3,000+ part types on the shelf and 100,000+ part numbers available to order through original supply channels, and works with more than 100 machine brands.

Why the Compact Class Is Harder to Source Than a 20-Tonne Machine

On a full-size excavator the engine and hydraulic brands are predictable: a Kobelco SK200-8 runs a Hino J05E, a Komatsu PC200 runs a Komatsu engine. In the compact class that certainty disappears. Yanmar 3TNV and 4TNV, Kubota D and V series, Caterpillar C1.1 to C2.2, Perkins 400 series and Mitsubishi units all appear in machines of the same weight, and OEMs switch suppliers between production runs. The practical consequence is that compact buyers must order by part number or by photograph, not by machine description alone - a filter listed as "fits 3-tonne excavator" fits nothing in particular.

Group One: Buy Genuine or Original-Channel, Do Not Compromise

Common-rail injectors and high-pressure fuel pumps.Calibration codes are matched to the engine control map; a copy with the wrong code runs, smokes and eventually damages the engine.
ECU, monitor and controller units.Software, immobiliser and language settings are model-specific. Used units from a breaker are frequently locked.
Electronically controlled hydraulic pumps.Compact machines use small pumps with integrated regulators, and the regulator curve has to match the machine, not just the displacement.
Anything safety-related.Boom-lock valves, hose burst protection and load-holding valves should come from the original channel and be documented.

Group Two: OEM-Quality Is the Sensible Default

OEM-quality covers parts made to the original drawing by an independent manufacturer - hydraulic cylinders built to the same bore and stroke, travel motors with the same mounting and relief settings, starter motors and alternators with the same output. For a working machine that is not under a dealer warranty, this is where most fleets spend their money, because the difference in service life is small and the difference in price is not. Every line quoted by Shenyue Machinery states whether it is genuine, OEM-quality or aftermarket, so the choice stays with the buyer.

Group Three: Aftermarket Is Fine, and Usually Better Value

Filters, seals and O-rings.The classic aftermarket category - brand-name filter media at a fraction of the price.
Rubber tracks and steel track groups.Compact undercarriage is a consumable; grade selection matters more than badge.
Pins, bushings, bucket teeth and cutting edges.Wear parts by definition.
Hoses, fittings, belts and engine mounts.Standard industrial items with published specifications.

Reference Numbers We Quote in This Class

To make the ordering concrete, our catalogue carries compact-class references such as the engine overhaul gasket kit commonly quoted as VI5878151960 / 5-87818222-0 for the SK75-8 class, the pilot valve YT22V00021F1C for the same machine family, and the hand pilot valve PX30V00043F4 used across the SK30, SK50, SK60 and SK75-8 classes. Where a reference is only commonly quoted rather than fully confirmed against the machine, the quotation says so - the machine and component nameplate is the authority, not a catalogue line. Kawasaki Heavy Industries publishes the service documentation behind the hydraulic components used in many compact machines, and its khi.co.jp site is the reference we point fitters to for pump fundamentals.

Freight Is Half of a Compact Parts Order

Compact parts are small and light, so freight changes the landed cost more than the price of the parts. Filters, seals and injectors travel economically by air express. Rubber tracks, buckets and undercarriage groups are volumetric and belong in a sea container, and one consolidated mixed-brand shipment is almost always cheaper than two or three small ones. Buyers who want the numbers before they commit can send a list with quantities and the destination port and ask for both an air and a sea option.

What to Send for a Mini Excavator Quotation

Six things produce a usable quotation: the machine brand and model; the serial number; a photograph of the data plate; the part number if it is readable; a photograph of the failed component from two or three angles; the quantity; and the destination port. Fitters who cannot read a number can send the plate photograph alone - identification from a plate and a photograph is routine, and it is faster than a wrong order. Kobelco-focused detail on compact SK machines sits on the Shenyue Kobelco site, shenyuekobelco.com, while multi-brand lists are quoted here.

Compact Class Parts - FAQ

Will a filter for one 3-tonne machine fit another?Only if the thread, the seal diameter and the bypass rating match. Cross-references exist, but they must be checked against the number on the old filter, not the machine size.
Can I mix genuine and aftermarket in one shipment?Yes, and most fleets do. The quotation groups the lines by grade so the customs description and the packing list stay clear.
How do I request a quotation and how quickly will I hear back?Send the machine details, part numbers or photographs, quantities and destination port through the contact page - Guangzhou Shenyue Machinery Technology Co., Ltd. normally replies within 24 hours with every grade priced on its own line.

Buy the Whole List Once

The cost of a compact fleet is not the price of a filter; it is the number of times a machine stands still while one is found. Build the list by group, consolidate the brands into one shipment, and send the machine details and photographs to the team at Guangzhou Shenyue Machinery Technology Co., Ltd. The list will be identified, quoted in every grade, and photographed before it leaves Guangzhou.

Corbay Excavator Parts is the international export brand of Shenyue Machinery (Guangzhou Shenyue Machinery Technology Co., Ltd.), Guangzhou, China. Shenyue is an independent parts specialist and is not affiliated with, or an authorized dealer of, Kobelco Limited. Parts are supplied as genuine, OEM or clearly identified aftermarket items, and the grade is stated on every quotation.