Mitsubishi

About Mitsubishi Construction Machinery

Mitsubishi is one of Japan's most iconic and enduring industrial brand names, with a corporate history stretching back to 1870 — making it one of the oldest continuously operating industrial enterprises in Japan. Founded by Yataro Iwasaki in Osaka during the early years of the Meiji era, Mitsubishi began as a small shipping company — the name itself combining the Japanese words for "three" (mi) and "water chestnut" or "diamond" (tsubishi) to create the famous three-diamond symbol that remains one of the most recognised corporate logos in the world today. From those shipping origins, the Mitsubishi zaibatsu — a vast industrial conglomerate — grew over the following century to encompass banking, mining, shipbuilding, steel, glass, chemicals, automotive manufacturing, aerospace, and heavy machinery, making Mitsubishi one of the most diversified and strategically important industrial groups in Japanese and global economic history.

Mitsubishi Heavy Industries — the industrial machinery arm of the Mitsubishi group — has been at the forefront of Japanese heavy engineering for over a century, manufacturing everything from naval vessels and aircraft to power generation equipment, chemical plants, and construction machinery. Mitsubishi's construction equipment division produced hydraulic excavators under the Mitsubishi and later the Mitsubishi-Caterpillar brand identity, reflecting a significant joint venture arrangement between Mitsubishi Heavy Industries and Caterpillar Inc. that shaped Mitsubishi's excavator product development for several decades.

The Mitsubishi-Caterpillar Forklift America joint venture, established in the 1970s, and the broader technology sharing arrangements between Mitsubishi and Caterpillar, gave Mitsubishi excavators access to Caterpillar's advanced hydraulic systems engineering and global product development resources — producing machines that combined Japanese manufacturing precision with Caterpillar hydraulic technology. This engineering heritage is reflected in the quality and capability of Mitsubishi excavators that operated across Australian construction and mining sites during their production years.

Mitsubishi's excavator product line — including the popular MS, MST, and Ninja series — built a strong and loyal following on Australian construction sites for their reliable hydraulic performance, operator comfort, and durability in demanding operating conditions. While Mitsubishi no longer manufactures hydraulic excavators as a current product line — having exited the excavator segment following changes in the Mitsubishi-Caterpillar joint venture arrangements — a significant number of Mitsubishi excavators remain in active and productive service across Australia. Keeping these proven machines operational requires access to a reliable supply of genuine and quality aftermarket Mitsubishi excavator parts from a supplier with the sourcing knowledge and capability to find what is needed. Lucas Parts specialises in supporting legacy excavator brands including Mitsubishi, giving Australian owners a trusted local source for the parts they need.

Mitsubishi Excavator Parts We Supply

At Lucas Parts, we stock and source a comprehensive range of Mitsubishi excavator spare parts to suit the most commonly operated Mitsubishi excavator models in Australia. Our Mitsubishi excavator parts inventory includes:

• Undercarriage parts — track chains, track rollers, carrier rollers, sprockets, idlers, and track shoes for Mitsubishi MS and MST series excavators
• Wear parts — bucket teeth, cutting edges, side cutters, heel shrouds, and bucket pins for Mitsubishi excavator buckets
• Hydraulic components — hydraulic pumps, motors, cylinders, control valves, seals, and hoses for Mitsubishi excavator hydraulic systems
• Engine parts — filters, belts, water pumps, fuel injectors, and gaskets for Mitsubishi excavator engine configurations including S4K, S6K, S6E, S4Q2, and 6D series engines
• Structural components — swing bearings, boom pins, arm pins, bucket link pins, and frame bushings for Mitsubishi excavators
• Hydraulic seal kits — complete seal kits for boom cylinders, arm cylinders, and bucket cylinders on Mitsubishi excavators
• Filters — hydraulic filters, engine oil filters, fuel filters, and air filters for Mitsubishi excavator service requirements
• Turbocharger components — turbocharger assemblies, actuators, and gasket kits for turbocharged Mitsubishi excavator engines
• Electrical parts — sensors, switches, relays, solenoids, and wiring components for Mitsubishi excavator electrical systems
• Cab components — cab glass, door seals, seat assemblies, and operator controls for Mitsubishi excavator cabs
• Travel motor components — travel motor seal kits, brake components, and final drive parts for Mitsubishi excavator undercarriage drive systems

Can't find the Mitsubishi excavator part you need? Call our team on 1300 987 300 and we will source it for you.

Why Choose Lucas Parts for Mitsubishi Excavator Parts?

• Australian stock — faster delivery, no lengthy international lead times
• Competitive pricing — genuine and quality aftermarket Mitsubishi excavator parts at competitive rates
• Expert advice — our team understands Mitsubishi excavator models and can help identify the correct part for your specific machine model and serial number
• Full warranty — all Mitsubishi excavator parts are inspected and covered before dispatch
• Minimise downtime — sourcing parts for legacy Mitsubishi excavators through mainstream dealer networks can be challenging; Lucas Parts has the sourcing capability and procurement relationships to find what you need and get your machine back to work

Finding Parts for Mitsubishi Excavators — Addressing the Supply Challenge

The most significant challenge faced by Mitsubishi excavator owners in Australia today is parts availability. Because Mitsubishi has exited the excavator market, the OEM parts supply chain for Mitsubishi excavators has progressively contracted — dealer network support has diminished, OEM parts inventories have been wound down, and the availability of genuine Mitsubishi excavator parts through traditional channels has become increasingly limited and often prohibitively expensive where parts remain available.

Lucas Parts addresses this challenge through two complementary sourcing strategies. First, we leverage our established procurement relationships with aftermarket parts manufacturers in Japan, South Korea, and China who produce quality replacement parts specifically designed to fit Mitsubishi excavator models — covering undercarriage components, hydraulic seals, wear parts, and engine service items that are no longer readily available through OEM dealer channels. Second, we identify and leverage the cross-compatibility between Mitsubishi excavator components and parts from Caterpillar and other Japanese excavator manufacturers — a particularly valuable cross-reference given the longstanding engineering relationship between Mitsubishi and Caterpillar that resulted in shared component specifications across certain model lines.

If you are struggling to source parts for your Mitsubishi excavator through other channels, contact our team with your machine model and serial number and we will do our best to find what you need — whether through our aftermarket sourcing network or through compatible cross-reference alternatives from related equipment brands.

Mitsubishi Excavator Engine Parts — S4K, S6K, and 6D Series

A significant advantage for Mitsubishi excavator owners from a parts availability perspective is that Mitsubishi excavators were powered by Mitsubishi diesel engines — engine families that remain widely used across forklifts, construction equipment, and industrial machinery in Australia and for which an extensive aftermarket parts supply network exists independently of the Mitsubishi excavator OEM supply chain.

The most commonly fitted Mitsubishi engine series in Australian Mitsubishi excavators include:

• Mitsubishi S4K Series — 3.3L four-cylinder diesel engine widely fitted in smaller Mitsubishi MS series excavators — a compact and reliable engine with strong aftermarket parts support
• Mitsubishi S6K Series — 6.6L six-cylinder turbocharged diesel engine fitted in mid-size and larger Mitsubishi MS and MST series excavators — one of the most widely used Mitsubishi diesel engines in the Australian construction and industrial equipment market
• Mitsubishi S6E Series — six-cylinder diesel engine fitted in certain Mitsubishi excavator models — a durable and well-regarded engine with established aftermarket parts availability
• Mitsubishi S4Q2 Series — compact four-cylinder diesel engine used in smaller Mitsubishi excavator and construction equipment models
• Mitsubishi 6D Series — including the 6D16 and 6D22 large displacement six-cylinder engines fitted in larger Mitsubishi excavator models and heavy construction equipment

Because these Mitsubishi engine families are widely used across forklifts, generating sets, marine vessels, and other industrial equipment — in addition to excavators — the aftermarket parts supply network for Mitsubishi engine service and repair components is considerably more robust than the excavator-specific OEM supply chain. Lucas Parts stocks engine service and repair parts for Mitsubishi S4K, S6K, S6E, S4Q2, and 6D series engines, giving Mitsubishi excavator owners a reliable local source for engine maintenance and overhaul components.

Mitsubishi Excavator Models We Support

We supply and source parts for the following Mitsubishi excavator models that have been widely operated across Australia, including:

• Mitsubishi MS series — MS030, MS050, MS070, MS110, MS140, MS180, MS230, MS240, MS280, MS300, and MS350 hydraulic excavators
• Mitsubishi MST series — MST800, MST1500, MST2000, MST2200, and MST2600 hydraulic excavators widely operated across Australian civil and earthmoving projects
• Mitsubishi Ninja series — compact and mid-size Ninja series excavators used in confined space and urban construction applications across Australia
• Mitsubishi MMS series — mini excavator models used in landscaping, utility, and urban construction applications

Don't see your Mitsubishi excavator model listed? Contact us — we support a broad range of Mitsubishi excavator models and will do our best to source the parts you need regardless of the age or specification of your machine.

Mitsubishi and Caterpillar — Understanding the Parts Cross-Reference Opportunity

Australian Mitsubishi excavator owners should be aware of the longstanding engineering and joint venture relationship between Mitsubishi Heavy Industries and Caterpillar Inc. that significantly shaped Mitsubishi's excavator product development. This relationship resulted in shared or compatible component specifications across certain Mitsubishi and Caterpillar excavator model lines — particularly in hydraulic system components, undercarriage dimensions, and structural specifications — creating a cross-reference opportunity that can significantly expand parts availability options for Australian Mitsubishi excavator owners.

The practical implication of this Mitsubishi-Caterpillar engineering relationship for parts procurement is that for certain Mitsubishi excavator components — particularly undercarriage parts, hydraulic cylinder components, and wear parts — compatible Caterpillar or Caterpillar-compatible aftermarket parts may be available as alternatives when specific Mitsubishi OEM parts are difficult or expensive to source. Our team has knowledge of the key cross-reference points between Mitsubishi and Caterpillar excavator component specifications and can advise on compatible alternatives for your specific machine model and component requirement.

Mitsubishi Excavator Undercarriage — Maintenance and Replacement

Undercarriage components are the highest-wear and most frequently replaced parts on any tracked excavator and Mitsubishi MS and MST series excavators are no exception. The undercarriage system — comprising track chains, track rollers, carrier rollers, idlers, sprockets, and track shoes — operates under continuous load and abrasion during machine travel and working cycles, and correct undercarriage maintenance is the most important factor in controlling total machine operating costs over the excavator's working life.

For Mitsubishi MS and MST series excavators, quality aftermarket undercarriage components manufactured to OEM dimensional specifications are available through Lucas Parts for the most commonly operated models. These aftermarket undercarriage components offer a cost-effective and practically available alternative to OEM parts — which have become increasingly difficult and expensive to source as Mitsubishi's excavator OEM supply chain has contracted — without compromising on the wear life and performance that Mitsubishi excavator owners expect from their machines.

Key undercarriage maintenance practices for Mitsubishi excavator owners include regular track tension inspection and adjustment to manufacturer specification, periodic track roller and carrier roller oil level checks, and systematic wear monitoring of rollers, idlers, and sprockets to identify components approaching end of service life before failure causes collateral damage to adjacent undercarriage components.

Serving Construction Businesses Across Australia

Lucas Parts supplies Mitsubishi excavator parts to customers in Melbourne, Sydney, Brisbane, Perth, Adelaide, Darwin, and regional Australia. We work with civil contractors, earthmoving companies, plant hire businesses, equipment dealers, and independent Mitsubishi excavator owners who need reliable parts supply — including hard-to-find components for legacy Mitsubishi models that are no longer supported through mainstream dealer networks.

Browse our full Mitsubishi excavator parts catalogue or contact our team today to discuss your requirements.

Frequently Asked Questions — Mitsubishi Excavator Parts

Does Mitsubishi still manufacture excavators?

No. Mitsubishi Heavy Industries has exited the hydraulic excavator market and no longer manufactures excavators as a current product line. However, a significant number of Mitsubishi MS, MST, and Ninja series excavators remain in active service across Australia, and Lucas Parts supports the owners of these machines with aftermarket and sourced replacement parts to keep them operational.

How do I find the correct Mitsubishi excavator part for my machine?

The most reliable method is to locate your machine's model designation and serial number from the machine identification plate — typically found on the cab door frame or main frame — and have these details ready when you contact us. For older Mitsubishi MS and MST series models, the serial number is particularly important as parts specifications can vary between early and late production machines of the same model designation. Our team can cross-reference your serial number against Mitsubishi's parts catalogue and our aftermarket sourcing network to identify the correct part before you order.

Are Mitsubishi excavator parts compatible with Caterpillar parts?

For certain Mitsubishi excavator models produced during the period of the Mitsubishi-Caterpillar joint venture and technology sharing arrangement, there is parts compatibility between specific Mitsubishi and Caterpillar component specifications — particularly for undercarriage components, hydraulic cylinder dimensions, and certain wear parts. This compatibility varies by specific model and component and should always be confirmed before substituting Caterpillar parts on a Mitsubishi machine. Our team has knowledge of the key cross-reference points and can advise on compatibility for your specific Mitsubishi model and component requirement.

What engines are fitted in Mitsubishi excavators?

Mitsubishi excavators were powered by Mitsubishi diesel engines — the same engine families widely used in Mitsubishi forklifts, generating sets, and industrial equipment across Australia. Common engine fitments include the S4K four-cylinder engine in smaller models, the S6K six-cylinder turbocharged engine in mid-size and larger models, the S6E six-cylinder engine in certain models, and the 6D16 and 6D22 large displacement engines in the largest Mitsubishi excavator models. The widespread use of these engine families across other Mitsubishi equipment types means that engine service and repair parts are available through established aftermarket supply channels — including Lucas Parts — independently of the Mitsubishi excavator OEM supply chain.

Can you source hydraulic pump replacements for Mitsubishi excavators?

Yes. Hydraulic pumps are among the most significant repair items on any excavator and we have sourcing capability for hydraulic pump replacements for Mitsubishi MS and MST series models through our aftermarket and remanufactured component supply network. Mitsubishi excavators used hydraulic pump assemblies from leading Japanese hydraulic component manufacturers — many of which have well-established aftermarket and remanufacturing supply chains. Contact our team with your Mitsubishi model, serial number, and the specific hydraulic component you require and we will advise on availability and pricing.

How often should Mitsubishi excavator undercarriage be inspected?

We recommend undercarriage inspection every 250 operating hours as a minimum, with a comprehensive wear measurement assessment every 500 hours. In abrasive or rocky operating conditions — common across many Australian construction and quarrying sites — more frequent inspection is advisable. Early identification of worn components allows targeted replacement before wear propagates to adjacent undercarriage parts, significantly reducing total undercarriage replacement costs over the machine's working life.

How long does delivery take?

Delivery timeframes depend on your location and whether the part is in local stock or needs to be sourced. For Mitsubishi-specific parts requiring international sourcing, we will provide you with a realistic lead time estimate upfront so you can plan your machine's repair schedule accordingly. We maintain stock of the most commonly required Mitsubishi undercarriage and wear parts to minimise lead times for routine replacement items.

Are your Mitsubishi excavator parts covered by a warranty?

Yes. All Mitsubishi excavator parts supplied by Lucas Parts carry a warranty. Speak to our team for specific warranty terms applicable to the part you are purchasing.

Can I order Mitsubishi excavator parts online?

Yes. You can browse and order through our website at lucasparts.com.au, or call us on 1300 987 300 for personalised assistance.