English
Lietuvių
Latviešu
Eesti
Polski
Русский
Українська
Deutsch
Nederlands
Čeština
Slovenčina
Svenska
Norsk
Dansk
Suomi
Komatsu PC55: 5.5 t mini excavator and review
Komatsu PC55 — a compact mini excavator with an operating weight of around 5.5 t. We take a look at the PC55MR series, key features, and what to check when buying a used PC55.
PC55 in brief
PC55MR — a popular compact excavator suitable for urban construction, trench digging, road maintenance, and garden work. The letters MR indicate a reduced tail swing — the rear doesn't stick out much during turns.
These machines are widely available in the used market, with a good supply of parts and services. They are often sold with several buckets and quick couplings.
Series — what's the difference
Older series are simpler, with less electronics. Newer versions have a more modern engine, a more comfortable cabin, and advanced hydraulics. Some machines come with additional hydraulics for a hammer or other attachments.
Before purchasing, it's essential to determine the exact series and year of manufacture, as engine standards and cabin comfort vary.
Engine and key components
The PC55 is powered by a four-cylinder Komatsu diesel engine. Engines in newer versions comply with stricter Stage standards, so they may have additional exhaust gas treatment systems.
Key components: hydraulic pump and valves, rubber or steel tracks, rollers, swing mechanism, boom with arm, buckets and teeth, and a blade.
What to check when buying a used PC55
Check the engine hours, start-up, smoke, and leaks. Test all hydraulic functions — movements should be smooth and powerful.
Check the tyres, wheels, and suspension, the play in the steering and suspension joints, and the condition of the steering rack. See if the car has been worked on with a hammer, and check the condition of the quick-release couplings.
Versions and trims
Names and equipment vary by market and year of production; we list the versions most commonly found in Europe.
PC55MR-2
Older seriesSimpler technology, lower price.
- Often — simpler electronics
- Often — high mileage
- Must be inspected
PC55MR-3
Mid-ageImproved generation.
- More comfortable cabin
- Often — additional hydraulics
- More economical engine
PC55MR-5
Newer generationNewer version with a modern engine.
- Often — SCR or particle filter
- More advanced electronics
- More efficient hydraulics
PC55 su tiltrotatoriumi
depending on the trimWith a swivel seat for versatile tasks.
- Additional hydraulic lines
- Often — quick coupling
- Check the condition of the rotary
Comparison of PC55MR versions
| PC55MR-2 | PC55MR-3 | PC55MR-5 | |
|---|---|---|---|
| Who it's for | For budget work | For everyday work | For intensive and modern work regimes |
| Engine technology | Older | Mid-range | Modern |
| Cab | Base | Comfort | Top-spec |
| Price in the used market (relatively) | Budget | Mid-range | High-end |
For budget work, an older PC55MR with a good history often fits the bill. For more intensive work, it's worth seeking out newer versions.
Pros
- Compact size and decent power
- Minimal overhang at the rear
- Wide range of parts available
- Suitable for urban tasks
Cons
- Less power than larger vehicles
- Rubber tracks wear quickly on rough surfaces
- Electronics are more complex in newer versions
Frequently asked questions
What is the weight of the Komatsu PC55MR?
Operating weight around 5.5 t, depending on the version. Check the exact weight in the documents.
What does MR mean in PC55?
MR denotes a reduced tail swing: the rear of the machine protrudes less during turning, making it easier to work in confined spaces.
Is the PC55 suitable for urban jobs?
Yes, especially due to its small tail swing. However, due to its weight, it's essential to check if there's enough space for maneuvers and if transportation is allowed.
Updated 2026-10-21 · Trim levels and equipment vary by market and model year — check the equipment of the specific car. · Translated automatically
