Komatsu PC78 Mini excavators tech specs
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The Komatsu PC78 is a 7.7-ton mini excavator that bridges the gap between compact and mid-size classes, offering strong hydraulics, deep reach, and excellent stability. It’s well suited for utilities, roadwork, and confined urban sites where power still matters.
Komatsu engine 40.2 kW
bucket capacity 0.28 cu m
digging depth 4,230 mm
hydraulic flow 160 lpm
drawbar pull 65.1 kN
operating weight 7,700 kg
Komatsu PC78 Technical specifications
General
Boom length
3.27 m
Bucket width
630 mm
Gradeability
35 º
Engine model
S4D95LE-3
Bucket capacity
0.28 cu m
Max digging depth
4230 mm
Max digging reach
6,400 mm
Max dump height
5290 mm
Operating weight
7,700 kg
Max speed forward
4.5 kph
Undercarriage
Track length
2.9 m
Drawbar Pull
65.1 kN
Track width
45 cm
Engine
Displacement
3261 cu cm
Net power
40.2 kw
Hydraulic system
Pump flow cap
160 lpm
Relief valve pressure
270 bar
Operational specifications
Arm crowding force
40.4 kN
Swing speed
10 rpm
Attachments
Bucket digging force
61.3 kN
Service refill capacities
Fuel cap
125 liter
Hydraulic fluid cap
120 liter
Komatsu PC78 expert review
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Overview
The Komatsu PC78UU-6 sits at the top end of the mini excavator segment, delivering 40.2 kW of power, high hydraulic output, and a working range that rivals smaller mid-size excavators. Its zero-tail design allows confident operation in confined environments without sacrificing stability.
Efficiency
With 160 lpm hydraulic flow and a proven Komatsu engine, the PC78UU-6 maintains fast, smooth cycles in trenching, loading, and utility work.
In Cabin
The cab prioritizes visibility, simple control layout, and operator comfort, supporting long shifts and precision operation.
In Comparison
Compared to the Cat 307, the PC78UU-6 offers more hydraulic power and digging force. Against the Cat 308, it delivers similar performance with a more compact operating feel.
Verdict
Rated 5 stars, the Komatsu PC78UU-6 is a dependable, high-performance mini excavator that balances compact size with serious capability.
Komatsu PC78 owner rating
2000-2014
Overall rating
Based on 3 ratings
4.3
4.3
4.7
5.0
4.3
33 %
67 %
0 %
0 %
0 %
4.0
4.0
5.0
5.0
4.0
4.0
4.0
4.0
5.0
4.0
Komatsu PC78 similar models
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Komatsu PC78 gallery
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