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As a well-known Japanese construction machinery manufacturer, Komatsu has a huge influence in the world. Many small brands will learn from Komatsu's product technology accumulation and product design foresight in construction machinery. Many people will find that the small and medium-sized crawler excavators designed and manufactured in Japan are short-tail designs except for the PC120 and PC130. Experienced users will have doubts here. The design of the short-tail excavator has insufficient center of gravity. Even if the excavator engine and hydraulic pump use the same power, there is a certain error with the conventional model of excavator. In fact, the application range of short-tail excavators is now wider. In particular, there are fewer and fewer places in Japan and first-tier cities in developed countries that require large-scale construction machinery. There are still many projects in small areas. There are relatively more restrictions on space and volume. Short-tail excavators have become the mainstream model for promotion. And after multiple upgrades, the actual working efficiency of short-tail excavators is very similar to that of conventional excavators.
The new model -11 in 2024 is except for PC78USI-10. The appearance design is not much different from the previous Komatsu models. Except for stickers and partial upgrades, the Komatsu brand can be recognized at a distance. However, cameras are installed at the tail and left and right sides of the excavator to improve safety, especially in narrow spaces. There are not many changes in the interior of the cab, and the decoration and comfort have been further improved. However, the performance parameters of several excavators in the core power and hydraulic pump are not much different from those of the previous generation of products, but in actual use, it can be clearly felt that the silky and very confident performance output is very strong. In the Tiedou used excavator market, the Komatsu brand has always been loved and sought after by the majority of users. Of course, if the price of Komatsu's original accessories can be more affordable, then there is no reason not to choose Komatsu.
Komatsu PC78US-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-7
Engine power: 55.4 kW (74.3 HP) @ 2000 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 162 L/min
Dimensions:
Length: 6150 mm
Width: 2770 mm
Height: 2730 mm
Working range:
Maximum digging height: 7415 mm
Maximum digging depth: 4630 mm
Komatsu PC78USI-10
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-6
Engine power: 55 kW (73.8 HP) @ 1950 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 160 L/min
Dimensions:
Length: 6080 mm
Width: 2770 mm
Height: 2640 mm
Working range:
Maximum digging height: 7280 mm
Maximum digging depth: 4260 mm
Komatsu PC78UU-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-7
Engine power: 55.4 kW (74.3 HP) @ 2000 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 162 L/min
Dimensions:
Length: 6120 mm
Width: 2320 mm
Height: 2670 mm
Working range:
Maximum digging height: 7440 mm
Maximum digging depth: 4640 mm
Komatsu PC120-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-5
Engine power: 66.2 kW (88.8 HP) @ 2200 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 228 L/min
Dimensions:
Length: 7425 mm
Width: 2590 mm
Height: 2780 mm
Working range:
Maximum digging height: 8670 mm
Maximum digging depth: 5740 mm
Komatsu PC130-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-6
Engine power: 72.6 kW (97.4 HP) @ 2200 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 246 L/min
Dimensions:
Length: 7655 mm
Width: 2590 mm
Height: 2880 mm
Working range:
Maximum digging height: 8930 mm
Maximum digging depth: 6050 mm
Komatsu PC128US-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-7
Engine power: 72.6 kW (97.4 HP) @ 2050 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 246 L/min
Dimensions:
Length: 7755 mm
Width: 2590 mm
Height: 2800 mm
Working range:
Maximum digging height: 8890 mm
Maximum digging depth: 6000 mm
Komatsu PC138US-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-7
Engine power: 72.6 kW (97.4 HP) @ 2050 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 246 L/min
Dimensions:
Length: 7700 mm
Width: 2590 mm
Height: 2890 mm
Working range:
Maximum digging height: 8890 mm
Maximum digging depth: 6000 mm
Komatsu PC138UU-11
Specifications and parameters:
Engine brand/model: Komatsu SAA4D95LE-7
Engine power: 72.6 kW (97.4 HP) @ 2050 rpm
Hydraulic pump model: variable axial piston pump
Hydraulic flow: 246 L/min
Dimensions:
Length: 7740 mm
Width: 2590 mm
Height: 2900 mm
Working range:
Maximum digging height: 8900 mm
Maximum digging depth: 6000 mm
Analysis and comparison
1. Engine power and brand:
The PC78 series (PC78US-11. PC78USI-10. PC78UU-11) uses the lower-power Komatsu SAA4D95LE-6/7 engine, with a power of about 55 kW.
The engine power of PC120-11. PC130-11. PC128US-11. PC138US-11. and PC138UU-11 is relatively high, especially the PC130 series and PC138 series, which reach 72.6 kW, and the PC120-11 is slightly lower, but also has 66.2 kW.
2. Hydraulic system:
The hydraulic flow of the PC78 series is between 160-162 L/min, and the hydraulic system is relatively small.
The hydraulic flow of the PC120-11 to PC138 series is significantly higher, between 228-246 L/min, which means they are capable of more efficient and powerful operations.
3. Size and working range:
The PC78 series is relatively small and is more suitable for construction sites with limited space.
The PC120-11 to PC138 series are larger in size and have a wider working range, especially in terms of digging depth and height.
4. Applicable scenarios:
The PC78 series is suitable for urban construction, small earthworks and narrow construction sites.
The PC120-11 to PC138 series are suitable for medium and large earthworks, road construction and other scenarios that require greater digging depth and height.
If you buy a new Komatsu PC excavator series, the above models have after-sales warranty provided by the manufacturer. With Komatsu's quality assurance, users can buy and use them with complete confidence during the warranty period. If your budget is low, the original used excavators provided by Tiedou Used Excavator Trading Co., Ltd. are also a very good choice. The price is 30%-70% cheaper than the new ones. The performance and working capacity have been strictly tested and manually inspected. Of course, users can come to the site to test the equipment in person, or use one-on-one simulation tests through videos and other methods to meet your needs.
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