Demo Video
Description
We are excited to offer this professionally reconditioned 1990 Komatsu PC28UU mini excavator, which has an operating weight of 2,980 Kg (6,571 pounds) and only 2,775 hours of usage. The machine is in excellent running condition, as demonstrated by our transparent photos and video. The machine is powered by a Yanmar diesel engine (3D78-1F) with a capacity of 23.3 HP. Additionally, this unit has been modified to operate with Caterpillar (S.A.E) control pattern by default.
The mini excavator has undergone thorough servicing, including a replacement of hydraulic fluids, engine oils, coolant with antifreeze, and air, fuel, and oil filters. We have also made several upgrades, including a new hydraulic thumb controlled by a foot pedal, a new water-resistant seat and seat belt, a new starting battery, a new LED headlight, new bucket teeth, new decals, and a bright Caterpillar-yellow paint job. The unit has been fumigated and steam cleaned in accordance with U.S. CBP import requirements. This machine also comes with a spare ignition key, spare bucket teeth, spare filters, and a full set of operations & part manuals.
Product Features
This model is highly sought-after for its two-piece offset boom, which is ideal for working in tight spaces with limited swing. When working in a narrow alley, the boom can be knuckled off to the right or left, allowing the machine to dig in line with one of the tracks next to a structure. With its 1495-mm (4' 11") upper body, 1450-mm (4' 9") overall width, and a tail swing radius of 790 mm (2' 7"), this unit is qualified as a zero-tail swing machine.
Japanese ingenuity has been applied to this model by using sound-absorbing material in various parts of the machine to achieve low noise performance comparable to that of a passenger car. This makes it well-suited for night work and urban areas, such as schools and hospitals, with a noise level rated at 55 dBA @ 30 meters (98'5") and 66 dBA @ 7 meters (23'0"). To the operator's ears, noise exposure is rated at only 77 dBA.
Product Manuals
General
- Make: Komatsu
- Model: PC28UU
- Serial #: 6363
- Track: Rubber (BRAND NEW)
- Year built: 1991
- Hour meter: 2,872
- Origin: Japan
- Operating weight: 2,980 Kg (6,571 lbs)
- Bucket digging force: 2,140 Kg (4,718 lbs)
- Max ground pressure: 0.30 Kg/cm2 (4.3 psi)
- Swing speed: 9.5 rpm
- Swing max slope angle: ? deg.
- Travel speed: 2.0 kmh (1.2 mph)
- Gradeability: 30 deg.
Engine
- Make: Komatsu
- Serial #: 10726
- Fuel: Diesel
- Model: 3D78-1F (4-cycle, water-cooled, direct injection)
- No. of cylinders - bore x stroke: ?
- Piston displacement: 1.232 L (75.2 cu.in.)
- Firing order: ?
- Flywheel horsepower: 23.3 HP @ 2,500 RPM
- Max torque: ? Kgm @ ? rpm
- Max speed at no load (high idling) : ? rpm
- Min speed at no load (low idling): ? rpm
- Min fuel consumption: ? g/HP.h
- Alternator: ?
- Starting Motor: ?
- Battery: ?
OEM Working Range

Recorded Dimensions
- Overall Length: 3,790 mm (12'5")
- Overall Width: 1,495 mm (4'11")
- Overall Height: 2,380 mm (7'10")
- Backfill Blade Width: 1,495 mm (4'11")
- Backfill Blade Height: 325 mm (1'1")
- Bucket Width: 430 mm (1'5")
- Thumb Width: 275 mm (0'11")
- Track Width: 300 mm (1'0")
- Track Length: 1,950 mm (6'5")
- Track Standard: 300mm (W) x 52.5mm (P) x 80 (L)
- Boom Cylinder: 702 mm (2'4")
- Arm Cylinder: 444 mm (1'5")
- Bucket Cylinder: 424 mm (1'5")
- Thumb Cylinder: 300 mm (1'0")
OEM Dimensions
