Demo Video
Description
This 1991-built Komatsu PC50UU is a professionally reconditioned mini excavator with its 5,185 Kg (11,433 pounds) operating weight. It only has 2,566 hours, and in great running condition with normal wear and tear as shown on our transparent photos and demonstration video. The machine is powered by a Yanmar-manufactured diesel engine (3D95S-W-1) which is capable of delivering 38.5 HP. This unit has been modified to adopt Caterpillar (S.A.E) control pattern by default. Reverting to original Komatsu (Japanese) control pattern is also possible via a built-in quick shifter.
This unit has been thoroughly serviced with new hydraulic fluids, new engine oils, new coolant with antifreeze, and new filters (air, fuel, and oil). We have upgraded the excavator with new foot-pedal-controlled hydraulic thumb, new seat & seat belt, new starting battery, new LED headlight, new decals, and vivid Caterpillar-yellow paint. As required by U.S. CBP importing requirements, this unit has undergone strict fumigation and steam cleaning.
Product Features
This model has a highly-sought-after two-piece offset boom which is particularly useful for tight workspace applications with limited swing. If you are working in a tight alley, the boom can knuckle off to the right or left so that the machine can dig in line with one of the tracks up next to a structure. This model is qualified as a zero-tail swing machine with its 1750-mm upper body, 2000-mm overall width, and a tail swing radius of 990 mm (3'3"). This unit also comes with dual speed travel with high speed of 2.0 mph and low speed of 1.1 mph.
With Japanese ingenuity of applying sound-absorbing material to various parts of the machine, low noise performance comparable to that of a passenger car has been achieved. This model is designed for night work and urban areas such as schools and hospitals with noise level rated at 58 dBA @ 30 meter (98'5") and 70 dBA @ 7 meter (23'0"). To operator's ears, noise exposure is rated at only 83 dBA.
Product Manuals
General
- Make: Komatsu
- Model: PC50UU
- Serial #: 6552
- Track: Rubber (used)
- Year built: 1991
- Hour meter: 2,566
- Origin: Japan
- Operating weight: 5,185 Kg (11,433 lbs)
- Bucket digging force: 3,500 Kg (7,716 lbs)
- Max ground pressure: 0.32 Kg/cm2 (4.6 psi)
- Swing speed: 9.0 rpm
- Swing max slope angle: ? deg.
- Travel speed: 1.7 kmh (1.1 mph) & 3.2 kmh (2.0 mph)
- Gradeability: 30 deg.
Engine
- Make: Komatsu
- Serial #: 24996
- Fuel: Diesel
- Model: 3D95S-W-1
- No. of cylinders - bore x stroke: ?
- Piston displacement: 2.020 L (123.3 cu.in.)
- Firing order: ?
- Flywheel horsepower: 38.5 HP @ 2,500 RPM
- Max torque: ? Kgm @ ? rpm
- Max speed at no load (high idling) : 2,700 rpm
- Min speed at no load (low idling): 950 rpm
- Min fuel consumption: ? g/HP.h
- Alternator: ?
- Starting Motor: ?
- Battery: ?
Fuel, Lubricating Oil, and Coolant
- Fuel: 56 Liter (14.8 US gallon)
- Hydraulic Oil (tank oil level): ?
- Hydraulic Oil (total system): 70 Liter (18.5 US gallon)
- Engine Oil (minimum): ?
- Engine Oil (maximum): ?
- Coolant: ?
OEM Working Range
Arm length | ||
a | Maximum digging height | 6180 mm (20'3") |
b | Maximum dumping height | 4440 mm (14'7") |
c | Maximum digging depth | 3800 mm (12'6") |
d | Maximum vertical digging depth | 2500 mm (8'2") |
e | Maximum digging reach | 5580 mm (18'4") |
f | Maximum reach–ground level | 5470 mm (17'11") |
g | Minimum swing radius | 990 mm (3'3") |
h | Maximum blade lift | 320 mm (1"0") |
i | Maximum blade depth | 380 mm (1'3") |

Recorded Dimensions
- Transport Length: 5,950 mm (19'6")
- Transport Width: 2,000 mm (6'7")
- Transport Height: 2,420 mm (7'11")
- Backfill Blade Width: 2,000 mm (6'7")
- Backfill Blade Height: 360 mm (1'2")
- Bucket Width: 610 mm (2'0")
- Thumb Width: 310 mm (1'0")
- Track Width: 400 mm (1'4")
- Track Length: 2,390 (7'9")
- Track Standard: 400mm (width) x 72.5mm (pitch) x 70 (link)
- Boom Cylinder: 930 mm (3'1")
- Arm Cylinder: 750 mm (2'6")
- Bucket Cylinder: 585 mm (1'11")
- Thumb Cylinder: 290 mm (0'11")
OEM Dimensions
A | 5950 mm (19'6") | Overall length |
B | 2420 mm (7'11") | Overall height |
C | 2000 mm (6'7") | Overall width |
D | 590 mm (1'11") | Ground clearance, counterweight |
E | 305 mm (1'0") | Ground clearance, min. |
E2 | 400 mm (1'4") | Backfill blade height |
F | 990 mm (3'3") | Tail swing radius |
G | 1875 mm (6'2") | Track length on ground |
H | 2380 mm (7'10") | Track length |
I | 1600 mm (5'3") | Track gauge |
J | 400 mm (1'4") | Shoe width |
K | 1750 mm (5'9") | Machine upper width |
L | No Data | Rear End Radius |
M/N | No Data | Boom swing angle |
O | 740 mm (2'5") | Bucket offset LH |
P | 810 mm (2'8") | Bucket offset RH |
