Fill out our form - takes 30 seconds - Enjoy Competing Quotes
Komatsu Excavators PC78US-8
PC78US-8 Hydraulic Excavator
Tight tail swing makes the PC78US-8 an excavator from Komatsu with surprising power for a machine its' size into a truly versatile performer. Toss in 15’ 5” dig depth and a backfill blade and you've got an excavator that will do the work you used to bring out a mid-size excavator to do.
Engine
Model
Komatsu SAA4D95LE-5*
Type
Water cooled, 4-cycle, direct injection
Aspiration
Turbocharged, and air-to-air aftercooled
Number of cylinders
4
Piston displacement
199 in³
3.26 ltr
Horsepower - Net (ISO 9249/SAE J1349) @ 1950 rpm
55 HP
41 kW
*EPA Interim Tier 4 and EU Stage 3A certified.
Electric System
Operation voltage
24 V
Battery
55 Ah/2 x 12
Alternator
35 A
Starter
4.5 kW
Hydraulic System
Type: HydrauMind (Hydraulic Mechanical Intelligence New Design) system, Closed-center system with load-sensing valve and pressure-compensated valve
Main pumps:
Type
Variable displacement, axial piston
Maximum flow
42.3 u.s. gal/min
160 ltr/min
Type
Fixed displacement gear
Maximum flow
16.6 u.s. gal/min
63 ltr/min
Hydraulic motors:
Travel
2 x piston motor with parking brake
Swing
1 x piston motor with swing holding brake
Relief valve setting:
Implement, travel circuit
3,840 psi
26.5 MPa / 270 kgf/cm²
Swing circuit
2,990 psi
20.6 MPa / 210 kgf/cm²
Blade circuit (Raise)
1,850 psi
12.7 MPa / 130 kgf/cm²
Blade circuit (Lower)
3,060 psi
21.1 MPa / 215 kgf/cm²
Performance
Travel speed:
High
3.1 mph
5.0 km/hr
Low
1.8 mph
2.9 km/hr
Swing speed
10 rpm
Ground pressure
4.83 psi
0.34 kg/cm²
Max. drawbar pull
15,050 lbf
66.9 kN / 6820 kgf
Gradeability
35°
Bucket digging force (ISO)
13,780 lb
6250 kg
Arm crowd force (ISO)
7,760 lb
3520 kg
Swing System
Driven by
Hydraulic motor
Swing reduction
Planetary gear
Swing circle lubrication
Grease-bathed
Swing lock
Mechanical disc brake
Drives & Brakes
Steering control
Two levers with pedalsr
Drive method
Fully hydrostatic
Service brake
Hydraulic lock
Parking brake
Mechanical disc
Undercarriage
Center frame
X-frame
Track frame
Box-section
Track type
Sealed track
Track adjuster
Hydraulic
Number of carrier rollers (each side)
1
Number of track rollers (each side)
5
Refill Capacities
Fuel tank
33.0 u.s. gal
125 ltr
Radiator
2.6 u.s. gal
10 ltr
Engine
2.9 u.s. gal
11.0 ltr
Final drive, each side
0.3 u.s. gal
1.1 ltr
Swing drive
0.5 u.s. gal
2.0 ltr
Hydraulic tank
14.8 u.s. gal
56 ltr
Operating Weight
Operating weight including 3710 mm / 12'2" one-piece boom, 2250 mm / 7'5" arm, SAE heaped 0.28 m³ / 0.37 yd³ backhoe bucket, cab, rubber shoe, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and other standard equipment.
