2024 Komatsu Excavators PC78US-11
- Year 2024
- Make Komatsu
- Model Excavators
- Engine Model: SAA3D95E-1
2024 Komatsu Excavators PC78US-11
Designed to excel in underground utility and general construction in urban environments, this new Komatsu short tail swing excavator is at home in confined spaces. Extremely transportable, it delivers high attachment flow with in-cab programmable flow rates for a wide range of attachments.
Features may include:
Compact design- For working in tight areas, a compact short tail swing offers maneuverability in more confined areas than a conventional excavator, such as in a single lane of traffic. The conventional boom design has a greater raising angle to reduce the front bucket swing radius.
- Faster boom up/swing speed, combined with responsive quick arm speed, makes excavating and leveling work easier and more efficient over previous models. Six working modes let you tailor the machine to the tasks required, whether it be for performance or fuel savings.
- Standard high flow auxiliary hydraulics with proportional joysticks allows you incredible job versatility while providing precise attachment control. Standard grading blade with new moldboard profile improves backfilling and light grading efficiency over previous models.
- Operators work comfortably in a quiet, climate-controlled cab featuring air suspension seat, Bluetooth radio, and high-resolution monitor with rearview camera. LED lights provide excellent vision at night. Sliding cab door makes entry and exit easier in confined spaces.
- The new high-efficiency power package and viscous fan clutch work together to lower overall fuel consumption up to 13%*. A smart, simplified catalytic system removes soot?without a diesel particulate filter, meaning lower cost of ownership and less maintenance.
- Periodic maintenance is more accessible and efficient with large service access doors and grouped service points with ground-level access.
Engine
Engine Manufacturer
Komatsu
Engine
Model: SAA3D95E-1
Cooling
Water-cooled | Fan drive method for radiator cooling: Mechanical with viscous fan clutch
Cylinder Liners
3
Bore
3.74 in | Hydraulic cylinders Boom: 4.33 in | Hydraulic cylinders Arm: 3.74 in | Hydraulic cylinders Bucket: 3.35 in | Hydraulic cylinders Blade: 5.12 in
Stroke
4.52 in | Hydraulic cylinders Boom: 33.8 in | Hydraulic cylinders Arm: 33.9 in | Hydraulic cylinders Bucket: 27.95 in | Hydraulic cylinders Blade: 5.12 in
Displacement
Piston: 149.5 in³
Engine Power
SAE J1995 / Gross: 68.0 HP | ISO 9249 / SAE J1349 / Net: 67.9 HP
Rated Engine Speed
1,850 rpm
Engine Type
4-cycle,
Aspiration
Turbocharged, aftercooled, cooled EGR
Lubrication
Swing circle lubrication: Grease-bathed
Motor
Motor Type
Travel: 2 x piston motor with parking brake | Swing: 1 x axial piston motor with swing holding brake
Fuel System
Fuel Injection
direct
Drivetrain
Governor
All-speed control, electronic
Steering
control: Two levers with pedals
Drive System
method: Hydrostatic | Swing System method: Hydrostatic
Brakes
Brake System Type
Hydraulic lock | Swing brake: Hydraulic motor | Swing lock: Mechanical disc brake
Parking Brake
Mechanical discs
Operational
Operating Conditions
Gradeability: 30° | Maximum drawbar pull: 15,309 lbf. |
Operating Speed
High: 3.1 mph | Low: 1.9 mph | Swing: 10 rpm
Ground Pressure
Road liner 18": 5.20 psi. | Triple grouser 18": 5.20 psi | Triple grouser 24": 3.90 psi | Rubber shoe 18": 5.10 psi
Hydraulics
Pump Type
Pumps for: Boom, arm, bucket, swing, and travel circuits | Type: Variable displacement, axial piston | Pumps for: Blade | Type: Fixed displacement gear
Hydraulic Flow
Maximum flow: 44.4 gpm | Maximum flow: 17.0 gpm | Auxiliary hydraulics (two-stage relief): Two-way 36.5 gpm / One-way 21.1 gpm
Relief Valve Setting
Implement circuits: 4,264 psi | Travel circuit: 4,337 psi | Swing circuit: 3,176 psi | Pilot circuit: 464 psi | Blade circuit (Raise, Lower): 1,784 psi | Blade circuit (Lower): 3,060 psi
Maximum Pressure
Auxiliary hydraulics (two-stage relief): Relief 3,830 psi / Relief in breaker mode 2,490 psi
Chassis
Frame Type
Center frame: X-frame leg | Track frame: Box-section
Dimensions
Dimensions
Shoes: 16 in | Hydraulic cylinders Boom (rod diameter): 2.56 in | Hydraulic cylinders Arm (rod diameter): 2.36 in | Hydraulic cylinders Bucket (rod diameter): 2.17 in | Hydraulic cylinders Blade (rod diameter): 2.56 in
Capacities
Fuel Capacity
Engine: 2.7 US gal | tank: 33.0 US gal | Final drive (each side): 0.29 US gal | Swing drive: 0.52 US gal
Hydraulic Capacity
14.8 US gal
Cooling System
Radiator: 4.8 US gal
Weights
Weight, In Running Order
Road liner 18": 17,791 lbs. | Triple grouser 18": 17,483 lbs. | Triple grouser 24": 18,188 lbs. | Rubber shoe 18": 17,438 lbs.
Features
Track Type
Sealed | adjuster: Hydraulic
Features
Swing reduction: Planetary gear | Number of shoes (each side): 39 | Number of carrier rollers (each side): 1 | Number of track rollers (each side): 5