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Small excavator PC78US-11
Horsepower 68 HP @ 1,850 rpm
Operating weight 17,438 - 18,188 lbs.
Bucket capacity 0.12 - 0.26 yd3
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.

Compact design works in confined areas Accepts a wide range of attachments Easy to transport Uses up to 13% less fuel than prior model

Features and benefits
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.

Fast cycles and custom modes
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.

Fuel efficient, low-cost power
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. * over previous model

Maximum operator comfort
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.

Quick and easy maintenance
Periodic maintenance is more accessible and efficient with large service access doors and grouped service points with ground-level access.

Versatility and efficiency come standard
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.

Specifications for PC78US-11
Engine
Model Komatsu SAA3D95E-1* Type Water-cooled, 4-cycle, direct injection Aspiration Turbocharged, aftercooled, cooled EGR Number of Cylinders 3 Bore 3.74 in Stroke 4.52 in Piston displacement 149.5 in3 Horsepower @ 1,900 rpm: SAE J1995 / Gross 68.0 HP ISO 9249 / SAE J1349 / Net 67.9 HP Rated rpm 1,850 Fan drive method for radiator cooling Mechanical with viscous fan clutch Governor All-speed control, electronic *EPA Tier 4 Final emissions certified

Hydraulics
HydrauMind (Hydraulic Mechanical Intelligence New Design) system, closed-center system with load-sensing valves and pressure-compensated valves

Number of selectable working modes 6
Main pumps: Pumps for Boom, arm, bucket, swing, and travel circuits Type Variable displacement, axial piston Maximum flow 44.4 gpm Pumps for Blade Type Fixed displacement gear Maximum flow 17.0 gpm Hydraulic motors: Travel 2 x piston motor with parking brake Swing 1 x axial piston motor with swing holding brake Relief valve setting: Implement circuits 4,264 psi Travel circuits 4,337 psi Swing circuit 3,176 psi Pilot circuit 464 psi Blade circuit (Raise) 1,784 psi Blade circuit (Lower) 3,060 psi Hydraulic cylinders (Number of cylinders): bore x stroke x rod Boom (1) 4.33 x 33.8 x 2.56 in Arm (1) 3.74 x 33.9 x 2.36 in Bucket (1) 3.35 x 27.95 x 2.17 in Blade (1) 5.12 x 5.12 x 2.56 in Auxiliary hydraulics (two-stage relief): Two-way 36.5 gpm Relief 3,830 psi One-way 21.1 gpm Relief in breaker mode 2,490 psi Drives and brakes Steering control Two levers with pedals Drive method Hydrostatic Maximum drawbar pull 15,309 lbf. Maximum travel speed: High 3.1 mph Low 1.9 mph Service brake Hydraulic lock Parking brake Mechanical discs Swing system Driven by Hydraulic motor Swing reduction Planetary gear Swing circle lubrication Grease-bathed Swing lock Mechanical disc brake Swing speed 10 rpm Undercarriage Center frame X-frame leg Track frame Box-section Track type Sealed Track adjuster Hydraulic Number of shoes 39 each side Number of carrier rollers 1 each side Number of track rollers 5 each side Coolant and lubricant capacity (refilling) Fuel tank 33.0 US gal Radiator 4.8 US gal Engine 2.7 US gal Final drive, each side 0.29 US gal Swing drive 0.52 US gal Hydraulic tank 14.8 US gal Operating weight (approximate) Operating weight includes 12 ft. 2 in one-piece boom, 7 ft. 5 in arm, ISO 7451 heaped 0.26 yd3 bucket, blade, rated capacity of lubricants, coolant, full fuel tank, operator, and standard equipment.

Track Shoes Operating Weight Ground Pressure
Road liner 18 17,791 lbs. 5.20 psi Triple grouser 18 17,483 lbs. 5.20 psi Triple grouser 24 18,188 lbs. 3.90 psi Rubber shoe 18 17,438 lbs. 5.10 psi

Support you can count on
Kprime Tooth System
The Kprime Tooth System for construction is engineered for high performance, ease of use and extended periods between tooth changes in construction applications.

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Financing
Financing can be a major advantage for your operation, enabling you to get the equipment and service you need with terms to fit your balance sheet. Take advantage of competitive and flexible financial tools with Komatsu financing.

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