Description

Komatsu Mini Excavator PC78US-11

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Komatsu Mini Excavator PC78US-11 , general specifications unit

Engine

Therefore, Engine Output : 65 HP, Bucket Capacity : 0.3 m3, Maximum digging reach/depth : 6360/4100 mm, Ground pressure : 0.29 kg/cm2, Model : Komatsu 3D88E-7* , Type : Water-cooled, direct injection , Number of cylinders : 3, Bore x stroke : 88 mm x 90 mm 3.46” x 3.54”, Piston displacement : 1.642 L 100.2 in3, Horse power SAE J1995 ISO 9249 / SAE J1349 : Gross 18.2 kW 24.4 HP, Horse power SAE J1995 ISO 9249 / SAE J1349 : Net 18.2 kW 24.4 HP, Horse power SAE J1995 ISO 9249 / SAE J1349 : Net 18.2 kW 24.4 HP : Rated rpm 2,200, Fan drive method for radiator cooling : Mechanical, *EPA Tier 4 Final emissions certified.

Hydraulics

In other words, Number of selectable working modes : 2, Main pumps : Type Variable displacement piston x 2 : Pumps for : Boom, arm, bucket and travel circuits, Maximum flow : 32 L/min 18.3 gal/min, Type : Gear x 2, Pumps for : Swing and blade. Swing pump maximum flow : 18.7 L/min 4.9 gal/min,  Swing pressure maximum : 20.1 MPa 2,915 psi,

However, Blade pump maximum flow 9.9 L/min 2.61 gal/min, Blade pressure maximum : 21.5 MPa 3,118 psi,  Max auxiliary flow rate : 50 L/min 13.2 gal/min, Hydraulic valve 8 spool Operating method Hydraulic assist Travel motor Type Variable displacement piston x 2, (with counterbalance valve and travel shaft brake) Swing motor Type Fixed displacement piston type x 1, (with brake valve and swing shaft brake)

For instance, Hydraulic cylinders (Number of cylinders – bore x stroke x rod diameter),

Boom (PC30MR-5) 1–85 mm x 525 mm x 50 mm 3.35” x 20.7” x 1.97”,

Arm (PC30MR-5) 1–75 mm x 595 mm x 45 mm 2.9” x 23.4” x 1.77”,

Bucket (PC30MR-5) 1–65 mm x 490 mm x 40 mm 2.55” x 19.29” x 1.57”,

Boom swing (PC30MR-5) 1–80 mm x 500 mm x 40 mm 3.14” x 19.6” x 1.57”,

Blade (PC30MR-5) 1–85 mm x 135 mm x 45 mm 3.34” x 5.11” x 1.77”.

Drives and brakes

Above all, Steering control Two levers with pedals Drive method Hydrostatic Maximum drawbar pull 249 kN 25,400 kg 56,000 lbs.

In addition, Gradeability 30° Maximum travel speed (rubber), High 4.6 km/h 2.85 mph (Auto-shift) Low 2.6 km/h 1.61 mph, Service brake Hydraulic lock Parking brake Mechanical disc Maximum drawbar pull 33 kN 3,400 kgf 7,495 lbf.

Undercarriage

After that, Center frame X-frame Track frame Box-section Track type Sealed Track adjuster Greased gun Number of carrier rollers (each side) 1. Number of track rollers (each side) 4

Coolant and lubricant capacity (refilling)

Similarly, Engine 6.7 L 1.77 U.S. gal Hydraulic system 20 L 5.3 U.S. gal Cooling system 3.3 L 0.87 U.S. gal.

Fuel tank 41 L 10.8 U.S. gal Final drive, each side 0.6 L 0.15 U.S. gal

Operating weight (approximate)

Komatsu Mini Excavator PC78US-11 Operating weight including 2,180 mm 7’2” (PC30MR-5) 2,540 mm 8’4” , (PC30MR-5) 1,720 mm 5’8”.

(PC30MR-5) .11 m3 3.88 ft3 bucket, blade, rated capacity of lubricants, coolant , full fuel tank, operator and standard equipment.