PC78US-6

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Engine   
Model    Komatsu S4D95LE-3 
Type    Water-cooled, 4-cycle, direct injection 
Aspiration    Turbocharged 
Number of cylinders   
Piston displacement  199 in³  3.26 ltr 
Flywheel Horsepower (SAE J1349 NET) @1850 rpm.  54 HP  40.5 kW 
Hydraulics   
Type    HydrauMind (Hydraulic Mechanical Intelligence New Design) system, Closed-center system with load-sensing valves and pressure-compensated valves 
Main pump:     
Type    Variable displacement, axial piston 
Maximum flow  42.2 US gal/min  80.0 ltr x 2 = 160 ltr/min 
Type ( for machine with blade)    Fixed displacement gear 
Maximum flow  15.9 US gal/min  60 ltr/min 
Auxiliary Hydraulic Flow  32.5 US gal/min  123 ltr/min 
Valve rating:     
Relief valve setting  3839 psi  270 kg/cm² 
Bucket digging force (ISO)  13,780 lb  6250 kg 
Arm crowd force (ISO):     
With Arm length 5'5'' / 1650 mm  9,330 lb  4230 kg 
Electric System   
Operating voltage    24 V 
Battery    55 Ah 
Alternator    24 A 
Starter    3.0 kW 
Swing System   
Driven method    Hydrostatic 
Swing speed    10.0 rpm 
180-degree swing width  9'10''  2990 mm 
Drive and Brakes   
Steering control    Two levers with pedals 
Drive method    Fully hydrostatic 
Hydraulic motors    Variable displacement, axial piston motors 
Maximum drawbar pull  14661 lb / 6650 kg  65.2 kN 
Maximum travel speed:     
High  2.8 mph  4.5 km/h 
Low  1.9 mph  3.0 km/h 
Parking brakes    Mechanical disk 
Undercarriage   
Track Adjustment of the track tension    Grease 
Number of shoes (each side)    39 
Number of carrier rollers (each side)   
Number of track rollers (each side)   
Ground Pressure  4.4 psi  0.31 kg/cm² 
Operating Weight (APROXIMATE)   
Operating weight including 5'5'' arm / 1650 mm, bucket with 0.37 yd³ / 0.28 ³ ISO 754 capacity, blade, steel shoes, operator weight, liquids, full fuel tank, and standard equipment. 
Shoe width  17.7"  450 mm 
Operating weight  15,850 lb  7190 kg 
Coolant and Lubricant Capacity   
Fuel tank  33 US gal  125 ltr 
Radiator  2.8 US gal  10.5 ltr 
Engine Oil (refilling)  1.8–2.0 US gal  7.0–7.5 ltr 
Hydraulic (refilling)  16.9–29.1 US gal  64–110 ltr 

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