User manual ZENOAH KOMATSU PC78UU-6 BROCHURE

[. . . ] FLYWHEEL HORSEPOWER 40. 5 kW 54 HP @ 1850 rpm OPERATING WEIGHT 7670 kg 16910 lb BUCKET CAPACITY 0. 28 m3 0. 37 yd3 PC 78UU COMPACT HYDRAULIC EXCAVATOR Photos may include optional equipment. www. Komatsu. com Printed in Japan 200805 IP. As(05) Form No. [. . . ] This function can help increase productivity by letting operators focus more on digging in tight or confined spaces. PC78UU-6's superior traveling speed and power also provide higher movility Round form uses Tight Tail and Forward Facing Design The PC78UU design uses a Tight Tail concept for both ends. This makes rotating the machine fast, easy and confident. There is less to worry about in tight space conditions because there is little protrusion from either the tail end or the front end. Digital Depth Display Ditching, trenching, or digging is even more efficient with this automatic depth measurement system. Informing the operator of dig depth from ground level (absolute depth) and the depth from any pre-set point (relative depth) enables work to go much more smoothly and efficiently. This lessens the need for the operator to stop operation or leave the cab after each adjustment, which also increases productivity. Back fill blade The PC78UU features a standard back fill blade that can quickly and conveniently fill trenches and clear up jobsites. Photo may include optional equipment. 2440mm 8'0" 1200mm 3'11" 1240mm 4'1" Lessen implement radius 550mm 1'10" Lessen tail swing radius 510mm 1'8" New pressure-compensated CLSS hydraulic system HydrauMind Even when 2 or more actuators are operated simultaneously, the PC78UU-6's pressurecompensated CLSS system ensures that each actuator works according to its control input without affecting the size of the load. This gives the operator precise control at all times. Engine speed sensing=Optimum Power Power utilized by main pump is adjusted automatically in accordance with the engine speed. That means this computerized system keeps engine speed even under high load condition. Road & Bridge Work 180-degree swing width 2540mm 8'4'' PC60 2 3 PC78UU-6 SPECIFICATIONS SPECIFICATIONS ENGINE Model Type Aspirator Number of cylinders Piston displacement Flywheel horsepower (SAE J1349 NET) Komatsu S4D95LE-3 Water-cooled, 4-cycle, direct injection Turbocharged 4 3. 26 Itr 199 in3 40. 5 kW 54 HP @ 1850 min-1 1850 rpm COMPACT HYDRAULIC EXCAVATOR DRIVES AND BRAKES Two levers with pedals Steering control Fully hydrostatic Drive method Variable displacement, axial piston motors Hydraulic motors 65. 1 kN 6640 kg 14639 Ib Maximum drawbar pull 4. 5 km/h 2. 8 mph Maximum travel speed: High 3. 0 km/h 1. 9 mph Low Mechanical disk Parking brakes LIFTING CAPACITY PC78UU-6 Arm : 1720mm 5'8" Bucket width : 650mm 25. 6" Shoe width : 450mm 17. 7" 1. 5m 4' 3. 0m 9' Cf Cs Cs Cf Blade on ground 4. 5m 14' Cf Cs Cf *2150 *4750 *2590 *5710 *2750 *6060 *6430 *14170 *6430 *14170 *3200 *7050 *3750 *8260 *4060 *8950 *3970 *8760 *3640 *8030 *3690 *8130 *3640 *8030 *3690 *8130 *3550 *7840 *2760 *6100 2530 5590 2480 5480 2300 5070 2030 4490 1810 3990 1690 3740 1670 3680 1710 3770 *2350 *5190 *2490 *5490 *2580 *5700 *2540 *5600 *2250 *4970 1080 2380 1010 2230 940 2070 880 1950 860 1910 *1810 *3990 *1760 *3890 *1830 *4030 *1990 *4390 *2200 *4850 *2200 *4850 *2160 *4770 *2020 *4460 *1340 *2970 Maximum Cs *2150 *4750 1730 3810 1140 2530 890 1970 770 1700 720 1590 730 1620 830 1840 1110 2440 *1340 *2970 Unit : kg lb 6. 0m 19' 5. 0m 16' 4. 0m 13' 3. 0m 9' 2. 0m HYDRAULIC SYSTEM UNDERCARRIAGE Type HydrauMind (Hydraulic Mechanical Intelligence New Design) system, Closed-center system with load-sensing valve and pressure-compensated valve Track Adjustment of the track tension Number of shoes Number of carrier rollers Number of track rollers Ground Pressure Grease 39 each side 1 each side 5 each side 0. 33 kg/cm2 4. 7 psi 6' 1. 0m 3' 0. 0m 0' -1m -3' -2. 0m -6' -3. 0m -9' Pump: Variable displancement, axial piston For implement 80. 0 Itr x 2 = 160 Itr/min 42. 2 USgal/min Maximum flow Fixed displacement gear For swing and blade 60 Itr/min 15. 9 USgal/min Maximum flow 113 Itr/min 29. 9 USgal/min Auxiliary Hydraulic flow (opt. ) Valve rating : 270 kg/cm2 3839psi Relief valve setting for implement Relief valve setting for swing and blade 210 kg/cm2 2986psi Bucket digging force (ISO) 6250 kg 13780 lb Arm crowd force (ISO) with arm length 1720 mm 5'8" 3960 kg 8730 lb OPERATING WEIGHT (APPROXIMATE) Operating weight including 1720 mm 5'8" arm, bucket with 0. 28 m3 0. 37 yd3 capacity, blade, operator, lubricant, full fuel tank, and standard equipment. Shoe Width 450 mm 17. 7" Operating Weight 7670 kg 16, 910 lb *Load is limited by hydraulic capacity rather than tipping. [. . . ] The low noise levels of the engine helps reduce fatigue and can make the operator even more comfortable. EASY EASY MAINTENANCE MAINTENANCE Thin potentiometer adopted and built in Hydraulic hose built in COMPACT HYDRAULIC EXCAVATOR Low noise design cab 73dB(A) Engine hood can be opened and closed even in confined areas Control pattern change valve(optional) Air cleaner with easily replaceable element Aluminum oil cooler and radiator are corrosion resistant and easy to clean One fuel system inspection window for fast and easy maintenance Whether you are comfortable with ISO or SAE control patterns, you can easily and consciously change from one to the other. Photo:Rigid seat Window washer tank is easy to check and refill Smaller and longer lasting hydraulic oil filter: Ecowhite element Upper-rail type sliding door opens and closes smoothly Housing the wiper motor has greatly improved visibility Air conditioner Large capacity air conditioning system combined with carefully placed vents provide optimum cool air flow. Wide-opening side hood makes daily inspection simpler Easy check of battery liquid level Large and accessible toolbox Main valve can be easily inspected Work equipment greasing interval is 250h (100h for armtop only) Large fuel filler with strainer Standard equipment Suspension seat (optional) Inclined track frame top DT connector Waterproof seal Waterproof seal Face seal Waterproof seal Larger opening reduces fuel back splash. Defroster Cup holder Ceiling window The track frame is sloped so that dirt will not be accumulate and can be removed easily. Water-resistant DT connectors are used for the parts which water will be splashed over. O-ring face seals having high sealing performance are used for the hydraulic piping joints. 4 5 [. . . ]