User manual ZENOAH KOMATSU D155A-5 BROCHURE

[. . . ] See page 4. A Komatsu-designed resilient equalized undercarriage (REU). Unique X-type bogies provide tremendous traction on uneven ground. Improves traction component durability and operator comfort. See page 6. Wet type multiple-disc steering clutches/brakes eliminate both clutch and brake adjustment for facilitating maintenance. [. . . ] On flat ground, REU functions as a conventional rigid undercarriage. On uneven terrain, the REU maximizes the suspension effect the shoes always follow the contour of the ground, ensuring a greater actual ground contact for greatly-improved drawbar pull. On flat ground Track frame Conventional Undercarriage There is minimal shoe slippage with the conventional low drive type undercarriage. The shoe slip limit has been substantially raised due to long tracks and large ground contact area. The large traction force thus obtained, in combination with high engine power, results in superb drawbar pull. With the low center of gravity, dynamic stability is excellent. Functions as a conventional rigid undercarriage. Ensures almost the same traction force as a conventional rigid undercarriage. On uneven ground Seesaw movement is performed corresponding to ground surface. Compared with a rigid type, the actual ground contact area increases and powerful drawbar pull is ensured because the track shoes follow the contour of the ground. Large deformation of the rubber pads contributes to greater suspension effect. Comfortable Ride on Uneven Ground Outer bogie Rubber pad Inner bogie Minimum Shock in Riding Over Obstacles Fall height A Conventional rigid type Suspension effect 4 1 Flat ground travel Rough terrain travel B A REU Obstacle height B Center Shaft: Fixed to track frame On uneven ground, the rubber pad provides four times the suspension effect. When riding over obstacles, the height of the machine fall is low. Track roller Frame Flat Bottom Frame The pivot shafts and monocoque frames prevent mud buildup. The design facilitates good maneuverability in muddy conditions and reduces the chance of hanging up on stumps or boulders. 6 7 D155A-5 CRAWLER DOZER ENGINE ENGINE Engine AND AND TORQUE CONVERTER TORQUE CONVERTER Fuel Efficient Engine The field-proven, rugged reliable Komatsu 225 kW 302 HP SA6D140E-2 provides high torque for efficient dozing power and high reliability and low fuel consumption. SPECIFICATIONS SPECIFICATIONS ENGINE Komatsu SA6D140E-2, water-cooled, 4-cycle, turbocharged and aftercooled, diesel engine, 6 cylinders with 140 mm 5. 51" bore x 165 mm 6. 50" stroke and 15. 24 ltr 930 in3 piston displacement. 225 kW 305 PS at 1900 rpm Maximum torque . 160 kg·m 1, 157 lb/ft @ 1250 rpm * Net flywheel horsepower output for standard engine (SAE J1349) including air cleaner, alternator (not charging), water pump, lubricating oil pump, fuel pump, muffler, and fan. STEERING Joystick controls for all directional movements. Simply tilt the joystick to the left to make a left turn. Pushing the lever forward results in the machine forwarding, while pulling it toward the operator reverses the machine. Gear shifting also possible with the single-steering lever. Wet, multiple-disc steering are spring-loaded hydraulically released. Wet, multiple-disc, pedal-controlled service brakes are springactuated and hydraulically released. Gearshift lock lever also applies service brakes. 3. 7 m 12'2" (As measured by track marks on ground. ) Modular Power Train Components Modular design has facilitated removal/ installation of power train components, shortening machine downtime. Wet, Multiple-Disc Brakes Automatic Preheating Mechanism The best preheating times is set automatically by sensing ambient temperature. This simplifies the preheating operation. Eliminate brake adjustments for maintenance-free operation. Direct-injection fuel system. Full-flow filter for lube oil purification. Dual element, dry-type air filters with automatic dust ejector and dust indicator. 2 x 12 V/170 Ah batteries. UNDERCARRIAGE Suspension. Oscillation-type with equalizer bar and forward mounted pivot shafts Track roller frame . [. . . ] Raise, hold, lower, and float Blade tilt . Right, hold, and left Additional control valve required for variable digging angle multi-shank ripper and giant ripper. Increase, hold, and decrease Hydraulic cylinders . Double-acting, piston Number of cylinders 2 1 2 2 Bore 120 mm 4. 72" 180 mm 7. 09" 160 mm 6. 30" 160 mm 6. 30" Blade Lift Blade Tilt Ripper Lift Ripper Tilt Hydraulic oil capacity (refilling): Semi-U tilt dozer . [. . . ]