User manual CATERPILLAR 621G BROCHURE

[. . . ] 621G/627G Wheel Tractor Scrapers ® Engine Tractor Engine Net Power Scraper Engine Net Power Heaped Capacity Rated Load Cat ® C15 with ACERT ® technology 246/272 kW 330/365 hp Cat C9 with ACERT technology 178/198 kW 239/266 hp 3 17 m 22 yd3 23 950 kg 52, 800 lb 621G/627G Wheel Tractor Scrapers Responsible, productive earthmoving machines, built to last. Power Train ­ Engine Electronically controlled Caterpillar engines with ACERT technology, modular radiator with 9 fins per inch, and an Electronic Control Module maximizes power to the cutting edge and exceptional haul road speed. 4 ® Power Train ­ Transmission Planetary powershift transmission delivers excellent load capability. Redesigned front and rear axles accommodate wider brake shoes and drums. The neutral coast inhibitor and programmable top gear reduce wear while increasing machine performance. [. . . ] These have been replaced by electronic controls, reducing maintenance costs and increasing machine availability. The Cat Comfort Cloth Seat has an adjustable seat and armrests for maximum operator comfort. · Swivels and locks in four positions (0º, 10°, 20° and 30º) providing the optimum operating position in the cut or on the haul. Fore/aft and vertical height adjustment to accommodate various sized operators. Seat Suspension. It features a high performance air shock absorber with its own air compressor. Increases legroom a full 3. 5 inches (89 mm), and reduces knee contact points. Standard Air Conditioning. Convenient storage location includes space for a lunch box and first aid kit. The cab also has a cup holder as well as an ashtray. · 8 Visibility. Hood and front shroud width increased to accommodate the low emission engine, the air-to-air aftercooler (ATAAC), ether starting aid, and lights. Hood corners are sloped to maintain the same level of visibility as the E-Series. Simple and easy to operate, the joystick enhances the productivity of operators of all skill levels. Requires less force to control the critical scraper functions and requires less lever travel. Grab handle/ hand rest next to joystick controller so operator has a place to rest hand while on the haul and return roads. 1) Bowl (forward & back) 2) Ejector (side to side) 3) Thumb rocker switch · Apron position · Elevator direction, speed 4) Transmission Hold 5) Cushion Hitch 6) Trigger* (not shown here ­ is on front of joystick) · Auger (on/off) · Push-Pull (bail up/down) · Elevator (on/off, resume) * Standard open bowl does not have a trigger 1 (Down) 4 5 3 2 (Forward) 2 (Return) 1 (Up) Instrument Display Panel. Features a quad-gauge layout showing engine coolant temp, transmission/torque converter oil temp, fuel level, and system air pressure. Once the 627G tractor engine has been started, the operator can start the rear engine from inside the cab. EMS III can display both front and rear engine information right in the cab. Frequently used switches and indicator lights are on the instrument panel, and less frequently used switches on the overhead console. Engine Speed Lock Controller. Enhances operation during long haul cycles by allowing the operator to maintain a desired engine speed without maintaining pressure on the accelerator. Simplifies gear selection (1st, 2nd, Drive and Reverse) and allows operator-defined top gear control. Relocating the gear control to the rear increases operator legroom. 9 Structures Superior structural design and construction optimize performance and reliability. 1 2 3 4 5 6 7 8 Load cylinder Hitch castings Scraper gooseneck Nitrogen accumulators Orifice Oil from tractor hydraulic system Leveling valve Free floating pistons Cushion Hitch. The electronically actuated cushion hitch incorporates a parallelogram-type linkage for exceptional strength with nitrogen accumulators to deliver a smooth ride for enhanced operator comfort. [. . . ] Make detailed comparisons of the machines under consideration before purchase. Cat dealers can estimate component life, preventive maintenance cost, and the true cost of lost production. 15 Engine Tractor Engine Scraper Engine Cat C15 ACERT Cat C9 ACERT Transmission 1 Forward 2 Forward 3 Forward 4 Forward 5 Forward 6 Forward 7 Forward 8 Forward Reverse 5 kph 7. 6 kph 10. 9 kph 14. 8 kph 19. 9 kph 26. 9 kph 36. 4 kph 51. 5 kph 9. 2 kph 3. 1 mph 4. 7 mph 6. 8 mph 9. 2 mph 12. 4 mph 16. 7 mph 22. 6 mph 32 mph 5. 7 mph Tractor Engine Net Power ­ Gears 1-2 Net Power ­ Gears 3-8 Gross Power ­ Gears 1-2 Gross Power ­ Gears 3-8 Bore Stroke Displacement 246 kW 272 kW 268 kW 294 kW 140 mm 165 mm 15. 2 L 330 hp 365 hp 359 hp 394 hp 5. 5 in 6. 5 in 928 in3 Hydraulics Bowl Cylinder Bore Bowl Cylinder Stoke Apron Cylinder Bore Apron Cylinder Stroke Ejector Cylinder Bore Ejector Cylinder Stroke Steering Circuit Scraper Circuit Cushion Hitch Circuit Supplemental Steering Circuit Relief Valve ­ Steering Circuit Relief Valve ­ Implement Circuit · Flow rates measured at 1900 rpm · Supplemental steering measured at 24 km/h (14. 9 mph) 152 mm 813 mm 184 mm 597 mm 165 mm 1549 mm 209 L/min 284 L/min 37 L/min 150 L/min 15 500 kPa 15 000 kPa 6 in 32 in 7. 25 in 23. 5 in 6. 5 in 61 in 55 gal/min 65. 5 gal/min 9. 8 gal/min 39. 9 gal/min 2, 250 psi 2, 175 psi · Net power advertised is the power available at rated speed of 1800 rpm, measured at the flywheel when the engine is equipped with fan, air cleaner, muffler and alternator. Scraper Engine Net Power ­ Gear 1 Net Power ­ Gears 2-4 Gross Power ­ Gear 1 Gross Power ­ Gears 2-4 Bore Stroke Displacement 178 kW 198 kW 192 kW 213 kW 112 mm 149 mm 8. 8 L 239 hp 266 hp 258 hp 286 hp 4. 4 in 5. 9 in 538 in3 · Net power advertised is the power available at rated speed of 2200 rpm, measured at the flywheel when the engine is equipped with fan, air cleaner, muffler and alternator. Steering Steering Angle ­ Right Width ­ 180° Turn Steering Angle ­ Left Hydraulic Output 90° 10. 9 m 85° 209 L/min 35. 9 ft 55 gal/min Scraper Bowl Heaped Capacity Rated Load Struck Capacity Depth of Cut ­ Max. Apron Opening Apron Closure Force 17 m 23 950 kg 3 12 m 333 mm 3023 mm 522 mm 22 mm 150. 4 kN 215 kN 522 mm 1780 mm 107 kN 3 22 yd 52, 800 lb 3 15. 7 yd 13. 1 in 119 in 20. 6 in 0. 88 in 33, 840 lb 48, 375 lb 20. 6 in 70 in 24, 075 lb 3 · Optional supplemental steering system meets SAE J1511 (OCT 90) and ISO 5010 (1992) requirements · Steering circuit at 1900 RPM 16 621G/627G Wheel Tractor Scrapers specifications Service Refill Capacities ­ Tractor Crankcase Transmission Differential Final Drive (per side) Cooling System Hydraulic Reservoir Wheel Coolant (each) Windshield Washer 36 L 72 L 144 L 19 L 107 L 140 L 45 L 6L 9. 5 gal 19 gal 38 gal 5 gal 28 gal 37 gal 12 gal 1. 5 gal Standards · Rollover Protective Structure (ROPS) meets SAE J320a, SAE J1040 MAY 94, ISO 3471-1986 and ISO 3471-1994 · Falling Object Protective Structure (FOPS) meets SAE J231 JAN 81 and ISO 3449-1992 · The operator sound exposure Leq (equivalent sound pressure level) measured according to the work cycle procedures specified in ANSI/SAE J1166 OCT98 is 81 dB(A), for cab offered by Caterpillar, when properly installed and maintained and tested with the doors and windows closed. · Hearing protection may be needed when operating with an open operator station and cab (when not properly maintained or doors/windows open) for extended periods or in noisy environments. 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