6908 EXCAVATOR III ENGINE PERFORMANCE Litho in U.S.A. C-5-83 (Replaces page dated 1-81) IASTEk' FEATURES 131-SAE-net-hp (98 kW) turbocharged John Deere diesel
Non-Current Excavators | Construction | John Deere US
"-6908 EXCAVATOR III ~ ~ IASTEk' '. -~ ENGINE PERFORMANCE Nm Ib-ft 515 380 488 :360 TOROUE- I-- 461 340 " ' '" 434 320 f- 401 3001 wW::J 380 280 HORSEPOWER hp kW >- 140 104 aw: g/kWh .w..J 274 ir243 213 ib/ 120 hph 0.45 100 0.40 I-- r-- 0.351 FUELCONSUMPTION L 140011600 1800 20I00 220b2-400 89 "wUJ 75 I fwZ ENGINE SPEED-RPM ~/ FEATURES 131-SAE-net-hp (98 kW) turbocharged John Deere diesel 21-ft. (6.40 m) digging depth 3Q-ft. (9.14 m) reach at ground level Two-lever, all-hydraulic pilot control of boom, crowd, bucket, and 36Q-degree continuous swing Simultaneous operation of digging functions and propel Tractor track-type undercarriage with metalfaced seals for rollers and idlers Two-speed propel Standard and wide-gauge models Hydraulic track adjustment Hydrostatic drive with independent propel motors for counterrotation Planetary gear reduction with multiple wetdisk brakes Vandal protection M~TER Litho in U.S.A. C-5-83 (Replaces page dated 1-81) 8-6908-1 "'- ~ 6908 EXCAVATOR SPECIFICATIONS (Specifications and design subject to change without notice. Wherever applicable, specifications are in accordance with PCSA and SAE Standards. Except where otherwise noted, these specifications are based on a unit equipped with 36.in. (gOOmm)bucket, full fuel tank, 175 lb. (79 kg) operator and standard equipment.) Power (@ 2400 engine rpm): SAE DIN Gross 141 hp(105kW) Net ... .. . .. . .. .. . ... .131hp (98 kW) 133hp (98 kW) Net engine fiywheel power is for an engine equipped with fan. air cleaner, water pump, lubricating oil pump, fuel pump, alternator, and muffler. The gross engine power is without fan. Power ratings are under SAE standard conditions of 500-ft. (150 m) altitude and 85'F (29.5'C) temperature, and DIN 6270 conditions (non-corrected). No derating is required up to 10,000 ft. (3050 m) altitude. Engine: John Deere turbocharged diesel, vertical 6-cylinder, valve-in head, 4 stroke cycle Bore and stroke Piston displacement 4.25x4.75in.(108x121 mm) 404cu.in.(6.621 L) Compression ratio 15.5t01 Maximum torque @ 1500 rpm .376Ib-ft (510 Nm) (52 kg-m) NACC or AMA (U.S. Tax) horsepower. . . . . . . . . . . . . . . . . . . . . .43.3 Lubrication. . . . . . . . . . . . . . . . . . . . .Pressure system w/full-flow filter Cooling. . . . . . . . . . . . . .Pressurized w/thermostat and fixed bypass Fan Blower Aircleanerw/restrictionindicator Electricalsystem Dry 12-voltw/alternator Batteries (2) 6-volt .Reserve capacity: 420 minutes Hydraulic System: Two open-center pumps mounted in tandem are coupled directly to the flywheel. Total flow is 84 gpm (5.30 Us) at rated engine rpm. System operating pressure is 2500 psi (17238 kPa) (175.7 kg/cm2). Relief valves: Boom (2) 3000 psi (20 685 kPa) (210.9 kg/cm2) 3750 psi (25 856 kPa) (263.6 kg/cm2) Crowd (2) 3000 psi (20685 kPa) (210.9 kg/cm2) OilBfuiltcrkaettio(2n). . . . . . . . . . .. . .. .3.0.0T0wpos1i0(2-m0 i6c8r5onkfiPltae)rs(2in10re.9tukrgn/lcinme2s) Track Rollers and Idlers: 9 rollers and 1 idler per track. All rollers and idlers have metal-faced seals. Idlers have heavy-duty spring recoil mechanisms. Through- .. hardened steel slides support and guide upper track. Track Shoes: Width Shoes Ground Contact Ground Pressure ~ 24 in. (610 mm) Triple 6136 sq. in. 6.5 psi (44.8 kPa) semigrousers (39 588 cm2) (0.46 kg/cm2) 24 in. (610 mm) Single bar 6136 sq. in 6.5 psi (44.8 kPa) (optional) grousers 30 in. (760 mm) Triple (39 588 cm2) (0.46 kg/cm2) 7670 sq. in. 5.2 psi (35.8 kPa) (optional) semigrousers (49484 cm2) (0.37 kg/cm2) Cab: Steel, with polyurethane acoustical treatment. Cushioned neoprene floor mat. Tinted safety glass side and rear windows. Tinted polycarbonate roof window. Safety glass split front window can be stored overhead. Seat: Fully adjustable, foam-cushioned seat. Controls: 'I All hydraulic functions are pilot controlled for excellent metering capacity and low operator effort. Two hand levers control swing, boom, arm and bucket functions. Right and left pedals control forward, reverse, and counterrotate movements. Boom and Arm: Tapered box construction with heat-treated steel bushings. Machined and bored after welding for accurate alignment. Cylinders: Bore Rod Diameter Boom(2) 5 in. (127mm) 2.75 in. (70mm) Crowd and bucket. . . . . . . . . . 5.5 in. (140 mm) 3.25 in. (83 mm) All cylinders have phenolic wear rings. Boom and crowd cylinders have a built-in hydraulic cushion at each end of the stroke. Bucket cylinder has hydraulic cushion at rod end. Full-frontal hydraulic oil cooler is in front of engine coolant radiator. Operating Information: Swing speed 7rpm Diggingdepth 21ft.(6.40m) Reach at ground level from center of rotation. . . . . . .30 ft. (9.14 m) Dumping height 15ft.(4.57m) Bucket tangential digging force: 24,30, or.36 in. (610, 760 or 900 mm) bucket .25,780 lb. (115.55 kN) (11694 kg) 48 in. (1.22 m) bucket .30,945 lb. (138.70 kN) (14037 kg) 60 in. (1.52m) bucket 24 or 29 In. (610 or 740 mm) 33,981 lb. (152.31 kN)(15414kg) rock bucket. . . . . . . . . . . . . .26,695 lb. (119.65 kN) (12 109 kg) 35 in. (890 mm) rock bucket 29,210 lb. (130.93 kN) (13250 kg) Arm digging force: 24,30, or 36 in. (610, 760 or 900 mm) bucket .13,290 lb. (59.57 kN) (6028 kg) 48 in. (1.22 m) bucket. . . . . . . . . .14,065 lb. (63.04 kN) (6380 kg) 60 in. (1.52 m) bucket. . . . . . . . . .14,465 lb. (64.84 kN) (6561 kg) 24 or 29 in. (610 or 740 mm) rock bucket .13,475 lb. (60.40 kN) (6112 kg) 35 in. (890 mm) rock bucket. . . . .13,880 lb. (62.21 kN) (6269 kg) Gradability 70percent Travel(2speed) - - a I /~ ? ;: 7zI1'1 ~Swing Mec anism: OtoO.9mph(1.45km/h) 0 to 1.7 mph (2.74 km/h) Swing 360-degree,continuous Turntable bearing. . . . . . . . . . . . . . . . .Single row, ball, internal drive Lubricated case-hardened ring and pinion gears. Undercarriage: Propel motors (one for each track) .High-torque 2-speed hydraulic motors with planetary drives. Wet multiple-disk brakes automatically release while propelling, and apply when stationary. Independent drive to each track permits counterrotation. Undercarriage, car body, and track frame. . . . . . . . . . . . .Each track frame is a formed, reinforced U-channel. Track frames are joined by reinforced boxed car body with swing bearing mount. Servicing and Vandal Protection: Swingaway service doors expose built-in-service platforms for easy access to engine and hydraulic systems. Crank-operated bolts secure service doors. Cab and access covers to fuel tank, radiator, and air filters lock with switch key. Capacities: Fueltank Cooling system Enginelubrication Engine lubrication, including filter Hydraulicsystem Planetary propel drive Swing drive U.S. 60gal. 11.25gal. 18qt. 20qt. 80gal. 10qt. 8qt. Liters '--""'" 227.1 42.6 17.0 18.9 302.8 9.4 7.5 Additional Standard Equipment: Alternator charge indicator light Cab heater Counterweight, center, 290 lb. (131 kg) Counterweight 4330 lb. (1964 kg) Deluxe seat Electric hourmeter Engine coolant temperature gauge Engine oil pressure gauge ~ Ether starting aid Fuel gauge Horn Hydraulic oil filter pressure warning light Hydraulic oil temperature gauge Key switch Pilot controls Positive-position hand throttle Special Equipment: Air conditioner Counterweight, 2000 lb. (910 kg) Double flanged rollers Grouser shoes, single bar, 24 in. (610 mm) Manual controls Ripper tooth, 500 lb. (230 kg) Semigrouser shoes, triple, 30 in. (760 mm) Side cutter attachments for rock bucket Track guides Window protection kit "-.J- 8-690B-2 ,-- 6906 EXCAVATOR SPECIFICATIONS "--" 10f1.1O1n. (3.30m) 2 fl. 11 in. (889 mm) '--'" I -+ 8ft.5in. (2.57m) 21 fl. 1 in. (6.43 m) 29 ft. 6 in. (8.99m) "Buckets: High-strength steel, ribbed and plated bottom section Nominal 24 in. (610 mm) 30 in. (760 mm) 36 in. (900 mm) 48 in. (1.22 m) 60 in. (1.52 m) 24 in. (610 mm) rock '---" 29 in. (740mm)rock 35 in. (890 mm) rock Bite Width 25.4 in. (645 mm) 31.4 in. (798 mm) 37.4 in. (950 mm) 49.4 in. (1.25 m) 60.0 in. (1.52 m) 26.0 in. (660 mm) 31.0 in. (787 mm) 37.0 in. (940 mm) Capacity SAE - -- Struck 9/16 cu. yd. (0.43 mJ) 3f4cu. yd. (0.57 mJ) 'l'8 cu. yd. (0.67 mJ) 1 cu. yd. (0.76 mJ) 13/8cu. yd. (1.05 mJ) V2 cu. yd. (0.38 mJ) 0/8cu. yd. (0.48 mJ) 3f4cu. yd. (0.57 mJ) 3f4cu. yd. (0.57 mJ) 'l'8 cu. yd. (0.67 mJ) 5/8cu. yd. (0.48 mJ) 3f4cu. yd. (0.57 mJ) 3f4cu. yd. (0.57 mJ) Y2 cu. yd. (0.38 mJ) 5/8cu. yd. (0.48 mJ) 5/8cu. yd. (0.48 mJ) Weight 1000 lb. (454 kg) 1100 lb. (500 kg) 1200 lb. (544 kg) 1200 lb. (544 kg) 1200 lb. (544 kg) 1380 lb. (626 kg) 1500 lb. (680 kg) 1525 lb. (692 kg) "See bucket selection chart page 4. '--" Weights: Operating weight, excavator less bucket: Standard gauge """""""""""""'" Widegauge ................................. Upper structure (without boom and undercarriage) . Undercarriage: 24 in. (610 mm) shoes. . . . . . . . . . . . 30in.(760mm)shoes ............ Boom less cylinder ............................. Arm less cylinder, 108.14 in. (2.75 m) """""" Boomcylinder(2) .............................. Arm cylinder .................................. Bucketcylinderpluslinkage ..................... Counterweight ................................. Counterweight, optional......................... lb. kg. 38,300 17373 38,700 17554 12,470 5656 15,850 7190 16,030 7271 2,500 1134 1,440 653 510 231 470 213 650 295 4,330 1964 2,000 907 -'-../ Digging Depth and Rliich: Wz 5~ II: « ~lb ~i~ Feet Meters 20Je '1J0: :2 5 feet 5 ~ meters 1 5 10j: 4 15 I 5 20 -+6 5 10 15 20 25 30 !-I. 23 ~4 ~5 .k---J. e7 J8. ~9 8-690B-3 6908 EXCAVATOR LIfting Capacities: Ratings at bucket 11fthook, machine situated on firm, level, uniform supporting surface. Total load includes weight of cables, hooks, etc. Boldface type Indicates hydraulic-limited capacities, lightface type indicates stability-limited capacities, in lb. (kg). Figures do not exceed 87 percent of hydraulic capacities or 75 percent of weight needed to tip machine. Add 15 percent to stability-limited capacities when optional 2000-lb. (910 kg) counterweight Is used. BOOM lifting, over front or rear, arm holding Horizontal distance lrom centerline 01 rotation: 15 ft. (4.57 m) 10 ft. (3.05 m) 5 ft. (1.52 m) Ground level 10 It. (3.05 m) o _ .L 13,910 lb. (6315 kg) 15 It. (4.57 m) 9,230 lb. (4190 kg) 10,630 lb. (4826 kg) 20 ft. (6.10 m) 5,360 lb. (2433 kg) 6,390 lb. (2901 kg) 7,260 lb. (3296 kg) 25 ft. (7.62 m) 4,260 lb. (1934 kg) 4,710 lb. (2138 kg) 5,250 lb. (2384 kg) 5,680 lb. (2579 kg) 30 It. (9.14 m) 4,210 lb. (1911 kg) -5 ft. (-1.52 m) 17,560 lb. (7972 kg) 10,970 lb. (4980 kg) 7,700 lb. (3496 kg) 5,810 lb. (2638 kg) -10 ft. (-3.05 m) 16,140 lb. (7328 kg) 10,380 lb. (4713 kg) 7,360 lb. (3341 kg) -15 ft. (-4.57 m) 12,340 lb. (5602 kg) 7,820 lb. (3550 kg) ARM lifting, over front or rear, boom holding. Horizontaldistancelrom centerline01rotation: 15 ft. (4.57 m) 10 ft. (3.05 m) 5 It. (1.52 m) Ground level 10 ft. _(3.05 m) ..L 11,320 lb. (5139 kg) 15 ft. (4.57 m) 14,830 lb. (6734 kg) 14,350 lb. (6516 kg) 20 ft. (6.10 m) 9,440 lb. (4286 kg) 9,550 lb. (4336 kg) 9,230 lb. (4191 kg) 25 It. (7.62 m) 6,460 lb. (2933 kg) 7,070 lb. (3210 kg) 6,770 lb. (3047 kg) 6,590 lb. (2992 kg) 30 It. (9.14 m) 3,320 lb. (1507 kg) -5 ft. (-1.52 m) 17,160 lb. (7791 kg) 14,270 lb. (6480 kg) 9,110 lb. (4137 kg) 6,530 lb. (2965 kg) -10 ft. (-3.05 m) 26,300 lb. (11 940 kg) 14,460 lb. (6566 kg) 9,210 lb. (4128 kg) -15 ft. (-4.57 m) 20,900 lb. (9489 kg) 13,520 lb. (6138 kg) BOOM lifting, over the side, arm holding, standard gauge, upper structure 90 degrees to tracks. Horizontal distance Irom centerline 01 rotation: 15 ft. (4.57 m) 10 ft. (3.05 m) 15 ft. (4.57 m) o 20 ft. (6.10 m) 25 ft. (7.62 m) 4,260 lb. (1934 kg) 30 It. (9.14 m) 10ft. (3.05m) 5,680 lb. (2579 kg) 4,130 lb. (1873 kg) 5 It. (1.52 m) Ground level "'-' ..L 8,260 lb. (3750 kg) 13,910 lb. (6315 kg) 7,850 lb. (3564 kg) 5,490 lb. (2493 kg) 3,860 lb. (1752 kg) 2,840 lb. (1289 kg) 5,190 lb. (2356 kg) 3,700 lb. (1680 kg) -5 ft. (-1.52 m) 14,610 lb. (6633 kg) 7,790 lb. (3537 kg) 5,090 lb. (2311 kg) 3,640 lb. (1653 kg) -10 ft. (-3.05 m) 15,020 lb. (6819 kg) 7,940 lb. (3605 kg) 5,180 lb. (2352 kg) -15ft. (-4.57m) 15,760 lb. (7155 kg) 8,386 lb. (3805 kg) ARM lifting, over the side, boom holding, wide gauge, upper structure 90 degrees to tracks. Horizontal distance lrom 10ft. centerline 01 rotation: (3.05 m) 15 ft. (4.57 m) 20 ft. (6.10 m) 25 ft. (7.62 m) 30 ft. (9.14 m) 15 ft. (4.57 m) 5,470 lb. (2483 kg) 10 It. (3.05 m) 7,340 lb. (3332 kg) 5,340 lb. (2425 kg) 5 It. (1.52 m) Ground level =-pIIi .L 10,830 lb. (4917 kg) 7,130 lb. (3234 kg) 5,060 lb. (2297 kg) 3,780 lb. (1716 kg) 13,910 lb. (6315 kg) 10,400 lb. (4722 kg) 6,820 lb. (3096 kg) 4,890 lb. (2220 kg) -5 ft. (-1.52 m) 17,560 lb. (7972 kg) 10,330 lb. (4690 kg) 6,720 lb. (3051 kg) 4,830 lb. (2193 kg) -10 ft. (-3.05 m) 20,570 lb. (9339 kg) 10,500 lb. (4767 kg) 6,810 lb. (3092 kg) -15 ft. (-4.57 m) 20,900 lb. (9489 kg) 10,960 lb. (4976 kg) 690B BUCKET SELECTION CHART RECOMMENDED BUCKET SIZE- Lb/Yd3 700 810 1242 1450 2000 2600 2700 3000 3200 3250 3300 3500 3500 4200 4300 4600 kg/m3 420 480 740 860 1186 1540 1600 1780 1900 1930 1960 2080 2080 2490 2550 2730 Material Wood Chips Peat Dry Peat Wet Cinders Topsoil Earth Dry Loam Sand Dry Coal Natural Bed Earth Moist Loam Sand Gravel Dry Sand Moist Sand Wet Shale Limestone Broken Clay Wet Rock Granite Blasted Standard Arm Regular Duty 5 cu. yd. 3.83m3 4.5 cu. yd. 3o44m3 3 cu. yd. 2.5 cu. yd. 1.8 cu. yd. 2.3 m3 1.9m3 104m3 1.38 cu. yd. 1m3 1.38 cu. yd. 1m3 1.21 cu. yd. 0.93m3 -Heavy Duty - - - - - - - - - - - 1 cu. yd. 1 cu. yd. 0.77m3 0.77m3 1.12cu.yd. 1.12cu.yd. 1.12 cu. yd. 1 cu. yd. -1 cu. yd. -0.88 cu. yd. 0.93m3 0.93m3 0.93m3 0.77m3 0.77m3 - -0.67m3 0.88 cu. yd. 0.88 cu. yd. 0.88 cu yd. 0.75 cu. yd. 0.75 cu. yd. 0.62 cu. yd. 0.62 cu. yd. 0.62 cu. yd. 0.67m3 0.67m3 0.67m3 0.57m3 0.57m3 Oo47m3 Oo47m3 Oo47m3 'Contact your John Deere dealer for optimum bucket selection. The use of larger than recommended buckets in heavy materials and tough digging conditions should be thoroughly analyzed for digging force and load capacity. Bucket capacity indicated is SAE heaped. 8-6908-4 --.,,- , '---" '--./ ~ ~ " r-- '/ . :-/~ '--' 6908 EXCAVATOR I 6908 Excavator less boom, arm, bucket linkage, hydraulic cylinders and bucket. '6908 Excavator upper structure only complete with cab, hydraulics, valves, etc., boom, arm, bucket linkage, hydraulic cylinders, upper tower assembly and swing bearing. Less crawler undercarriage, ~ tracks, bucket, lower tower assembly and rotary manifold. -~ ) '/ I '6908 Excavator upper structure complete with cab, hydraulics, valves, upper tower assembly and swing bearing. Less crawler undercarriage tracks, boom, arm, bucket linkage, hydraulic cylinders, bucket, lower tower assembly and rotary manifold. 'Note: Lower tower assembly and/or rotary manifold can be ordered separately if required in combination with these options only. ~/ 8-6908-5Adobe PDF Library 5.0