John Deere 6620 | 7720 | 8820 Combine Operators Manual

1 6620 Combine S/n 0-551,900 7720 Combine S/n 0-551,900 8820 Combine S/n 0-551,900JD-O-OMH111330 John Deere MODEL: THIS IS A Manual PRODUCED BY JENSALES INC. WITHOUT THE AUTHORIZATION OF JOHN Deere OR IT'S SUCCESSORS. JOHN Deere AND IT'S SUCCESSORS ARE NOT RESPONSIBLE FOR THE QUALITY OR ACCURACY OF THIS Manual . TRADE MARKS AND TRADE NAMES CONTAINED AND USED HEREIN ARE THOSE OF OTHERS, AND ARE USED HERE IN A DESCRIPTIVE SENSE TO REFER TO THE PRODUCTS OF OTHERS. 6620, SIDE HILL 6620, 7720, AND 8820 COMBINES Operators Manual 6620, SIDE HILL 6620, 7720, AND 8820 COMBINES OMH111330 11 English HARVESTER WORKS OMH11133011 1 Contents Page Contents .. 1 Safety .. 2 Operator's Station .. 6 Engine Break-In .. 18 Prestarting Checks .. 19 Operating the Engine .. 21 Driving the Combine .

2 26 Transporting .. 29 Lighting and Signals .. 30 Fuels and Lubricants .. 32 Lubrication and Maintenance .. 38 Fundamentals of Combine Harvesting .. 51 Headers .. 63 Feeder House .. 67 Separator .. 124 Grain Tank and Unloading Auger .. 178 Engine Service .. 186 Electrical System .. 202 Monitors .. 208 Hydraulic System .. 213 SideHill Leveling System .. 217 Power Train .. 224 Air Conditioner and Heater .. 252 Trouble Shooting .. 257 Storage .. 279 Specifications .. 282 Index .. 290 Engine Oil Dipstick Engine Break-in Radiator Cap Engine Break-in The engine is ready for normal operation. Be extra cautious during the first 100 hours. unnecessary engine idling. If Combine will beidling longer than five minutes, stop the coolant temperature gauge closely. If tem perature rises to green with white striped warningzone, shift to a lower gear or reduce load.

3 Unlesstemperature quickly drops, stop engine and deter mine ZoneB-Green ZoneC-Green with White StripesD-Red engine oil and coolant levels for any signs of you become thoroughly familiar with the soundand feel of your new Combine , be extra 1 Hour of Operation Check Torque on All Wheel Bolts: Drive Wheels 300 ft-lbs (400 N m) Steering Wheels 150 ft-lbs (203 N m) After 5 Hours of Operation Check all V-belts for initial stretch. Tighten as neces sary. Continue to check V-belts every few hours for the first 50 hours. Check alternator belt and adjust if nec essary. Torque the eight 3/4-inch machine bolts attaching separator uprights to drive wheel axle: Side Hill 6620 .. 300 ft-lbs (407 N m) 6620, 7720 and 8820 .. 200 ft-lbs (271 N m) After 100 Hours of Operation Drain crankcase oil, change filter, and refill.

4 See lubri cation section. Repeat this procedure every 200 hours or once a season, whichever occurs first. Replacing Upper Belt 1. Pull out on bottom of shield, then remove. 2. Loosen nuts (A). 3. To loosen idler, hold nut (8) with a wrench and turn adjusting bolt (C) until hole (E) moves down from gauge (D). A-Nuts B-Nut C-Adjusting Bolt D-Gauge E-Hole 4. When idler is loose remove cap screw (F) and shield with sheave. 5. Remove belt. 6. Replace belt. See belt adjustment next page. F-Cap Screw Replacing Lower Belt 1. Loosen lock nut to back off tension on idler. 2. Lift up on lower tightener and slide lower belts out. 3. Replace belt. Feeder House 115 Specifications 285 6620 AND SIDEHILL 6620 COMBINES-Continued Separator Type .. Straw walkers Width .. 44 in. (1 118 mm) Total Separating Area.

5 7939 sq. in. (with Beater Grate) .. ( m2) Total Separating Area .. 7944 sq. in. (with Adjustable Finger Bar) .. ( m2) Chaffer Width .. 42 in. (1 069 mm) Length .. 61 in. (1 542 mm) Sieve Width .. 42 in. (1 064 mm) Length .. 46 in. (1 168 mm) Total cleaning area of chaffer and sieve ..4478 sq. in. ( m2) Straw Walkers Number of walkers .. 4 Number of steps .. 6 Length .. 150 (3 810 mm) in. Total area of walkers .. 6593 sq. in. ( m2) Grain Tank Capacity .. 166 bu. ( m3) Unloading Rate .. bu. per sec. (.07 m3) Weights (less header) 6620 Grain Combine .. 15,912 Ibs. (7 218 kg) 6620 Corn Combine .. 16,266 Ibs. (7 378 kg) 6620 Edible Bean Combine 15,982 Ibs. (7 250 kg) 6620 Rice Combine .. 16,494 Ibs. (7 481 kg) SideHili 6620 Grain Combine .. 18,007 Ibs. (8 168 kg) SideHili 6620 Corn Combine .

6 18,075 Ibs. (8 199 kg) Capacities Fuel Tank .. 82 gals. (311 L) Cooling System .. 33-112 qts. ( L) Includes 1-112 qts. ( L) for heater Engine Crankcase (including filter) .. 21 qts. (20 L) Transm iss ion .. 11 qts. (10 L) Final Drives 6620 .. 11 to 90 Ratio-10 pts. ( L) 11 to 104 Ratio-11 pts. ( L) SideHili 6620 .. 12 pts. ( L) Variable Speed Feeder House or Long Length Fixed Speed Feeder House Reverser Drive Gear Case (6620 only) .. 2 pts. ( L) Hydraulic System (Including Lines and Components) 6620 .. 24 qts. (22 L) SideHili 6620 .. 31 qts. (28 L) Hydrostatic Drive System (Including Lines and Components) .. 30 qts. (29 L) Power Rear Wheel Drive (6620 only) .. 5 additional gal. ( L) to the hydrostatic drive system 286 Specifications 7720 Combine Engine Make.

7 John Deere Model .. Posi-Torq 6466TH-05 Hydrostatic 6466TH-02 Type .. 6-cylinder, in-line, valve-in-head, diesel, turbocharged Brake Horsepower .. 145 (108 Kw) Posi-Torq 165 (123 Kw) Hydrostatic Displacement .. 466 cu. in. (7 640 cm3) Bore and Stroke .. x in. (116 x 121 cm) Compression Ratio (clean engine only) .. to 1 Firing Order .. 1-5-3-6-2-4 Engine Speeds Fast Idle (Separator engaged-no load) .. 2340 rpm (Separator engaged-full load) .. 2200 rpm Slow Idle .. 1200 rpm Electrical System.. 12-volt negative ground Air Cleaner .. Dry type with safety element Thermostats (2) .. 180 F (82 C) Transmission ..4 speeds Brakes .. Hydraulic shoe Operator's Cab Heater Capacity .. 18,000 BTU/HR ( Kw) Air Conditioner capacity .. 22,000 BTU/HR ( Kw) Feeder House 7720 Grain.

8 Regular-length, fixed-speed belt drive 7720 Corn/Soybean .. Regular-length, Variable-speed belt drive with reverser 7720 Rice .. Long-length, fixed-speed belt drive with reverser Cylinder Type .. Rasp-Bar Spike-Tooth Diameter .. 22 in. (559 mm) Num ber of bars.. 8 rasp-bar 10-spike tooth Width .. 55 in. (1 397 mm) Concave Type .. 14 bar open-type or spike-tooth Area .. 1150 sq. in. (.742 m2) Beater Grate Type .. open bar-type Area .. 502 sq. in. (.324 m2) Finger Bar Type .. adjustable Area .. 534 sq. in. (.344 m2) Separator Type .. Straw walkers Width .. 55 (1 395 mm) in. Total Separating Area .. 9874 sq. in. (with Beater Grate) .. ( m2) Total Separating Area .. 9906 sq. in. (with Adjustable Finger Bar) .. ( m2) Chaffer Width .. 53 in. (1 341 mm) Length .. 61 in. (1 542 mm) Sieve Width.

9 53 in. (1 339 mm) Length .. 46 in. (1171 mm) Total cleaning area of chaffer and sieve .. 5637 sq. in. ( m2) Straw Walkers Number of Walkers .. 5 Number of steps .. 6 Length .. 150 in. (3810 mm) Total area of walkers .. 8222 sq. in. ( m3) Grain Tank Capacity .. 190 bu. ( m3) Unloading Rate .. bu. per sec. (.07 m3) Weights (less header) 7720 Grain Combine .. 17,598 Ibs. (7 982 kg) 7720 Corn Combine .. 17,921 Ibs. (8 152 kg) 7720 Rice Combine .. 18,428 Ibs. (8 359 kg) Capacities Fuel Tank .. 100 gals. (379 L) Cooling System .. 33-1/2 qts. ( L) Includes 1-1/2 qt. ( L) for heater Engine Crankcase (including filter) .. 21 qts. (20 L) Transmission .. 11 qts. (10 L) Final Drives .. 11 to 104 Ratio-11 pts. ( L) Variable Speed Feeder House or Long Length Fixed Speed Feeder House Reverser Drive Gear Case.

10 2 pts. ( L) Hydraulic System (Including Lines and Components) .. 24 qts. (22 L) Hydrostatic Drive System (Including Lines and Components) .. 30 qts. (29 L) Power Rear Wheel Drive .. 5 additional gal. to the hydrostatic drive system 288 Specifications DIMENSIONS Dimensions are with Combine equipped with standard equipment tires and radio antenna clipped to roof. SideHili 6620 6620 Standard Equipment Tires .. Cleat (R-1) Cleat (R-1) A. Height (Grain Tank Flip-Up In Up Position) .. 13 ft. 13 ft. 3 in. (3 962 mm) (4 038 mm) B. Height (Grain Tank Flip-Up In Down Position And Exhaust Pipe At Highest Point) .. 12 ft. 8 in. 12 ft. 11 in. (3 861 mm) (3937 mm) C. Width .. 12 ft. 4 in. 13 ft. (3 760 mm) (3 962 mm) D. Wheel Tread .. * 10ft. ( m) E. Unloading Auger Discharge Height.