John Deere MODEL: 2020 Serial Number 0-117,500 Volume 1 of 2 JD-S-SM2072

Transcription

1 John Deere MODEL: 2020 Serial Number 0-117,500 Volume 1 of 2 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. JD-S-SM2072

2 SERVICE MANUAL.JOHN DEERE 2020 SERIES TRACTORS CONTENTS Description and Specifications Tractor Separation..... Periodic Lubric~tion.... Engine Tune-Up and Tractor Adjustment Basic Engine.... Engine Lubrication System.... Governor and Speed Control Linkage Engine Cooling System Fuel Systems Electrical System Engine Clutches and PTO Clutches Transmission and Differential Hi-Lo Shift Unit... Reverser... Continuous-Running PTO. Transmission-Driven PTO Independent PTO.. Belt Pulley.... Final Drive System.. Hydraulic Brakes Manual Steering.. Power Steering (Open Center Type). Power Steering (Closed Center Type). Power Steering (Grove Tractors)... Front Axles, Front End. Support, and Steering Linkage Seats..! Hydraulic System.. Hydraulic Pumps.... Rockshaft and 3-Point Hitch i. Selective Control Valve.. Selective Control Valve.. Hose Couplers and Remote Cylinders. Drawbars Wheels, Tires, and Weights. Trouble Shooting... Special Service Tools '. Section SM-2072 (Jul-69) Litho in U. S. A.

3 Section 10 DESCRIPTION AND SPECIFICATIONS Group S DESCRIPTION Fig. 10-S-I-Right Side View HU Tractor John Deere 2020 Tractors are utility-type wheel tractors available in three basic styles: 2020 RU, 2020 HU, and 2020 LU. The 2020 Series Tractors are full four-plow units designed for general purpose farming. They are low-built for extra stability. A 2020 Grove Tractor is also available. This tractor is_ fully shielded for work in groves, orchards, and vineyards. These tractors are available with either gasoline or diesel engines. Other components of the various models are very similar. The main features of the tractors are described in the paragraphs which follow. Full descriptions of components are given in other sections throughout this manual. SERIAL NUMBERS The engine serial number is stamped on a plate at the right side of the engine cylinder block. The tractor serial number is located at the right side of the transmission case. NOTE: When ordering tractor and engine parts, record all the digits on the serial number pad. An explanation of the serial number digits is given on the next page. SM-2072 (Nov-66) Litho in U.S.A.

4 Specifications Tractors, 2020 Series Description and Specifications REAR WHEEL TREADS Tractor Axle Type Wheel Type Possible Tread Range* RU Models Rack and Pinion Demountable Rim Steel Disk Cast Cast Power Adjusted 48 inches to 76 inches 60 inches or 64 inches 50 inches to 78 inches 48 inches to 96 inches 48 inches to 80 inches HU Models Rack and Pinion Cast Cast Power Adjusted 50 inches to 78 inches 54 inches to 78 inches ( and ) 50 inches to 96 inches 54 inches to 96 inches ( and ) 56 inches to 80 inches LU Models Demountable Rim Steel Disk 40 inches to 64 inches 47 inches or 52 inches * Due to fender interference, minimum tread width on R U Tractors is 50 inches for 13.6 x 28 tires and 52 inches for 16.9 x 24 tires. On HU Tractors (with rack and pinion axle) minimum tread is 50 inches for 12.4 x 36 tires and 52 inches for 13.9 x 36 tires. On LUTractors, minimum tread widths are 40 inches for 11.2 x 24 tires and 12.4 x 24 tires, and 48 inches for 14.9 x 26 tires. FRONT WHEE L TREADS Axle Type Tire Size Wheel Treads (inches)* Swept-back 6.00 x to 72-9/ /16 (RU) max. with wheels reversed x /8 to 74-3/ / x 16 max. with wheels reversed x to 69 inches with wheels dished in. Straight 6.00 x to /8 max. with (RU and wheels reversed. HU) 7.50 x /8 to 75-5/ / x 16 max. with wheels reversed. Swept-back All (LU) 44 to max. with wheels (Short Knee) 7.50 x 16 (RU) reversed. Extra Wide 6.00 x /8 to 86-3/8-91-1/2 Straight max. with wheels reversed. (HU) 7.50x15 60 to m ax. with wheels reversed. Extra Wide 6.00 x to max. with wheels Straight reversed. (RU) 6.50 x to /2 max. with 7.50 x 15 wheels reversed x 16 * Wheel treads are changed in two-inch steps. SM-2072 (Mar-68) Litho in U.S.A.

5 Separating Rockshaft From Transmission Tractors, 2020 Series Tractor Separation Group 25 SEPARATING ROCKSHAFT FROM TRANSMISSION IMPORTANT: Use care and cleanliness when working on any hydraulic system. The smallest amount of dirt or;joreign matter, scratch, nick or burr can make a hydraulic sys tem inoperative. Check for evidence of leakage in hydraulic system before removal. Disconnect battery ground straps for safety. Remove transmission case top shield. Disconnect leads from starter safety switch. Remove seat assembly from rocks haft housing (Section 210). Disconnect hitch lift links from rockshaft arms. Disconnect coupler lines (if equipped) from rear of selective control valve. Remove oil return hose between selective control valve and rocks haft housing. Fig. ; Removing Rockshaft Housing Place the load selector lever in the "L" position so that the load selector link with roller will guide over the cam follower during removal (Fig ). Attach one JD-244 engine adapter to top of rocks haft housing as shown in Fig Remove attaching cap screws from rockshaft housing (arrows, Fig ). Using chain hoist, lift rockshaft housing from transmission as shown in Fig NOTE: Cover rockshaft opening in top of transmission to keep out dirt or foreign matter. Fig Rockshaft Attaching Points SM-2072 (10-65) Litho in U.S.A;

6 Oil Pump and Oil Filter Tractors, 2020 Series Engine Lubrication System PUMP T 9783 Fig, Measuring Clearance Between Pump Gears and Body Fig lnstalling Oil Pressure Regulating Valve Bushing Remove damaged bushing and press new bushing into block using JD-248 tool (Fig ). Press in bushing until outer recessed edge of bushing is flush with bottom of counterbore in block. IMPORTANT: Do not press on raised inner rim of bushing. This rim is the regulating valve seat. Check oil pressure regulating spring for rusty or fractured coils. If spring is damaged in any way, replace it. Check threads on pressure regulating valve plug for damage. Replace if necessary. T 9784 Fig_ Measuring Clearance Height of Pump Gears Place a straightedge across top of housing (to represent cover) and measure clearance between gears and straightedge (See "Specifications"). Replace gears and (or) housing if necessary. OIL PRESSURE REGULATING VALVE AND SEAT Check pressure regulating valve for damage and replace if necessary. Inspect regulating valve seat in front of cylinder block for damage (especially at raised rim of bushing). If regulating valve bushing must be replaced, remove radiator and engine timing cover for access. (See Section 80, Group 10 and Section 50, Group 30 for details.) SM-2072 (Jul-69) Litho in U. S. A. OIL FILTER Unscrew filter element from engine and discard it. Inspect oil passages at mounting point on cylinder block or obstructions. If filter base nipple in block is damaged, refer to Section 50, Group 15 for replacement details. ASSEMBLY NOTE: Refer to Figure for correct relationship of parts. Press idler shaft (12) into pump housing until flush with outer surface of housing. Using JD-253 Tool or other suitable tool, press bushing (13) into shaft bore of housing until flush with surface inside housing. Place gear and shaft in housing. Install pump idler gear on idler shaft in housing. Check to see that both gears rotate freely in housing. Install new O-ring (17) in oil outlet opening in oil pump cover.

7 Tractors, 2020 Series Transmission Driven PTO Shafts and Controls NOTE: To service the PTa disconnect, remove counters haft and low and high range shifter shafts from transmission as instructed in Section 120, Groups 10 and 15. Fig R~moving PTO Dis(:onnect Holding shifter collar, remove PTO drive shaft from transmission (if not removed). Remove shifter collar. Fig Pressing Powershaft from Quill To replace powershaft or bearing, remove snap rings and press off old bearing (Fig ). Press on new bearing until snap rings fit in grooves. Remove lock wire around set screw and remove screw securing shifter to shaft. Rem.ove snap rings and washers from end of shifter shaft. Slide shaft out front of transmission case and remove shifter from transmission case. Rem.ove roll pin securing shifter arm to shifter lever and remove lever and arm from transmission case. PTO POWERSHAFT INSPECTION AND REPAIR Inspect powers haft for wear or damage. Inspect bearing in powers haft quill for damage. Fig Powershaft Qui II Oil Seal Inspect powershaft quill for damage. Check for evidence of leakage around oil seal (Fig ). If necessary, remove old seal and press in new seal (with lips of seal facing driver) to bottom of bore in quill. SM-2072 (10-65) Litho in U.S.A.

8 Steering Valve Tractors, 2020 Series Power Steering (Grove Tractors) BEARING SUPPORT, BEARING, VALVE SPOOL, AND SHAFT Fig S-Removing Rotor Retaining Ring Remove rotor retaining ring (Fig ) with pair of snap ring pliers and a small screwdriver. Pull out both rmg dowel pins. Fig Bearing Support and Shaft Tap end of shaft with mallet until bearing support (Fig ) rises out of housing. Remove bearing support. Fig Valve Spool and Shaft Assembly Fig Rotor and Ring Assembly Remove rotor and ring assembly (Fig ) by pulling upward on the ring with a slight rocking motion. Pull on valve spool shaft (Fig ) until the whole assembly slides freely out of the housing. Do not use force. Spool and bore tolerances are very small and forcing could cause the spool to jam and damage parts. If the spool binds or jams, push the assembly back into bore and attempt removal again. SM-2072 (Nov-66) Litho in U.S.A.

9 1 INDEX Air cleaners Alternator (Motorola) Alternator belt adjustment Alternator testing (Motorola).... Antifreeze.... Auxiliary hydraulic reservoir..... Axles, front ','..... Axle housings.... A B Page Balancer, engine Ballast Basic engine Batteries Bearings, engine main Belt, alternator, adjustment Belt pulley Bleeding diesel fuel system Bleeding the brakes , Bleeding remote cylind~rs Block, cylinder, engine Brake cylinder Brake disks Brake operating valve Brakes, hydraulic Brake pressure plate..., Brake pressure ring Brake valve... " Breakaway coupler Cam dwell, distributor Camshaft, engine Capacities, tractor Carburetor (Marvel-Schebler).... Carburetor adjustment Carrier, planet pinion.... Centrifugal advance, distributor... Choke, carburetor Cleaning cooling system c Cleaning fuel tank Clutch adjustment, engine and continuous running PTO Clutch controls, engine and PTO... Clutch, engine Clutch pedal free travel..... Clutch, PTO Clutch shafts, engine.... Clutch shafts, engine and continuous running PTO Coil, ignition.... Compression test, engine Connecting rods, piston.... Control valve, rockshaft.... Control valve, selective.... Controls, brake Controls, continuous running PTO.. Controls, rockshaft Controls, transmission driven PTO. Cooler, hydraulic oil.... Cooling system, engine Countershaft.... Couplers, breakaway.... Couplers, disconnect Crankshaft, engine.... Cylinder, block.... Cylinder, head.... Cylinder, remote.... Cylinder sleeves Cylinder, steering (Grove tractor).. Demountable rim wheels Description, general Diesel fuel inj ection pumps (Roosa- o Page Master) Diesel fuel specifications Diesel fuel system , Diesel fuel system, bleeding of Differential Differential lock SM-2072 (Nov-56) Litho in U.S.A.

10 2 Tractors, 2020 Series Index Page Difficulties, index of Dimensions, tractor Disk, brake Distributor , Distributor point gap Distributor points , Distributor timing , Drawbar Dry-charged batteries Dust cup unloader valve Dynamometer tests E Electrical system Electrical system specifications Electrical tests on tractor Electrolyte level, battery Elements, diesel fuel filter Engine bal~cer Engine balancer drive gear Engine, basic Engine cap screw torques Engine clutch..., Engine clutch adjustment Engine installation Engine lubrication system Engine oil filter Engine oil pressure Engine oils Engin.e removal Engine speeds (diesel) Engine speeds (gasoline) Engine specifications Engine timing , Engine tune-up F Page Fuel filter, diesel Fuel injection pumps, diesel {Roosa- Master} Fuel injection nozzles {Roosa-Master}... " Fuel system, diesel , Fuel system, gasoline , Fuel tanks Fuel transfer pumps G Gasoline carburetors Gasoline fuel system , Gasoline fuel specifications Gears, transmission Governor, gasoline Ground speeds... ; Guides, valve Hand throttle Hi-Lo shift unit.... Hitch, 3-point.... Horsepower.... Hydraulic pump shut-off Hydraulic pump specifications.... Hydraulic pumps: Main hydraulic pump Power steering pump Transmission pump.... Hydraulic oil cooler Hydraulic reservoir Hydraulic system Hydrulic system tests Hydraulic valves.... H Fan assembly, radiator.... Fan belt adjustment Filter, engine oil.... Filter, fuel, diesel.... Filter, hydraulic oil.... Final drive system Flywheel..... Foot throttle.... Front axles Front mounted main hydraulic pump Front tires Ignition coil Inflation chart, tire Injection nozzles (Roosa-Master).. Injection pumps, diesel (Roosa-Master).... Injection pump, timing of.... Inserts, connecting rod SM-2072 (Nov-66) Litho in U.S.A.

11 Tractors, 2020 Series Index Liners, cylinder.... Load control mechanism Lock, differential.... Lubrication system, engine Lubrication timetable Main bearings Main hydraulic pump Manual steering assembly Marvel-Schebler carburetor L M N Page Nozzles, injection (Roosa-Master) Oil cooler.... Oil filter, engine.... Oil filter, hydraulic.... Oil filter, relief valve.... Oil pressure adjustment, engine... Oil pump, engine o p Periodic lubrication timetable Piston pins Piston rings Pistons Planetary, final drive..., Plugs, spark , Points, distributor , Power steering (open center)..., Power steering (closed center) Power steering (Grove tractors) Power steering pump (open center) Pulley, belt Pumps, diesel fuel injection Pump, engine oil Pumps, fuel Pump, water Pump, hydraulic: Main hydraulic pump Power steering pump Transmission pump.... Radiator.... Radiator cap Regulator, voltage.... R Remote cylinder selective control valve.... Remove cylinders Repairing fuel tank.... Reservoir, hydraulic oil Rings, piston Rockshaft.... Rockshaft control lever Rockshaft cylinder and valve housing Rockshaft flow control valve.... Page Seat, deluxe Seat, regular Selective control valve Separating the tractor Shafts, transmission Shift unit, Hi-Lo Shifter controls, transmission Sleeves, cylinder Spark plug specifications Spark plugs , Special tools Specific gravity, battery Specifications Fuels.... Electrical system.... Engine.... Hydraulic pumps Power steering (open center).... Transmission and differential... Speed control adjustment, diesel... Speed control adjustment, gasoline. Speed control linkage Speeds, tractor.... Starting motors (Delco-Remy).... Steering, manual Steering, power (open center)..... Steering, power (closed center).... Steering, power (Grove tractor)... T Tanks, fuel Tappet adjustment, valve , Testing electrical system Testing hydraulic system Thermostat Three-point hitch Throttle control linkage, diesel Throttle control linkage, gasoline Timing diesel injection pump Timing distributor , SM-2072 (Nov-66) Litho in U.S.A.

12 4 Tractors, 20'20' Series Index Pqge Tire inflation chart... " 28, Tire sizes '-5-1, 2&:0'.. 10';..1 Tires..., '-5-1; 289,.19,.1 Too!s,special service ao<t5'.. 1 Torque chart.., O'rol,S-6 Torques,engme cap screw., '4O'~lO'ro5 Tractor adjustme~...,...,. 40'.;;1.5-1 Tractorseparation '.,.5-1 Clutch hous mg, '-10'... 1,,~O'... 1, E~m~...,.., '... 10'-1 Fmal dr~ve... '..,.; 26-~-1 Fronte~d,gupport. v,'. " 29..."5,,,,1 Bockshaft... ; ~25-1 Tf<},~$m~$sion Tr~SmiS$lQ~. ',',',' "..... " Transmls$i and'diff~rentjal",speci;,. :;t:i,:,lications" 'i/.'::':'-~" <t,.,- ~' "'-)', 0 -:t",. _i-:. '. ",t'.-~. l.ssl.on P'tlmp. T, < issi~)a$llafts~l}dgears.. Tt~SmiSsiQnS'hifter':ciont:tols..," T~~tl'bles,,'Clutch 20'-20'-1 f120"' '~~O'.. JO-1 ''1'20.;;152:1 t20~,to':"1 f,29o' '.;;'1'5.. 1," 2~O'-'25-1 :2~~:"lO... 1 f~5.;;lo'.;.1 Hydraulic system difficulties... TransmiSsion difficulties Tune-up;erigme.... v P~e 290'-30'-1 290'-20'-1 40'-10'-1 Valve,;,.f;!learatice, engine '-10'-6 Valve~,~~tcup\,lnloader... 90'-20'-1,91-40'-1 Valve,Hi... Lo,~hift.., Valve~'~g~kshaitcohtrol '..;10'-1 y-illve~~es,ehgine '-10-1 Yalve;j,~lective. control '-5-1 Yalves,'~teer~g '-10'-1, '-1 's '-1 V!al~e$".prake,...'...;., '-10'-1 50'-10'-1 220'-10' '0'-15-1 Vli!.l'tes ".., V!~lv is,v~ltage,"'~~~~ator 80'-15-1 Whe~l 28O'-5-~~ 280'-10'-1 Wheel """",&hh,,' '-15-1 Wheels.. 280'-15-1 WIfmg diagr~ms, electtical '0'-40'-1