Part of the John Deere Repair Manuals.
If your tractor is a John Deere 2020, this is the coverage that fits: TM1044, the factory John Deere 2020 technical manual PDF, 260 pages spanning gasoline and diesel engines, collar shift transmission, Hi-Lo, reverser, and both continuous and independent PTO. Wiring diagrams trace the charging, starting, ignition, and lighting circuits, while hydraulic schematics map the rockshaft, steering, and selective control valve circuits through diagnosis and testing. The hydraulic section alone fills roughly a quarter of the book. Set the distributor point gap between 0.018 and 0.022 inch, and pull rear hub bolts to 300 ft-lb before a wheel works loose in the field. A guessed torque on a flanged axle costs you a second teardown; the spec costs nothing to look up. Download the bookmarked PDF, print the section for the job, and let those pages take the grease on the bench while the master copy stays clean.
What's Inside This John Deere 2020 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 5-24 | Specifications, Predelivery, Delivery, And After-Sale Services, Tune-Up |
| Engine | 25-70 | General Information and Diagnosis, Cylinder Head, Valves, And Camshaft, Cylinder Block, Liners, Pistons, And Rods |
| Fuel System | 71-84 | Diagnosing Malfunctions, Diesel Fuel System, Gasoline Fuel System |
| Electrical System | 85-118 | Information and Diagrams, Charging Circuit, Starting Circuit, Ignition Circuit, Lighting and Accessory Circuits |
| Power Train | 119-186 | Clutches, Hi-Lo Shift Unit, Reverser, Collar Shift Transmission, Differential, Final Drive, Continuous and Transmission PTO, Independent PTO |
| Steering and Brakes | 187-188 | Steering Valve, Steering Piston, Steering Shaft, Brake Valve, Brake Piston, Equalizing Valve |
| Hydraulic System | 189-256 | General Information, Diagnosis, And Tests, Miscellaneous Hydraulic Components, Hydraulic Pumps, Steering Systems, Hydraulic Brakes, Rockshaft System |
| Miscellaneous | 257-260 | Front Axle |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Front hub bolts (Tires 6.00-16 or smaller) | 85 ft-lb | p. 8 |
| Front hub bolts (Tires larger than 6.00-16) | 100 ft-lb | p. 8 |
| Points | 0.020 in. | p. 14 |
| Fan belt adjustment | 3/4-inch deflection, 20 lb. force | p. 24 |
| Distributor point gap | 0.018 to 0.022 in. | p. 14 |
| Spark plug size | 14mm, 3/4-in. reach | p. 115 |
| Spark plug gap | 0.025 inch | p. 115 |
| Engine Cylinder Head Cap Screw Torque | 110 ft-lbs | p. 14 |
| Hydraulic System Standby Pressure | 2250 psi | p. 6 |
| Engine Oil Pressure (at high idle) | 45-65 psi | p. 15 |
| Transmission Pump Flow | 6 gpm at 2500 rpm | p. 16 |
| Main Hydraulic Pump Standby Pressure | 2200 to 2300 psi | p. 16 |
John Deere 2020 Common Problems This Manual Covers
John Deere 2020 gas engine cranks strong but will not start, only fires with choke pulled full
Check the sediment bowl and strainer for water and rust before touching the carburetor. Drain the bowl, clean the screen, and confirm fuel flows freely to the carb. Then set the point gap to 0.020 in. per the tune-up specs on page 14 and gap the plugs to 0.025 inch.
Manual Section: Fuel System Diagnosis p. 71Hydraulic pump squeals and shudders when cold, rockshaft lifts slow and steering whines
Check transmission-hydraulic fluid level first; a squeal on cold mornings usually means the pump is sucking air through a low reservoir or a plugged intake screen. Drain, clean the screens, and change the filter. Then gauge the system: standby pressure should read 2250 psi per the spec on page 6.
Manual Section: Hydraulic System Diagnosis p. 189PTO shaft keeps spinning with clutch pedal all the way down, baler will not stop
Adjust the clutch linkage free play first; a dragging PTO clutch is often linkage worn out of adjustment, not a failed pack. Follow the clutch procedures in the Power Train section starting on page 119. On independent PTO tractors, verify the transmission pump delivers 6 gpm at 2500 rpm before splitting the tractor.
Manual Section: Power Train p. 119Starter clicks or turns over slow, only cranks after tapping the housing with a hammer
Clean and tighten both battery cables and the ground strap before blaming the starter; tapping that wakes it up points to worn brushes or a sticking solenoid. Trace the circuit with the wiring diagram on page 87. If you remove the start-safety switch while testing, torque it to 29 to 32 ft-lbs on reinstall.
Manual Section: Starting Circuit DiagnosisBrakes pull to one side or pedal goes to the floor after sitting over winter
Bleed both brake lines and check the equalizing valve for a stuck piston; uneven pressure is what pulls the tractor toward one side. Inspect the brake valve and pistons per the Steering and Brakes section on page 187. Verify hydraulic standby pressure holds 2250 psi, since these power brakes lose the pedal when supply pressure drops.
Manual Section: Steering and Brakes p. 187Engine runs hot in the field, fan belt squeals under load at full throttle
Adjust the fan belt to 3/4-inch deflection under 20 lb. of force per the adjustment specs on page 24; a loose belt slips at rated speed and quits turning the fan. Replace a glazed belt outright. Then work through the overheating checks in the engine diagnosis charts starting on page 26 before harvest runs.
Manual Section: Engine Diagnosis p. 26Frequently Asked Questions
What is the torque specification for the John Deere 2020 engine-to-clutch housing bolts?
The torque specification for the engine-to-clutch housing bolts is 170 ft-lbs. p. 24
What is the correct fan belt tension for the 2020 tractor?
The fan belt should be adjusted to have a 3/4-inch deflection when a 20 lb. force is applied. p. 24
What is the intake valve clearance for the 2020 tractor engine?
The intake valve clearance for both gasoline and diesel engines is 0.014 inch. p. 34
What is the crankcase oil capacity for the 2020 tractor?
The engine crankcase capacity is 6 U.S. quarts, which includes the filter. p. 17
What is the standby oil pressure for the John Deere 2020 hydraulic system?
The standby oil pressure for the hydraulic system is 2250 psi. p. 6
What do I get after purchasing this John Deere 2020 manual?
Instant PDF download. You get the full 260-page searchable Technical Manual immediately after payment. Open it on your laptop, tablet, or phone right in the shop.
Is this John Deere 2020 Technical Manual printable?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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