Part of the John Deere Repair Manuals.
This is the factory John Deere technical manual for the 2140 tractor, built 1980 to 1986, the same book dealer mechanics used. It covers the whole machine: the 3920 cm3 four cylinder diesel, fuel and air intake, the twin 12 volt electrical system with full wiring diagrams, the power train from clutch through Hi-Lo unit and creeper to the final drives and PTO, hydrostatic and manual steering, brakes, and the full hydraulic system including rockshaft and selective control valves. You get real teardown and rebuild procedures, machine specific torque figures, a color coded hydraulic schematic, and step by step tests for the complaints these tractors actually develop, like weak lift and shifting trouble. Cab, air conditioning, and roll guard sections are in there too.
What's Inside This John Deere 2140 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-183 | Specifications, Special Tools, Pre-Delivery Inspections, Lubrication and Service, Tractor Separation |
| Engine | 184-189 | Specifications, Radiator, Tune-Up, Engine Oil, Cooling System |
| Fuel and Air Intake System | 190-213 | Fuel Tank, Air Cleaner, Speed Control Linkage, Cold Weather Starting Aids |
| Electrical System | 214-435 | Batteries, Alternator, Starting Motor, Wiring Diagrams, Lighting Systems |
| Power Train | 436-730 | Engine Clutches, Transmission, Differential, Final Drives, PTO |
| Steering System and Brakes | 731-860 | Hydrostatic Steering, Power Steering, Manual Steering, Brakes |
| Hydraulic System | 861-1088 | Hydraulic Pumps, Rockshaft, Selective Control Valves, Hose Couplers |
| Miscellaneous | 1089-1113 | Front Axle, Belt Pulley, Front and Rear Wheels, Trailer Hitch |
| Operator's Cabs | 1114-1234 | Air Conditioning, Ventilation and Heating, Operator's Seats, Roll Guard |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Number of cylinders | 4 | p. 5 |
| Displacement | 3920 cm3 (239 cu.in.) | p. 5 |
| Compression ratio | 16.8:1 | p. 5 |
| Maximum torque | 270 Nm (199 ft-lb) at 1600 rpm | p. 5 |
| Rated engine speed | 2500 rpm | p. 6 |
| PTO horsepower (DIN 70020) | 54 kW (74 hp) at 2500 rpm | p. 6 |
| Batteries | 2 x 12 volts, 55 or 66 Ah | p. 7 |
| Alternator with internal regulator | 14 volts, 33 or 55 amps | p. 7 |
| Starting motor | 12 volts, 3 kW (4 hp) | p. 7 |
| Engine oil capacity (with filter) | 8.5 liters (2.25 U.S. gals) | p. 9 |
| Fuel tank capacity (plastic) | 102 liters | p. 9 |
| Cooling system capacity (with cab) | 15 liters | p. 9 |
| Front wheel toe-in (MFWD) | 0 to 3 mm | p. 11 |
| Torque: rockshaft cylinder to housing cap screws | 70 Nm (50 ft-lb) | p. 874 |
| Hydraulic pump flow (40 cm3 pump, quick test) | 45 liters/min (12.0 gpm) | p. 900 |
John Deere 2140 Common Problems This Manual Covers
Hydraulics lose lift, act slow, or leave oil on the ground
Follow the diagnostic test sequence in the Hydraulic System section for no lift, slow function, or hot oil, then check the listed external leak points: loose pipes, O-rings, shaft seals, cracked housings, before condemning the pump.
Manual Section: Hydraulic System - Diagnosing Malfunctions and Tests p. 893Transmission oil pressure light on, hard or balky shifting
Start with the transmission oil filter: when it blocks completely the bypass opens, oil never reaches the shift cover, and the light glows. The Power Train section covers the filter, shift cover, and pressure checks in order.
Manual Section: Power Train - Description, Operation and Lubricating System p. 489Hi-Lo unit drops itself into low range
That is the built in protection, not a random fault: below 500 to 700 kPa system pressure the unit shifts to low to keep the disks from slipping and burning. The manual shows how to test pressure and find why it fell.
Manual Section: Power Train - Hi-Lo Shift Unit p. 515Wheel and roll guard hardware working loose
The manual prints machine specific tightening torques in Nm and ft-lb for rear wheels, roll guard, rockshaft, lift arms, and sway blocks, not a generic SAE bolt chart, so you can retorque after service and at the intervals given in the lubrication schedule.
Manual Section: General - Torques for Hardware p. 12Frequently Asked Questions
My 2140 has weak or no hydraulic lift. Does this manual actually help me chase it down?
Yes, and this is where the book earns its money. It lays out a full test sequence for no hydraulics, slow hydraulic function, and overheated hydraulic oil, then lists the external leak suspects to check first: broken or loose pipes, leaking O-rings and seals, cracked housings. On these tractors weak lift is usually worn seals or a leak somewhere, not one dead part, so a structured test order beats swapping parts blind. p. 899
The transmission oil pressure light came on. What does the manual say to check?
One documented cause on the 2140: a fully blocked transmission oil filter. The bypass valve opens, no oil reaches the transmission shift cover, and the indicator light glows. The manual walks you through the filter, the oil circuit, and the shift cover so you can rule out the cheap fix before pulling anything heavy apart. Related note: the Hi-Lo unit deliberately drops to low range if system pressure falls below 500 to 700 kPa to protect its disks, so odd range behavior can also point back to pressure. p. 489
Are there real wiring diagrams, or just a parts style sketch?
Full printed wiring diagrams for the Bilux lighting system with numbered connections, plus sections on the twin 12 volt batteries (55 or 66 Ah), alternator, starting motor, and the harnesses themselves. This is a fully mechanical 1980s tractor, so there are no fault codes to read, tracing wires with the diagram is how you fix electrics on it, and this book is the only place those diagrams live. p. 360
Can I adjust the clutch pedal myself with this manual?
Yes, it is a simple job once you see the procedure. The manual has you set free travel to about 25 mm (1 inch) by slackening the hex nut, pulling the clevis pin, and turning the yoke on the clutch rod. It also covers full clutch removal and overhaul if the adjustment no longer takes up the wear, which requires splitting the tractor, and the separation procedure is in the General section. p. 31
Does it cover my transmission? The 2140 came with several options.
All of them. The Power Train section covers the synchronized and collar shift transmissions, the Hi-Lo shift unit, and the creeper transmission, plus the differential, final drives, and PTO. The hydraulic section even includes a color coded circuit diagram specific to synchronized and collar shift tractors, so you can follow oil flow for your exact configuration. p. 436
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