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John Deere 2640 Troubleshooting
The
John Deere 2640 is a 2040-series utility tractor. This model was manufactured
from 1976 to 1982. The components of JD 2640 powerline system: John Deere 4
Cycle 4-cylinder diesel engine and a 8x4 collar shift transmission, or 2-Speed
powershift transmission with 16 forward and 8 reverse gears.
A 276 cubic inches engine output rating is 77 hp (57 kW) at 2500
rev/min. The maximum forward speed - 17.3 mph (27.8 kph), max. reverse
speed - 6.9 mph (11.1 kph). The closed center hydraulic system includes
a piston pump with flow rate of 13 gpm (49.2 lpm). The hydraulic system
pressure is 155 bar (2250 psi).
The tractor has a Cat.2 three-point hitch with a position control and
lower-link draft sensing. The tractor is equipped with 7.5x16 front
tyres and 16.9x28 rear tyres. The wheelbase is 85.8 inches (2170 mm).
| Engine Troubleshooting |
| Engine doesn't start or difficult to start |
| Dirty fuel filter element - Change filter element |
| The fuel shut-off valve is closed - Open fuel shut-off valve |
| Air in fuel lines - Bleed fuel lines |
| Fuel injectors are defective or dirty - Change fuel injectors |
| Fuel injection pump is broken - Rebuild or change fuel pump |
| Bad compression - Check cylinder block and replace worn parts |
| Engine shuts off unexpectedly while running |
| Engine is cold - Warm up to required temperature |
| There is air in the fuel system - Bleed the system |
| Improper fuel injection - Fuel injection settings required |
| Fuel filter is clogged - Replace the filter element |
| Fuel injectors are clogged or faulty - Clean or replace fuel injectors |
| Engine starts and stalls immediately |
| Incorrectly set fuel injection pump timing - Check and correct settings |
| Fuel filter clogging - Install new filter element |
| Fuel injector nozzles are dirty or defective - Replace fuel injector nozzles |
| Defective fuel injection pump - Replace or rebuild injection pump |
| Air cleaner element is clogged - Change or service air cleaner element |
| Engine stops while idling |
| Low idle speed adjustment is incorrect - Adjust low idle speed |
| Fuel injection pump is defective - Replace or repair injection pump |
| Fuel injector nozzles are dirty - Change injector nozzles |
| Valve out of adjustment - Adjust valve clearance |
| Low coolant level - Refill to the correct level. Check for coolant leaks |
| Cooling system components are damaged or system is dirty - Flush cooling system or replace faulty parts |
| Engine oil level low - Need to add engine oil |
| Improper fan belt tension or damaged belt - Change or adjust belt tension correctly |
| Thermostat is defective - Thermostat needs to be replaced |
| Clogged or damaged injectors - Service or change fuel injectors |
| Fuel injection pressure is wrong - Adjust to correct pressure |
| Air filter is dirty - Clean or replace the air filter element |
| Oil filter is dirty - Service or replace engine oil filter |
| Engine overloaded - Reduce load or shift to lower gear |
| Improper valve clearance - Adjust valve clearance |
| Improperly adjusted low idle speed - Correct the settings |
| Dirt in the fuel pipes or hoses - Clean fuel hoses and pipes |
| Engine lost compression: Leaking or broken valves - Install new valves |
| Abnormal engine knocking or noise |
| Fuel injection pump out of timing - Repair or replace fuel injection pump |
| Fuel injector nozzles are faulty - Change injector nozzles |
| Low engine oil level - Check and refill engine oil |
| Engine not warmed up - Warm up the engine |
| Crankshaft or main bearings are worn out - Replace crankshaft or bearings |
| Damaged or defective piston rings - Replace piston rings |
| Flywheel bolts are loose - Bolts need to be tightened |
| Excessive engine oil consumption |
| Oil leaks: Seals or gaskets are wearing excessively - New components need to be installed |
| Crankcase oil too light - Use oil of proper viscosity |
| Stuck or defective piston rings - Have piston rings replaced |
| Valve guides and stems are worn - Valves must be replaced |
| Pistons or cylinder liners are worn - Check pistons and liners, change as required |
| Electrical System Troubleshooting |
| Battery is not charging |
| Battery faulty cell - Battery change required |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Corroded or loose battery terminals and cables - Cables and terminals must be tightened or cleaned |
| Defective belt or improperly adjusted belt tension - Adjust belt tension properly or replace belt |
| Battery capacity is low - Low battery charging, charge as required |
| Battery runs out quickly - Service or replace the battery |
| Battery cable harness damage - Check battery cables for damage, change or repair |
| Corroded or loose cables and terminals - Cables and terminals must be tightened or cleaned |
| Battery power is low - Battery is drained, recharge it |
| Discharged or defective battery - Recharge or change battery |
| Starter motor is defective - Starter should be changed |
| Wiring is improperly connected or disconnected - Need to reconnect the wiring properly |
| Transmission Troubleshooting |
| Gear shift is hard |
| Worn or incorrectly adjusted clutch - Adjust or install new clutch |
| Gear shift linkage is loose or broken - Replace or repair the shift linkage |
| Damaged or worn shift forks - Replace defective shift forks |
| Defective gearshift mechanism - Replace defective components |
| Low transmission oil pressure |
| Insufficient fluid supply - Check transmission fluid level and add it as required |
| Transmission fluid filter element is dirty (if fitted) - Replace or clean transmission fluid filter |
| Faulty relief valve - Change the valve |
| Transmission is excessively noisy |
| Bearings are worn or cracked - Bearings replacement required |
| Insufficient oil supply - Add transmission oil as required |
| Transmission fluid contamination - Fill up with fresh transmission fluid |
| Backlash is incorrect or gears are worn - Set backlash properly or change the gears |
| Shift forks are worn or damaged - Shift forks need to be changed |
| Transmission fluid leaking |
| Broken gaskets or seals - Change defective seal or gaskets |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system is overheated |
| Hydraulic system pressure is unadjusted - Adjust the pressure as required |
| Main relief valve is defective or unadjusted - Adjust or replace the relief valve |
| Hydraulic oil contamination - Change the oil |
| Aeration in hydraulic system - Inspect the pump seals, suction pipe, and fittings |
| Insufficient hydraulic fluid pressure |
| Hydraulic oil level is low - Check oil level and add hydraulic oil as required |
| Hydraulic oil filter is dirty - Clean or replace the hydraulic filter |
| Hydraulic pump malfunction - Test the pump flow rate and change pump if required |
| Hydraulic control valve is defective or set improper - Replace or set correctly |
| Hydraulic cylinder malfunction - Inspect cylinder components for wear or damage and change if required |
| Leakage in hydraulic pipes - Identify leaks in the system and repair it |
| Hitch cannot be raised or raising is too slowly |
| Hydraulic oil level is insufficient - Fill the hydraulic system with oil |
| Cold hydraulic oil - Warm up the oil |
| Hydraulic fluid filter is clogged - Install a new hydraulic filter element |
| Faulty hydraulic oil pump - Check the pump performance and replace it if required |
| Main relief valve incorrect adjustment or failure - Adjust or change relief valve |
| Hydraulic control valve is faulty or out of adjustment - Change or adjust properly |
| Broken hydraulic cylinder - Inspect the hydraulic cylinder components for damage or wear and change if required |
| Damaged or loose suction line - Tighten or change |
| Hitch drops too slowly or can't drop |
| Defective or incorrect setting hydraulic spool valve block - Adjust correctly or replace |
| Faulty hydraulic cylinder - Check cylinder components for damage or wear and change if necessary |
| Hitch rock shaft is damaged - Install a new shaft |
| Damaged mechanical components of the hitch - Replace worn or damaged hitch parts |
| Hitch jerks when lift or lower |
| Aeration in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Dirty hydraulic fluid - The fluid must be changed |
| Hydraulic pump failure - Check pump performance and change it if necessary |
| Defective or incorrect setting hydraulic spool valve block - Adjust properly or change |
| Hydraulic cylinder is not working - Check cylinder components for wear or damage and change if necessary |
| Steering System Troubleshooting |
| Steering wheel is difficult to turn |
| Steering column is worn or improperly fitted - Refit properly or change the steering column |
| Air enters in steering system - Need to bleed air |
| Not adjusted toe-in - Adjust toe-in wheels properly |
| Tire pressure is low - Tires need to be inflated |
| Steering pump malfunction - Check the steering pump and replace if necessary |
| Faulty or worn power steering valve - Inspect and change as required |
| Damaged steering box parts - Replace defective parts of power steering box |
| Insufficient steering oil - Need to add steering oil |
| Oil leaks in the steering system - Retighten the connections of the hydraulic steering lines and hoses |
| Excessive play in steering |
| Steering column shaft or coupling has maximum wear - Replace faulty part |
| Damaged or worn power steering valve - Replace or repair steering valve as required |
| Worn steering box components - Defective power steering box components must be replaced |
| Steering pump not working - Check the steering pump and replace if necessary |
| Faulty or worn steering tie-rod ends or linkage - Change failed component |
| Tractor is pulling to right or left |
| Incorrect tire pressure - Inflate the tires correctly |
| Improper toe-in adjustment - Adjust toe-in properly |
| Worn or faulty steering tie-rod ends or linkage - Change damaged component |
| Worn steering box parts - Replace defective components of power steering box |
| Power steering valve is damaged or worn - Inspect and replace as required |
| Worn or incorrectly adjusted or worn front hub bearings - Change or adjust bearings correctly |
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| Farm Tractors Technical Specifications |
