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Home / Farm Tractors / John Deere Tractors / JD 2450

John Deere 2450 Troubleshooting

The John Deere 2450 is a 2WD/4WD farm utility tractor. This model was manufactured between 1987 and 1994. The tractor is powered by JD 4239-DL 4 stroke four-cylinder direct injection liquid-cooled diesel engine with a rated power of 70.0 hp (52.3 kw) and 189 lb-ft (255 Nm) of peak torque at 1500 rpm.

The John Deere 2450 tractor is fitted with 2 types of transmission. 1st type: 16x8 two-speed powershift transmission. 2nd type: partially synchronized transmission with 8 forward and 4 reverse gears. Max. forward speed - 18.6 mph (29.9 kph), maximum reverse speed - 8.1 mph (13.0 kph).

The closed center constant pressure hydraulic system used a piston pump with a rated capacity of 11.6 gpm (44 lpm). The hydraulic pressure is 190 bar (2755 psi). The 4-wheel drive models are equipped with 11.2x28 front tires and 13.6x38 rear tires. The 7.5x18 front tires and 13.6x38 rear tires are used for tractors with 2-wheel drive. The wheelbase is 89.2" (2260 mm) for 2WD models and 90" (2280 mm) for 4WD models.

Engine Troubleshooting
Engine doesn't start or starts hard
Fuel filter is dirty - Clean or change the filter
Closed fuel supply valve - Open supply valve to inject fuel
There is air in the fuel system - Bleed the system
Clogged fuel injectors - Check fuel injectors and replace if required
Fuel injection pump failure - Change pump or rebuild it
Engine has low compression - Inspect cylinder block and change worn parts
Engine stops during operation
Low coolant temperature - Warm up engine as required
Fuel-line is leaking air - Retighten clamps, replace defective pipes
Fuel injection failed - Use correct settings
Fuel filter is dirty - Clean or change the filter
Clogged or damaged injectors - Check fuel injectors and replace if required
Diesel starts and stalls suddenly
Fuel injection pump timing is incorrect - Fuel injection pump timing adjustment needs to be corrected
Fuel filter is dirty - Clean or replace the filter
Fuel injector nozzles are damaged or dirty - Install new set of properly balanced nozzles
Fuel injection pump damage - Repair or change injection pump
Air cleaner element is clogged - Service or change air cleaner
Engine stalls at idle
Low idle speed set incorrectly - Adjust the low idle speed
Fuel injection pump damage - Replace or repair injection pump
Damaged or clogged injector nozzles - Test injector nozzles and replace as required
The valve clearance is incorrect - Adjustment procedure required
Engine overheated
Lack of engine coolant - Refill to the correct level. Check radiator and hoses for leaks
Cooling system is dirty or cooling components are damaged - Service the cooling system or replace faulty components
Engine oil level is low - Add oil to the engine crankcase
Fan belt is broken or belt tension is unadjusted - Change or adjust belt tension correctly
Defective or wrong type of thermostat - Replace the thermostat
Diesel engine loses power
Dirty or faulty injectors - Inspect fuel injectors and replace if necessary
Incorrect fuel injection pressure - Adjust pressure to proper level
Air filter is dirty - Change or replace air filter element
Oil filter element clogged - Service or replace engine oil filter
Engine is overloaded - Reduce engine load
The valve clearance is incorrect - Check and adjust as required
Improperly adjusted low idle speed - Test and adjust
Fuel hoses or pipes clogging - Service fuel hoses and pipes
Engine lost compression: Valves are broken or leaking - Replace the valves
Engine knocks or noises
Incorrectly set fuel injection pump timing - Check and correct adjustments
Fuel injector nozzles are damaged - Inspect injector nozzles and change if required
Low engine oil level - Checking oil level and add if necessary
Engine is not preheated - Warm up engine as required
Main bearings or crankshaft are worn out - Crankshaft or bearings need to be replaced
Broken or worn piston rings - Install new piston rings
Loose flywheel screws - Inspect the flywheel screws and tighten securely
High engine oil consumption
Oil leaking: Seals or gaskets are wearing excessively - To repair leaks, replace worn parts
Crankcase oil too light - Fill up with the correct oil viscosity
Stuck or defective piston rings - Change the piston rings as required
Valve guides or stems are damaged - Install new valves
Scuffed pistons or cylinder liners - Check pistons and liners, change as required

Electrical System Troubleshooting
Battery won’t charge
Battery faulty cell - Replace the battery
Bad battery cable harness - Inspect cables for malfunctions, repair or change
Loose or corroded terminals and cables - Terminals and cables need to be tightened or cleaned
Damaged belt or incorrectly adjusted belt tension - Change belt or adjust belt tension properly
Starter cranks slowly
Low battery output - Low battery charging, charge as required
Battery won’t hold charge - Battery needs to be serviced or replaced
Bad battery cable harness - Inspect cables for malfunctions, repair or change
Loose or corroded cables and terminals - Service or tighten battery terminals and cables
Starter doesn't crank
Battery power is low - Charge the battery
Drained or defective battery - Recharge or change battery
Starter motor failing - Repair or change starter
Cables harness is improperly connected or disconnected - Inspect cables harness and reconnect it properly

Transmission Troubleshooting
Gear shift is hard
Failure or improper clutch adjustment - Replace or adjust clutch
Gear shift linkage is stuck or worn - Service or change the shift linkage
Bent or worn shift forks - Replace the shift forks
Defective gearshift mechanism - Replace defective components
Low transmission pressure
Oil level is low - Check transmission oil level and add oil as required
Transmission fluid filter is dirty (if equipped) - Change or service the transmission fluid filter
Relief valve is faulty - Change relief valve
Transmission noises
Damaged or worn bearings - Change the bearings
Insufficient oil supply - Add transmission oil as required
Transmission fluid contamination - Change transmission fluid
Improper backlash or damaged gears - Replace gears or set backlash properly
Damaged or worn shift forks - Shift forks need to be changed
Transmission fluid leaks
Gaskets or seals are damaged - Install new components
Transmission case is cracked - Replace case or transmission assembly

Hydraulics Troubleshooting
Excessive hydraulic system heat
Incorrect hydraulic pressure adjustments - Adjust correctly
Main relief valve incorrect adjustment or failure - Adjust relief valve or change if required
Hydraulic fluid is dirty - Hydraulic fluid change required
Air in hydraulic system - Inspect the pump seals, suction line, and fittings
Low hydraulic oil pressure
Hydraulic fluid level is insufficient - Need to add fluid
Hydraulic oil filter is dirty - Change hydraulic filter element or clean if necessary
Hydraulic pump failure - Check hydraulic pump flow and replace pump if necessary
Damaged or incorrect adjusted hydraulic control valve - Adjust properly or change
Faulty hydraulic cylinder - Check cylinder components for wear or damage and change if necessary
Hydraulic pipes are leaking - Find leaks in the system and fix it
3-point hitch does not raise or raises very slowly
Lack of hydraulic oil - Add oil to the hydraulic system
Cold fluid in hydraulic system - Wait for fluid to warm up
Hydraulic oil filter element clogging - Clean or change hydraulic filter
Hydraulic pump malfunction - Test the pump flow rate and install new pump if required
Main relief valve is faulty or misadjusted - Adjust the valve or replace if necessary
Faulty or incorrect setting hydraulic control valve - Change or adjust properly
Hydraulic cylinder is defective - Check cylinder components for damage or wear and change if necessary
Broken or loose suction line - Retighten or change
Three-point hitch dropping is too slow or cannot be dropped
Hydraulic control valve block is faulty or out of adjustment - Adjust properly or change
Defective hydraulic cylinder - Check cylinder components for damage or wear and change if necessary
Worn lift arm shaft - Replace the shaft
Hitch has mechanical defects - Replace worn or defective hitch parts
Hitch jerks when lift or lower
Hydraulic system sucks air - Inspect the suction line, pump seals, and fittings
Contaminated hydraulic fluid - Change hydraulic fluid
Faulty hydraulic oil pump - Check pump capacity and change if necessary
Defective or not adjusted hydraulic spool valve - Replace or adjust properly
Hydraulic cylinder is broken - Check cylinder components for wear or damage and change if necessary

Steering System Troubleshooting
Steering is stiff
Steering column is worn or improperly fitted - Refit properly or change the steering column
Air leaks in steering system - Bleed air from system
Steering filter is clogged - Change steering filter element
Improper toe-in adjustment - Adjust toe-in properly
Tires are incorrectly inflated - Inflate as required
Hydraulic steering pump is defective - Check the steering pump and replace if necessary
Power steering valve is worn or defective - Check and replace as required
Hydrostatic steering unit is worn or defective - Check and replace as required
Damaged steering box parts - Defective power steering box components must be replaced
Insufficient steering fluid - Fill up the steering fluid
Oil leakage in the steering system - Tighten connections of hydraulic hoses and pipes in steering system
Excessive play in steering
Worn steering column coupling or shaft - Replace faulty part
Worn or defective hydrostatic steering unit - Inspect and replace as required
Power steering valve is worn or defective - Check and replace as required
Worn steering box parts - Repair power steering box
Steering pump is faulty - Steering pump needs to be replaced or repaired
Steering tie-rod ends or linkage are defective - Change failed part
Front wheels wander to right or left
Tires are improperly inflated - Inflate as necessary
Toe-in adjustment is incorrect - Adjust toe-in wheels properly
Steering linkage or tie-rod ends are defective - Replace damaged component
Faulty steering box parts - Defective power steering box components must be replaced
Power steering valve is worn or defective - Check and replace as required
Hydrostatic steering unit is worn or defective - Repair or change the steering unit
Defective steering cylinder - Change or repair hydraulic steering cylinder
Damaged or improperly adjusted or worn front hub bearings - Replace or adjust the bearings correctly

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