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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 |
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 |
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 |
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 |
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 |
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 |
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 |
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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Farm Tractors Technical Specifications |