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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 |
