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Home / Farm Tractors / John Deere Tractors / JD 2305

John Deere 2305 Troubleshooting

The John Deere 2305 is a 4-wheel drive sub-compact utility tractor from 2000 Twenty series. This model was manufactured between 2005 and 2010. The John Deere 2305 powertrain system components: a 68.1 cu.in (1.1L) Yanmar 3TNV76 four-cycle three-cylinder indirect injection naturally aspirated liquid-cooled diesel engine with a maximum power of 24.1 hp (18 kW), and 2-range hydrostatic transmission with infinite forward and reverse gears.

The engine has a mechanical fuel injection pump, forced lubrication with trochoid pump, oil filter with single element, air cleaner with dual dry element. The maximum forward speed - 8.3 mph (13.4 km/h), maximum reverse speed - 8 mph (12.8 km/h). The open center hydraulic system includes a gear pump with a rated capacity of 2.9 gal/min (11 l/min). The hydraulic pressure is 137 bar (1990 psi). The John Deere 2305 is equipped with a power steering system, wet disc brakes, 18x8.50-10 front tires, and 26x12.00-12 rear tires. The wheelbase is 57.1" (1450 mm).

Compatible attachments for the John Deere 2305 tractor: 54", 62" mid-mount 3-blade mower decks with cutting height of 1.0-5.0" (25-127 mm) and hydraulic lift system, or John Deere 200CX front-end loader with lift capacity to full height of 902 lbs (409 kg) and breakout force of 2239 lbs (1015 kg).

Engine Troubleshooting
Diesel will not start or hard to start
Clogged fuel filter element - Change filter element
Fuel is not supplied from the tank to the system - Check the fuel shut-off valve
Air in fuel pipes - Bleed fuel pipes
Dirty or damaged injectors - Inspect fuel injectors and replace if necessary
Fuel injection pump is defective - Rebuild or install a new injection pump
Bad compression - Check cylinder block and replace damaged components
Diesel stalls while running
Engine is not fully warmed up - Warm up to required temperature
There is air in the fuel system - Bleed the system
Irregular fuel injection - Adjust fuel injection timing
Fuel filter plugging - Clean or change the filter
Dirty or faulty injectors - Check fuel injectors and replace if required
Diesel starts and immediately shuts off
Timing of fuel injection pump is not adjusted - Correct injection timing
Fuel filter is clogged - Change filter element
Dirty or defective injector nozzles - Test injector nozzles and replace as required
Fuel injection pump is defective - Rebuild or replace pump
Clogged air cleaner element - Air cleaner maintenance required
Engine stops while idle
Too low idle RPM - Need to adjust idle speed
Fuel injection pump failure - Install a new fuel pump or repair
Dirty or defective injector nozzles - Install a new set of well-balanced nozzles
Valve out of adjustment - Correct valve clearance needs to be set
Engine is overheated
Engine coolant is insufficient - Fill the radiator to the required level. Check for leaks or other malfunctions
Cooling system parts are failed or system is clogged - Flush cooling system or replace faulty parts
Engine oil level is low - Add oil to the engine crankcase
Damaged fan belt or incorrect belt tension - Adjust correctly or change the belt
Defective thermostat - Test thermostat opening temperature, replace as required
Reduced engine power
Fuel injectors are damaged or dirty - Inspect fuel injectors and replace if necessary
Fuel injection pressure is incorrect - Test fuel injection pressure and adjust it correctly
Air filter clogging - Service or replace the air filter
Dirty oil filter element - Change or service engine oil filter
Engine overloaded - Reduce engine load
Incorrect valve clearance - Check and adjust
Incorrectly adjusted low idle speed - Adjust low idling as recommended
Dirty fuel pipes or hoses - Clean fuel hoses and pipes
Low engine compression: Valves are broken or leaking - Replace the valves
Engine noise or knocking
Fuel injection pump out of timing - Adjust the fuel injection pump timing correctly
Damaged or clogged injector nozzles - Test injector nozzles and replace as required
Low engine oil level - Add oil to the engine crankcase
Engine is not warmed up to the required temperature - Warm up to required temperature
Main bearings or crankshaft wear - Need to install new components
Damaged or defective piston rings - Have piston rings replaced
Flywheel mounting screws are loose - Tighten the screws
Excessive engine oil consumption
External oil leaks: Gaskets or seals are excessively worn - Replace defective parts
Wrong oil viscosity - Use oil of correct viscosity
Damaged or seized piston rings - Replace piston rings
Valve guides and stems are worn - Valves replacement required
Cylinder liners or pistons are worn - Check pistons and liners, change as required


Electrical System Troubleshooting
Battery cannot be charged
Defective battery - Install a new battery
Damaged battery cable harness - Check electrical cables for damage, repair or replace
Corroded or loose battery cables and terminals - Tighten or service cables and terminals
Incorrect belt tension adjustment or worn belt - Replace belt or adjust belt tension correctly
Starter cranks slowly
Low battery voltage - Charge the battery
Battery will not hold charge - Service or replace the battery
Battery electrical wire harness damage - Check battery wires for damage, replace or change
Corroded or loose terminals and cables - Tighten or clean terminals and cables
Starter motor is not working
Low battery voltage - Battery is drained, recharge it
Discharged or faulty battery - Replace or charge as required
Faulty starter motor - Starter needs to be changed
Disconnected or incorrectly connected cables - Need to reconnect cables correctly

Hydrostatic Transmission Troubleshooting
HST transmission makes excessive noise
Insufficient transmission fluid level or contaminated fluid - Add the fluid to proper level or pour fresh fluid
Defective or out of adjustment speed control rod linkage - Adjust or repair rod linkage
Damaged relief valve - Change relief valve
Excessive transmission load - Load needs to be reduced
Transmission components are worn or damaged - Inspect transmission components and replace if necessary
Transmission fluid is too hot
Lack of transmission fluid supply - Check transmission fluid level and add it as required
Transmission oil filter element is dirty - Change or clean the transmission oil filter
Cooling components are clogged or damaged - Inspect all cooling components and service or replace if necessary
Transmission overload - The load should be reduced
Lack of power
Oil level is low - Add transmission oil as required
Charge pressure is insufficient - Check charge pressure
Relief valve is worn or defective - Install a new relief valve
Transmission fluid leaks
Gaskets or seals are defective Change defective gaskets or seal
Internal transmission case pressure is too high - Change or repair damaged parts
Clogged transmission fluid drain line - Service or replace drain line


Hydraulics Troubleshooting
Hydraulic system is overheated
Hydraulic system pressure is not adjusted correctly - Correct adjustment is required
Defective or misadjusted main relief valve - Set up or change the relief valve
Hydraulic oil is dirty - Hydraulic oil change required
Hydraulic system sucks air - Inspect the suction line, pump seals, and fittings
Insufficient hydraulic fluid pressure
Not enough hydraulic fluid in the system - Fill the hydraulic system with oil
Hydraulic oil filter element is dirty - Replace hydraulic filter element or service if necessary
Damaged hydraulic oil pump - Check pump performance and change it if necessary
Hydraulic spool valve block is faulty or out of adjustment - Change or adjust properly
Broken hydraulic cylinder - Check cylinder components for wear or damage and change if necessary
Hydraulic lines are leaking - Detect leaks in the system and fix it
Hitch cannot be raised or raising is too slowly
Hydraulic oil level is insufficient - Fill the hydraulic system with oil
Hydraulic oil is too cold - Allow oil to warm
Hydraulic fluid filter clogging - Clean the hydraulic filter element or replace if necessary
Hydraulic pump is faulty - Check pump capacity and change if necessary
Main relief valve malfunction or incorrect adjustment - Set up or change the relief valve
Hydraulic spool valve block is not set properly or defective - Change or set correctly
Hydraulic cylinder is not working - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Broken or disconnected suction line - Connect or replace
Hitch not dropping or hitch drops slowly
Hydraulic control valve is not set properly or defective - Replace or adjust correctly
Broken hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Hitch rock shaft is worn Install a new shaft
Mechanical components of the hitch are defective - Replace damaged or worn hitch components
Hitch raises or lowers not smoothly
Hydraulic system sucks air - Inspect the pump seals, suction pipe, and fittings
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil
Defective hydraulic pump - Test the pump performance and change pump if required
Hydraulic spool valve is faulty or out of adjustment - Adjust correctly or replace
Hydraulic cylinder failure - Check cylinder components for wear or damage and change if necessary

Steering System Troubleshooting
Steering wheel is hard to turn
Steering column is damaged or improperly mounted - Replace the steering column or mount it properly
Air in steering system - Bleed air
Incorrect toe-in adjustment - Adjust toe-in properly
Tires are deflated - Need to inflate tires
Defective hydraulic steering pump - Install a new steering pump
Power steering control valve is defective or worn - Repair or replace the steering valve
Stuck or faulty relief valve - Replace or service relief valve
Lack of steering fluid - Need to add steering oil
Oil leakage in the steering system - Tighten the steering line and hose joints
Excessive play in steering
Steering column shaft or coupling has maximum wear - Replace defective part
Power steering control valve has wear or damage - Change or repair steering control valve if required
Worn steering pump - Steering pump needs to be repaired or replaced
Steering tie-rod ends or linkage are worn - Change damaged part
Tractor pulls to right or left
Tires are improperly inflated - Inflate as necessary
Improper toe-in adjustment - Adjust toe-in correctly
Faulty or worn steering tie-rod ends or linkage - Change failed part
Power steering control valve is worn or defective - Change or repair steering valve if required
Steering cylinder is damaged - Change or repair steering cylinder
Incorrectly adjusted or damaged front hub bearings - Change or adjust the bearings properly

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