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John Deere 2025R Troubleshooting

The John Deere 2025R is a four wheel drive compact utility tractor from 2R series. This model was manufactured between 2013 and 2021. The John Deere 2025R driveline includes a 77.2 cu.in (1.3L) Yanmar 3TNV80F 4-cycle vertical in-line 3-cylinder indirect injection naturally aspirated water-cooled diesel engine with a max power of 25 hp (18.6 kW), and 2-range hydrostatic transmission with infinite forward and reverse gears.

The engine has an in-line type fuel injection pump, forced lubrication with trochoid pump, liquid-cooled with radiator, and dry type air cleaner. Max forward speed - 12.3 mph (19.8 km/h), maximum reverse speed - 11.4 mph (18.2 km/h). The open center hydraulic system includes a gear pump with rated capacity of 3.4 gpm (13 lpm). The hydraulic system pressure is 167 bar (2420 psi). The John Deere 2025R is equipped with a hydrostatic power steering, wet disc brakes, 23x8.50-12 front tires, and 31x12.00-16.5 rear tires. The wheelbase is 63" (1600 mm).

The tractor is compatible with 54", 60", 62" mid-mount 3-blade AutoConnect mower decks with hydraulic lift system, 47" or 54" front-mount two-stage snowblowers, 54" or 60" front-mount blade, John Deere 120R front-end loader with lift capacity to full height of 754 lbs (342 kg), and John Deere 270B backhoe with maximum digging depth of 84" (2130 mm).

Engine Troubleshooting
Engine will not start or hard to start
Fuel filter is clogged - Replace filter element
No fuel injection - Open fuel cock to inject fuel
Air in fuel pipes - Bleed fuel pipes
Fuel injectors are damaged or dirty - Clean or replace fuel injectors
Faulty fuel injection pump - Repair or install new pump
Low compression - Check cylinder block and change faulty parts
Engine stops running unexpectedly
Engine has not warmed up to the recommended temperature - Normalize the engine temperature
Air in fuel system - Air-bleed fuel system
Uneven fuel injections - Repair or adjustment
Fuel filter clogging - Change the filter element
Fuel injectors are damaged or dirty - Check fuel injectors and replace if required
Engine starts and stalls immediately
Unadjusted fuel injection pump timing - Adjust the fuel injection pump timing correctly
Plugged fuel filter - Filter maintenance required
Fuel injector nozzles are defective or dirty - Service or replace injector nozzles
Fuel injection pump is faulty - Replace injection pump or repair it
Air cleaner element is dirty - Replace or service air cleaner element
Engine stalls when idle
Incorrect low idle speed adjustment - Adjust the low idle speed
Fuel injection pump malfunctioning - Change pump or rebuild it
Fuel injector nozzles are faulty - Change or clean injector nozzles
Valve clearance is wrong - Correct valve clearance needs to be set
Engine overheated
Insufficient coolant fluid - Fill the radiator to the required level. Check for leaks or other malfunctions
Cooling system components are failed or system is dirty - Service the cooling system or replace faulty components
Engine oil insufficient - Need to add engine oil
Worn fan belt or incorrect belt tension - Adjust correctly or replace the belt
Thermostat is defective - Install new thermostat
Engine lacks power
Fuel injectors are damaged or dirty - Clean or replace fuel injectors
Incorrect fuel injection pressure - Correct the pressure settings
Air filter element is clogged - Change or replace air filter element
Oil filter element is dirty - Service or replace engine oil filter
Engine is overloaded - Reduce the load or use a lower gear
The valve clearance is not adjusted - Need to adjust valve clearance
Low idle speed setting is not correct - Adjust the low idle speed
Fuel hoses or pipes clogging - Service fuel pipes and hoses
Engine compression too low: Intake or exhaust valves are damaged - Replace the valves as required
Engine noises or knocks
Fuel injection pump out of timing - Correct injection timing
Fuel injector nozzles are dirty or defective - Change or clean injector nozzles
Engine oil level low - Checking oil level and add if necessary
Engine is not warmed up to the required temperature - Engine is not warmed up to the required temperature
Main bearings or crankshaft wear - Replace crankshaft or bearings
Piston rings are defective or broken - Replace the piston rings as required
Loose flywheel bolts - Inspect flywheel bolts and tighten properly
Excessive engine oil consumption
Oil leaks: Gaskets or seals can be faulty - Worn parts need to be replaced
Wrong oil viscosity - Use oil of proper viscosity
Piston rings are stuck or broken - Change the piston rings as required
Valve stems or guides are damaged - Valves need to be changed
Pistons or cylinder liners are worn - Inspect liners and pistons, fit new parts as necessary

Electrical System Troubleshooting
Battery won’t charge
Dead cell in battery - Change the battery
Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair
Corroded or loose cables and terminals - Tighten or service cables and terminals
Improper belt tension adjustment or damaged belt - Adjust belt tension properly or replace belt
Starter turns slow
Low battery capacity - Battery needs to be recharged
Battery is draining quickly - Battery needs service or replacement
Bad battery cable harness - Inspect cables for malfunctions, repair or change
Loose or corroded terminals and cables - Tighten or clean terminals and cables
Starter motor won't turn
Low battery voltage - Battery is drained, recharge it
Drained or defective battery - Replace or charge as required
Defective starter motor - Starter should be changed
Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly

Hydrostatic Transmission Troubleshooting
HST transmission makes excessive noise
Transmission fluid level is insufficient or fluid is contaminated - Fill the transmission with fresh fluid or add fluid to the correct level
Speed control rod linkage is worn or not adjusted - Adjust or change rod linkage
Relief valve failure - Replace valve as required
Transmission is under excessive load - The load should be reduced
Transmission parts are worm or defective - Inspect internal transmission components and replace if necessary
Transmission oil over heats
Lack of transmission fluid supply - Fill up the transmission fluid
Transmission fluid filter is plugged - Replace or clean transmission fluid filter
Cooling components are plugged or defective - Inspect all cooling components and replace or repair if necessary
Transmission is under excessive load - Reduce loading
Power is insufficient
Oil level is insufficient - Fill up the transmission oil
Insufficient charge pressure - Test charge pressure
Worn or damaged relief valve - Replace valve as required
Transmission fluid leakage
Broken gaskets or seals - Replace worn gaskets or seal
High pressure inside the transmission case - Repair or replace worn parts
Plugged oil return tube - Clean or replace return tube

Hydraulics Troubleshooting
Hydraulic system is too hot
Improper pressure in hydraulic system - Adjust properly
Main relief valve is faulty or misadjusted - Adjust or change relief valve
Hydraulic fluid is contaminated - Fill up with new hydraulic fluid
Air in hydraulic system - Inspect the pump seals, suction line, and fittings
Insufficient hydraulic oil pressure
Hydraulic fluid level is insufficient - Check and refill the hydraulic fluid
Hydraulic fluid filter is dirty - Clean the hydraulic filter element or replace if necessary
Hydraulic pump malfunction - Check pump performance and change it if necessary
Hydraulic spool valve is defective or set improper - Adjust correctly or replace
Hydraulic cylinder is faulty - Check the hydraulic cylinder parts for damage or wear and replace if necessary
Hydraulic lines are leaking - Find leaks in hydraulic system and repair it
Hitch fails to lift or lifts slowly
Hydraulic oil level is insufficient - Fill up the hydraulic oil
Cold hydraulic fluid - Warm up the fluid
Dirty hydraulic oil filter - Change the hydraulic filter element or service if required
Defective hydraulic pump - Test the pump flow rate and change pump if required
Main relief valve is defective or unadjusted - Adjust relief valve or change if required
Hydraulic control valve is not set properly or defective - Replace or adjust properly
Hydraulic cylinder is broken - Check cylinder components for wear or damage and change if necessary
Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe
Hitch won't lower or lowers slowly
Faulty or incorrect setting hydraulic control valve - Adjust correctly or replace
Hydraulic cylinder failure - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Damaged hitch cross shaft - Change the shaft
Damaged mechanical components of the hitch - Change worn or defective hitch parts
3-point hitch lift or lower is jerky
Air enters in hydraulic system - Check the suction line, pump seals, and fittings
Dirty hydraulic oil - The oil must be changed
Hydraulic pump failure - Check pump capacity and change if necessary
Defective or incorrect setting hydraulic spool valve block - Adjust correctly or change
Hydraulic cylinder is faulty - Check the hydraulic cylinder parts for damage or wear and replace if necessary

Steering System Troubleshooting
Stiff steering
Steering column is worn or improperly fitted - Refit properly or change the steering column
Air enters in steering system - Need to bleed air
Incorrect toe-in adjustment - Check toe-in and correct
Front tires are worn out - Install new tires
Steering pump not working - Install a new hydraulic steering pump
Faulty or worn power steering control valve - Inspect and replace as required
Defective or stuck relief valve - Install a new relief valve or clean it
Lack of steering oil - Fill the steering system with oil
Oil leakage in the steering system - Tighten connections of hydraulic hoses and pipes in steering system
Excessive steering wheel free play
Steering column shaft or coupling is worn out - Replace defective part
Power steering control valve has wear or damage - Inspect and change as required
Faulty steering pump - Replace or repair steering pump
Faulty or worn steering tie-rod ends or linkage - Change damaged part
Tractor pulls to left or right
Improper tire pressure - Check the pressure and inflate tires as required
Incorrect toe-in adjustment - Check toe-in and correct
Steering tie-rod ends or linkage are defective - Replace damaged component
Worn or defective power steering control valve - Inspect and change as required
Defective steering cylinder - Change or repair steering cylinder
Improperly adjusted or worn front hub bearings - Adjust correctly or change bearings




Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294