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John Deere 2720 Troubleshooting

The John Deere 2720 is a 4-wheel drive compact utility tractor. This model was manufactured between 2008 and 2012. The components of John Deere 2720 driveline system: Yanmar 3TNV88 4-cycle three-cylinder direct injection liquid-cooled diesel engine and two-range hydrostatic transmission with infinite forward and reverse gears.

A 100.2 cubic inches (1.6L) engine has a cylinder bore of 3.47" (88 mm), piston stroke of 3.54" (90 mm), and maximum power of 31.4 hp (23.4 kW). Max forward speed - 4.7 mph (7.6 km/h) using low range or 13.5 mph (21.7 km/h) using high range, max reverse speed - 4.7 mph (7.6 km/h) using low range or 13.2 mph (21.2 km/h) using high range. The open center hydraulic system used a gear pump with a flow rate of 5 gal/min (19 l/min). The hydraulic system pressure is 167 bar (2420 psi).

The John Deere 2720 is equipped with a power steering system, wet disc brakes, 23x8.50-12 (Turf) or 23x8.50-14 (Industrial) front tires, and 36x14.00-15 (Turf) or 14-17.5 (Industrial) rear tires. The wheelbase is 65.2" (1650 mm). The tractor is compatible with a 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), and John Deere 46 backhoe with 2-ft flat digging depth of 78" (1980 mm).

Engine Troubleshooting
Engine doesn't start or starts hard
Fuel filter plugging - Clean or change the filter
No fuel supply from the tank - Open the fuel supply valve
Air in fuel system - Air-bleed fuel system
Fuel injectors are damaged or dirty - Change fuel injectors
Fuel injection pump malfunction - Replace or rebuild injection pump
Engine has low compression - Inspect cylinder block and change defective components
Engine shuts off while driving
Engine is not fully warmed up - Warm up the engine
Fuel lines leaking air - Tighten clamps, change faulty pipes
Irregular fuel injection - Adjust fuel injection timing
Fuel filter clogging - Change filter element
Fuel injectors are defective or dirty - Test fuel injectors and change if necessary
Engine starts but immediately shuts off
Fuel injection pump timing is incorrect - Check and correct settings
Dirty fuel filter element - Change the filter element
Clogged or damaged injector nozzles - Install new set of properly balanced nozzles
Damaged fuel injection pump - Repair or install a new fuel pump
Air cleaner is clogged - Replace cleaner or install new cleaner element
Engine stalling at idle
Low idle speed set incorrectly - Adjust as required
Fuel injection pump is not operating properly - Change or repair the pump
Fuel injector nozzles fault - Service or replace injector nozzles
The valve clearance is not adjusted - Adjust valve clearance
Engine overheated
Lack of engine coolant - Top up coolant. Check system for leaks
Cooling system parts are defective or system is dirty - Change faulty components or service cooling system
Insufficient engine oil - Fill up the engine oil
Fan belt tension is improper or belt is damaged - Adjust belt tension properly or change it
Thermostat fault - Check and replace if required
Low engine power
Clogged or damaged injectors - Test fuel injectors and change if necessary
Incorrect fuel injection pressure - Adjust to correct pressure
Air filter is clogged - Service or change air filter
Oil filter element clogging - Change or clean engine oil filter element
Engine is running overloaded - Reduce the load or use a lower gear
Improper valve clearance - Adjust valve clearance according to specifications
Wrong adjustment of low idle speed - Adjust as required
Clogged fuel pipes or hoses - Service fuel hoses and pipes
Engine lost compression: Leaking or broken valves - Valves need to be replaced
Abnormal engine knocking or noise
Fuel injection pump timing is incorrect - Check the fuel injection pump timing setting
Dirty or defective injector nozzles - Replace fuel injector nozzles
Insufficient engine oil - Check and refill engine oil
Engine is not preheated - Warm up to required temperature
Crankshaft or main bearings failure - Worn parts replacement required
Defective or broken piston rings - Replace piston rings
Flywheel bolts are loose - Bolts need to be tightened
Engine using too much oil
Oil leaks: Worn gaskets or seals - Replace worn parts to avoid leaks
Incorrect oil viscosity - Use oil of correct viscosity
Piston rings are defective or worn - Have piston rings replaced
Damaged valve guides or valve stems - Replace defective valves
Cylinder liners or pistons are scuffed - Check pistons and liners, replace as required

Electrical System Troubleshooting
Battery won’t charge
Battery failing - Battery change required
Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair
Battery cables and terminals are corroded or loose - Service or tighten battery cables and terminals
Belt damage or incorrect belt tension adjustment - Replace belt or properly adjust belt tension
Starter cranks slow
Low battery power - Charge the battery
Battery discharges quickly - Service battery or change it
Bad battery cable harness - Inspect cables for malfunctions, repair or change
Loose or corroded battery cables and terminals - Tighten or service terminals and cables
Starter motor is not working
Low battery output - Battery needs to be recharged
Drained or defective battery - Charge or change the battery
Damaged starter motor - Repair or replace starter
Disconnected or incorrectly connected cables - Inspect battery cables and connect correctly

Hydrostatic Transmission Troubleshooting
HST transmission noises
Contaminated oil or low oil level - Top up to proper level or change oil
Speed control rod linkage is damaged or unadjusted - Change or adjust rod linkage
Relief valve is defective - Install a new valve
Transmission overloaded - Load needs to be reduced
Transmission components are worn or damaged - Change or repair damaged parts
Transmission fluid over heats
Insufficient oil supply - Correct the transmission oil level
Transmission fluid filter element is dirty - Clean or replace the transmission fluid filter
Cooling components are clogged or damaged - Check all cooling components and repair or change if required
Excessive transmission load - Reduce transmission load
Lack of power
Insufficient fluid supply - Fill the transmission housing with fluid
Insufficient charge pressure - Test charge pressure
Relief valve is worn or damaged - Replace valve as required
Transmission oil leaks
Gaskets or seals are damaged - Change defective seal or gaskets
High pressure inside the transmission housing - Replace or repair defective components
Oil return tube is clogged - Inspect tube and service if required

Hydraulics Troubleshooting
Excessive hydraulic system heat
Hydraulic system pressure is unadjusted - Adjust the pressure as required
Main relief valve incorrect adjustment or failure - Set up or change the relief valve
Contaminated hydraulic fluid - Change hydraulic fluid
Air enters in hydraulic system - Check the pump seals, suction line, and fittings
Hydraulic oil pressure is low
Hydraulic fluid level is insufficient - Add fluid to the hydraulic system
Hydraulic oil filter is dirty - Change the hydraulic filter element or service if required
Hydraulic pump malfunction - Check pump flow and change pump if necessary
Faulty or incorrect setting hydraulic spool valve - Set correctly or replace
Hydraulic cylinder is not working - Check cylinder parts for wear or damage and replace if necessary
Hydraulic piping leaks - Identify leaks in the system and repair it
3-point hitch lifts slowly or won't lift
Not enough hydraulic fluid in the system - Need to add fluid
Cold oil in hydraulic system - Wait for oil to warm up
Hydraulic oil filter element clogging - Change the hydraulic filter element or service if required
Defective hydraulic pump - Test pump flow rate and replace pump if required
Faulty or incorrectly adjusted main relief valve - Adjust or replace the relief valve
Hydraulic spool valve block is faulty or out of adjustment - Adjust correctly or change
Faulty hydraulic cylinder - Inspect cylinder components for wear or damage and change if required
Suction pipe is broken or loose - Tighten the pipe or replace it
3-point hitch drops slowly or won't drop
Hydraulic spool valve block is not set properly or defective - Set properly or replace
Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required
Hitch rock shaft is worn Replace the shaft
Internal mechanical malfunction with hitch - Replace faulty or worn hitch components
Hitch is lowered or raised jerkily
Air enters in hydraulic system - Check the suction pipe, fittings, and pump seals
Dirty hydraulic oil - The oil must be changed
Hydraulic pump is faulty - Check the pump performance and replace it if required
Damaged or incorrect adjusted hydraulic control valve - Replace or adjust correctly
Broken hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary

Steering System Troubleshooting
Steering wheel is difficult to turn
Defective or improperly assembled steering column - Reassemble properly or change steering column
Air in steering system - Bleed the system of air
Incorrect toe-in - Check and adjust toe-in
Tires are not correctly inflated - Inflate tires as necessary
Steering pump not working - Check the hydraulic steering pump and change if necessary
Worn or defective power steering control valve - Inspect and change as required
Relief valve is seized or defective - Replace or install new relief valve
Not enough steering oil - Check oil level and add steering oil as required
Oil leakage in the steering system - Retighten steering pipe and hose connections
Excessive steering wheel play
Worn steering column coupling or shaft - Change defective component
Damaged or worn power steering control valve - Check and replace as required
Damaged hydraulic steering pump - Check the hydraulic steering pump and change if necessary
Steering linkage or tie-rod ends are worn - Replace damaged part
Tractor pulls to left or right
Incorrect tire pressure - Inflate the tires correctly
Incorrect toe-in adjustment - Check and adjust toe-in
Worn or faulty steering tie-rod ends or linkage - Replace failed part
Power steering control valve is worn or defective - Replace or repair steering control valve as required
Steering cylinder is defective - Repair or replace steering cylinder
Front hub bearings are damaged or incorrectly adjusted - Adjust properly or replace 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