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John Deere 2520 Troubleshooting
The
John Deere 2520 is a 4WD (4x4) compact utility tractor from 2000 Twenty series.
This model was manufactured between 2006 and 2012. The John Deere 2520 driveline
system components: a 81.2 cu.in (1.3 L) Yanmar 3TNV82A 4-cycle vertical in-line
3-cylinder direct injection naturally aspirated liquid-cooled diesel engine with
a maximum power of 26.4 hp (19.7 kW), and two-range hydrostatic transmission
with infinite forward and reverse gears.
Max forward speed - 13.4 mph (21.5 km/h), maximum reverse speed - 13 mph
(20.9 km/h). The open center hydraulic system includes a gear pump with
rated fluid flow of 5 gal/min (19 l/min). The hydraulic pressure is 167
bar (2420 psi). The tractor is equipped with a power steering system,
wet disc brakes, 24x8.5-14 (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 John Deere 2520 is compatible with the following attachments: 62" or
72" mid-mount 3-blade mower decks with cutting height of 1.0-6.0"
(25-152 mm) and hydraulic lift system, John Deere 200CX front-end loader
with lift capacity to full height of 902 lbs (409 kg), and John Deere 46
backhoe with 2-ft flat digging depth of 78" (1980 mm).
| Engine Troubleshooting |
| Engine hard starting or not starting |
| Dirty fuel filter element - Change the filter element |
| Fuel is not supplied from the tank to the system - Check the fuel shut-off valve |
| There is air in the fuel system - Bleed the system |
| Fuel injectors are defective or dirty - Clean or replace fuel injectors |
| Fuel injection pump failure - Repair or replace injection pump |
| Poor cylinder compression - Check and change damaged parts |
| Engine stops running while driving |
| Engine is cold - Warm up the engine |
| Air in fuel system - Air-bleed fuel system |
| Improper fuel injection - Fuel injection settings required |
| Dirty fuel filter element - Clean or replace the filter |
| Clogged fuel injectors - Service or change fuel injectors |
| Engine starts but immediately stops |
| Unadjusted fuel injection pump timing - Repair or replace fuel injection pump |
| Fuel filter is dirty - Replace filter element |
| Fuel injector nozzles are damaged - Change injector nozzles |
| Fuel injection pump is broken - Install a new pump or rebuild |
| Dirty air cleaner - Service or change air cleaner |
| Engine stops at low idle speed |
| Low idle speed adjustment is incorrect - Adjustment required |
| Fuel injection pump is not working correctly - Replace or repair injection pump |
| Fuel injector nozzles are dirty - Replace fuel injector nozzles |
| Valve clearance is not correct - Correct valve clearance |
| Low coolant level - Fill the cooling system. If there are leaks in the system, replace worn components |
| Cooling system is dirty or cooling components are damaged - Service the cooling system or change faulty parts |
| Engine oil level is insufficient - Checking oil level and add if necessary |
| Worn fan belt or unadjusted belt tension - Replace or adjust belt tension properly |
| Defective or wrong type of thermostat - Replace the thermostat |
| Engine power is insufficient |
| Dirty or damaged injectors - Change fuel injectors |
| Insufficient fuel injection pressure - Adjust pressure to proper level |
| Air filter is dirty - Change or service air filter element |
| Engine oil filter is plugged - Clean or change engine oil filter |
| Engine is overloaded - Load reducing is recommended |
| The valve clearance is incorrect - Correct valve clearance needs to be set |
| Incorrect low idle setting - Adjust the low idle speed |
| Dirt in the hoses or pipes - Fuel hoses and pipes must be clean |
| Engine compression too low: Valves are defective or worn - Replace the valves as required |
| Incorrect setting of fuel injection pump timing - Fuel pump timing settings need to be corrected |
| Fuel injector nozzles are clogged or faulty - Install a new set of well-balanced nozzles |
| Engine oil level is low - Fill the crankcase with engine oil |
| Low coolant temperature - Warm up engine as required |
| Crankshaft or main bearings are worn out - Change defective components as required |
| Piston rings are defective or broken - Piston rings need to be replaced |
| Loose flywheel bolts - Inspect flywheel bolts and tighten properly |
| Engine oil consumption is too high |
| Oil leakage: Damaged gaskets or seals - Worn parts need to be replaced |
| Oil viscosity is wrong - Use oil of proper viscosity |
| Piston rings are seized or worn - Change piston rings |
| Valve stems and guides are worn - Need to replace the valves |
| Damaged cylinder liners or pistons - Inspect pistons and liners, replace as required |
| Electrical System Troubleshooting |
| Battery is not charging |
| Battery dead cell - Replace the battery |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Loose or corroded battery terminals and cables - Terminals and cables need to be tightened or cleaned |
| Defective belt or improperly adjusted belt tension - Change belt or adjust belt tension properly |
| Battery power is low - Battery is drained, recharge it |
| Battery is draining quickly - Service or change the battery |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Battery terminals and cables are corroded or loose - Service or tighten battery cables and terminals |
| Low battery capacity - Recharge the battery |
| Discharged or worn battery - Battery needs to be recharged or replaced |
| Starter motor is defective - Starter should be changed |
| Wiring harness is disconnected or improperly connected - Check wiring harness and reconnect properly |
| Hydrostatic Transmission Troubleshooting |
| HST transmission noise |
| Transmission fluid level is insufficient or fluid is contaminated - Change fluid or top up to proper level |
| Worn or misadjusted speed control rod linkage - Replace rod linkage or adjust correctly |
| Relief valve failure - Change relief valve |
| Transmission overload - Reduce the load is required |
| Worn or damaged transmission components - Replace or repair worn components |
| Transmission fluid overheats |
| Insufficient fluid supply - Fill up the transmission fluid |
| Transmission oil filter is plugged - Replace or service transmission oil filter |
| Defective or plugged cooling components - Inspect all cooling components and replace or repair if necessary |
| Transmission overloaded - Reduce transmission load |
| Low transmission oil level - Checking transmission oil level and add if necessary |
| Insufficient charge pressure - Check charge pressure |
| Relief valve is defective or worn - Install a new relief valve |
| Transmission fluid leakage |
| Seals or gaskets are damaged - Install new components |
| Internal transmission case pressure is too high - Inspect transmission components and replace if necessary |
| Clogged oil return tube - Service or replace return tube |
| Hydraulics Troubleshooting |
| Hydraulic system overheats |
| The system pressure has not been corrected - Make the correct settings |
| Faulty or incorrectly adjusted main relief valve - Adjust the valve or replace if necessary |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Air leaks in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Insufficient hydraulic oil pressure |
| Lack of hydraulic oil - Add oil to the hydraulic system |
| Hydraulic oil filter element clogging - Change hydraulic filter element or clean if necessary |
| Hydraulic pump is faulty - Check pump flow and install new pump if necessary |
| Defective or incorrect setting hydraulic control valve block - Replace or set properly |
| Hydraulic cylinder is defective - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Leakage in hydraulic lines - Find leaks in the system and fix it |
| 3-point hitch does not raise or raises very slowly |
| Not enough hydraulic oil in the system - Check oil level and add hydraulic oil as required |
| Cold fluid in hydraulic system - Wait for fluid to warm up |
| Hydraulic oil filter is dirty - Replace filter element or clean if required |
| Damaged hydraulic oil pump - Test the pump performance and change pump if required |
| Defective or misadjusted main relief valve - Set up or change the relief valve |
| Hydraulic control valve block is defective or set improper - Adjust properly or replace |
| Hydraulic cylinder malfunction - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe |
| Hitch won't lower or lowers slowly |
| Hydraulic spool valve is faulty or out of adjustment - Change or set correctly |
| Defective hydraulic cylinder - Inspect cylinder components for damage or wear and change if required |
| Worn hitch cross shaft - Change the shaft |
| Mechanical parts of the hitch are damaged - Replace damaged or worn hitch parts |
| Hitch jerks when lift or lower |
| Hydraulic system sucks air - Inspect the pump seals, suction pipe, and fittings |
| Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
| Hydraulic pump malfunction - Check pump capacity and change if necessary |
| Defective or incorrect setting hydraulic spool valve block - Replace or set properly |
| Hydraulic cylinder is faulty - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Steering System Troubleshooting |
| Excessive effort to steer |
| Damaged or improperly installed steering column - Reinstall or replace the steering column |
| Air trapped in the steering system - Air-bleed steering system |
| Improper toe-in - Check toe-in and correct |
| Tire pressure is low - Tires need to be inflated |
| Damaged hydraulic steering pump - Repair or replace steering pump |
| Damaged or worn power steering control valve - Check and replace as required |
| Relief valve is seized or faulty - Inspect relief valve and replace if necessary |
| Insufficient steering fluid - Fill up the steering fluid |
| Steering system oil leakage - Tighten joints of hydraulic pipes and hoses in steering system |
| Excessive free play of steering wheel |
| Steering column coupling or shaft is extremely worn out - Replace faulty part |
| Defective or worn power steering control valve - Inspect and replace as required |
| Steering pump malfunction - Check the steering pump and replace if necessary |
| Steering tie-rod ends or linkage are worn - Change failed part |
| Front wheels wander to left or right |
| Tires are deflated - Need to inflate tires |
| Toe-in adjustment is incorrect - Adjust toe-in properly |
| Steering linkage or tie-rod ends are worn - Change damaged component |
| Power steering control valve has wear or malfunction - Inspect and replace as required |
| Steering cylinder malfunction - Repair or change steering cylinder |
| Incorrectly adjusted or worn front hub bearings - Adjust correctly or install new bearings |
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| Farm Tractors Technical Specifications |
