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John Deere 2520 Troubleshooting

John Deere 2520 Engine Troubleshooting

Engine starts up hard or won't start: Clogged fuel filter. Clean or replace the filter. Air in the fuel system. Air bleeding. Fuel injection nozzles are clogged or faulty. Check and replace nozzles if required. Fuel injection pump is not working correctly. Rebuild or change fuel pump.

Engine stops running suddenly: Improper fuel injection timing. Set up as recommended. Fuel filter element clogging. Clean or replace the filter. Engine not warmed up. Warm up engine as required.

Engine starts but then stops: Fuel filter plugged. Service or replace the filter. Fuel injection pump is faulty. Rebuild or change fuel pump. Dirty air filter. Clean or replace the element.

Engine is overheated: Radiator fins are dirty or radiator cap is defective. Clean radiator or change cap. Lack of coolant in cooling system. Add coolant and check the components of cooling system. Excessive wear of the fan belt. Fan belt must be replaced. Engine oil insufficient. Fill up the oil to required level.

Engine lacks power: Clogged or defective injection nozzles. Check and replace nozzles if required. Fuel hoses or lines are dirty. Service fuel hoses and lines. Air filter clogged. Clean or replace element. Cylinder head gasket is defective. Replace cylinder head gasket.

Engine knocks or noises: Low coolant temperature. Warm up to required temperature. Not enough engine oil. Check and refill engine oil. Improper fuel injection timing. Adjust the pump as required. Worn or broken pistons. Have pistons replaced. Faulty or misaligned connecting rod. Need to replace or align the connecting rod.

Engine shuts off while idling: Low idle speed setting is incorrect. Adjust the low idle speed. Incorrect valve clearance. Adjust valve clearance. Fuel injection pump failure. Change or repair the pump.

Oil pressure is insufficient: Not enough oil in the engine. Fill up the engine oil. Oil pump malfunction. Remove and inspect oil pump. Oil filter element is dirty. Replace or service engine oil filter.

John Deere 2520 Hydrostatic Transmission Troubleshooting

Hydrostatic transmission makes excessive noise: Speed control linkage is worn or unadjusted. Adjust or install new linkage. Transmission overload. Load needs to be reduced. Transmission fluid is dirty or fluid level is too low. Pour fresh fluid or add transmission fluid to proper level. Relief valve malfunction. Replace valve as required. Transmission components are damaged or worn. After disassembly and inspection, replace defective components.

Transmission fluid overheated: Excessive loading. Reduce loading. Clogged or damaged cooling components. Check all cooling components and change or repair if required. Transmission fluid insufficient. Add fluid to the transmission housing. Transmission fluid filter element is clogged. Replace or service transmission fluid filter.

Loss of power: Insufficient transmission oil. Add oil to the transmission housing. Relief valve is damaged. Replace relief valve as required. Speed control pedal linkage is bent or not adjusted. Adjust or replace linkage.

Transmission oil leaking: Plugged oil return tube. Clean or replace return tube. Damaged gaskets or seals. Install new components. Transmission case internal pressure is too high. Repair or replace damaged components.

John Deere 2520 Hydraulics Troubleshooting

Hydraulics overheating: Improper type of hydraulic oil. Use the proper type of oil. Hydraulic fluid contamination. Change hydraulic fluid. Air in hydraulic system. Bleed air from hydraulic system. Main relief valve failure. Replace relief valve.

Low hydraulic oil pressure: Hydraulic oil is insufficient. Fill the system to proper hydraulic oil level. Hydraulic fluid filter element is clogged. Replace filter element or clean if required. Leaks in hydraulic lines. Identify leaks in the system and repair it. Hydraulic control valve is not set properly. Adjust properly. Defective hydraulic pump. Repair or replace hydraulic oil pump. Broken hydraulic cylinder. Change or repair hydraulic cylinder.

3-point hitch can't lift or lifts too slowly: Hydraulic pump not working. Install a new hydraulic oil pump. Main relief valve failure. Change relief valve. Defective hydraulic spool valve block. Repair or replace hydraulic valve. Damaged hydraulic cylinder. Install a new hydraulic cylinder or repair it. Insufficient hydraulic fluid. Add fluid as required. Hydraulic oil filter is clogged. Clean or change hydraulic filter. Heavy load on the hitch. Reduce hitch load.

Hitch cannot be lowered or lowering is too slowly: Hydraulic cylinder is faulty. Replace or repair hydraulic cylinder. Incorrect adjusted hydraulic control valve. Adjust correctly. Damaged lift arm shaft. Replace the shaft. The 3-point hitch is not adjusted. Adjust 3-point hitch as required.

Hitch lift or lower is jerky: Hydraulic oil is contaminated. Fill up with fresh hydraulic oil. Hydraulic pump is faulty. Change or repair hydraulic oil pump. Air in hydraulic lines. Bleed hydraulic lines. Defective hydraulic spool valve. Install a new valve or repair it. Damaged hydraulic cylinder. Install a new hydraulic cylinder or repair it.

John Deere 2520 Steering System Troubleshooting

Steering wheel has too much free-play: Steering column shaft or coupling is worn out. Change faulty component. Steering pump stopped working. Install a new steering pump. Loose or worn steering linkage components. Repair or change steering linkage. Power steering control valve has damage or wear. Check and replace as required.

Excessive effort to steer: Air lock in the steering system. Bleed air from system. Steering filter is plugged. Install new steering filter element. Not enough steering oil. Check oil level and add steering oil as required. Power steering control valve has malfunction or wear. Check and replace as required. Faulty steering pump. Install a new steering pump. Stuck or damaged steering pump control valve. Change or flush control valve. Damaged or incorrectly assembled steering column. Replace steering column or assemble correctly. Uneven wear on front tyres. Replace the tyres. Not adjusted toe-in. Check and adjust toe-in. Steering cylinder is leaking. Damaged cylinder seals or worn piston rod.

Front wheels wander to left or right: Power steering control valve has malfunction or wear. Check and replace as required. Worn steering cylinder. Replace or repair steering cylinder. Incorrect toe-in. Adjust toe-in properly. Steering linkage components are loose or worn. Replace or repair steering linkage. Front wheel bearings are defective or improperly adjusted. Replace or adjust the bearings correctly. Front tyres wear unevenly. Change the tyres.

John Deere 2520 Electrical Troubleshooting

Battery does not charge: Electrical wire connections are loose or corroded. Service or tighten connections. Battery terminal clamps are defective. Replace terminal clamps. Battery is defective. Replace the battery. Belt is worn or loose. Change belt or adjust belt tension.

Starter cranks slow: Battery power is low. Low battery charging, charge as required. Battery runs out quickly. Service battery or change it. Battery cables are disconnected or terminals are faulty. Check wire connections and change or service terminals.

Starter does not work: Battery is drained or worn. Replace or charge as required. Disconnected or incorrectly connected wires. Inspect battery wires and connect correctly. Low battery output voltage. Battery is drained, charge it. Starter motor is defective. Replace or repair starter.

JOHN DEERE TRACTORS ATTACHMENTS
1023E	2025R	2210	2520	3032E
3046R	3520	4066R	4105	4200
4320	4400	4520	4600	4720
430	420	455	X300	X350
X485	X500	X590	X700	X738

JOHN DEERE TRACTORS TROUBLESHOOTING
2640	3040	3310	3650	4100
5050D	5090R	5410	6105R	7200R
E130	L111	LA110	LT155	X300R