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John Deere 1520 Troubleshooting

John Deere 1520 Engine Troubleshooting

Engine hard to start or will not start: Fuel filter plugged. Clean the filter or install new filter element. Air in fuel system. Bleed fuel system. Damaged or dirty injection nozzles. Test injection nozzles and change if necessary. Faulty fuel injection pump. Rebuild or change fuel pump.

Engine shuts off suddenly while running: Improper fuel injection timing. Adjust the pump as required. Fuel filter plugging. Clean the filter or install new filter element. Engine is not warmed up to the required temperature. Warm up the engine.

Engine starts and stalls suddenly: Dirty fuel filter. Change filter element. Fuel injection pump is faulty. Rebuild or change fuel pump. Plugged air cleaner. Replace air filter element.

Engine overheated: Defective radiator cap or clogged radiator fins. Clean radiator or install new cap. Low engine coolant. Refill to the correct level and inspect system for leaks. Loose or defective fan belt. The fan belt needs to be replaced. Engine oil level low. Fill the crankcase with engine oil.

Engine lacks power: Fuel injection nozzles are faulty or clogged. Service or change injection nozzles. Clogged fuel lines or hoses. Fuel hoses and lines must be clean. Air filter plugged. Air filter maintenance required. Damaged cylinder-head gasket. Gasket should be replaced.

Engine noises or knocks: Engine is not preheated. Engine is not warmed up to the required temperature. Engine oil insufficient. Check oil level and add oil as required. Improper fuel injection timing. Adjust fuel injection pump as required. Pistons are scored or worn. Have pistons replaced. Connecting rod is misaligned or worn. Alignment procedure or replacement is required.

Engine stalls when idle: Low idle speed set incorrectly. Adjust the low idle speed. Improper valve clearance. Adjustment procedure required. Fuel injection pump is damaged. Repair or install a new fuel pump.

Low oil pressure: Oil level is insufficient. Fill the crankcase with oil. Oil pump failure. Inspect and change as required. Oil filter is dirty. Service or replace engine oil filter.

John Deere 1520 Transmission Troubleshooting

Transmission noise: Gears are damaged or backlash is incorrect. Replace gears or adjust backlash correctly. Shift forks are bent or worn out. Replace defective shift forks. Worn or damaged shaft splines. Shaft need to be replaced. Insufficient transmission fluid. Check and refill the transmission fluid. Worn or damaged bearings. Replace faulty bearings. Transmission fluid contamination. Change the fluid.

Gears are hard to shift: Gear shift linkage is corroded or worn. Install a new gear shift linkage. Worn or improperly adjusted clutch. Adjust clutch or replace if required. Damaged or worn gear shift forks. Replace defective shift forks. Worn parts of the gear shifting mechanism. Change worn parts.

Low transmission oil pressure: Insufficient transmission oil. Fill the transmission housing with oil. Dirty transmission fluid filter (if fitted). Service or replace the transmission fluid filter. Relief valve failure. Replace relief valve.

Transmission fluid leaking: Worn seals or gaskets. Install new seal or gaskets. Too much fluid in transmission. Excess fluid must be drained.

John Deere 1520 Hydraulics Troubleshooting

Hydraulic system is overheated: Incorrect hydraulic oil type. Use the correct type of hydraulic oil. Hydraulic oil is dirty. Hydraulic oil change required. There is air in the hydraulic system. Bleed hydraulic system. Main relief valve is damaged. Change relief valve.

Low hydraulic system pressure: Insufficient hydraulic fluid. Fill up the hydraulic fluid. Clogged hydraulic fluid filter. Install a new hydraulic filter element. Leaks in hydraulic pipes. Check the hydraulic system and fix leaks. Incorrect setting hydraulic control valve block. Set correctly. Hydraulic pump not working. Replace or repair hydraulic oil pump. Hydraulic cylinder malfunction. Replace or repair hydraulic cylinder.

3-point hitch cannot be raised or raising is too slowly: Hydraulic pump failure. Replace or repair hydraulic oil pump. Main relief valve malfunctioning. Replace relief valve. Hydraulic control valve block is defective. Install a new valve or repair it. Hydraulic cylinder is broken. Replace or repair hydraulic cylinder. Insufficient hydraulic fluid. Add fluid as required. Dirty hydraulic fluid filter element. Install a new hydraulic filter element. Hitch is under excessive load. Reduce loading.

Hitch cannot be dropped or dropping is too slow: Broken hydraulic cylinder. Replace or repair hydraulic cylinder. Hydraulic control valve block is out of adjustment. Control valve needs to be adjusted. Worn hitch rock shaft. Replace the shaft. Unadjusted hitch. Need to make adjustments.

Hitch drop or lift is jerky: Hydraulic oil is dirty. Hydraulic oil change required. Hydraulic pump failure. Replace or repair hydraulic oil pump. Air trapped in hydraulic system. Bleed air from system. Damaged hydraulic control valve. Repair or replace hydraulic valve. Faulty hydraulic cylinder. Repair or replace hydraulic cylinder.

John Deere 1520 Steering System Troubleshooting

Steering wheel has too much free-play: Steering column coupling or shaft has maximum wear. Change defective part. Worn steering pump. Repair or replace steering pump. Steering linkage joints are worn or loose. Replace or repair steering linkage. Steering gearbox parts are damaged. Repair power steering box.

Steering wheel turns hard: Air in steering system. Bleed the steering system. Clogged steering filter. Clean or replace filter element. Not enough steering fluid. Fill up steering fluid to required level. Steering gearbox parts are faulty. Repair power steering gearbox. Steering pump failure. Check the hydraulic steering pump and change if necessary. Pump flow control valve is stuck or damaged. Replace or clean flow control valve. Incorrectly mounted or defective steering column. Mount the steering column correctly or replace it. Tires have uneven wear. Replace the tires. Not adjusted toe-in. Check and adjust toe-in. Steering cylinder leakage. Replace worn seal sleeves or damaged piston rod.

Tractor is pulling to left or right: Steering gear box parts are faulty. Repair power steering gearbox. Worn steering cylinder. Repair or replace steering cylinder. Incorrect toe-in. Adjust toe-in properly. Worn or loose steering linkage assembly. Repair or replace steering linkage. Worn or incorrectly adjusted or worn front wheel bearings. Adjust properly or change bearings. Tire pressure is uneven. Adjust the tire pressure.

John Deere 1520 Electrical System Troubleshooting

Battery cannot be charged: Corroded or loose wire connections. Service or tighten cable connections. Electrical terminal connectors are defective. Change terminal connectors. Bad cell in battery. Install a new battery. Defective or loose belt. Need to adjust belt tension or replace belt.

Starter turning slow: Low battery output. Charge the battery. Battery drains quickly. Battery needs service or replacement. Disconnected wires or corroded battery terminals. Check wire connections and change or service terminals.

Starter doesn't crank: Battery is low or faulty. Change or recharge battery. Wiring is improperly connected or disconnected. Check wiring and connect properly. Battery voltage is low. Recharge the battery. Faulty starter motor. Starter should be replaced.

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