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John Deere 3020 Troubleshooting
The
John Deere 3020 is a New Generation series row crop tractor. This model was
manufactured from 1964 to 1972. The JD 3020 tractor is powered by 270 cubic
inches (4.4 L) John Deere 4-cylinder water cooled diesel engine with a rated
power of 77 hp (57 kW), or 227 cubic inches (3.7 L) John Deere 4-cylinder water
cooled gasoline engine with a rated power of 76 hp (56.3 kW).
The John Deere 3020 was fitted with 2 types of transmission. Type 1: 8x2
syncro-range partially synchronized transmission. Type 2: Powershift
transmission with 8 forward and 4 reverse gears.
The maximum forward speed - 19.5 mph (31.4 km/h), max. reverse speed -
6.2 mph (10 km/h). The closed center hydraulic system includes a gear
pump with rated capacity of 14 gpm (53 lpm). The hydraulic system
pressure is 145 bar (2100 psi). The tractor was equipped with 6.00x16 or
7.50x15 front tires and 13.6x38 or 15.5x38 rear tires. The wheelbase is
90" (2280 mm).
The John Deere 3020 is compatible with JD 48 loader with a liftting
capacity to full height of 2400 lbs (1088 kg), or
JD 148 loader with a
lifting capacity to full height of 3100 lbs (1406 kg).
| Diesel Engine Troubleshooting |
| Engine won't start or difficult to start |
| Fuel filter is clogged - Clean the filter or install new filter element |
| Fuel supply valve is closed - Open fuel supply valve |
| Air in fuel pipes - Bleed fuel pipes |
| Fuel injectors are clogged or faulty - Inspect fuel injectors and replace if necessary |
| Fuel injection pump is faulty - Change pump or rebuild it |
| Bad cylinder compression - Check cylinder block and replace damaged components |
| Engine stops running unexpectedly |
| Low coolant temperature - Engine is not warmed up to the required temperature |
| There is air in the fuel system - Bleed the system |
| Fuel injection failed - Use correct settings |
| Dirty fuel filter element - Change the filter element |
| Dirty or faulty injectors - Inspect fuel injectors and replace if necessary |
| Diesel starts and stalls suddenly |
| Timing of fuel injection pump is not adjusted - Check and correct settings |
| Fuel filter plugging - Change the filter element |
| Fuel injector nozzles are dirty or defective - Service or replace injector nozzles |
| Fuel injection pump is defective - Replace or repair injection pump |
| Clogged air cleaner - Replace or service air cleaner element |
| Improperly adjusted low idle speed - Correct low idle adjustment |
| Damaged fuel injection pump - Repair or replace injection pump |
| Dirty or defective injector nozzles - Change or clean injector nozzles |
| The valve clearance is incorrect - Adjustment procedure required |
| Low engine coolant - Add the coolant. Inspect the system for leaks |
| Cooling system components are worn or system is clogged - Service the cooling system or replace faulty components |
| Lack of engine oil - Check and refill engine oil |
| Fan belt is broken or belt tension is unadjusted - Adjust as required or change belt |
| Thermostat fault - Thermostat needs to be replaced |
| Dirty or faulty injectors - Service or change fuel injectors |
| Fuel injection pressure is incorrect - Adjust pressure to proper level |
| Dirty air filter - Air filter maintenance required |
| Oil filter is dirty - Replace or service engine oil filter |
| Diesel engine is overloaded - Reduce engine load |
| Valve clearance is wrong - Adjust to proper valve clearance |
| Low idle speed set incorrectly - Test and adjust |
| Clogged fuel pipes or hoses - Clean fuel system pipes and hoses |
| Engine compression is insufficient: Intake or exhaust valves are damaged - Valves need to be replaced |
| Timing of fuel injection pump is wrong - Adjust the fuel injection pump timing correctly |
| Dirty or defective injector nozzles - Install new set of properly balanced nozzles |
| Lack of engine oil - Check oil level and add oil as required |
| Engine is cold - Normalize the temperature by warming up the engine |
| Worn crankshaft or main bearings - Replace crankshaft or bearings |
| Worn or broken piston rings - Have piston rings replaced |
| The flywheel to crankshaft bolts are loose - Tighten bolts as required |
| Excessive oil consumption |
| External oil leaks: Worn seals or gaskets - Change worn parts according to specifications |
| Oil viscosity is incorrect - Fill up with the correct oil viscosity |
| Worn or stuck piston rings - Replace piston rings |
| Valve stems or guides are damaged - Change the valves |
| Scuffed pistons or cylinder liners - Inspect pistons and liners, change as required |
| Electrical System Troubleshooting |
| Battery is not charging |
| Battery is worn - Use a new battery |
| Bad battery cable harness - Inspect cables for malfunctions, repair or change |
| Loose or corroded terminals and cables - Service or tighten battery terminals and cables |
| Belt slipping or wrong belt tension adjustment - Adjust belt tension correctly or replace belt |
| Low battery voltage - Low battery charging, charge as required |
| Battery will not hold charge - Service charging system or change battery |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Corroded or loose battery terminals and cables - Cables and terminals must be tightened or cleaned |
| Battery capacity is low - Battery is drained, charge it |
| Discharged or defective battery - Change or recharge battery |
| Faulty starter motor - Repair or change starter |
| Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required |
| Transmission Troubleshooting |
| Gears are hard to shift |
| Misadjusted or defective clutch - Change or adjust clutch |
| Gear shift linkage is stuck or damaged - Repair or change shift linkage |
| Damaged or worn shift forks - Replace the shift forks |
| Defective gearshift mechanism - Replace defective components |
| Insufficient transmission oil pressure |
| Not enough fluid in transmission - Fill the transmission housing with fluid |
| Clogged transmission fluid filter element (if fitted) - Change or clean the transmission fluid filter |
| Relief valve is defective - Install a new valve |
| Excessive transmission noise |
| Cracked or worn bearings - Install new bearings |
| Low transmission oil level - Add transmission oil as required |
| Transmission fluid contamination - Transmission fluid must be changed |
| Damaged gears or improper backlash - Change worn gears or set backlash correctly |
| Shift forks are worn or damaged - Install new shift forks |
| Gaskets or seals are defective Install new gaskets or seal |
| Cracked transmission housing - Housing needs to be replaced |
| Hydraulics Troubleshooting |
| Hydraulic system overheating |
| Incorrect hydraulic pressure adjustments - Adjust correctly |
| Main relief valve malfunction or incorrect adjustment - Replace or set up the relief valve |
| Dirty hydraulic oil - The oil must be changed |
| Hydraulic system sucks air - Inspect the pump seals, suction pipe, and fittings |
| Low hydraulic fluid pressure |
| Lack of hydraulic fluid - Check and refill the hydraulic fluid |
| Hydraulic fluid filter clogging - Clean or replace the hydraulic filter |
| Hydraulic pump not working - Test pump performance and replace pump if necessary |
| Hydraulic control valve block is defective or set improper - Change or adjust correctly |
| Defective hydraulic cylinder - Inspect cylinder components for wear or damage and change if required |
| Leakage in hydraulic pipes - Find leaks in hydraulic system and repair it |
| 3-point hitch raises slowly or won't raise |
| Hydraulic fluid level is low - Add fluid to the hydraulic system |
| Cold hydraulic oil - Warm up the oil |
| Hydraulic fluid filter element is dirty - Clean the hydraulic filter or install new filter element |
| Hydraulic pump not working - Check pump capacity and change if necessary |
| Main relief valve failure or incorrect setting - Adjust or change relief valve |
| Defective or not adjusted hydraulic control valve - Change or adjust properly |
| Hydraulic cylinder malfunction - Inspect cylinder parts for wear or damage and replace if required |
| Suction pipe is damaged or loose - Repair or change |
| 3-point hitch won't drop or drops slowly |
| Hydraulic spool valve block is faulty or out of adjustment - Change or set correctly |
| Hydraulic cylinder is broken - Inspect cylinder components for wear or damage and change if required |
| Hitch rock shaft is damaged - Change the shaft |
| The hitch has internal mechanical malfunctions - Replace defective or worn hitch parts |
| Hitch jerks when lift or lower |
| Air trapped in the hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Defective hydraulic pump - Flow-rate hydraulic pump and replace pump if necessary |
| Faulty or incorrect setting hydraulic spool valve - Adjust correctly or change |
| Hydraulic cylinder is faulty - Check cylinder parts for wear or damage and replace if necessary |
| Steering System Troubleshooting |
| Steering wheel turns hard |
| Worn or improperly mounted steering column - Mount the steering column properly or change it |
| Air enters in steering system - Bleed air from system |
| Improper toe-in adjustment - Adjust toe-in correctly |
| Low tire pressure - Inflate the tires |
| Steering pump is faulty - Replace or repair steering pump |
| Steering valve is worn or defective - Repair or change the steering valve |
| Faulty steering valve cylinder parts - Change defective steering valve cylinder components |
| Lack of steering oil - Fill the steering system with oil |
| Steering system has oil leaks - Retighten steering hose and pipe connections |
| Excessive play in steering |
| Steering column shaft or coupling is worn out - Replace defective component |
| Worn or defective steering valve - Inspect and change as required |
| Damaged steering valve cylinder components - Change defective steering valve cylinder parts |
| Steering pump stopped working - Check the hydraulic steering pump and change if necessary |
| Faulty or worn steering linkage or tie-rod ends - Change damaged part |
| Tractor is pulling to right or left |
| Tire pressure is not correct - Check tire pressure and inflate as required |
| Incorrect toe-in - Adjust toe-in wheels properly |
| Steering tie-rod ends or linkage are worn - Replace failed component |
| Faulty or worn steering valve - Change or repair steering valve if required |
| Defective steering valve cylinder - Repair or replace steering valve cylinder |
| Damaged or improperly adjusted or worn front hub bearings - Adjust correctly or change bearings |
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| Farm Tractors Technical Specifications |
