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John Deere 4230 Troubleshooting
The
John Deere 4230 is a Generation 2 series row crop tractor. This model was
manufactured from 1973 to 1977. The JD 4230 powerline system components: John
Deere 4 cycle 6-cylinder diesel engine and 16x6 Quad-Range partial power shift
and synchronized transmission, or 8x4 full power shift transmission, and 8x2
Syncro Range partially synchronized transmission.
A 404 cu.in (6.6 L) engine power rating is 111 hp (80.5 kW) at 2200 rpm.
Maximum forward speed - 20.5 mph (33 km/h), maximum reverse speed - 10.5
mph (16.9 km/h).
The closed center hydraulic system includes a piston pump with a rated
fluid flow of 23 gal/min (87 l/min). The hydraulic system pressure is
170 bar (2500 psi). The John Deere 4230 is fitted with 11.0x16 or
9.5Lx15 front tires and 18.4x26 or 23.1x26 rear tires. The wheelbase is
104" (2640 mm). The tractor can be equipped with the following front end
loaders: John Deere 148 loader with a lift capacity to maximum height of
3100 lbs (1405 kg), or John Deere 158 loader with a lift capacity to
full height of 3800 lbs (1725 kg).
| Diesel Engine Troubleshooting |
| Engine won't start or starts hard |
| Clogged fuel filter element - Filter maintenance required |
| Fuel supply valve is closed - Open fuel supply valve |
| Fuel-line is leaking air - Retighten clamps, replace defective pipes |
| Fuel injectors are clogged or faulty - Clean or replace fuel injectors |
| Damaged fuel injection pump - Replace injection pump or repair it |
| Engine has bad compression - Check and change damaged parts |
| Engine shuts off unexpectedly during operation |
| Engine is cold - Engine is not warmed up to the required temperature |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Improper fuel injection - Fuel injection settings required |
| Dirty fuel filter element - Clean or replace the filter |
| Fuel injectors are damaged or dirty - Change fuel injectors |
| Diesel starts and then stalls |
| Incorrect setting of fuel injection pump timing - Adjust injection timing |
| Fuel filter is clogged - Clean or change the filter |
| Fuel injector nozzles are faulty - Service or replace nozzles if required |
| Defective fuel injection pump - Rebuild or install a new injection pump |
| Air cleaner element clogging - Change or service air cleaner element |
| Engine stops at low idle speed |
| Incorrectly set low idle speed - Adjustment required |
| Faulty fuel injection pump - Replace or rebuild injection pump |
| Fuel injector nozzles are faulty - Check and change nozzles as required |
| Incorrect valve clearance - Adjust valve clearance |
| Lack of engine coolant - Top up coolant fluid. Inspect the system for leaks |
| Cooling system is clogged or cooling parts are defective - Service the cooling system or change faulty parts |
| Lack of engine oil - Fill the crankcase with engine oil |
| Fan belt tension is not adjusted or belt is broken - Adjust belt tension properly or change it |
| Defective thermostat - Test thermostat opening temperature, replace as required |
| Clogged or damaged injectors - Test fuel injectors and change if necessary |
| Incorrect fuel injection pressure - Correct the pressure settings |
| Air filter element is clogged - Clean or replace the air filter element |
| Oil filter element clogging - Replace or service engine oil filter |
| Diesel engine overloaded - Load reducing is recommended |
| Excessive valve clearance - Have it adjusted |
| Low idle speed setting is incorrect - Adjust the low idle speed |
| Dirt in the fuel pipes or hoses - Clean fuel pipes and hoses |
| Engine compression too low: Leaking or broken valves - Valves need to be replaced |
| Timing of fuel injection pump is wrong - Adjust injection timing |
| Damaged or clogged injector nozzles - Install a new set of well-balanced nozzles |
| Engine oil level low - Check oil level and add oil as required |
| Engine has not warmed up to the recommended temperature - Warm up to required temperature |
| Crankshaft or main bearings wear - Need to install new components |
| Piston rings are defective or broken - Piston rings replacement required |
| Flywheel screws are loose - Tighten the screws firmly |
| Oil leaks: Gaskets or seals may be damaged - To repair leaks, replace worn parts |
| Oil viscosity is wrong - Use oil of proper viscosity |
| Piston rings are seized or worn - Change the piston rings as required |
| Valve stems or guides are damaged - Change the valves |
| Damaged cylinder liners or pistons - Inspect pistons and liners, fit new components as necessary |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Battery is defective - Battery change required |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Loose or corroded cables and terminals - Tighten or service cables and terminals |
| Belt is damaged or belt tension is incorrectly adjusted - Change belt or properly adjust belt tension |
| Low battery output voltage - Battery needs to be recharged |
| Battery will not hold charge - Service charging system or change battery |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Corroded or loose battery cables and terminals - Tighten or service cables and terminals |
| Low battery output voltage - Battery needs to be recharged |
| Discharged or defective battery - Need to charge or replace the battery |
| Damaged starter motor - Starter should be changed |
| Disconnected or incorrectly connected wiring harness - Inspect wiring harness and reconnect it as required |
| Transmission Troubleshooting |
| Gear hard to shift |
| Failure or improper clutch adjustment - Clutch needs to be replaced or adjusted |
| Gear shift linkage is damaged or loose - Service or replace shift linkage |
| Shift forks are worn or damaged - Change the shift forks |
| Gear shifting mechanism is worn - Change worn components |
| Transmission oil pressure is insufficient |
| Fluid level is low - Fill the transmission housing with fluid |
| Clogged transmission oil filter (if equipped) - Replace or clean transmission oil filter |
| Relief valve is defective - Replace valve as required |
| Transmission is making noise |
| Broken or worn bearings - Change faulty bearings |
| Fluid level is low - Check transmission fluid level and add it as required |
| Contaminated transmission fluid - Fill up with fresh transmission fluid |
| Damaged gears or improper backlash - Set backlash correctly or change the gears |
| Shift forks are worn or damaged - Change defective shift forks |
| Transmission fluid leaking |
| Worn gaskets or seals - Install new seal or gaskets |
| Cracked transmission housing - Housing needs to be replaced |
| Hydraulics Troubleshooting |
| Hydraulic system overheats |
| Improper pressure in hydraulic system - Adjust properly |
| Main relief valve incorrect adjustment or failure - Adjust the valve or replace if necessary |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Air in hydraulic system - Inspect the pump seals, suction pipe, and fittings |
| Insufficient hydraulic fluid pressure |
| Hydraulic fluid level is low - Check and refill the hydraulic fluid |
| Hydraulic fluid filter is clogged - Change hydraulic filter element or clean if necessary |
| Faulty hydraulic oil pump - Check pump flow and change pump if necessary |
| Faulty or incorrect setting hydraulic spool valve - Replace or set correctly |
| Hydraulic cylinder failure - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Hydraulic pipes are leaking - Find leaks in the system and fix it |
| 3-point hitch lifts slowly or won't lift |
| Hydraulic oil level is insufficient - Fill up the hydraulic oil |
| Hydraulic fluid is too cold - Allow fluid to warm |
| Hydraulic fluid filter is clogged - Service the hydraulic filter or change if required |
| Faulty hydraulic oil pump - Test pump flow rate and replace pump if required |
| Faulty or incorrectly adjusted main relief valve - Replace or set up the relief valve |
| Defective or incorrect setting hydraulic spool valve block - Adjust properly or change |
| Defective hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Damaged or loose suction line - Tighten or change |
| 3-point hitch lowers slowly or won't lower |
| Hydraulic control valve is faulty or out of adjustment - Change or adjust correctly |
| Hydraulic cylinder is faulty - Check cylinder components for damage or wear and change if necessary |
| Lift arm shaft is worn - Change the shaft |
| The hitch has mechanical faults - Change damaged or worn hitch parts |
| Hitch lowering or lifting is not smoothly |
| Hydraulic system sucks air - Inspect the pump seals, suction pipe, and fittings |
| Contaminated hydraulic oil - Change hydraulic oil |
| Hydraulic pump is faulty - Flow-rate pump and change pump if necessary |
| Damaged or incorrect adjusted hydraulic spool valve - Replace or adjust correctly |
| Hydraulic cylinder malfunction - Inspect cylinder components for damage or wear and change if required |
| Steering System Troubleshooting |
| Steering wheel is very heavy to turn |
| Damaged or improperly installed steering column - Reinstall or replace the steering column |
| Air trapped in the steering system - Bleed air |
| Not adjusted toe-in - Adjust toe-in correctly |
| Deflated front tyres - Inflate tyres as needed |
| Steering pump failure - Steering pump needs to be replaced or repaired |
| Steering valve is worn or defective - Inspect and change as required |
| Relief valve is stuck or worn - Clean or change the relief valve |
| Insufficient steering oil - Need to add steering oil |
| Oil leakage in the steering system - Retighten steering hose and pipe connections |
| Excessive steering wheel free play |
| Steering column shaft or coupling is worn out - Replace faulty component |
| Faulty or worn steering valve - Repair or change the steering valve |
| Steering pump is worn - Repair or replace steering pump |
| Steering linkage or tie-rod ends are worn - Replace failed part |
| Front wheels wander to right or left |
| Tire pressure is improper - Inflate the tires properly |
| Improper toe-in - Check and adjust toe-in |
| Faulty or worn steering tie-rod ends or linkage - Replace damaged part |
| Defective or worn steering valve - Change or repair steering valve if required |
| Steering valve cylinder is worn - Repair or change steering valve cylinder |
| Worn or incorrectly adjusted or worn front hub bearings - Replace the bearings or adjust it properly |
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| Farm Tractors Technical Specifications |
