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Ford 4000SU Tractor Troubleshooting
The
Ford 4000SU is a two-wheel drive special utility tractor. This model was
manufactured between 1970 and 1976. The Ford 4000 SU tractor is equipped with a
Ford 3-cylinder water cooled diesel engine with a rated power of 57 hp (42.5
kW), or vertical 3-cylinder gasoline engine with a rated power of 56 hp (41.5
kW).
The Dual-Range transmission consists of a dry clutch and gearbox with 8
forward and 2 reverse gears. Max. travel speed (forward/reverse): 15 mph
(24.1 km/h) and 7.2 mph (11.6 km/h). The open center hydraulic system
used a gear pump with a flow rate of 5.4 gal/min (20.8 l/min).
The hydraulic pressure is 173 bar (2500 psi). The Ford 4000SU was
equipped with a power steering system, wet dics brakes, 7.50x15 or
7.50x16 front tires, and 14.9x28 or 16.9x24 rear tires. The wheel base
is 77.3 inches (1960 mm).
| Diesel Engine Troubleshooting |
| Engine will not start or difficult to start |
| Fuel filter is dirty - Change filter element |
| Fuel supply valve is closed - Open fuel supply valve |
| Fuel lines leaking air - Tighten clamps, change faulty pipes |
| Fuel injectors are defective or dirty - Service or change fuel injectors |
| Fuel injection pump malfunctioning - Repair or change injection pump |
| Poor cylinder compression - Check cylinder block and change worn components |
| Engine stops unexpectedly while running |
| Engine is not warmed up to required temperature - Normalize the engine temperature |
| Air trapped in fuel system - Bleed air |
| Irregular fuel injection - Adjust fuel injection timing |
| Plugged fuel filter - Filter maintenance required |
| Dirty or damaged injectors - Clean or replace fuel injectors |
| Diesel starts and immediately shuts off |
| Unadjusted fuel injection pump timing - Repair or replace fuel injection pump |
| Clogged fuel filter element - Clean the filter element |
| Fuel injector nozzles are damaged - Check and change nozzles as required |
| Defective fuel injection pump - Repair or replace injection pump |
| Clogged air cleaner - Air cleaner maintenance required |
| Improperly adjusted low idle speed - Correct low idle adjustment |
| Faulty fuel injection pump - Replace or repair injection pump |
| Fuel injector nozzles are defective or dirty - Change or clean injector nozzles |
| The valve clearance is not adjusted - Have it adjusted |
| Coolant level is low - The cooling system needs to be refilled. Check radiator and hoses for leaks |
| Cooling system components are failed or system is dirty - Change faulty components or service cooling system |
| Engine oil level is insufficient - Fill the crankcase with engine oil |
| Incorrect fan belt tension or broken belt - Adjust belt tension correctly or change it |
| Thermostat fault - Check thermostat, replace if necessary |
| Fuel injectors are defective or dirty - Clean or replace fuel injectors |
| Fuel injection pressure is incorrect - Adjust pressure to proper level |
| Air filter clogging - Change or service air filter element |
| Dirty oil filter element - Service or change engine oil filter element |
| Engine overload - Reduce the load or operate the tractor in lower gears |
| The valve clearance is not adjusted - Need to adjust valve clearance |
| Incorrect low idle speed adjustment - Adjust the low idle speed |
| Dirt in the fuel pipes or hoses - Fuel pipes and hoses need to be cleaned |
| Engine compression is insufficient: Valves are damaged or leaking - Install new valves |
| Fuel injection pump timing is incorrect - Check and correct settings |
| Dirty or defective injector nozzles - Install new set of properly balanced nozzles |
| Engine oil level is low - Fill up the oil to required level |
| Engine has not warmed up to recommended temperature - Normalize the engine temperature |
| Main bearings or crankshaft are worn out - Change defective components as required |
| Piston rings are damaged or broken - Replace piston rings |
| Flywheel screws are loose - Tighten the screws firmly |
| Excessive engine oil consumption |
| External oil leaks: Worn gaskets or seals - Change worn parts according to specifications |
| Incorrect oil viscosity - Fill up with the correct oil viscosity |
| Piston rings are stuck or broken - Replace piston rings |
| Damaged valve stems or valve guides - Replace the valves |
| Cylinder liners or pistons are scuffed - Check pistons and liners, replace as required |
| Electrical System Troubleshooting |
| Battery does not charge |
| Battery dead cell - Battery change required |
| Bad battery cable harness - Inspect cables for malfunctions, repair or change |
| Corroded or loose battery terminals and cables - Service or tighten battery cables and terminals |
| Belt wear or improper belt tension adjustment - Change belt or correctly adjust belt tension |
| Low battery output voltage - Battery is drained, recharge it |
| Battery discharges quickly - Battery needs service or replacement |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Battery cables and terminals are loose or corroded - Service or tighten battery terminals and cables |
| Low battery output - Battery needs to be recharged |
| Drained or faulty battery - Need to charge or replace the battery |
| Starter motor is defective - Starter should be replaced |
| Incorrectly connected or disconnected wires - Check battery wires and connect correctly |
| Transmission Troubleshooting |
| Gear hard to shift |
| Worn or misadjusted clutch - Clutch needs to be adjusted or changed |
| Gear shift linkage is stuck or worn - Replace or repair the shift linkage |
| Damaged or worn shift forks - Shift forks need to be replaced |
| Faulty gear shifting mechanism - Faulty parts must be changed |
| Transmission oil pressure is low |
| Oil level is insufficient - Add transmission oil as required |
| Transmission oil filter element is dirty (if fitted) - Replace or service transmission oil filter |
| Relief valve is defective - Change relief valve |
| Excessive transmission noise |
| Cracked or worn bearings - Replace the bearings |
| Insufficient oil supply - Fill up the transmission oil |
| Dirty transmission oil - Fill up with fresh transmission oil |
| Backlash is incorrect or gears are worn - Change the gears or adjust backlash correctly |
| Worn or damaged shift forks - Change the shift forks |
| Transmission fluid leakage |
| Gaskets or seals are broken - Install new components |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system is too hot |
| Hydraulic system pressure is not corrected - The pressure must be adjusted correctly |
| Main relief valve is defective or unadjusted - Adjust relief valve or change if required |
| Hydraulic oil contamination - Change the oil |
| Air leaks in hydraulic system - Check the pump seals, suction line, and fittings |
| Low hydraulic system pressure |
| Lack of hydraulic oil - Add oil to the hydraulic system |
| Hydraulic fluid filter element clogging - Replace filter element or clean if required |
| Defective hydraulic pump - Flow-rate hydraulic pump and replace pump if necessary |
| Hydraulic spool valve is defective or set improper - Adjust correctly or change |
| Defective hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Hydraulic pipes are leaking - Find leaks in the system and fix it |
| Hitch fails to lift or lifts slowly |
| Hydraulic oil level is insufficient - Add oil to the hydraulic system |
| Cold oil in hydraulic system - Wait for oil to warm up |
| Dirty hydraulic oil filter - Service or replace the hydraulic filter |
| Faulty hydraulic oil pump - Test the pump performance and change pump if required |
| Main relief valve malfunction or incorrect adjustment - Set up or change the relief valve |
| Hydraulic spool valve block is defective or set improper - Replace or set correctly |
| Faulty hydraulic cylinder - Check the hydraulic cylinder components for damage or wear and change if necessary |
| Damaged or loose suction line - Tighten or change |
| Hitch drops too slowly or can't drop |
| Hydraulic control valve is not set properly or defective - Adjust properly or change |
| Hydraulic cylinder is broken - Inspect cylinder components for wear or damage and change if required |
| Damaged hitch rock shaft - Install a new shaft |
| The hitch has internal mechanical malfunctions - Replace worn or damaged hitch components |
| Three-point hitch raises or lowers not smoothly |
| Air in hydraulic system - Inspect the pump seals, suction line, and fittings |
| Hydraulic oil contamination - Change the oil |
| Faulty hydraulic oil pump - Flow-rate hydraulic pump and replace pump if necessary |
| Faulty or incorrect setting hydraulic control valve - Adjust properly or replace |
| Broken hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Steering System Troubleshooting |
| Hard Steering |
| Steering column is worn or incorrectly mounted - Change the steering column or mount it correctly |
| Aeration in steering system - Bleed air |
| Steering filter is plugged - Service steering filter |
| Improper toe-in adjustment - Adjust toe-in wheels properly |
| Tires are incorrectly inflated - Inflate as required |
| Steering pump stopped working - Steering pump needs to be replaced or repaired |
| Steering cylinder has wear or malfunction - Inspect and change as required |
| Damaged steering gearbox parts - Defective power steering box components must be replaced |
| Lack of steering fluid - Need to add steering oil |
| Oil leaks in the steering system - Tighten the steering hose and pipe joints |
| Excessive free play of steering wheel |
| Steering column shaft or coupling has maximum wear - Replace defective component |
| Faulty or worn steering cylinder - Replace or repair steering cylinder as required |
| Damaged steering gear box parts - Repair power steering gearbox |
| Steering pump stopped working - Install a new hydraulic steering pump |
| Steering tie-rod ends or linkage are defective - Change failed component |
| Tractor pulls to right or left |
| Tire pressure is low - Tires need to be inflated |
| Incorrect toe-in - Adjust toe-in correctly |
| Worn or faulty steering tie-rod ends or linkage - Change damaged part |
| Faulty steering gear box components - Change defective steering gear box components |
| Damaged steering cylinder - Repair or change hydraulic steering cylinder |
| Front hub bearings are incorrectly adjusted or worn - Adjust correctly or install new bearings |
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| Farm Tractors Technical Specifications |
