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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 |