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Ford 3930 Tractor Troubleshooting
The
Ford 3930 utility tractor was manufactured from 1990 to 2002. The Ford 3930
tractor is powered by Ford vertical 3-cylinder direct injection liquid-cooled
diesel engine. The 201 cubic inches (3.3 L) engine has a cylinder bore of 4.4"
(112 mm), piston stroke of 4.4" (112 mm), and rated power of 51 hp (37.8 kW).
The Ford 3930 is fitted with 3 types of transmission. Type 1: 8x2
Dual-Range transmission. Type 2: 8x8 synchronized shuttle transmission.
Type 3: Dual Power transmission with 16 forward and 8 reverse gears. The
maximum forward speed - 18.5 mph (29.8 kph), maximum reverse speed - 8.9
mph (14.3 kph).
The open center hydraulic system used a pump with rated fluid flow of
7.7 gal/min (29.2 l/min). The hydraulic system pressure is 2500 psi (173
bar). The Ford 3930 was equipped with a power steering system,
differential wet disc brakes, 6.00x15 front tires, and 13.6x28 rear
tires. The wheel base is 84.5" (2140 mm) for models with 2WD and 84.1"
(2130 mm) for models with 4WD.
Compatible attachments for the tractor: Ford 7210 loader with a maximum
lift height of 124" (3140 mm), Ford 7310 loader with lift capacity to
max height of 2685 lbs (1217 kg), or Ford 7410 loader with lift capacity
to full height of 2500 lbs (1134 kg).
| Engine Troubleshooting |
| Engine won't start or difficult to start |
| Fuel filter is dirty - Filter maintenance required |
| The fuel shut-off valve is closed - Open fuel shut-off valve |
| Air in fuel system - Air-bleed fuel system |
| Clogged or damaged injectors - Check fuel injectors and replace if required |
| Fuel injection pump is defective - Install a new fuel pump or repair |
| Low compression - Check cylinder block and replace worn parts |
| Engine stops during operation |
| Engine not warmed up - Normalize the engine temperature |
| Air in fuel pipes - Bleed fuel pipes |
| Bad fuel injection - Check and adjust |
| Fuel filter is clogged - Clean or replace the filter |
| Fuel injectors are defective or dirty - Service or change fuel injectors |
| Engine starts and stalls immediately |
| Fuel injection pump out of timing - Check the fuel injection pump timing setting |
| Clogged fuel filter element - Clean or change the filter |
| Fuel injector nozzles are clogged or faulty - Service or replace injector nozzles |
| Faulty fuel injection pump - Change pump or rebuild it |
| Air cleaner element is dirty - Service or change air cleaner |
| Incorrectly adjusted low idle speed - Adjust low idling as recommended |
| Fuel injection pump failure - Repair or replace injection pump |
| Clogged or defective injector nozzles - Test injector nozzles and replace as required |
| Valve clearance is wrong - Adjust valve clearance |
| Not enough coolant - Coolant needs to be refilled. Inspect the system for leaks |
| Cooling system components are defective or system is dirty - Change faulty components or flush the cooling system |
| Insufficient engine oil - Add oil to the engine crankcase |
| Broken fan belt or improper belt tension - Adjust correctly or change the belt |
| Defective thermostat - Check and change if necessary |
| Clogged fuel injectors - Change fuel injectors |
| Improper fuel injection pressure - Adjust to proper pressure |
| Air filter element clogging - Replace filter or install new filter element |
| Clogged oil filter element - Clean or replace engine oil filter element |
| Diesel engine overloaded - Load reducing is recommended |
| Excessive valve clearance - Adjust valve clearance |
| Low idle speed setting is not correct - Adjust as required |
| Dirt in the fuel pipes or hoses - Service fuel pipes and hoses |
| Low engine compression: Leaking or faulty valves - Valves need to be replaced |
| Timing of fuel injection pump is not adjusted - Adjust the fuel injection pump timing correctly |
| Fuel injector nozzles fault - Test injector nozzles and replace as required |
| Engine oil level low - Fill the crankcase with engine oil |
| Low coolant temperature - Warm up engine as required |
| Main bearings or crankshaft failure - Change or repair worn components |
| Piston rings are defective or broken - Replace the piston rings as required |
| Flywheel mounting screws are loose - Tighten the screws |
| Diesel engine using too much oil |
| Oil leaking: Gaskets or seals can be faulty - Install new components |
| Crankcase oil too light - Use correct viscosity oil |
| Piston rings are stuck or worn - Change piston rings |
| Worn valve stems and valve guides - Install new valves |
| Cylinder liners or pistons are scored - Check liners and pistons, replace as required |
| Electrical System Troubleshooting |
| Battery is not charging |
| Battery bad cell - Install a new battery |
| Battery wiring harness failure - Inspect electrical cables for defects, repair or replace |
| Loose or corroded battery terminals and cables - Cables and terminals must be tightened or cleaned |
| Belt is worn or belt tension is incorrectly adjusted - Replace belt or correctly adjust belt tension |
| Low battery power - Recharge the battery |
| Battery is not holding charge - Service charging system or replace battery |
| Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair |
| Loose or corroded battery terminals and cables - Tighten or clean cables and terminals |
| Battery capacity is low - Battery is drained, recharge it |
| Drained or worn battery - Charge or replace the battery |
| Starter motor failing - Starter needs to be changed |
| Cables harness is improperly connected or disconnected - Inspect cables harness and reconnect it properly |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Worn or misadjusted clutch - Adjust clutch or replace if required |
| Loose or broken gear shift linkage - Change defective shift linkage |
| Shift forks are worn or damaged - Change defective shift forks |
| Defective gearshift mechanism - Replace defective components |
| Low transmission oil pressure |
| Oil level is low - Fill the transmission housing to proper oil level |
| Clogged transmission oil filter (if equipped) - Change or service the transmission oil filter |
| Faulty relief valve - Replace relief valve as required |
| Transmission is excessively noisy |
| Broken or worn bearings - Bearings need to be changed |
| Oil level is low - Checking transmission oil level and add if necessary |
| Contaminated transmission oil - Transmission oil must be changed |
| Improper backlash or damaged gears - Replace gears or set backlash properly |
| Shift forks are worn or damaged - Shift forks need to be changed |
| Broken gaskets or seals - Replace worn seal or gaskets |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system overheats |
| Improper pressure in hydraulic system - Adjust properly |
| Main relief valve failure or incorrect setting - Adjust the valve or replace if necessary |
| Contaminated hydraulic oil - Change hydraulic oil |
| Aeration in hydraulic system - Inspect the pump seals, suction pipe, and fittings |
| Hydraulic oil pressure is insufficient |
| Not enough hydraulic fluid in the system - Check and refill the hydraulic fluid |
| Hydraulic oil filter element is dirty - Replace hydraulic filter element or service if necessary |
| Faulty hydraulic oil pump - Check the pump capacity and replace pump if required |
| Hydraulic control valve is faulty or out of adjustment - Adjust properly or replace |
| Hydraulic cylinder is faulty - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Leakage in hydraulic pipes - Inspect hydraulic system for leaks and repair it |
| Three-point hitch lifting is too slow or cannot be lifted |
| Lack of hydraulic fluid - Need to add fluid |
| Hydraulic fluid is too cold - Allow fluid to warm |
| Hydraulic fluid filter clogging - Change the hydraulic filter element or service if required |
| Hydraulic pump is faulty - Check the pump capacity and replace pump if required |
| Misadjusted or defective main relief valve - Adjust or change relief valve |
| Damaged or incorrect adjusted hydraulic spool valve - Replace or set properly |
| Broken hydraulic cylinder - Inspect cylinder parts for wear or damage and replace if required |
| Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe |
| Hitch does not lower or lowers very slowly |
| Faulty or incorrect setting hydraulic spool valve - Change or adjust correctly |
| Hydraulic cylinder is not working - Check cylinder components for wear or damage and change if necessary |
| Worn lift arm shaft - Change the shaft |
| Internal mechanical failure of the hitch - Replace worn or defective hitch parts |
| Hitch jerks when drop or lift |
| Aeration in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Dirty hydraulic oil - The oil must be changed |
| Hydraulic pump not working - Check pump capacity and change if necessary |
| Hydraulic control valve block is faulty or out of adjustment - Change or adjust properly |
| Hydraulic cylinder malfunction - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Steering System Troubleshooting |
| Stiff steering |
| Damaged or improperly installed steering column - Reinstall or replace the steering column |
| Air leaks in steering system - Bleed the steering system |
| Dirty steering filter element - Service steering filter |
| Not adjusted toe-in - Check toe-in and correct |
| Front tires are worn out - Install new tires |
| Steering pump malfunction - Install a new hydraulic steering pump |
| Worn or damaged power steering control unit - Inspect and replace as required |
| Relief valve is stuck or worn - Replace or service relief valve |
| Insufficient steering fluid - Fill up the steering fluid |
| Steering system oil leak - Retighten joints of the hydraulic steering pipes and hoses |
| Excessive play in steering |
| Steering column coupling or shaft is extremely worn out - Change defective component |
| Damaged or worn power steering control unit - Change or repair steering unit if required |
| Steering pump is faulty - Steering pump needs to be repaired or replaced |
| Worn or faulty steering linkage or tie-rod ends - Change damaged component |
| Tractor is pulling to left or right |
| Deflated front tyres - Inflate tyres as needed |
| Incorrect toe-in adjustment - Adjust toe-in wheels properly |
| Steering linkage or tie-rod ends are worn - Replace damaged part |
| Worn or defective power steering control unit - Repair or change the steering unit |
| Steering cylinder is defective - Replace or repair hydraulic steering cylinder |
| Defective or improperly adjusted front hub bearings - Adjust properly or change bearings |
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| Farm Tractors Technical Specifications |
