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Ford 1520 Tractor Troubleshooting

The Ford 1520 is a 2-wheel drive or 4-wheel drive compact utility tractor from twenty compact series. This model was manufactured by Shibaura built between 1987 and 1998.

The Ford 1520 driveline includes a Shibaura J843 three-cylinder liquid cooled diesel engine, and 9x3 gear transmission or 3-range hydrostatic transmission. A 81.2 cu.in (1.32 L) engine output rating is 24 hp (17.9 kW) at 2500 rpm. Max. forward speed - 12.8 mph (20.6 kph), max. reverse speed - 7.2 mph (11.6 kph).

The open center hydraulic system includes a gear pump with a rated capacity of 6.4 gpm (24.2 lpm). The main relief pressure is 147 bar (2130 psi). The 4WD models are equipped with 6.00-14 or 25x8.5-14 front tyres and 13.6-16 rear tyres. The 5.00-15 or 23x8.5-12 front tyres and 9.50-24 rear tyres fit 2WD tractors. The wheelbase is 63" (1600 mm).

The Ford 1520 tractor is compatible with the following attachments: a 60" mid-mount mower deck, 78" front-mount blade, 63" front-mount snow blower, Ford 7108 front end loader, and Ford 757B backhoe.

Engine Troubleshooting
Engine won't start or difficult to start
Fuel filter plugging - Service the filter
Fuel is not supplied from the tank to the system - Check the fuel shut-off valve
Air in fuel pipes - Bleed fuel pipes
Dirty or damaged injectors - Service or change fuel injectors
Fuel injection pump is defective - Change or repair the pump
Low cylinder compression - Check cylinder block and change faulty parts
Engine stalls while running
Engine is cold - Warm up engine to required temperature
Air trapped in fuel system - Bleed air
Bad fuel injection - Check and adjust
Fuel filter clogging - Replace filter element
Fuel injectors are clogged or faulty - Test fuel injectors and change if necessary
Engine starts but immediately stops
Fuel injection pump out of timing - Repair or replace fuel injection pump
Clogged fuel filter element - Change the filter element
Clogged or defective injector nozzles - Service or replace injector nozzles
Fuel injection pump failure - Replace injection pump or repair it
Air cleaner is clogged - Clean or replace the air cleaner element
Engine stops at idle
Improperly adjusted low idle speed - Correct low idle adjustment
Damaged fuel injection pump - Repair or change injection pump
Clogged or defective injector nozzles - Service or replace nozzles if required
The valve clearance is not adjusted - Correct valve clearance
Engine overheated
Coolant level is low - Coolant needs to be refilled. Inspect the system for leaks
Cooling system parts are worn or system is clogged - Flush cooling system or change faulty components
Engine oil level is insufficient - Fill the crankcase with engine oil
Broken fan belt or incorrect belt tension - Adjust correctly or replace the belt
Thermostat fault - Install new thermostat
Lack of engine power
Clogged or damaged injectors - Service or change fuel injectors
Incorrect fuel injection pressure - Adjust pressure to proper level
Air filter clogging - Service or replace the air filter
Clogged oil filter - Clean or change engine oil filter
Diesel engine is overloaded - Reduce load or shift to lower gear
Excessive valve clearance - Check and adjust
Wrong adjustment of low idle speed - Adjustment required
Fuel pipes or hoses clogging - Clean fuel pipes and hoses
Engine compression is insufficient: Valves are defective or worn - Valve replacement required
Engine knocking sound or abnormal noise
Incorrectly set fuel injection pump timing - Check and correct adjustments
Fuel injector nozzles are dirty - Install a new set of well-balanced nozzles
Low engine oil level - Need to add engine oil
Engine not warmed up - Warm up the engine
Crankshaft or main bearings are worn out - Repair or replace defective parts
Broken or defective piston rings - Have piston rings replaced
Flywheel mounting screws are loose - Tighten the screws
Excessive engine oil consumption
Oil leaking: Seals or gaskets are defective - Worn parts need to be replaced
Improper oil viscosity - Use oil of correct viscosity
Seized or wear piston rings - Change the piston rings as required
Damaged valve guides or valve stems - Replace defective valves
Scored pistons or cylinder liners - Check liners and pistons, replace as required

Electrical System Troubleshooting
Battery is not charging
Faulty cell in battery - Battery change required
Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair
Battery cables and terminals are corroded or loose - Tighten or service cables and terminals
Belt wear or improper belt tension adjustment - Adjust belt tension properly or replace belt
Starter turning slow
Low battery output voltage - Recharge the battery
Battery does not hold charge - Service charging system or change battery
Battery electrical wire harness failure - Inspect wires for defects, change or repair
Loose or corroded battery terminals and cables - Cables and terminals must be tightened or cleaned
Starter motor is not working
Low battery power - Recharge the battery
Drained or faulty battery - Charge or replace the battery
Defective starter motor - Starter should be changed
Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly

Transmission Troubleshooting
Gear hard to shift
Worn or misadjusted clutch - Clutch needs to be adjusted or changed
Gear shift linkage is loose or broken - Change defective shift linkage
Damaged or worn shift forks - Replace defective shift forks
Gearshift mechanism failure - Change or repair failed components
Transmission oil pressure is insufficient
Low transmission oil level - Fill up the transmission oil
Transmission fluid filter element is dirty (if fitted) - Change or clean the transmission fluid filter
Faulty relief valve - Replace valve as required
Excessive transmission noise
Damaged or worn bearings - Replace faulty bearings
Insufficient oil supply - Fill up the transmission oil
Contaminated transmission fluid - Change transmission fluid
Gears are worn or backlash is improper - Set backlash correctly or change the gears
Damaged or worn shift forks - Install new shift forks
Transmission fluid leaks
Worn gaskets or seals - Seals and gaskets need to be replaced
Cracked transmission case - Install a new transmission case

Hydrostatic Transmission Troubleshooting
Hydrostatic transmission is making noise
Transmission fluid level is insufficient or fluid is contaminated - Fill the transmission with fresh fluid or add fluid to the correct level
Damaged or not adjusted speed control rod linkage - Adjust or replace control rod linkage
Faulty relief valve - Replace relief valve
Excessive transmission load - Reduce transmission load
Transmission components are worn or damaged - Replace or repair worn components
Transmission oil over heats
Oil level is insufficient - Add transmission oil as required
Transmission fluid filter clogging - Replace or clean transmission fluid filter
Cooling components are plugged or defective - Check all cooling components and change or clean if required
Excessive transmission load - Reduce the load is required
Lack of power
Low transmission fluid level - Fill up the transmission fluid
Charge pressure is insufficient - Check charge pressure
Defective or worn relief valve - Change relief valve
External oil leaks
Seals or gaskets are damaged - Gaskets or seal replacement required
Transmission housing internal pressure is excessive - Repair or replace worn parts
Oil return pipe is clogged - Check pipe and clean if necessary

Hydraulics Troubleshooting
Excessive hydraulic system heat
Incorrect hydraulic pressure adjustments - Adjust correctly
Defective or misadjusted main relief valve - Adjust or change relief valve
Hydraulic fluid is contaminated - Fill up with new hydraulic fluid
Air leaks in hydraulic system - Inspect the suction line, pump seals, and fittings
Hydraulic oil pressure too low
Hydraulic fluid level is insufficient - Fill the hydraulic system with oil
Hydraulic oil filter is dirty - Clean the hydraulic filter element or replace if necessary
Defective hydraulic pump - Check pump flow and install new pump if necessary
Hydraulic spool valve block is not set properly or defective - Replace or set properly
Broken hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Hydraulic piping leaks - Detect leaks in hydraulic system and repair it
3-point hitch lifts too slowly or can't lift
Not enough hydraulic fluid in the system - Need to add fluid
Hydraulic fluid is too cold - Allow fluid to warm
Hydraulic fluid filter is clogged - Change the hydraulic filter element or service if required
Faulty hydraulic oil pump - Flow-rate pump and change pump if necessary
Main relief valve is damaged or adjusted improperly - Adjust or replace the relief valve
Hydraulic control valve is defective or set improper - Replace or adjust correctly
Hydraulic cylinder is faulty - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Disconnected or damaged suction pipe - Connect or replace
3-point hitch won't drop or drops slowly
Defective or incorrect setting hydraulic spool valve block - Adjust correctly or replace
Hydraulic cylinder is defective - Check the cylinder components for damage or wear and change if necessary
Damaged lift arm shaft - Install a new shaft
The hitch is defective if there is internal mechanical damage - Replace worn or defective hitch components
3-point hitch lift or lower is jerky
Hydraulic system sucks air - Check the suction pipe, fittings, and pump seals
Contaminated hydraulic fluid - Change hydraulic fluid
Faulty hydraulic oil pump - Test pump flow rate and replace pump if required
Hydraulic control valve block is defective or set improper - Adjust correctly or change
Hydraulic cylinder is defective - Inspect cylinder parts for wear or damage and replace if required

Steering System Troubleshooting
Steering is hard
Defective or incorrectly installed steering column - Reinstall the steering column or change it
Air trapped in the steering system - Need to bleed air
Incorrect toe-in - Adjust toe-in correctly
Tires are deflated - Need to inflate tires
Steering pump not working - Repair or change steering pump
Damaged or worn power steering control unit - Change or repair steering unit if required
Relief valve is faulty or stuck - Replace or install new relief valve
Steering fluid level is low - Check fluid level and add steering fluid as required
Steering system has oil leaks - Retighten steering hose and pipe connections
Excessive free play of steering wheel
Worn steering column coupling or shaft - Replace defective part
Worn or defective power steering control unit - Replace or repair steering unit as required
Hydraulic steering pump is defective - Install a new hydraulic steering pump
Steering linkage or tie-rod ends are worn - Replace failed part
Front wheels wander to left or right
Tire pressure is improper - Inflate the tires properly
Improper toe-in adjustment - Adjust toe-in wheels properly
Faulty or worn steering linkage or tie-rod ends - Replace damaged component
Power steering control unit is worn or defective - Repair or replace the steering unit
Steering cylinder damage - Repair or change steering cylinder
Worn or incorrectly adjusted or worn front hub bearings - Change or adjust the bearings properly




Farm Tractors Technical Specifications
JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294