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Ford 1720 Tractor Troubleshooting

The Ford 1720 is a Twenty series compact utility tractor. This model was manufactured by Shibaura built from 1987 to 2000. The Ford 1720 tractor is powered by 91.3 cubic inches (1.5 L) Shibaura N843 4-stroke three-cylinder indirect injection water-cooled diesel engine with a maximum power of 27.7 Hp (20.7 kW) at 2500 rev/min. The Ford 1720 is fitted with two types of transmission.

1st type: 12x4 unsynchronized gear transmission. 2nd type: mechanical shuttle transmission with 12 forward and 12 reverse gears. Max. forward speed - 13.4 mph (21.6 kph), maximum reverse speed - 9.2 mph (14.8 kph).

The open center hydraulic system includes a gear pump with fluid flow rate of 7.8 gpm (29.5 lpm). The hydraulic pressure is 2130 psi (147 bar). The 4-wheel drive models are equipped with 7.00x14 or 25x8.5-14 front tires and 11.2x24 or 13.6-16 rear tires. The 5.00x15 or 23x8.5-12 front tires and 11.2x24 or 13.6-16 rear tires are used for tractors with 2-wheel drive. The wheelbase is 65 in (1650 mm). The Ford 1720 is compatible with a 78" front-mount blade, 63" front-mount snowblower, Ford 7108 front end loader with lift capacity to full height of 900 lbs (408 kg), and Ford 757B backhoe.

Engine Troubleshooting
Diesel won't start or hard to start
Dirty fuel filter element - Clean the filter or install new filter element
Closed fuel cock - Open fuel on-off cock to inject fuel
Fuel-line is leaking air - Retighten clamps, replace defective pipes
Clogged fuel injectors - Test fuel injectors and change if necessary
Fuel injection pump is not working correctly - Replace or rebuild injection pump
Low engine compression - Check cylinder block and replace worn parts
Diesel stalls while running
Low coolant temperature - Warm up engine as required
Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system
Improper fuel injection - Fuel injection settings required
Plugged fuel filter - Clean the filter element
Fuel injectors are defective or dirty - Service or change fuel injectors
Engine starts but immediately shuts off
Incorrect setting of fuel injection pump timing - Correct injection timing
Plugged fuel filter - Change filter element
Fuel injector nozzles are damaged or dirty - Inspect injector nozzles and change if required
Fuel injection pump malfunction - Repair or install new pump
Air cleaner element is clogged - Change or service air cleaner element
Engine stops when idle
Incorrectly set low idle speed - Need to adjust idle speed
Fuel injection pump failure - Replace injection pump or repair it
Fuel injector nozzles are defective or dirty - Change or clean injector nozzles
Valve out of adjustment - Adjust valve clearance
Engine overheats
Insufficient coolant - Fill the cooling system. Any leaks must be repaired
Cooling system is clogged or cooling parts are worn - Change faulty components or service cooling system
Engine oil insufficient - Checking oil level and add if necessary
Unadjusted fan belt tension or worn belt - Adjust belt tension properly or change it
Defective thermostat - Thermostat needs to be replaced
Poor engine power
Dirty or faulty injectors - Service or change fuel injectors
Incorrect fuel injection pressure - Test fuel injection pressure and adjust it correctly
Air filter element is clogged - Service or change air filter
Dirty oil filter - Replace or clean engine oil filter element
Engine is under excessive load - Reduce load or shift to lower gear
The valve clearance is incorrect - Adjust valve clearance
Incorrect low idle setting - Adjust low idle speed
Clogged fuel hoses or pipes - Fuel pipes and hoses need to be cleaned
Poor engine compression: Leaking or broken valves - Replace the valves as required
Engine noise or knocking
Incorrectly set fuel injection pump timing - Check and correct settings
Fuel injector nozzles are faulty - Replace fuel injector nozzles
Insufficient engine oil - Check oil level and add oil as required
Engine is cold - Warm up engine to required temperature
Main bearings or crankshaft are worn out - Change or repair worn components
Piston rings are damaged or broken - Have piston rings replaced
Flywheel mounting screws are loose - Tighten the screws
Excessive oil consumption
Oil leaking: Damaged gaskets or seals - Change worn parts according to specifications
Improper oil viscosity - Use oil of correct viscosity
Piston rings are stuck or worn - Install new piston rings
Worn valve stems and valve guides - Valves replacement required
Worn pistons or cylinder liners - Inspect liners and pistons, fit new parts as necessary

Electrical System Troubleshooting
Battery is not charging
Battery is defective - Install a new battery
Damaged battery wiring harness - Inspect wiring for damage, replace or repair
Corroded or loose battery terminals and cables - Tighten or clean cables and terminals
Damaged belt or incorrectly adjusted belt tension - Replace belt or correctly adjust belt tension
Starter turns slowly
Battery voltage is low - Battery needs to be recharged
Battery will not hold charge - Battery needs to be serviced or replaced
Battery wiring harness failure - Inspect electrical cables for defects, repair or replace
Corroded or loose terminals and cables - Tighten or service terminals and cables
Starter will not work
Low battery output voltage - Charge the battery
Discharged or defective battery - Change or recharge battery
Damaged starter motor - Starter should be changed
Wiring is improperly connected or disconnected - Need to reconnect the wiring properly

Transmission Troubleshooting
Difficulty shifting gears
Clutch is not adjusted or faulty - Change or adjust clutch
Gear shift linkage is stuck or damaged - Change defective shift linkage
Shift forks are damaged or worn - Install new shift forks
Gearshift mechanism failure - Change or repair failed components
Transmission oil pressure is low
Insufficient oil supply - Check transmission oil level and add oil as required
Dirty transmission oil filter (if fitted) - Replace or service transmission oil filter
Relief valve sticking - Install a new relief valve
Transmission noise
Bearings are worn or damaged - Bearings replacement required
Fluid level is low - Check transmission fluid level and add it as required
Transmission oil contamination - Fill up with fresh transmission oil
Worn gears or improper backlash - Replace gears or set backlash correctly
Worn or damaged shift forks - Change the shift forks
Transmission oil leaks
Broken gaskets or seals - Install new components
Transmission housing is cracked - Replace housing or transmission assembly

Hydraulics Troubleshooting
Hydraulic system is too hot
Improper hydraulic pressure adjustments - Adjust it correctly
Main relief valve is faulty or misadjusted - Adjust relief valve or change if required
Dirty hydraulic fluid - The fluid must be changed
Air leaks in hydraulic system - Check the pump seals, suction pipe, and fittings
Hydraulic fluid pressure is insufficient
Lack of hydraulic fluid - Need to add fluid
Hydraulic fluid filter element clogging - Clean or change hydraulic filter
Defective hydraulic pump - Check pump performance and change it if necessary
Defective or not adjusted hydraulic spool valve - Adjust correctly or change
Hydraulic cylinder is defective - Inspect cylinder parts for wear or damage and replace if required
Leakage in hydraulic lines - Find leaks in hydraulic system and repair it
Hitch cannot be lifted or lifting is too slow
Lack of hydraulic oil - Fill up the hydraulic oil
Cold fluid in hydraulic system - Wait for fluid to warm up
Hydraulic oil filter clogging - Hydraulic filter maintenance required
Hydraulic pump failure - Check the pump capacity and replace pump if required
Faulty or incorrectly adjusted main relief valve - Adjust the valve or replace if necessary
Hydraulic control valve block is defective or set improper - Adjust correctly or change
Hydraulic cylinder is faulty - Inspect cylinder parts for wear or damage and replace if required
Damaged or disconnected suction pipe - Connect or replace
3-point hitch drops slowly or won't drop
Defective or not adjusted hydraulic control valve - Replace or adjust correctly
Hydraulic cylinder malfunction - Inspect the hydraulic cylinder components for damage or wear and change if required
Hitch rock shaft is damaged - Change the shaft
The hitch has mechanical faults - Replace worn or faulty hitch components
Hitch jerks when lift or lower
Hydraulic system sucks air - Inspect the pump seals, suction pipe, and fittings
Contaminated hydraulic oil - Change hydraulic oil
Hydraulic pump not working - Check pump flow and change pump if necessary
Hydraulic spool valve block is defective or set improper - Adjust properly or replace
Hydraulic cylinder is defective - 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 trapped in the steering system - Bleed the system of air
Improper toe-in adjustment - Adjust toe-in wheels properly
Tires are not properly inflated - Inflate tires as required
Steering pump failure - Repair or replace steering pump
Defective or worn power steering control unit - Inspect and replace as required
Relief valve is seized or worn - Inspect relief valve and replace if necessary
Steering oil insufficient - Check and refill steering oil
Steering system oil leak - Tighten the steering pipe and hose joints
Steering wheel has too much free-play
Worn steering column coupling or shaft - Replace faulty part
Power steering control unit is worn or defective - Check and replace as required
Steering pump failure - Check the hydraulic steering pump and change if necessary
Worn or faulty steering linkage or tie-rod ends - Replace damaged component
Tractor pulls to right or left
Tires are deflated - Need to inflate tires
Incorrect toe-in adjustment - Adjust toe-in properly
Faulty or worn steering tie-rod ends or linkage - Change damaged component
Worn or defective power steering control unit - Replace or repair steering unit as required
Steering cylinder is damaged - Change or repair steering cylinder
Defective or improperly adjusted 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