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Ford 2120 Tractor Troubleshooting

The Ford 2120 compact utility tractor was manufactured by Shibaura built from 1987 to 1991. The Ford 2120 driveline system components: Shibaura T854 four-cylinder water cooled diesel engine and 12x12 hydraulic shuttle shift transmission (HSS), or unsynchronized gear transmission with 12 forward and 4 reverse gears.

A 138.4 cubic inches (2.27 L) engine has a cylinder bore of 3.35" (85 mm), piston stroke of 3.94" (100 mm), and rated power of 42.6 hp (31.8 kW). Max. forward speed - 15 mph (24.2 km/h), maximum reverse speed - 14 mph (22.4 km/h).

The open center hydraulic system includes a gear pump with rated fluid flow of 9.3 (35.2) liters per minute. The main relief pressure is 2130 psi (147 bar). The 2-wheel drive models are equipped with 6.00x16 (AG) or 25x8.50-14 (Turf) front tires and 13.6x28 (AG) or 14.9x26 (Turf) rear tires. The 8.00x18 (AG) or 27x8.50-15 (Turf) front tires and 13.6x28 (AG) or 18.4x16.1 (Turf) rear tires are used for tractors with 4-wheel drive. The wheel base is 74.8 inches (1890 mm). Compatible attachments for the Ford 2120 tractor: a 84" front-mount blade, Ford 758B backhoe, and Ford 7109 front end loader with lift capacity to maximum height of 1800 lbs (816 kg).

Engine Troubleshooting
Engine hard starting or not starting
Fuel filter clogging - Clean or replace the filter
Fuel shut-off valve closed - Open the fuel shut-off valve
Air in fuel pipes - Bleed fuel pipes
Clogged or damaged injectors - Change fuel injectors
Fuel injection pump damage - Repair or install new pump
Poor engine compression - Inspect cylinder block and change damaged parts
Engine shuts off while driving
Low coolant temperature - Warm up the engine
Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system
Improper fuel injection - Fuel injection settings required
Dirty fuel filter element - Change the filter element
Dirty or damaged injectors - Service or change fuel injectors
Engine starts and stalls immediately
Incorrectly set fuel injection pump timing - Check and correct adjustments
Dirty fuel filter element - Replace the filter element
Fuel injector nozzles are faulty - Service or replace injector nozzles
Fuel injection pump failure - Change or repair the pump
Dirty air cleaner element - Replace cleaner or install new cleaner element
Engine stalls while idling
Improperly adjusted low idle speed - Normalize low idle speed
Fuel injection pump failure - Change or repair the pump
Fuel injector nozzles are clogged or faulty - Install new set of properly balanced nozzles
Incorrect valve clearance - Need to adjust valve clearance
Engine is overheated
Lack of engine coolant - Coolant needs to be refilled. Repair any leaks if necessary
Cooling system components are worn or system is clogged - Change faulty components or service cooling system
Low engine oil level - Check and refill engine oil
Worn fan belt or improper belt tension - Adjust belt tension correctly or replace it
Thermostat is defective - Check and change if necessary
Diesel engine is losing power
Clogged or damaged injectors - Check fuel injectors and replace if required
Improper fuel injection pressure - Check the fuel injection pressure and adjust if necessary
Air filter is dirty - Install new filter element or replace it
Plugged engine oil filter - Service or replace engine oil filter
Diesel engine overloaded - Load reducing required
Valve clearance is not correct - Check and adjust as required
Too low idle RPM - Adjust the low idle speed
Fuel pipes or hoses are dirty - Clean fuel system pipes and hoses
Lack of compression: Inlet or outlet valves are defective - Have valves replaced
Engine noise or knocking
Timing of fuel injection pump is wrong - Fuel injection pump timing adjustment needs to be corrected
Fuel injector nozzles are damaged or dirty - Change or clean injector nozzles
Not enough engine oil - Fill the crankcase with engine oil
Engine not warmed up - Warm up engine to required temperature
Worn main bearings or crankshaft - Worn parts replacement required
Worn or broken piston rings - Install new piston rings
Flywheel bolts are loose - Bolts need to be tightened
Engine oil consumption is too high
Oil leaking: Worn seals or gaskets - Defective components must be replaced
Improper oil viscosity - Fill up with the proper oil viscosity
Worn or stuck piston rings - Change the piston rings as required
Valve guides or stems are damaged - Need to replace the valves
Scuffed cylinder liners or pistons - Inspect pistons and liners, replace as required

Electrical System Troubleshooting
Battery will not charge
Battery failing - Install a new battery
Battery electrical wire harness damage - Check battery wires for damage, replace or change
Battery terminals and cables are loose or corroded - Cables and terminals must be tightened or cleaned
Damaged belt or incorrectly adjusted belt tension - Change belt or adjust belt tension properly
Starter cranks slow
Battery capacity is low - Low battery charging, charge as required
Battery drains quickly - Service or replace the battery
Battery wiring harness failure - Inspect electrical cables for defects, repair or replace
Battery cables and terminals are loose or corroded - Service or tighten battery terminals and cables
Starter is not working
Low battery output voltage - Low battery charging, charge as required
Discharged or faulty battery - Replace or charge as required
Starter motor failing - Repair or install a new starter
Incorrectly connected or disconnected wires - Check battery wires and connect correctly

Transmission Troubleshooting
Hard shifts
Failure or improper clutch adjustment - Adjust or replace the clutch
Gear shift linkage is damaged or loose - Change defective shift linkage
Shift forks are damaged or worn - Change the shift forks
Faulty parts in the gear shifting mechanism - Change faulty parts
Low transmission pressure
Fluid level is low - Fill the transmission housing with fluid
Transmission fluid filter clogging (if fitted) - Change or clean the transmission fluid filter
Faulty relief valve - Replace valve as required
Transmission makes noise
Damaged or worn bearings - Bearings need to be changed
Low transmission oil level - Correct the transmission oil level
Transmission oil contamination - Change transmission oil
Backlash is incorrect or gears are worn - Change worn gears or set backlash correctly
Damaged or worn shift forks - Replace the shift forks
External fluid leaks
Gaskets or seals are defective Change defective seal or gaskets
Transmission housing is cracked - Replace housing or transmission assembly

Hydraulics Troubleshooting
Hydraulic system overheated
Hydraulic system pressure is incorrect - Hydraulic pressure needs to be set correctly
Faulty or incorrectly adjusted main relief valve - Adjust or change relief valve
Hydraulic oil is dirty - Hydraulic oil change required
Air trapped in the hydraulic system - Check the pump seals, suction pipe, and fittings
Hydraulic fluid pressure is insufficient
Hydraulic fluid level is insufficient - Check and refill the hydraulic fluid
Hydraulic oil filter clogging - Service or replace the hydraulic filter
Hydraulic pump is defective - Check pump performance and change it if necessary
Hydraulic control valve is defective or set improper - Adjust properly or replace
Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required
Hydraulic piping leaks - Find leaks in the system and fix it
3-point hitch lifts too slowly or can't lift
Hydraulic fluid level is insufficient - Check and refill the hydraulic fluid
Cold hydraulic fluid - Warm up the fluid
Hydraulic fluid filter is clogged - Clean or replace the hydraulic filter
Hydraulic pump is defective - Test the pump flow rate and install new pump if required
Main relief valve is damaged or adjusted improperly - Adjust the valve or replace if necessary
Hydraulic control valve is faulty or out of adjustment - Set correctly or replace
Hydraulic cylinder malfunction - Check the hydraulic cylinder components for damage or wear and change if necessary
Suction line is damaged or disconnected - Connect or replace
3-point hitch lowers slowly or won't lower
Hydraulic control valve block is faulty or out of adjustment - Adjust correctly or replace
Defective hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required
Hitch rock shaft is damaged - Replace the shaft
Defective mechanical parts of the hitch - Replace faulty or worn hitch components
Hitch lower or lift is jerky
Aeration in hydraulic system - Inspect the pump seals, suction pipe, and fittings
Dirty hydraulic fluid - The fluid must be changed
Faulty hydraulic oil pump - Test pump flow rate and replace pump if required
Damaged or incorrect adjusted hydraulic spool valve - Adjust properly or replace
Hydraulic cylinder is broken - Check cylinder parts for wear or damage and replace if necessary

Steering System Troubleshooting
Steering is hard
Damaged or improperly installed steering column - Reinstall or replace the steering column
Aeration in steering system - Bleed air from system
Toe-in adjustment is incorrect - Adjust toe-in correctly
Tire pressure is improper - Inflate the tires properly
Steering pump is worn - Check the hydraulic steering pump and change if necessary
Steering cylinder is worn or defective - Repair or change the steering cylinder
Damaged steering gearbox parts - Change defective steering gear box components
Low steering oil level - Fill up the steering oil
Steering system oil leakage - Tighten the steering hose and line joints
Excessive free play of steering wheel
Steering column shaft or coupling is worn out - Change faulty part
Faulty or worn steering cylinder - Replace or repair steering cylinder as required
Worn steering box parts - Defective power steering box components must be replaced
Steering pump stopped working - Check the steering pump and replace if necessary
Faulty or worn steering tie-rod ends or linkage - Replace damaged component
Tractor pulls to left or right
Deflated front tyres - Inflate tyres as needed
Incorrect toe-in - Adjust toe-in correctly
Faulty or worn steering linkage or tie-rod ends - Replace damaged part
Worn steering gear box components - Change defective steering box parts
Steering cylinder is faulty - Repair or replace steering cylinder
Damaged or improperly adjusted or worn front hub bearings - Adjust correctly or install new bearings




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