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Kubota B1220 Troubleshooting
The
4-wheel drive Kubota B1220 compact utility tractor was manufactured from 2009 to
2018. The Kubota B1220 powertrain system components: a 29.2 cu.in (0.46 L)
Kubota Z482 vertical two-cylinder liquid-cooled diesel engine and gear shift
transmission with 6 forward and 2 reverse gears. The engine has a cylinder bore
of 2.64" (67 mm), piston stroke of 2.68" (68 mm), and rated power of 10.7 hp
(7.9 kW).
The maximum travel speed (forward/reverse): 10.6 mph (17 kph) and 6.9
mph (4.3 kph). The open center hydraulic system has a gear pump with a
rated capacity of 2.2 gal/min (8.2 l/min). The hydraulic pressure is 89
bar (1290 psi). The Kubota B1220 is equipped with a manual steering
system, wet disc brakes, 5.00x12 front tires, and 8.00x16 rear tires.
| Engine Troubleshooting |
| Engine doesn't start or hard to start |
| Dirty fuel filter element - Filter maintenance required |
| Closed fuel supply valve - Open supply valve to inject fuel |
| Air trapped in fuel system - Bleed air |
| Fuel injectors are clogged or faulty - Inspect fuel injectors and replace if necessary |
| Fuel injection pump is defective - Replace or rebuild injection pump |
| Bad cylinder compression - Check cylinder block and change worn components |
| Engine stops during operation |
| Low coolant temperature - Normalize the engine temperature |
| Air in fuel lines - Bleed fuel lines |
| Improper fuel injection - Fuel injection settings required |
| Dirty fuel filter element - Service the filter |
| Clogged fuel injectors - Inspect fuel injectors and replace if necessary |
| Engine starts and stalls immediately |
| Fuel injection pump out of timing - Repair or replace fuel injection pump |
| Fuel filter clogging - Clean or replace the filter |
| Fuel injector nozzles are damaged or dirty - Replace fuel injector nozzles |
| Fuel injection pump is damaged - Repair or install new pump |
| Air cleaner is clogged - Change or replace air cleaner element |
| Engine stalls while idling |
| Incorrect low idle speed adjustment - Correct low idle adjustment |
| Damaged fuel injection pump - Replacement or repair required |
| Damaged or clogged injector nozzles - Service or replace injector nozzles |
| Valve out of adjustment - Adjust valve clearance according to specifications |
| Not enough coolant - Fill radiator to proper level. Check the components of cooling system |
| Cooling system parts are failed or system is clogged - Service the cooling system or change faulty parts |
| Insufficient engine oil - Fill up the engine oil |
| Worn fan belt or unadjusted belt tension - Adjust correctly or replace the belt |
| Thermostat malfunction - Thermostat needs to be replaced |
| Diesel engine is losing power |
| Fuel injectors are clogged or faulty - Check fuel injectors and replace if required |
| Fuel injection pressure is incorrect - Adjust to correct pressure |
| Air filter element clogging - Clean or replace the air filter element |
| Clogged oil filter element - Replace or service engine oil filter |
| Diesel engine overloaded - Reduce the load or use a lower gear |
| Valve clearance is out of adjustment - Check and adjust |
| Incorrectly adjusted low idle speed - Need to adjust idle speed |
| Fuel hoses or pipes are clogged - Service fuel pipes and hoses |
| Low engine compression: Worn or damaged valves - Change the valves |
| Fuel injection pump out of timing - Repair or replace fuel injection pump |
| Fuel injector nozzles fault - Service or replace injector nozzles |
| Engine oil level is low - Add oil to the engine crankcase |
| Engine is cold - Warm up engine to required temperature |
| Worn main bearings or crankshaft - Change defective components as required |
| Damaged or defective piston rings - Have piston rings replaced |
| The flywheel to crankshaft bolts are loose - Tighten bolts as required |
| Engine using too much oil |
| External oil leaks: Damaged seals or gaskets - Install new components |
| Wrong oil viscosity - Use correct viscosity oil |
| Stuck or worn piston rings - Install new piston rings |
| Damaged valve stems or valve guides - Need to replace the valves |
| Pistons or cylinder liners are scored - Inspect pistons and liners, fit new components as necessary |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Faulty cell in battery - Battery replacement required |
| Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair |
| Battery cables and terminals are corroded or loose - Clean or tighten terminals and cables |
| Belt is worn or belt tension is incorrectly adjusted - Adjust belt tension properly or change belt |
| Low battery output voltage - Battery is drained, recharge it |
| Battery discharges quickly - Service or replace the battery |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Corroded or loose terminals and cables - Service or tighten battery cables and terminals |
| Starter motor is not working |
| Low battery output - Low battery charging, charge as required |
| Drained or worn battery - Charge or replace the battery |
| Starter motor is damaged - Repair or change starter |
| Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly |
| Transmission Troubleshooting |
| Hard shifts |
| Misadjusted or defective clutch - Clutch needs to be adjusted or changed |
| Gear shift linkage is stuck or worn - Change or repair shift linkage |
| Bent or worn shift forks - Change defective shift forks |
| Faulty parts in the gear shifting mechanism - Change faulty parts |
| Low transmission pressure |
| Low transmission fluid level - Fill up the transmission fluid |
| Transmission fluid filter is dirty (if equipped) - Replace or clean transmission fluid filter |
| Faulty relief valve - Change relief valve |
| Transmission is excessively noisy |
| Bearings are worn or cracked - Change the bearings |
| Not enough fluid in transmission - Fill up the transmission fluid |
| Transmission fluid contamination - Fill up with fresh transmission fluid |
| Backlash is incorrect or gears are worn - Change the gears or adjust backlash correctly |
| Bent or worn shift forks - Replace the shift forks |
| Transmission fluid leaking |
| Gaskets or seals are damaged - Install new components |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system overheats |
| Improper pressure in hydraulic system - Adjust properly |
| Main relief valve is damaged or adjusted improperly - Set up or change the relief valve |
| Contaminated hydraulic fluid - Change hydraulic fluid |
| Air enters in hydraulic system - Inspect the suction line, pump seals, and fittings |
| Low hydraulic system pressure |
| Not enough hydraulic fluid in the system - Need to add fluid |
| Hydraulic oil filter element clogging - Replace hydraulic filter element or service if necessary |
| Damaged hydraulic oil pump - Check pump capacity and change if necessary |
| Hydraulic spool valve is not set properly or defective - Change or set correctly |
| Defective hydraulic cylinder - Inspect cylinder parts for wear or damage and replace if required |
| Hydraulic lines are leaking - Identify leaks in the system and repair it |
| Hitch cannot be raised or raising is too slowly |
| Lack of hydraulic fluid - Fill the hydraulic system with oil |
| Cold oil in hydraulic system - Wait for oil to warm up |
| Hydraulic fluid filter element is dirty - Service the hydraulic filter or change if required |
| Defective hydraulic pump - Flow-rate pump and change pump if necessary |
| Misadjusted or defective main relief valve - Adjust or replace the relief valve |
| Faulty or incorrect setting hydraulic spool valve - Change or set correctly |
| Hydraulic cylinder is defective - Check cylinder parts for wear or damage and replace if necessary |
| Suction line is damaged or disconnected - Connect or replace |
| Hitch can't drop or drops too slowly |
| Defective or not adjusted hydraulic spool valve - Change or adjust properly |
| Hydraulic cylinder is faulty - Inspect cylinder parts for wear or damage and replace if required |
| Lift arm shaft is worn - Install a new shaft |
| Mechanical components of the hitch are defective - Replace faulty or worn hitch components |
| Hitch is lowered or raised jerkily |
| Air trapped in the hydraulic system - Inspect the suction line, pump seals, and fittings |
| Hydraulic oil contamination - Change the oil |
| Hydraulic pump not working - Test the pump flow rate and change pump if required |
| Hydraulic spool valve block is defective or set improper - Replace or adjust correctly |
| Defective hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary |
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| Farm Tractors Technical Specifications |
