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Kubota B1620 Troubleshooting
The
Kubota B1620 is a 2WD or 4WD compact utility tractor. This model was
manufactured between 2009 and 2017. The Kubota B1620 tractor is powered by 43.9
cu.in (0.72 L) Kubota D722 4-cycle vertical 3-cylinder water-cooled diesel
engine with a rated power of 13.9 hp (10.3 kW) at 2800 rpm. The tractor is
fitted with a gear shift transmission with 6 forward and 2 reverse gears. The
maximum forward speed - 11.9 mph (19 km/h), maximum reverse speed - 4.4 mph (7
km/h).
The open center hydraulic system has a gear pump with a rated capacity
of 3.7 gal/min (14.1 l/min). The hydraulic system pressure is 120 bar
(1740 psi). The Kubota B1620 is equipped with a manual steering system,
wet disc brakes, 5.0x12 front tyres, and 8.0x16 rear tyres. The
wheelbase is 50.2 inches (1270 mm). The tractor is compatible with
Kubota LA213 front-end loader with a lift capacity to full height of 665
lbs (302 kg) and breakout force of 1472 (668 kg).
| Engine Troubleshooting |
| Engine hard starting or not starting |
| Fuel filter clogging - Clean or change the filter |
| Fuel shut-off valve closed - Open the fuel shut-off valve |
| Air in fuel pipes - Bleed fuel pipes |
| Faulty or dirty injectors - Clean or replace fuel injectors |
| Fuel injection pump is not working correctly - Change or repair the pump |
| Low engine compression - Inspect cylinder block and replace worn components |
| Engine stops running unexpectedly |
| Engine is not warmed up to required temperature - Warm up engine as required |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Irregular fuel injection - Adjust fuel injection timing |
| Clogged fuel filter element - Service or replace the filter |
| Dirty or faulty injectors - Clean or replace fuel injectors |
| Engine starts and then stalls |
| Incorrectly set fuel injection pump timing - Check and correct settings |
| Fuel filter plugging - Service the filter |
| Fuel injector nozzles are dirty or defective - Install a new set of well-balanced nozzles |
| Fuel injection pump is broken - Rebuild or change fuel pump |
| Air cleaner element is clogged - Service or replace the air cleaner |
| Too low idle RPM - Adjust low idle speed |
| Fuel injection pump damage - Rebuild or replace pump |
| Clogged or damaged injector nozzles - Check and change nozzles as required |
| The valve clearance is not adjusted - Check and adjust as required |
| Lack of coolant in cooling system - Top up coolant fluid. Check for leaks or other malfunctions |
| Cooling system is dirty or cooling parts are failed - Flush cooling system or replace faulty parts |
| Engine oil level is insufficient - Fill the crankcase with engine oil |
| Fan belt is damaged or belt tension is incorrect - Adjust belt tension correctly or replace it |
| Thermostat failure - Replace the thermostat |
| Dirty or faulty injectors - Check fuel injectors and replace if required |
| Fuel injection pressure is wrong - Test fuel injection pressure and adjust it correctly |
| Clogged air filter - Service or change air filter |
| Plugged engine oil filter - Service or replace engine oil filter |
| Engine overload - Reduce the load or operate the tractor in lower gears |
| Valve clearance is wrong - Correct valve clearance |
| Low idle speed adjustment is incorrect - Adjust as required |
| Restricted fuel hoses or pipes - Clean fuel system pipes and hoses |
| Engine compression too low: Leaking or broken valves - Have valves replaced |
| Incorrect setting of fuel injection pump timing - Adjust the fuel injection pump timing correctly |
| Fuel injector nozzles are damaged - Change or clean injector nozzles |
| Lack of engine oil - Fill up the engine oil |
| Low coolant temperature - Normalize the engine temperature |
| Crankshaft or main bearings failure - Need to install new components |
| Defective or broken piston rings - Replace the piston rings as required |
| Flywheel mounting screws are loose - Tighten the screws |
| Diesel engine using too much oil |
| Oil leaking: Defective seals or gaskets - Replace defective parts |
| Incorrect oil viscosity - Use proper viscosity oil |
| Worn or stuck piston rings - Piston rings need to be replaced |
| Valve stems or guides are damaged - Install new valves |
| Worn cylinder liners or pistons - Inspect pistons and liners, change as required |
| Electrical System Troubleshooting |
| Battery is not charging |
| Faulty cell in battery - Replace the battery |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Battery terminals and cables are corroded or loose - Tighten or clean terminals and cables |
| Damaged belt or incorrectly adjusted belt tension - Adjust belt tension correctly or replace belt |
| Low battery output - Charge the battery |
| Battery does not hold charge - Service or change the battery |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Loose or corroded battery cables and terminals - Cables and terminals must be tightened or cleaned |
| Low battery voltage - Battery is drained, charge it |
| Discharged or faulty battery - Recharge or replace battery |
| Defective starter motor - Change or repair starter |
| Wiring is improperly connected or disconnected - Need to reconnect the wiring properly |
| Transmission Troubleshooting |
| Gears are hard to shift |
| Worn or incorrectly adjusted clutch - Clutch needs to be replaced or adjusted |
| Stuck or damaged gear shift linkage - Replace or repair the shift linkage |
| Damaged or worn shift forks - Shift forks need to be changed |
| Gearshift mechanism failure - Change or repair failed components |
| Low transmission fluid pressure |
| Lack of transmission fluid supply - Fill system with correct transmission fluid level |
| Plugged transmission fluid filter (if equipped) - Change or clean the transmission fluid filter |
| Faulty relief valve - Install a new relief valve |
| Bearings are worn or cracked - Change faulty bearings |
| Fluid level is low - Check transmission fluid level and add it as required |
| Contaminated transmission fluid - Fill up with fresh transmission fluid |
| Damaged gears or improper backlash - Change damaged gears or adjust backlash properly |
| Worn or damaged shift forks - Install new shift forks |
| Gaskets or seals are defective Replace worn seal or gaskets |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system is overheated |
| The system pressure has not been corrected - Make the correct settings |
| Defective or misadjusted main relief valve - Adjust or replace the relief valve |
| Contaminated hydraulic oil - Change hydraulic oil |
| Air leaks in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Low hydraulic oil pressure |
| Hydraulic fluid level is insufficient - Check and refill the hydraulic fluid |
| Hydraulic fluid filter element clogging - Replace hydraulic filter element or service if necessary |
| Hydraulic pump malfunction - Check hydraulic pump flow and replace pump if necessary |
| Defective or not adjusted hydraulic control valve - Replace or adjust correctly |
| Faulty hydraulic cylinder - Inspect the hydraulic cylinder components for damage or wear and change if required |
| Leakage in hydraulic pipes - Detect leaks in hydraulic system and repair it |
| 3-point hitch does not raise or raises very slowly |
| Hydraulic fluid level is low - Add fluid to the hydraulic system |
| Hydraulic fluid is too cold - Allow fluid to warm |
| Hydraulic oil filter element is dirty - Change hydraulic filter element or clean if necessary |
| Hydraulic pump failure - Check hydraulic pump flow and replace pump if necessary |
| Faulty or incorrectly adjusted main relief valve - Adjust or change relief valve |
| Damaged or incorrect adjusted hydraulic control valve - Set properly or replace |
| Faulty hydraulic cylinder - Check the hydraulic cylinder components for damage or wear and change if necessary |
| Suction pipe is damaged or loose - Repair or change |
| Hitch drops too slowly or can't drop |
| Defective or not adjusted hydraulic control valve - Adjust properly or change |
| Faulty hydraulic cylinder - Check the hydraulic cylinder components for damage or wear and change if necessary |
| Worn hitch rock shaft - Change the shaft |
| Hitch has mechanical defects - Replace defective or worn hitch parts |
| Hitch jerks when lift or lower |
| Air in hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic oil is dirty - Hydraulic oil change required |
| Hydraulic pump is defective - Check pump flow and change pump if necessary |
| Hydraulic spool valve block is faulty or out of adjustment - Change or adjust properly |
| Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required |
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| Farm Tractors Technical Specifications |
