________________________________________________________________________________________
Kubota L3600 Troubleshooting
The
Kubota L3600 compact utility tractor was manufactured from 1994 to 1999. The
Kubota L3600 tractor is powered by 113.3 cu.in (1.9 L) Kubota V1903-A 4-cycle
vertical 4-cylinder indirect injection liquid cooled diesel engine with a rated
power of 38.5 Hp (28.7 kW).
The Kubota L3600 is fitted with two transmission options: Sync Shuttle
fully synchronized transmission with 8 forward and 8 reverse gears, or
Glide Shift creeper transmission with 16 forward and 16 reverse gears.
Max forward speed - 14.3 mph (23 km/h), maximum reverse speed - 13.1 mph
(21.1 km/h).
The open center hydraulic system includes a gear pump with a rated
capacity of 7.8 gpm (29.5 lpm). The hydraulic pressure is 175 bar (2490
psi). The Kubota L3600 was equipped with a hydrostatic power steering,
wet disc brakes, 6.00x16 (2WD) or 8.3x16 (4WD) front tires, and 13.6x24
rear tires. The wheelbase is 71.3" (1810 mm) for 2-wheel drive models
and 71.1" (1805 mm) for 4-wheel drive models.
Compatible attachments for the tractor: 72" mid-mount 3-blade Kubota
RC72-36 mower deck with cutting height of 1.5-4.0" (37-102 mm), 72"
front-mount Kubota L2072 blade with hydraulic lifting, 62" front-mount
Kubota L62HD snow blower, Kubota BL4690 backhoe, and
Kubota LA681 loader
with lift capacity to full height of 1500 lbs (680 kg).
| Engine Troubleshooting |
| Engine will not start or starts up hard |
| Dirty fuel filter element - Change the filter element |
| Closed fuel supply valve - Open supply valve to inject fuel |
| Water, dirt, or air in fuel system - Drain, flush, fill, and bleed system |
| Fuel injectors are defective or dirty - Service or change fuel injectors |
| Fuel injection pump failure - Install a new pump or rebuild |
| Low compression - Check cylinder block and replace damaged components |
| Engine stops unexpectedly while running |
| Engine is not preheated - Engine is not warmed up to the required temperature |
| Fuel lines leaking air - Tighten clamps, change faulty pipes |
| Uneven fuel injections - Repair or adjustment |
| Fuel filter is clogged - Change filter element |
| Fuel injectors are defective or dirty - Inspect fuel injectors and replace if necessary |
| Engine starts but immediately shuts off |
| Unadjusted fuel injection pump timing - Check and correct settings |
| Plugged fuel filter - Replace filter element |
| Dirty or defective injector nozzles - Test injector nozzles and replace as required |
| Fuel injection pump failure - Change pump or rebuild it |
| Air cleaner element is dirty - Air cleaner maintenance required |
| Engine stops while idling |
| Incorrectly adjusted low idle speed - Correct low idle adjustment |
| Fuel injection pump is defective - Repair or install new pump |
| Dirty or defective injector nozzles - Check and change nozzles as required |
| Excessive valve clearance - Correct valve clearance needs to be set |
| Engine has a lack of coolant - The cooling system needs to be refilled. Check for coolant leaks |
| Cooling system is dirty or cooling parts are failed - Flush cooling system or change faulty components |
| Engine oil level is low - Fill the crankcase with engine oil |
| Fan belt is defective or belt tension is not adjusted - Adjust properly or change the belt |
| Defective thermostat - Check and replace if required |
| Diesel engine is losing power |
| Dirty or faulty injectors - Change fuel injectors |
| Incorrect fuel injection pressure - Check the fuel injection pressure and adjust if necessary |
| Air filter is clogged - Replace filter or install new filter element |
| Engine oil filter is plugged - Replace or service engine oil filter |
| Engine overload - Change to lower gear or reduce load |
| Improper valve clearance - Need to adjust valve clearance |
| Low idle speed setting is incorrect - Adjust the low idle speed |
| Clogged fuel pipes or hoses - Clean fuel system hoses and pipes |
| Poor engine compression: Valves are damaged or leaking - Have valves replaced |
| Fuel injection pump timing is incorrect - Adjust injection timing |
| Clogged or damaged injector nozzles - Check and change nozzles as required |
| Engine oil level low - Check oil level and add oil as required |
| Coolant temperature is low - Warm up engine as required |
| Crankshaft or main bearings wear - Install new parts |
| Piston rings failure - Piston rings replacement required |
| Flywheel bolts are loose - Bolts need to be tightened |
| Engine using too much oil |
| External oil leaks: Damaged gaskets or seals - Change worn parts according to specifications |
| Crankcase oil too light - Fill up with the proper oil viscosity |
| Piston rings are defective or worn - Change piston rings |
| Valve stems or guides are damaged - Replace defective valves |
| Scored cylinder liners or pistons - Inspect pistons and liners, fit new components as necessary |
| Electrical System Troubleshooting |
| Battery won’t charge |
| Worn-out battery - Replace the battery |
| Battery electrical wire harness failure - Inspect wires for defects, change or repair |
| Corroded or loose terminals and cables - Cables and terminals must be tightened or cleaned |
| Damaged belt or incorrectly adjusted belt tension - Replace belt or properly adjust belt tension |
| Starter motor cranks slow |
| Low battery power - Recharge the battery |
| Battery is not holding charge - Service battery or change it |
| Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
| Corroded or loose battery cables and terminals - Terminals and cables need to be tightened or cleaned |
| Low battery output voltage - Battery is drained, recharge it |
| Discharged or faulty battery - Charge or change the battery |
| Starter motor failure - Starter should be changed |
| Improperly connected or disconnected cables - Check battery cables and connect properly |
| Transmission Troubleshooting |
| Hard to shift gears |
| Failure or improper clutch adjustment - Change or adjust clutch |
| Gear shift linkage is stuck or worn - Repair or change shift linkage |
| Bent or worn shift forks - Shift forks need to be changed |
| Gearshift mechanism failure - Change or repair failed components |
| Transmission fluid pressure is insufficient |
| Lack of transmission fluid supply - Add transmission fluid as required |
| Transmission oil filter element is dirty (if fitted) - Change or clean the transmission oil filter |
| Relief valve is defective - Install a new relief valve |
| Excessive transmission noise |
| Bearings are worn or broken - Change faulty bearings |
| Lack of transmission fluid supply - Check and refill the transmission fluid |
| Dirty transmission oil - Change transmission oil |
| Improper backlash or damaged gears - Replace gears or set backlash properly |
| Shift forks are damaged or worn - Change defective shift forks |
| Gaskets or seals are broken - Install new components |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system overheating |
| Hydraulic system pressure is incorrect - Hydraulic pressure needs to be set correctly |
| Defective or misadjusted main relief valve - Adjust or replace the relief valve |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Aeration in hydraulic system - Check the suction pipe, fittings, and pump seals |
| Low hydraulic fluid pressure |
| Not enough hydraulic oil in the system - Check oil level and add hydraulic oil as required |
| Hydraulic oil filter element clogging - Install a new hydraulic filter element |
| Hydraulic pump not working - Check pump performance and change it if necessary |
| Damaged or incorrect adjusted hydraulic control valve - Replace or adjust correctly |
| Defective hydraulic cylinder - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Hydraulic lines are leaking - Detect leaks in hydraulic system and repair it |
| Hitch fails to lift or lifts slowly |
| Hydraulic oil level is insufficient - Add oil to the hydraulic system |
| Cold hydraulic oil - Warm up the oil |
| Dirty hydraulic oil filter - Change hydraulic filter element or clean if necessary |
| Defective hydraulic pump - Check hydraulic pump flow and replace pump if necessary |
| Unadjusted or defective main relief valve - Set up or change the relief valve |
| Defective or incorrect setting hydraulic spool valve block - Adjust correctly or replace |
| Defective hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Disconnected or damaged suction pipe - Connect or replace |
| Hitch can't drop or drops too slowly |
| Defective or not adjusted hydraulic spool valve - Adjust properly or replace |
| Hydraulic cylinder is not working - Check cylinder components for damage or wear and change if necessary |
| Damaged lift arm shaft - Install a new shaft |
| Mechanical parts of the hitch are damaged - Replace worn or damaged hitch components |
| Hitch is lowered or raised jerkily |
| Air in hydraulic system - Check the suction pipe, fittings, and pump seals |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Hydraulic pump malfunction - Check hydraulic pump flow and replace pump if necessary |
| Faulty or incorrect setting hydraulic spool valve - Adjust properly or change |
| Hydraulic cylinder is broken - Inspect cylinder components for damage or wear and change if required |
| Steering System Troubleshooting |
| Steering is difficult |
| Worn or improperly mounted steering column - Mount the steering column properly or change it |
| Air in steering system - Need to bleed air |
| Not adjusted toe-in - Adjust toe-in properly |
| Tires are not correctly inflated - Inflate tires as necessary |
| Defective hydraulic steering pump - Check the hydraulic steering pump and change if necessary |
| Faulty or worn hydrostatic steering unit - Repair or replace the steering unit |
| Relief valve malfunction or sticking - Install a new relief valve or clean it |
| Insufficient steering oil - Need to add steering oil |
| Oil leaks in the steering system - Retighten steering line and hose connections |
| Excessive play in steering |
| Steering column shaft or coupling is worn out - Replace defective part |
| Worn or damaged hydrostatic steering unit - Change or repair steering unit if required |
| Worn steering pump - Replace or repair steering pump |
| Steering linkage or tie-rod ends are worn - Replace failed part |
| Tractor pulls to right or left |
| Front tires are worn out - Install new tires |
| Not adjusted toe-in - Adjust toe-in wheels properly |
| Steering tie-rod ends or linkage are defective - Change failed component |
| Faulty or worn hydrostatic steering unit - Replace or repair steering unit as required |
| Steering cylinder is defective - Change or repair hydraulic steering cylinder |
| Incorrectly adjusted or damaged front hub bearings - Adjust correctly or replace bearings |
________________________________________________________________________________________
________________________________________________________________________________________
| Farm Tractors Technical Specifications |
