________________________________________________________________________________________
Kubota L185 Troubleshooting
The
Kubota L185 is a 2WD or 4WD (L185DT) compact utility tractor. This model was
manufactured from 1977 to 1982. The Kubota L185 tractor is equipped with a 45.3
cubic inches Kubota Z751 two-cylinder liquid cooled diesel.
The engine has a cylinder bore of 3.0" (76 mm), piston stroke of 3.22"
(82 mm), and rated power of 15 hp (11.2 kW). The sliding gear
transmission consists of a dry clutch and gearbox with 8 forward and 2
reverse gears. Max. forward speed - 13.1 mph (21 kph), max. reverse
speed - 9 mph (14.5 kph). The open center hydraulic system includes a
gear pump with a flow of 6.2 gal/min (23.5 l/min).
The main relief pressure is 147 bar (2130 psi). The 2-wheel drive models
are equipped with 4.00x15 front tires and 9.5x24 rear tires. The 6.00x14
front tires and 9.5x24 rear tires are used for tractors with 2-wheel
drive (L185DT). The wheelbase is 60 inches (1520 mm). The Kubota L185
tractor is compatible with a Kubota L1200 front end loader.
Engine Troubleshooting |
Engine won't start or difficult to start |
Dirty fuel filter element - Clean the filter or install new filter element |
No fuel injection - Open fuel cock to inject fuel |
Fuel-line is leaking air - Retighten clamps, replace defective pipes |
Clogged fuel injectors - Service or change fuel injectors |
Fuel injection pump malfunctioning - Change or repair the pump |
Poor compression - Check cylinder block and replace worn parts |
Engine shuts off while driving |
Engine not warmed up - Warm up engine as required |
Air in fuel pipes - Bleed fuel pipes |
Uneven fuel injections - Repair or adjustment |
Fuel filter plugging - Change the filter element |
Fuel injectors are defective or dirty - Change fuel injectors |
Engine starts and then stalls |
Incorrectly set fuel injection pump timing - Check and correct settings |
Fuel filter is clogged - Clean the filter element |
Fuel injector nozzles fault - Install new set of properly balanced nozzles |
Fuel injection pump is damaged - Rebuild or install a new injection pump |
Dirty air cleaner - Replace or service air cleaner element |
Incorrectly set low idle speed - Adjust low idle speed |
Fuel injection pump is faulty - Repair or change injection pump |
Clogged or defective injector nozzles - Test injector nozzles and replace as required |
Excessive valve clearance - Correct valve clearance needs to be set |
Insufficient coolant fluid - Fill cooling system to proper level. Check for coolant leaks |
Cooling system components are failed or system is dirty - Replace faulty parts or service cooling system |
Not enough engine oil - Add oil to the engine crankcase |
Fan belt tension is improper or belt is defective - Adjust belt tension correctly or change it |
Defective thermostat - Check and change if necessary |
Dirty or faulty injectors - Clean or replace fuel injectors |
Incorrect fuel injection pressure - Adjust pressure to proper level |
Dirty air filter - Change or replace air filter element |
Oil filter element is dirty - Service or change engine oil filter element |
Engine is under excessive load - Change to lower gear or reduce load |
Incorrect valve clearance - Adjustment procedure required |
Improperly adjusted low idle speed - Adjust low idling as recommended |
Restricted fuel pipes or hoses - Fuel pipes and hoses need to be cleaned |
Loss of compression: Leaking or faulty valves - Install new valves |
Incorrectly set fuel injection pump timing - Fuel pump timing settings need to be corrected |
Fuel injector nozzles fault - Test injector nozzles and replace as required |
Engine oil level low - Need to add engine oil |
Engine has not warmed up to the recommended temperature - Warm up the engine as required |
Worn main bearings or crankshaft - Worn parts replacement required |
Piston rings failure - Install new piston rings |
Loose flywheel bolts - Check flywheel bolts and tighten properly |
Engine oil consumption is too high |
Oil leaking: Gaskets or seals can be faulty - Change to repair leaks |
Oil viscosity is incorrect - Fill up with the proper oil viscosity |
Piston rings are seized or worn - Change the piston rings as required |
Valve stems and guides are worn - Replace the valves |
Worn cylinder liners or pistons - Inspect pistons and liners, change as required |
Electrical System Troubleshooting |
Battery won’t charge |
Bad cell in battery - Change the battery |
Bad battery electrical wire harness - Check wires for malfunctions, repair or replace |
Corroded or loose battery terminals and cables - Tighten or service cables and terminals |
Damaged belt or incorrectly adjusted belt tension - Adjust belt tension correctly or change belt |
Battery power is low - Charge the battery |
Battery will not hold charge - Service battery or change it |
Battery cable harness failure - Check battery electrical cable for defects, replace or repair |
Loose or corroded cables and terminals - Clean or tighten cables and terminals |
Low battery capacity - Recharge the battery |
Drained or faulty battery - Change or recharge battery |
Starter motor is damaged - Repair or install a new starter |
Disconnected or incorrectly connected cables - Need to reconnect cables correctly |
Transmission Troubleshooting |
Hard to shift gears |
Clutch is unadjusted or worn - Adjust clutch or change if necessary |
Gear shift linkage is stuck or worn - Change defective shift linkage |
Bent or worn shift forks - Change defective shift forks |
Faulty gear shifting mechanism - Faulty parts must be changed |
Transmission oil pressure is insufficient |
Not enough oil in transmission - Fill the transmission housing to proper oil level |
Plugged transmission fluid filter (if equipped) - Change or clean the transmission fluid filter |
Damaged relief valve - Change the valve |
Bearings are worn or broken - Bearings replacement required |
Oil level is low - Add transmission oil as required |
Contaminated transmission oil - Fill up with fresh transmission oil |
Defective gears or incorrect backlash - Change the gears or adjust backlash correctly |
Damaged or worn shift forks - Shift forks need to be replaced |
Worn gaskets or seals - Gaskets or seal need to be replaced |
Cracked transmission case - Install a new transmission case |
Hydraulics Troubleshooting |
Excessive hydraulic system heat |
Improper pressure in hydraulic system - Adjust properly |
Main relief valve failure or incorrect setting - Adjust the valve or replace if necessary |
Dirty hydraulic oil - The oil must be changed |
Air in hydraulic system - Inspect the pump seals, suction line, and fittings |
Insufficient hydraulic fluid pressure |
Lack of hydraulic fluid - Check and refill the hydraulic fluid |
Dirty hydraulic oil filter - Clean or change hydraulic filter |
Hydraulic pump malfunction - Check hydraulic pump flow and replace pump if necessary |
Hydraulic control valve block is faulty or out of adjustment - Replace or set properly |
Hydraulic cylinder is broken - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
Hydraulic lines are leaking - Detect leaks in hydraulic system and repair it |
3-point hitch does not raise or raises very slowly |
Hydraulic fluid level is low - Check and refill the hydraulic fluid |
Hydraulic oil is too cold - Allow oil to warm |
Dirty hydraulic oil filter - Install a new hydraulic filter element |
Defective hydraulic pump - Check the pump capacity and replace pump if required |
Defective or misadjusted main relief valve - Adjust or replace the relief valve |
Hydraulic control valve block is faulty or out of adjustment - Replace or set correctly |
Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required |
Damaged or loose suction line - Tighten or change |
Hitch does not lower or lowers very slowly |
Hydraulic spool valve is not set properly or defective - Adjust correctly or replace |
Hydraulic cylinder is not working - Inspect cylinder parts for wear or damage and replace if required |
Hitch cross shaft is damaged - Replace the shaft |
Damaged mechanical components of the hitch - Replace worn or faulty hitch parts |
3-point hitch lifting or lowering is jerky |
Aeration in hydraulic system - Check the pump seals, suction line, and fittings |
Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
Hydraulic pump is defective - Test pump performance and replace pump if necessary |
Defective or incorrect setting hydraulic spool valve block - Replace or adjust correctly |
Hydraulic cylinder is defective - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
Steering System Troubleshooting |
Hard Steering |
Steering knuckle or steering column is stuck - Inspect steering column and knuckle, replace worn parts |
Steering gearbox components are worn - Replace defective components of steering gearbox |
Faulty drag link or tie rod - Replace or repair |
Insufficient lubrication in steering box - Need to lubricate the gearbox |
Not adjusted toe-in alignment - Check and adjust toe-in |
Tires are not correctly inflated - Inflate tires as necessary |
Excessive steering wheel free play |
Steering column bearing or shaft is worn - Change faulty parts |
Steering linkage assembly is worn or loose - Repair or replace steering linkage |
Worn steering gearbox bearings - Replace the bearings |
Front wheel hub bearings or steering knuckles are worn - Change hub bearings or knuckles |
Damaged or worn steering tie-rod ends - Change faulty part |
Tractor pulls to right or left |
Worn or loose steering linkage assembly - Repair or replace steering linkage |
Defective steering knuckle bushing - Replace knuckle bushing |
Uneven tire pressure - Inflate the tires properly |
Toe-in adjustment is incorrect - Adjust toe-in correctly |
________________________________________________________________________________________
Farm Tractors Technical Specifications |