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Kubota M135X Troubleshooting
The
Kubota M135X row crop tractor was manufactured between 2009 and 2014. This model
was designed in two versions: M135XDTC (Standard front axle) and M135XDTSC
(Front axle suspension). The Kubota M135X tractor is powered by Kubota
V6108-TI-CRS 4-cycle 4-cylinder direct injection turbocharged diesel engine. A
373.7 cubic inches (6.1L) engine has a cylinder bore of 4.65" (118 mm), piston
stroke of 5.51" (140 mm), and rated power of 135 hp (100.7 kW).
The Kubota M135X is fitted with two transmission options: Intelli-Shift
partial powershift transmission with 16 forward and 16 reverse gears,
and Intell-Shift Creeper transmission with 24 forward and 24 reverse
gears. Max travel speed - 22.5 mph (36.3 km/h), max creeper speed - 0.7
mph (1.1 km/h). The open center hydraulic system used a gear pump with
fluid flow rate of 20.4 gal/min (77.7 l/min). The hydraulic pressure is
196 bar (2845 psi).
The Kubota M135X was equipped with a hydrostatic power steering,
hydraulic wet disc brakes, 14.9R24 or 420/70R24 front tires, and 18.4R38
or 520/80R38 rear tires. The wheelbase is 105.9" (2680 mm). The tractor
is compatible with a Kubota LA1601S loader with lift capacity to max
height of 4877 lbs (2212 kg) and breakout force of 6398 lbs (2902 kg).
| Engine Troubleshooting |
| Diesel will not start or hard to start |
| Fuel filter is dirty - Service or replace the filter |
| No fuel injection - Open fuel cock to inject fuel |
| Air in fuel pipes - Bleed fuel pipes |
| Dirty or damaged injectors - Change fuel injectors |
| Fuel injection pump malfunction - Rebuild or change fuel pump |
| Poor cylinder compression - Inspect cylinder block and change damaged parts |
| Engine stalls during operation |
| Engine is cold - Warm up engine as required |
| Air in fuel pipes - Bleed fuel pipes |
| Fuel injection failed - Use correct settings |
| Clogged fuel filter element - Service the filter |
| Clogged or damaged injectors - Clean or replace fuel injectors |
| Diesel starts but then shuts off |
| Incorrectly set fuel injection pump timing - Check and correct settings |
| Dirty fuel filter element - Clean or replace the filter |
| Damaged or clogged injector nozzles - Check and change nozzles as required |
| Defective fuel injection pump - Rebuild or install a new injection pump |
| Dirty air cleaner - Air cleaner maintenance required |
| Wrong adjustment of low idle speed - Correct low idle adjustment |
| Fuel injection pump damage - Rebuild or install a new injection pump |
| Dirty or defective injector nozzles - Install new set of properly balanced nozzles |
| Excessive valve clearance - Have it adjusted |
| Lack of coolant in cooling system - Coolant needs to be refilled. Check for leaks or other malfunctions |
| Cooling system is clogged or cooling parts are defective - Replace faulty parts or service cooling system |
| Lack of engine oil - Checking oil level and add if necessary |
| Fan belt is defective or belt tension is not adjusted - Adjust belt tension correctly or replace it |
| Thermostat fault - Install new thermostat |
| Fuel injectors are damaged or dirty - Clean or replace fuel injectors |
| Incorrect fuel injection pressure - Check the fuel injection pressure and adjust if necessary |
| Clogged air filter - Replace or service air filter element |
| Plugged engine oil filter - Clean or replace engine oil filter element |
| Engine is running overloaded - Shift to lower gear or reduce the load |
| Valve clearance is wrong - Correct valve clearance |
| Incorrect low idle speed adjustment - Normalize low idle speed |
| Restricted fuel pipes or hoses - Service fuel hoses and pipes |
| Lack of compression: Valves are faulty or leaking - Replace the valves as required |
| Abnormal engine knocking or noise |
| Fuel injection pump timing is incorrect - Adjust injection timing |
| Fuel injector nozzles are damaged - Service or replace injector nozzles |
| Lack of engine oil - Fill the crankcase with engine oil |
| Engine is not warmed up to the required temperature - Warm up the engine |
| Crankshaft or main bearings failure - Need to install new components |
| Piston rings failure - Replace piston rings |
| Loose flywheel screws - Check the flywheel screws and tighten as required |
| High engine oil consumption |
| Oil leaking: Seals or gaskets are defective - Change to repair leaks |
| Improper oil viscosity - Fill up with the proper oil viscosity |
| Piston rings are stuck or worn - Piston rings replacement required |
| Valve stems and guides are worn - Valves must be replaced |
| Damaged pistons or cylinder liners - Inspect pistons and liners, replace as required |
| Electrical System Troubleshooting |
| Battery will not charge |
| Faulty cell in battery - Battery replacement required |
| Battery wiring harness damage - Inspect battery wiring for damage, replace or repair |
| Corroded or loose terminals and cables - Tighten or clean terminals and cables |
| Incorrect belt tension adjustment or worn belt - Adjust belt tension properly or change belt |
| Low battery capacity - Battery is drained, recharge it |
| Battery is draining quickly - Service battery or change it |
| Damaged battery cable harness - Check electrical cables for damage, repair or replace |
| Battery cables and terminals are loose or corroded - Tighten or clean terminals and cables |
| Battery power is low - Charge the battery |
| Drained or defective battery - Charge or change the battery |
| Starter motor is damaged - Starter should be replaced |
| Improperly connected or disconnected cables - Check battery cables and connect properly |
| Transmission Troubleshooting |
| Hard shifts |
| Clutch is unadjusted or worn - Replace or adjust clutch |
| Loose or broken gear shift linkage - Change defective shift linkage |
| Bent or worn shift forks - Replace the shift forks |
| Gearshift mechanism is worn out - Repair or replace worn components if required |
| Transmission oil pressure is insufficient |
| Not enough oil in transmission - Fill up the transmission oil |
| Clogged transmission fluid filter element (if fitted) - Change or clean the transmission fluid filter |
| Faulty relief valve - Replace relief valve as required |
| Transmission is making noise |
| Bearings are worn or damaged - Faulty bearings should be changed |
| Fluid level is low - Add transmission fluid as required |
| Dirty transmission fluid - Change transmission fluid |
| Worn gears or improper backlash - Replace gears or set backlash correctly |
| Bent or worn shift forks - Replace defective shift forks |
| Worn gaskets or seals - Install new components |
| Transmission housing is cracked - Replace housing or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system is overheated |
| System pressure has not been adjusted correctly - Pressure needs to be adjust correctly |
| Main relief valve failure or incorrect setting - Adjust or change relief valve |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Air leaks in hydraulic system - Check the suction line, pump seals, and fittings |
| Hydraulic oil pressure is low |
| Hydraulic oil level is low - Fill up the hydraulic oil |
| Hydraulic fluid filter is dirty - Replace hydraulic filter element or service if necessary |
| Hydraulic pump failure - Test pump performance and replace pump if necessary |
| Defective or not adjusted hydraulic spool valve - Adjust properly or replace |
| Hydraulic cylinder is defective - Inspect cylinder components for wear or damage and change if required |
| Hydraulic lines are leaking - Identify leaks in the system and repair it |
| 3-point hitch won't raise or raises slowly |
| Hydraulic fluid level is low - Need to add fluid |
| Hydraulic oil is too cold - Allow oil to warm |
| Hydraulic oil filter element clogging - Clean or change hydraulic filter |
| Hydraulic pump is faulty - Test pump performance and replace pump if necessary |
| Main relief valve malfunction or incorrect adjustment - Adjust relief valve or change if required |
| Hydraulic spool valve block is defective or set improper - Set properly or replace |
| Faulty hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Loose or damaged suction line - Tighten or replace |
| Hitch drops too slowly or can't drop |
| Hydraulic control valve is defective or set improper - Adjust correctly or change |
| Hydraulic cylinder is faulty - Inspect the hydraulic cylinder parts for damage or wear and replace if required |
| Hitch rock shaft is worn Install a new shaft |
| Mechanical parts of the hitch are damaged - Change worn or damaged hitch parts |
| Hitch lower or lift is jerky |
| Air enters in hydraulic system - Check the suction pipe, fittings, and pump seals |
| Hydraulic oil contamination - Change the oil |
| Hydraulic pump is faulty - Test the pump flow rate and install new pump if required |
| Hydraulic control valve is faulty or out of adjustment - Adjust correctly or replace |
| Faulty hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Steering System Troubleshooting |
| Steering is hard |
| Steering column is broken or improperly installed - Steering column must be installed properly or replaced |
| Air leaks in steering system - Air-bleed steering system |
| Improper toe-in adjustment - Adjust toe-in properly |
| Tires are not properly inflated - Inflate tires as required |
| Steering pump failure - Steering pump needs to be repaired or replaced |
| Worn or defective hydrostatic steering unit - Inspect and change as required |
| Relief valve sticking or malfunction - Clean or change the relief valve |
| Steering fluid level is insufficient - Add oil to steering system |
| Oil leaks in the steering system - Retighten steering hose and line connections |
| Steering wheel free play is excessive |
| Worn steering column shaft or coupling - Replace defective part |
| Worn or defective hydrostatic steering unit - Replace or repair steering unit as required |
| Steering pump is worn - Replace or repair steering pump |
| Worn or faulty steering linkage or tie-rod ends - Replace damaged part |
| Front wheels wander to left or right |
| Deflated front tyres - Inflate tyres as needed |
| Incorrect toe-in - Check toe-in and correct |
| Worn or faulty steering tie-rod ends or linkage - Change failed part |
| Hydrostatic steering unit is damaged or worn - Replace or repair steering unit as required |
| Defective steering cylinder - Replace or repair steering cylinder |
| Front hub bearings are damaged or incorrectly adjusted - Change or adjust bearings correctly |
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| Farm Tractors Technical Specifications |
