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Kubota M5400 Troubleshooting
The
Kubota M5400 is a 2-wheel drive or 4-wheel drive utility tractor. This model was
manufactured from 1995 to 1999. The components of Kubota M5400 powerline system:
a 167.6 cubic inches (2.7 L) Kubota F2803 4-stroke 5-cylinder liquid-cooled
diesel engine with a rated power of 58 hp (43.3 kW), and partially synchronized
transmission with 8 forward and 4 reverse gears or creeper transmission with 12
forward and 4 reverse gears.
The maximum travel speed (forward/reverse): 19.6 mph (31.5 km/h) and 6.8
mph (10.9 km/h). The open center hydraulic system includes a gear pump
with rated fluid flow of 11 gal/min (41.6 l/min). The Kubota M5400 is
equipped with a power steering system, mechanical wet disc brakes,
7.50x16 (2WD) or 9.50x22 (4WD) front tyres, and 16.9x28 rear tyres. The
tractor is compatible with Kubota
LA1001 front-end loader with a lift capacity to full height of 2205
lbs (1000 kg) and breakout force of 3330 (1510 kg).
| Engine Troubleshooting |
| Diesel won't start or hard to start |
| Fuel filter is dirty - Replace filter element |
| Fuel is not supplied from the tank to the system - Check the fuel shut-off valve |
| Fuel lines leaking air - Tighten clamps, change faulty pipes |
| Dirty or damaged injectors - Check fuel injectors and replace if required |
| Fuel injection pump malfunction - Repair or install new pump |
| Poor compression - Inspect cylinder block and change damaged parts |
| Diesel stalls while running |
| Engine is not preheated - Warm up engine as required |
| Air trapped in fuel system - Bleed air |
| Uneven fuel injections - Repair or adjustment |
| Fuel filter is dirty - Clean or change the filter |
| Clogged or damaged injectors - Check fuel injectors and replace if required |
| Engine starts and then stalls |
| Fuel injection pump out of timing - Adjust the fuel injection pump timing correctly |
| Clogged fuel filter element - Clean the filter element |
| Fuel injector nozzles are dirty - Inspect injector nozzles and change if required |
| Fuel injection pump malfunctioning - Install a new pump or rebuild |
| Clogged air cleaner - Change or service air cleaner element |
| Engine stops at low idle speed |
| Low idle speed set incorrectly - Adjust low idling as recommended |
| Fuel injection pump is not working correctly - Repair or install new pump |
| Fuel injector nozzles fault - Change injector nozzles |
| Valve clearance is out of adjustment - Adjust valve clearance according to specifications |
| Coolant level is low - Fill the radiator to the required level. Check and repair damage to the cooling system if required |
| Cooling system parts are defective or system is clogged - Flush cooling system or replace faulty parts |
| Insufficient engine oil - Checking oil level and add if necessary |
| Unadjusted fan belt tension or worn belt - Adjust correctly or replace the belt |
| Thermostat malfunction - Check and replace if required |
| Fuel injectors are defective or dirty - Check fuel injectors and replace if required |
| Insufficient fuel injection pressure - Repair or replace injection pump |
| Air filter element clogging - Replace or clean the air filter element |
| Oil filter element clogging - Clean or replace engine oil filter element |
| Engine is overloaded - Load reducing required |
| Valve out of adjustment - Adjust valve clearance |
| Low idle speed setting is incorrect - Correct low idle adjustment |
| Dirty fuel pipes or hoses - Fuel pipes and hoses need to be cleaned |
| Insufficient engine compression: Leaking or faulty valves - Have valves replaced |
| Engine knocking sound or abnormal noise |
| Incorrect setting of fuel injection pump timing - Repair or replace fuel injection pump |
| Faulty fuel injector nozzles - Replace fuel injector nozzles |
| Lack of engine oil - Add oil to the engine crankcase |
| Engine has not warmed up to recommended temperature - Warm up engine as required |
| Crankshaft or main bearings failure - Install new parts |
| Defective or broken piston rings - Piston rings replacement required |
| The flywheel to crankshaft bolts are loose - Tighten bolts as required |
| External oil leaks: Gaskets or seals may be damaged - Defective components must be replaced |
| Oil viscosity is incorrect - Fill up with the correct oil viscosity |
| Seized or wear piston rings - Have piston rings replaced |
| Valve guides and stems are worn - Install new valves |
| Pistons or cylinder liners are worn - Check pistons and liners, install new parts as required |
| Electrical System Troubleshooting |
| Battery will not charge |
| Battery is worn - Use a new battery |
| Battery wiring harness damage - Inspect battery wiring for damage, replace or repair |
| Battery cables and terminals are corroded or loose - Tighten or clean terminals and cables |
| Worn belt or improperly adjusted belt tension - Replace belt or correctly adjust belt tension |
| Low battery power - Battery needs to be recharged |
| Battery will not hold charge - Service charging system or replace battery |
| Battery wiring harness damage - Inspect battery wiring for damage, replace or repair |
| Battery cables and terminals are corroded or loose - Clean or tighten terminals and cables |
| Low battery power - Battery needs to be recharged |
| Drained or defective battery - Recharge or change battery |
| Starter motor failing - Starter should be changed |
| Battery cables are disconnected or incorrectly connected - Check cables and reconnect it correctly |
| Transmission Troubleshooting |
| Hard shifting |
| Incorrectly adjusted or damaged clutch - Clutch needs to be replaced or adjusted |
| Gear shift linkage is damaged or loose - Service or replace shift linkage |
| Shift forks are damaged or worn - Replace the shift forks |
| Gear shifting mechanism is worn - Change worn components |
| Low transmission oil pressure |
| Insufficient fluid supply - Fill system with correct transmission fluid level |
| Transmission fluid filter clogging (if fitted) - Clean or replace the transmission fluid filter |
| Relief valve is faulty - Replace the valve |
| Transmission is making noise |
| Cracked or worn bearings - Bearings replacement required |
| Not enough fluid in transmission - Check and refill the transmission fluid |
| Transmission fluid contamination - Change transmission fluid |
| Gears are defective or backlash is incorrect - Change damaged gears or adjust backlash properly |
| Bent or worn shift forks - Install new shift forks |
| Worn gaskets or seals - Change defective gaskets or seal |
| Cracked transmission housing - Housing needs to be replaced |
| Hydraulics Troubleshooting |
| Excessive hydraulic system heat |
| Improper pressure in hydraulic system - Adjust properly |
| Main relief valve malfunction or incorrect adjustment - Set up or change the relief valve |
| Hydraulic oil is contaminated - Fill up with fresh hydraulic oil |
| Air leaks in hydraulic system - Inspect the pump seals, suction line, and fittings |
| Hydraulic oil pressure too low |
| Not enough hydraulic fluid in the system - Fill the hydraulic system with oil |
| Dirty hydraulic oil filter - Install a new hydraulic filter element |
| Faulty hydraulic oil pump - Test pump flow rate and replace pump if required |
| Hydraulic spool valve block is not set properly or defective - Adjust correctly or change |
| Hydraulic cylinder failure - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Hydraulic piping leaks - Detect leaks in hydraulic system and repair it |
| 3-point hitch raises slowly or won't raise |
| Hydraulic oil level is insufficient - Fill up the hydraulic oil |
| Cold fluid in hydraulic system - Wait for fluid to warm up |
| Hydraulic fluid filter element is dirty - Hydraulic filter maintenance required |
| Hydraulic pump failure - Check pump capacity and change if necessary |
| Main relief valve malfunction or incorrect adjustment - Adjust or change relief valve |
| Hydraulic control valve is defective or set improper - Replace or set properly |
| Faulty hydraulic cylinder - Check the hydraulic cylinder parts for damage or wear and replace if necessary |
| Damaged or disconnected hydraulic suction pipe - Connect or replace the pipe |
| Hitch can't drop or drops too slowly |
| Hydraulic control valve is faulty or out of adjustment - Adjust properly or replace |
| Faulty hydraulic cylinder - Check the hydraulic cylinder components for damage or wear and change if necessary |
| Worn hitch rock shaft - Replace the shaft |
| The hitch has internal mechanical malfunctions - Replace worn or damaged hitch parts |
| Jerky lowering or lifting of the hitch |
| Air enters in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Hydraulic fluid is contaminated - Fill up with new hydraulic fluid |
| Hydraulic pump is faulty - Check pump flow and install new pump if necessary |
| Hydraulic control valve is not set properly or defective - Set properly or replace |
| Hydraulic cylinder is broken - Inspect cylinder parts for wear or damage and replace if required |
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| Farm Tractors Technical Specifications |
