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Kubota M4700 Troubleshooting
The
Kubota M4700 utility tractor was manufactured between 1995 and 1997. The Kubota
M4700 tractor is equipped with a 167.6 cu.in (2.7 L) Kubota F2803 4-stroke
5-cylinder liquid-cooled diesel engine. The engine has a cylinder bore of 3.43"
(87 mm), piston stroke of 3.64" (92 mm), and rated power of 51 hp (38 kW). The
partially synchronized transmission consists of a single dry clutch and gearbox
with 8 forward and 4 reverse gears.
The maximum forward speed - 18 mph (29 kph), maximum reverse speed - 6.3
mph (10.1 kph). The open center hydraulic system has a gear pump with a
rated capacity of 9.3 gal/min (35 l/min). The two-wheel drive models are
equipped with 6.50x16 front tyres and 14.9x28 rear tyres. The 9.50x22
front tyres and 14.9x28 rear tyres fit four-wheel drive tractors. The
Kubota M4700 tractor can be equipped with the following attachments:
Kubota LA1001 front-end loader
with a lift capacity to full height of 2205 lbs (1000 kg), or
Kubota LA1002 front-end loader
with a lift capacity to full height of 2579 lbs (1169 kg).
| Engine Troubleshooting |
| Engine is not starting or hard starting |
| Dirty fuel filter element - Clean or replace the filter |
| Closed fuel supply valve - Open supply valve to inject fuel |
| There is air in the fuel system - Bleed the system |
| Fuel injectors are clogged or faulty - Inspect fuel injectors and replace if necessary |
| Fuel injection pump is broken - Repair or change injection pump |
| Engine has bad compression - Check cylinder block and change worn components |
| Diesel stalls while running |
| Low coolant temperature - Warm up the engine |
| Air in fuel system - Air-bleed fuel system |
| Bad fuel injection - Check and adjust |
| Fuel filter plugging - Service the filter |
| Fuel injectors are clogged or faulty - Check fuel injectors and replace if required |
| Engine starts but immediately shuts off |
| Timing of fuel injection pump is wrong - Adjust injection timing |
| Fuel filter is clogged - Change the filter element |
| Fuel injector nozzles are dirty or defective - Install new set of properly balanced nozzles |
| Fuel injection pump is broken - Repair or install new pump |
| Air cleaner element is dirty - Replace cleaner or install new cleaner element |
| Incorrect low idle setting - Normalize low idle speed |
| Defective fuel injection pump - Replace or rebuild injection pump |
| Faulty fuel 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 - Fill the radiator to the required level. Check system for leaks |
| Cooling system components are worn or system is clogged - Service the cooling system or change faulty parts |
| Engine oil insufficient - Check oil level and add oil as required |
| Damaged fan belt or unadjusted belt tension - Adjust belt tension properly or replace it |
| Defective thermostat - Check thermostat, replace if necessary |
| Fuel injectors are defective or dirty - Check fuel injectors and replace if required |
| Fuel injection pressure is wrong - Adjust pressure to proper level |
| Air filter is dirty - Install new filter element or replace it |
| Clogged oil filter - Service or change engine oil filter element |
| Diesel engine is overloaded - Reduce the load or use a lower gear |
| Improper valve clearance - Need to adjust valve clearance |
| Wrong adjustment of low idle speed - Correct low idle adjustment |
| Clogged fuel hoses or pipes - Clean fuel pipes and hoses |
| Engine compression is low: Leaking or broken valves - Valves need to be replaced |
| Unadjusted fuel injection pump timing - Check and correct adjustments |
| Fuel injector nozzles are damaged - Change injector nozzles |
| Engine oil level is insufficient - Checking oil level and add if necessary |
| Engine is not fully warmed up - Normalize the engine temperature |
| Main bearings or crankshaft failure - Replace crankshaft or bearings |
| Piston rings are worn or broken - Piston rings replacement required |
| Loose flywheel bolts - Inspect flywheel bolts and tighten properly |
| Engine using too much oil |
| External oil leaks: Worn seals or gaskets - Change to repair leaks |
| Incorrect oil viscosity - Use correct viscosity oil |
| Piston rings are stuck or broken - Change the piston rings as required |
| Valve stems and guides are worn - Replace the valves |
| Pistons or cylinder liners are damaged - Check liners and pistons, install new components as required |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Defective battery - Battery change required |
| Damaged battery electrical wire harness - Inspect electrical wires for damage, change or repair |
| Loose or corroded terminals and cables - Service or tighten battery cables and terminals |
| Improper belt tension adjustment or damaged belt - Change belt or adjust belt tension properly |
| Low battery power - Charge the battery |
| Battery drains quickly - Service or change the battery |
| Bad battery cable harness - Inspect cables for malfunctions, repair or change |
| Corroded or loose terminals and cables - Tighten or clean cables and terminals |
| Low battery power - Battery needs to be recharged |
| Drained or defective battery - Charge or change the battery |
| Starter motor is defective - Starter needs to be changed |
| Improperly connected or disconnected cables - Check battery cables and connect properly |
| Transmission Troubleshooting |
| Hard shifting |
| Clutch is unadjusted or worn - Adjust or replace the clutch |
| Gear shift linkage is stuck or worn - Change defective shift linkage |
| Damaged or worn shift forks - Install new shift forks |
| Gear shifting mechanism is worn - Change worn components |
| Transmission oil pressure is low |
| Low transmission fluid level - Fill the transmission housing with fluid |
| Transmission fluid filter element is dirty (if fitted) - Replace or clean transmission fluid filter |
| Relief valve is defective - Install a new valve |
| Transmission is making noise |
| Cracked or worn bearings - Replace the bearings |
| Oil level is insufficient - Correct the transmission oil level |
| Contaminated transmission fluid - Transmission fluid must be changed |
| Worn gears or improper backlash - Change the gears or adjust backlash correctly |
| Bent or worn shift forks - Replace the shift forks |
| Seals or gaskets are damaged - Seals and gaskets need to be replaced |
| Cracked transmission case - Install a new transmission case |
| Hydraulics Troubleshooting |
| Hydraulic system overheated |
| Improper pressure in hydraulic system - Adjust properly |
| Main relief valve is damaged or adjusted improperly - Set up or change the relief valve |
| Hydraulic fluid contamination - Change hydraulic fluid |
| Air trapped in the hydraulic system - Inspect the pump seals, suction line, and fittings |
| Low hydraulic oil pressure |
| Not enough hydraulic fluid in the system - Fill the hydraulic system with oil |
| Hydraulic fluid filter is clogged - Service or replace the hydraulic filter |
| Hydraulic pump is defective - Check hydraulic pump flow and replace pump if necessary |
| Damaged or incorrect adjusted hydraulic control valve - Replace or adjust properly |
| Hydraulic cylinder is not working - Check cylinder components for wear or damage and change if necessary |
| Hydraulic piping leaks - Detect leaks in the system and fix it |
| Three-point hitch lifting is too slow or cannot be lifted |
| Lack of hydraulic fluid - Fill the hydraulic system with oil |
| Hydraulic oil is too cold - Allow oil to warm |
| Dirty hydraulic oil filter - Change the hydraulic filter element or service if required |
| Faulty hydraulic oil pump - Check pump performance and change it if necessary |
| Defective or misadjusted main relief valve - Adjust relief valve or change if required |
| Defective or incorrect setting hydraulic spool valve block - Replace or set correctly |
| Hydraulic cylinder is broken - Check cylinder components for wear or damage and change if necessary |
| Disconnected or damaged suction pipe - Connect or replace |
| Hitch not dropping or hitch drops slowly |
| Defective or incorrect setting hydraulic control valve block - Change or set correctly |
| Faulty hydraulic cylinder - Check cylinder parts for wear or damage and replace if necessary |
| Hitch rock shaft is damaged - Replace the shaft |
| Hitch has mechanical defects - Change worn or defective hitch components |
| Jerky lowering or lifting of the hitch |
| Air leaks in hydraulic system - Check the pump seals, suction line, and fittings |
| Dirty hydraulic fluid - The fluid must be changed |
| Defective hydraulic pump - Test the pump flow rate and change pump if required |
| Hydraulic control valve block is defective or set improper - Change or set correctly |
| Hydraulic cylinder is faulty - Check cylinder components for wear or damage and change if necessary |
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| Farm Tractors Technical Specifications |
