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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
Engine stalling at idle
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
Engine overheats
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
Engine power is too low
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
Engine noises or knocks
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
Starter motor turns slow
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
Starter does not work
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
External oil leaks
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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JD 1026R JD 3650 JD 6400 JD 7810
FORD 1320 FORD 2810 FORD 3930 FORD 5600
MF 250 MF 690 MF 3060 MF 6180
NH TC48DA NH M100 NH T7550 NH 8560
CASE IH 495 CASE IH 1255XL CASE IH 2140 CASE IH 2294