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Kubota B7200 Troubleshooting
The
Kubota B7200 compact utility tractor was manufactured between 1983 and 1990.
This model was designed in 2 versions: B7200E (2WD) and B7200D (4WD). The Kubota
B7200 powertrain system components: a 56.6 cu.in (0.9L) Kubota D950 4-cycle
vertical three-cylinder naturally aspirated liquid-cooled diesel engine with a
rated power of 17 hp (12.7 kW), and unsynchronized transmission with 6 forward
and 2 reverse gears.
Max forward speed - 8 mph (12.8 kph), max reverse speed - 4 mph (6.4
kph). The open center hydraulic system includes a gear pump with a flow
rate of 4 gallons per minute (15.1 liters per minute). The hydraulic
system pressure is 113 bar (1640 psi). The 2-wheel drive models are
equipped with 5.00x10 (AG) or 18x9.50-8 (Turf) front tires and 8.00x16
(AG) or 29x12.00-15 (Turf) rear tires. The 6.00x12 (AG) or 20x8.00-10
(Turf) front tires and 8.00x16 (AG) or 31x13.50-15 (Turf) rear tires are
used for tractors with 4-wheel drive. The wheel base is 55.1" (1390 mm).
The Kubota B7200 is compatible with the following attachments: a 60"
mid-mount 3-blade Kubota RC60-72 mower deck with cutting height of
1.5-4.0 in (38-102 mm), 48" rear-mount Kubota B3538 finish mower, 51"
front-mount dual-stage Kubota B2551 snowblower with hydraulic lift,
Kubota B1630C front-end loader with lift capacity to full height of 510
lbs (231 kg), or Kubota B1640A front-end loader with lift capacity to
full height of 510 lbs (231 kg).
| Engine Troubleshooting |
| Engine will not start or hard to start |
| Clogged fuel filter element - Replace the filter element |
| Fuel shut-off valve closed - Open the fuel shut-off valve |
| There is air in the fuel system - Bleed the system |
| Dirty or faulty injectors - Inspect fuel injectors and replace if necessary |
| Fuel injection pump damage - Rebuild or change fuel pump |
| Poor cylinder compression - Check cylinder block and replace defective parts |
| Engine stops running unexpectedly |
| Engine is not fully warmed up - Normalize the temperature by warming up the engine |
| Air in fuel pipes - Bleed fuel pipes |
| Uneven fuel injections - Repair or adjustment |
| Fuel filter is dirty - Change filter element |
| Fuel injectors are damaged or dirty - Test fuel injectors and change if necessary |
| Engine starts but immediately shuts off |
| Incorrect setting of fuel injection pump timing - Check the fuel injection pump timing setting |
| Dirty fuel filter element - Change filter element |
| Clogged or damaged injector nozzles - Test injector nozzles and replace as required |
| Fuel injection pump damage - Rebuild or change fuel pump |
| Air cleaner is dirty - Replace or clean the air cleaner element |
| Engine stops while idling |
| Incorrect low idle setting - Test and adjust |
| Fuel injection pump is not working correctly - Change pump or rebuild it |
| Clogged or damaged injector nozzles - Service or replace injector nozzles |
| Valve out of adjustment - Adjust valve clearance |
| Insufficient coolant fluid - Fill the radiator to the required level. Inspect the system for leaks |
| Cooling system parts are failed or system is clogged - Replace faulty parts or flush the cooling system |
| Engine oil level is low - Need to add engine oil |
| Broken fan belt or incorrect belt tension - Adjust as required or change belt |
| Thermostat failure - Thermostat needs to be replaced |
| Dirty or damaged injectors - Service or change fuel injectors |
| Improper fuel injection pressure - Correct the pressure settings |
| Air filter clogging - Replace or clean the air filter element |
| Oil filter is dirty - Replace or clean engine oil filter element |
| Engine overload - Reduce the load or use a lower gear |
| The valve clearance is incorrect - Have it adjusted |
| Incorrect low idle setting - Test and adjust |
| Fuel pipes or hoses are clogged - Service fuel hoses and pipes |
| Poor engine compression: Valves are broken or leaking - Change the valves |
| Engine knocking sound or abnormal noise |
| Incorrectly set fuel injection pump timing - Correct injection timing |
| Fuel injector nozzles are damaged or dirty - Install new set of properly balanced nozzles |
| Engine oil level is low - Check and refill engine oil |
| Engine is cold - Warm up engine as required |
| Worn crankshaft or main bearings - Repair or replace defective parts |
| Piston rings are defective or broken - Piston rings need to be replaced |
| Loose flywheel screws - Check the flywheel screws and tighten as required |
| Excessive oil consumption |
| Oil leaking: Gaskets or seals can be faulty - New components need to be installed |
| Incorrect oil viscosity - Fill up with the proper oil viscosity |
| Piston rings are defective or worn - Install new piston rings |
| Worn valve stems and valve guides - Valves must be replaced |
| Worn cylinder liners or pistons - Check liners and pistons, install new components as required |
| Electrical System Troubleshooting |
| Battery cannot be charged |
| Dead cell in battery - Battery change required |
| Bad battery electrical wire harness - Check wires for malfunctions, repair or replace |
| Loose or corroded battery terminals and cables - Tighten or clean terminals and cables |
| Improper belt tension adjustment or damaged belt - Replace belt or correctly adjust belt tension |
| Low battery voltage - Recharge the battery |
| Battery won’t hold charge - Service charging system or install new battery |
| Battery electrical wire harness damage - Check battery wires for damage, replace or change |
| Corroded or loose terminals and cables - Cables and terminals must be tightened or cleaned |
| Battery capacity is low - Battery needs to be recharged |
| Discharged or worn battery - Replace or charge as required |
| Starter motor failing - Starter should be replaced |
| Improperly connected or disconnected wiring harness - Inspect wiring harness and connect properly |
| Transmission Troubleshooting |
| Difficult to shift gears |
| Clutch is not adjusted or faulty - Change or adjust clutch |
| Gear shift linkage is stuck or worn - Service or change the shift linkage |
| Worn or damaged shift forks - Shift forks need to be changed |
| Defective gearshift mechanism - Replace defective components |
| Transmission fluid pressure is insufficient |
| Not enough fluid in transmission - Fill the transmission housing with fluid |
| Transmission oil filter clogging (if fitted) - Replace or clean transmission oil filter |
| Faulty relief valve - Replace relief valve |
| Excessive transmission noise |
| Bearings are worn or damaged - Bearings need to be replaced |
| Low transmission fluid level - Fill system with correct transmission fluid level |
| Contaminated transmission fluid - Transmission fluid must be changed |
| Gears are worn or backlash is improper - Replace gears or set backlash correctly |
| Shift forks are damaged or worn - Install new shift forks |
| Gaskets or seals are broken - Install new seal or gaskets |
| Transmission case is cracked - Replace case or transmission assembly |
| Hydraulics Troubleshooting |
| Hydraulic system overheating |
| Hydraulic system pressure is incorrect - Hydraulic pressure needs to be set correctly |
| Defective or misadjusted main relief valve - Adjust or change relief valve |
| Dirty hydraulic fluid - The fluid must be changed |
| Air enters in hydraulic system - Check the pump seals, suction line, and fittings |
| Insufficient hydraulic fluid pressure |
| Not enough hydraulic fluid in the system - Check and refill the hydraulic fluid |
| Hydraulic fluid filter element is dirty - Change hydraulic filter element or clean if necessary |
| Hydraulic pump is faulty - Test pump performance and replace pump if necessary |
| Hydraulic spool valve block is not set properly or defective - Change or set correctly |
| Faulty hydraulic cylinder - Check cylinder components for wear or damage and change if necessary |
| Hydraulic pipes are leaking - Inspect hydraulic system for leaks and repair it |
| 3-point hitch lifts slowly or won't lift |
| Not enough hydraulic fluid in the system - Need to add fluid |
| Cold hydraulic oil - Warm up the oil |
| Hydraulic oil filter element is dirty - Install a new hydraulic filter element |
| Faulty hydraulic oil pump - Check the pump performance and replace it if required |
| Unadjusted or defective main relief valve - Replace or set up the relief valve |
| Defective or incorrect setting hydraulic control valve block - Adjust properly or replace |
| Hydraulic cylinder is broken - Check cylinder parts for wear or damage and replace if necessary |
| Damaged or loose suction line - Tighten or change |
| 3-point hitch lowers slowly or won't lower |
| Hydraulic spool valve block is defective or set improper - Replace or set correctly |
| Hydraulic cylinder malfunction - Check cylinder parts for wear or damage and replace if necessary |
| Damaged hitch rock shaft - Change the shaft |
| The hitch is defective if there is internal mechanical damage - Replace damaged or worn hitch components |
| Three-point hitch raises or lowers not smoothly |
| Air leaks in hydraulic system - Inspect the suction pipe, fittings, and pump seals |
| Dirty hydraulic oil - The oil must be changed |
| Defective hydraulic pump - Check the pump capacity and replace pump if required |
| Defective or not adjusted hydraulic spool valve - Change or adjust properly |
| Defective hydraulic cylinder - Inspect cylinder components for wear or damage and change if required |
| 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 |
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| Farm Tractors Technical Specifications |
