________________________________________________________________________________

Kubota B7300 Troubleshooting

Kubota B7300 Diesel Engine Troubleshooting

Engine starts hard or doesn't start: Fuel filter element clogging. Install new filter element. Air in fuel system. Bleed fuel system. Faulty or dirty injection nozzles. Clean or replace injection nozzles. Fuel injection pump is broken. Repair or install a new fuel pump.

Engine shuts off while running: Fuel injection pump timing is not adjusted. Adjust according to specifications. Fuel filter plugged. Service or replace the filter. Engine is not preheated. Warm up the engine.

Diesel starts but immediately shuts off: Clogged fuel filter. Service or replace the filter. Fuel injection pump malfunction. Replace or repair injection pump. Plugged air filter. Replace air filter element.

Engine is overheated: Defective radiator cap or clogged radiator core. Replace cap or clean radiator. Engine coolant is insufficient. Add coolant and check the components of cooling system. Loose or defective fan belt. Fan belt must be replaced. Engine oil level is low. Check and refill engine oil.

Poor engine power: Fuel injection nozzles are faulty or clogged. Check injection nozzles and replace if required. Dirty fuel lines or hoses. Fuel hoses and lines must be clean. Air filter element clogged. Clean or change the filter. Cylinder-head gasket is leaking. Gasket should be replaced.

Abnormal engine noise or knocking: Engine is not preheated. Warm up engine as required. Low engine oil level. Fill up the oil to required level. Wrong setting of fuel injection pump timing. Check the fuel injection pump timing adjustment. Pistons are worn or scored. Replace the pistons. Connecting rod is not aligned or defective. Align or replace connecting rod.

Engine stalling at idle: Incorrect low idle speed adjustment. Correct low idle settings. Valve out of adjustment. Adjust valve clearance. Faulty fuel injection pump. Rebuild or install a new injection pump.

Low oil pressure: Low oil level. Check and refill the oil. Oil pump is defective. Install a new pump. Clogged oil filter element. Clean or replace engine oil filter element.

Kubota B7300 Hydrostatic Transmission Troubleshooting

Excessive HST transmission noise: Speed control pedal linkage is bent or not adjusted. Repair or adjust linkage. Transmission overloaded. Load needs to be reduced. Contaminated transmission fluid or low fluid level. Top up to proper level or change transmission fluid. Stuck relief valve. Install a new valve. Defective or worn transmission parts. Replace or repair defective components.

Transmission oil overheating: Transmission overload. Reduce loading. Plugged or defective cooling components. Check all cooling components and change or repair if required. Transmission fluid insufficient. Fill the transmission housing to proper fluid level. Plugged transmission oil filter. Clean or change transmission oil filter.

Low power: Low oil level. Check and refill the transmission oil. Relief valve malfunction. Replace the valve. Speed control pedal linkage is damaged or out of adjustment. Adjust or repair linkage.

Transmission fluid leaks: Clogged oil drain line. Clean or replace drain line. Damaged gaskets or seals. Gaskets or seal need to be replaced. High internal transmission housing pressure. Change defective components.

Kubota B7300 Hydraulic System Troubleshooting

Hydraulic system overheats: Wrong hydraulic oil type. Fill up with the correct type of oil. Hydraulic oil is contaminated. Fill up with fresh hydraulic oil. Air in hydraulic system. Bleed air from hydraulic system. Faulty main relief valve. Relief valve must be changed.

Low hydraulic fluid pressure: Low hydraulic fluid level. Fill the system to proper hydraulic fluid level. Hydraulic oil filter element is clogged. Hydraulic filter maintenance required. Hydraulic piping is leaking. Inspect the system for leaks and fix it. Hydraulic control valve is out of adjustment. Need to make adjustment. Damaged hydraulic pump. Replace or repair hydraulic fluid pump. Hydraulic cylinder malfunction. Repair or install a new hydraulic cylinder.

Hitch not lifting or hitch lifts slowly: Hydraulic pump not working. Repair or replace hydraulic fluid pump. Damaged main relief valve. Replace relief valve. Hydraulic spool valve is defective. Replace or repair the valve. Hydraulic cylinder is defective. Install a new hydraulic cylinder or repair it. Insufficient hydraulic fluid. Fill up the hydraulic fluid. Clogged hydraulic oil filter element. Change the hydraulic filter element or service if required. Excessive hitch loading. Load needs to be reduced.

Hitch won't drop or drops slowly: Hydraulic cylinder is faulty. Install a new hydraulic cylinder or repair it. Hydraulic control valve is set improperly. The control valve must be set correctly. Worn lift arm shaft. Install a new shaft. The three-point hitch is not adjusted. Need to make adjustments.

3-point hitch jerks when lower or lift: Contaminated hydraulic oil. Change hydraulic oil. Hydraulic pump is defective. Change or repair hydraulic fluid pump. Air in hydraulic lines. Bleed hydraulic lines. Defective hydraulic control valve block. Repair or replace the valve. Damaged hydraulic cylinder. Replace or repair hydraulic cylinder.

Kubota B7300 Steering System Troubleshooting

Excessive play in steering: Steering column shaft or bearing is worn out. Replace faulty parts. Worn or loose steering linkage joints. Replace or repair steering linkage. Steering gear box bearings are worn. Replace the bearings. Identify faulty parts and replace as required.

Stiff steering: Steering column shaft or knuckle is stuck. Replace knuckle and steering column if faulty. Steering box components are worn out. Repair steering gearbox. Tie rod or drag link is faulty. Change or repair. Lack of lubricant in steering gearbox. Fill the steering gearbox with lubricant. Improper toe-in alignment. Uneven wear on front tire. Replace the tires.

Tractor pulls to left or right: Steering linkage assembly is worn or loose. Replace or repair steering linkage. Steering knuckle bushing is worn. Knuckle bushing must be replaced. Front tires are worn unevenly. Install new tires. Not adjusted toe-in. Adjust toe-in correctly.

Kubota B7300 Electrical Troubleshooting

Battery is not charging: Wiring connections are loose or corroded. Tighten or clean electrical wiring connections. Defective electrical terminal connectors. Terminal connectors need to be changed. Worn-out battery. Install a new battery. Belt is worn or loose. Install a new belt or adjust belt tension.

Starter motor cranks slow: Low battery capacity. Battery needs to be recharged. Battery drains quickly. Service charging system or install new battery. Bad terminals or disconnected battery cables. Check cables and clean or change terminals.

Starter doesn't crank: Battery is discharged or worn. Battery needs to be recharged or replaced. Disconnected or incorrectly connected wires. Inspect battery wires and connect correctly. Low battery capacity. Battery is drained, charge it. Starter motor failure. Repair or install a new starter.