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Case IH 7250 Magnum Troubleshooting

The Case IH 7250 is a 4WD (4x4) row-crop tractor from Magnum 7200-series. This model was manufactured between 1994 and 1996. The components of Case IH Magnum 7250 powerline system: a 505 cubic inches (8.3 L) Case-International 6TA-830 6-cylinder turbocharged intercooled diesel engine with a rated power of 262.3 hp (194.2 kW), and full powershift transmission with 18 forward and 4 reverse gears or creeper transmission with 24 forward and 6 reverse gears.

The maximum travel speed (forward/reverse): 20.4 mph (32.8 km/h) and 7.4 mph (11.9 km/h). The closed center (PFC) hydraulic system includes a piston pump with rated fluid flow of 22 gal/min (83.3 l/min). The hydraulic pressure is 160 bar (2300 psi). The Case IH Magnum 7250 is equipped with a hydrostatic power steering, differential hydraulic wet disc brakes, 16.9x28 front tyres, and 20.8R38 rear tyres. The wheelbase is 118.3 inches (3000 mm).

Diesel Engine Troubleshooting
Engine difficult to start or will not start

Air in the fuel lines - Bleed the fuel lines.
Clogged fuel filter - Clean or change the filter.
Defective or clogged injection nozzle - Check and replace nozzles if required.
Water or dirt in fuel system - Drain, flush, and service the system.
The valve clearance is not adjusted - Adjustment procedure required.
Damaged fuel injection pump - Replace or rebuild injection pump.

Diesel starts but immediately stops

Intake air restriction - Service or replace the air filter.
Fuel filter plugging - Change the filter element.
Poor fuel injection pump tightness - Look for any leaks of fuel pump Tighten it fast.
Clogged or defective injectors - Inspect fuel injectors and change as required.
Fuel injection pump is defective - Replace injection pump or repair it.

Diesel shuts off while driving

Low coolant temperature - Engine is not warmed up to the required temperature.
Fuel filter plugged - Service or replace the filter.
Air in the fuel system - Air bleeding.
Clogged or defective injection nozzles - Test injection nozzles and change if necessary.
Improper setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.

Engine shuts off while idling

Low idle speed setting is not correct - Normalize low idle speed.
Defective fuel injection pump - Replace or rebuild injection pump.
Fuel injector fault - Clean fuel injectors or change it.
Valve out of adjustment - Adjust valve clearance according to specifications.

Engine power is insufficient

Clogged air filter - Service air cleaner.
Fuel injection nozzles are damaged - If necessary, replace with a new nozzle.
Improper fuel injection pressure - Adjust to proper pressure.
The valve clearance is incorrect - Need to adjust valve clearance.
Incorrectly adjusted low idle speed - Adjust the low idle speed.
Dirty fuel hoses or lines - Clean fuel system hoses and lines.
Defective cylinder head gasket - Install new cylinder head gasket.
Damaged or leaking piston rings - Piston rings replacement required.

Engine is overheated

Not enough coolant - Add coolant and check the components of cooling system.
Not enough engine oil - Need to add engine oil.
Defective radiator cap or clogged radiator fins - Clean radiator or replace cap.
Fan belt is broken or worn - Change as required.
Diesel engine is overloaded - Reduce engine load.

Oil pressure is insufficient

Engine oil level low - Check oil level and add oil as required.
Oil filter is dirty - Change or service engine oil filter.
Wrong oil viscosity - Use proper viscosity oil.
Incorrect crankshaft bearing oil clearance - Bearings need to be reinstalled.
Worn oil pump - Inspect and change as required.

Engine knocking or noise

Not enough engine oil - Fill up the engine oil.
Engine is cold - Warm up the engine.
Fuel injection pump timing is wrong - Adjust the pump as required.
Incorrectly adjusted low idle speed - Correct low idle adjustment.
Defective fuel injectors - Clean or replace fuel injectors.
Connecting rod is defective or misaligned - Need to align or replace the connecting rod.
Pistons are broken or worn - Pistons need to be replaced.

Transmission Troubleshooting
Low transmission fluid pressure

Insufficient transmission oil - Fill the transmission housing to proper oil level.
Transmission oil filter is clogged (if fitted) - Service or replace the transmission oil filter.
Defective relief valve - Install a new valve.

Transmission is excessively noisy

Insufficient transmission fluid - Need to add transmission fluid.
Transmission oil contamination - Fill up with fresh transmission oil.
Improper backlash or worn gears - Adjust backlash properly or replace the gears.
Worn or cracked bearings - Faulty bearings should be replaced.
Worn or bent gear shift forks - Shift forks need to be replaced.
Shaft splines are stuck or worn out - Change the shaft.

Difficulty shifting gears

Gear shift linkage is rusty or worn - Change or lubricate shift linkage.
Worn or bent shift forks - Replace defective shift forks.
Gear shifting mechanism is defective - Defective parts must be replaced.
Unadjusted or worn clutch - Adjust or replace the clutch.

Transmission fluid leaks

High transmission fluid level - Drain the excess fluid.
Broken seals or gaskets - Install new gaskets or seal.

Hydraulic System Troubleshooting
Hydraulic fluid pressure is low

Hydraulic oil is insufficient - Need to add oil.
Clogged hydraulic fluid filter - Service the hydraulic filter or change if required.
Faulty hydraulic pump - Repair or replace hydraulic fluid pump.
Not adjusted hydraulic control valve - Need to adjust.
Damaged hydraulic cylinder - Change or repair hydraulic cylinder.
Leaks in hydraulic lines - Inspect the system for leaks and fix it.

Hydraulic system overheated

Main relief valve is damaged - Change relief valve.
Wrong type of hydraulic oil - Pour the correct type of hydraulic oil.
Hydraulic fluid is dirty - Hydraulic fluid change required.
Air in hydraulic lines - Bleed hydraulic lines.

Hitch not lifting or hitch lifts slowly

Excessive loading on the hitch - The load should be reduced.
Low hydraulic oil level - Need to add oil.
Clogged hydraulic oil filter - Hydraulic filter maintenance required.
Hydraulic pump is faulty - Replace or repair hydraulic fluid pump.
Main relief valve is defective - Relief valve replacement required.
Hydraulic control valve block is damaged - Install a new valve or repair it.
Defective hydraulic cylinder - Replace or repair hydraulic cylinder.
Loose or broken suction pipe - Retighten or replace pipe.

3-point hitch can't drop or drops too slowly

Hydraulic control valve block is out of adjustment - Control valve needs to be adjusted.
Hydraulic cylinder failure - Repair or install a new hydraulic cylinder.
3-point hitch is out of adjustment - The 3-point hitch must be adjusted.
Lift arm shaft is damaged - Install a new shaft.

Hitch lift or drop is not smoothly

Air in hydraulic lines - Bleed hydraulic lines.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Hydraulic pump is faulty - Change or repair hydraulic fluid pump.
Faulty hydraulic spool valve - Change or repair hydraulic valve.
Hydraulic cylinder not working - Replace or repair hydraulic cylinder.

Steering System Troubleshooting
Steering wheel is very heavy to turn

Incorrectly installed or worn steering column - Install the steering column correctly or replace it.
Air lock in hydraulic steering system - Bleed the system of air.
Improper toe-in - Check toe-in and correct.
Tire pressure uneven - Inflate the tires correctly.
Worn steering pump - Install a new steering pump.
Steering pump control valve is faulty or stuck - Replace or service control valve.
Insufficient steering fluid - Fill up the steering fluid.

Excessive steering wheel play

Steering column coupling or shaft has maximum wear - Change defective component.
Steering pump stopped working - Replace or repair steering pump.
Steering linkage components are loose or worn - Check and replace as required.

Tractor is pulling to left or right

Front tires are worn unevenly - Install new tires.
Incorrect toe-in - Check toe-in and correct.
Steering linkage components are loose or worn - Change or repair steering linkage.
Defective or improperly adjusted front wheel bearings - Adjust correctly or replace bearings.

Electrical Troubleshooting
Battery cannot be charged

Corroded or loose cable connections - Service or tighten connections.
Defective battery terminal connectors - Terminal connectors need to be changed.
Battery dead cell - Battery replacement required.
Loose or defective belt - Belt needs to be adjusted or replaced.

Starter turning slow

Battery capacity is low - Battery is drained, recharge it.
Battery drains quickly - Service battery or replace it.
Bad terminals or disconnected battery cables - Connect wires correctly or change terminals.

Starter does not work

Battery is discharged or defective - Charge or replace the battery.
Wire harness is disconnected or incorrectly connected - Check wire harness and connect as required.
Battery power is low - Battery is drained, recharge it.
Starter motor is damaged - Starter should be changed.



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