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Case IH DX45 Troubleshooting

The Case IH DX45 is a 4WD compact utility tractor. This model was manufactured from 2001 to 2006. The components of Case IH DX45 powerline system: a 135.2 cubic inches (2.2 L) Shibaura N844L 4-cylinder liquid-cooled diesel engine with a rated power of 45 hp (33.6 kW), and two-range hydrostatic transmission with infinite forward and reverse gears.

The maximum travel speed (forward/reverse): 13.6 mph (21.9 km/h). The open center hydraulic system includes an implement pump with rated fluid flow of 9.8 gal/min (37.1 l/min) and steering pump with rated fluid flow of 5.1 gal/min (19.3 l/min). The Case IH DX45 is equipped with a hydrostatic power steering system, wet disc brakes, 8.00x16 or 27x8.50-15 front tyres, and 14.9x24 or 44x18.0-20 rear tyres.

The wheelbase is 73.5 in (1860 mm). The tractor is compatible with a 84" mid-mount 4-blade Case IH MWX84R mower deck with cutting height of 2.0-4.0 in (51-102 mm), and Case IH L160 loader with lift capacity to full height of 2000 lbs (907 kg).

Engine Troubleshooting
Engine starts up hard or won't start

Air in the fuel lines - Bleed the fuel lines.
Dirty fuel filter - Clean the filter element.
Fuel injection nozzles are clogged or faulty - Install a new kit of correctly balanced nozzles.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve clearance is wrong - Adjust to proper valve clearance.
Damaged fuel injection pump - Replace injection pump or repair it.

Engine starts but then stalls

Air filter plugged - Clean or change the filter.
Clogged fuel filter - Clean or replace the filter.
Fuel injection pump is leaking - Repair any leaks.
Clogged or defective injectors - Clean or replace fuel injectors.
Fuel injection pump failure - Rebuild or replace pump.

Engine shuts off suddenly while running

Engine is not preheated - Normalize the temperature by warming up the engine.
Clogged fuel filter - Change filter element.
Air in fuel system - Bleed fuel system.
Fuel injection nozzles are clogged or faulty - Replace injection nozzles.
Improper setting of fuel injection pump timing - Use the correct fuel injection pump timing adjustment.

Engine shuts off while idling

Incorrectly set low idle speed - Need to adjust idle speed.
Fuel injection pump is not working correctly - Replacement or repair required.
Defective fuel injectors - Clean fuel injectors or change it.
Incorrect valve clearance - Check and adjust as required.

Reduced engine power

Air filter is dirty - Air filter maintenance required.
Defective or clogged injection nozzle - Check and replace nozzles if required.
Uneven fuel injection pressure - Adjust pressure to proper level.
The valve clearance is incorrect - Correct valve clearance needs to be set.
Incorrectly set low idle speed - Need to adjust idle speed.
Fuel hoses or lines clogging - Fuel lines and hoses need to be cleaned.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Piston rings are damaged or leaking - Piston rings need to be replaced.

Engine overheating

Engine coolant is insufficient - Refill to the correct level and inspect system for leaks.
Insufficient engine oil - Need to add engine oil.
Faulty radiator cap or dirty radiator fins - Change cap or clean radiator.
Broken or loose fan belt - Change as required.
Engine overloaded - Load reducing is recommended.

Low oil pressure

Low crankcase oil level - Fill crankcase to proper oil level.
Oil filter element clogged - Replace or service engine oil filter.
Incorrect oil viscosity - Use oil of correct viscosity.
Incorrect oil clearance in main bearing - Bearing needs to be changed.
Oil pump is defective - Install a new pump.

Engine noises or knocks

Low engine oil level - Checking oil level and add if necessary.
Engine is not warmed up to the required temperature - Engine is not warmed up to the required temperature.
Fuel injection pump timing is not adjusted - Adjust as recommended.
Low idle speed set incorrectly - Adjust as required.
Damaged or clogged injectors - Replace fuel injectors.
Connecting rod is defective or misaligned - Align or change connecting rod.
Pistons are worn or broken - Have pistons replaced.

Hydrostatic Transmission Troubleshooting
Hydrostatic transmission noise

Transmission oil is contaminated or oil level is insufficient - Fill to required level or change the transmission oil.
Speed control pedal linkage is damaged or out of adjustment - Adjust or repair linkage.
Stuck relief valve - Install a new valve.
Transmission is under excessive load - Load needs to be reduced.
Worn or defective parts of the hydrostatic transmission - Change or repair defective parts.

Power is too low

Low oil level - Fill the transmission housing with oil.
Relief valve failure - Replace relief valve.
Worn or out of adjustment speed control linkage - Adjust or change linkage.

Transmission oil overheats

Low oil level - Fill the transmission housing with oil.
Plugged transmission oil filter - Clean or change transmission oil filter.
Cooling components are defective or plugged - Check all cooling components and repair or change if required.
Transmission is under excessive load - Reduce loading.

External fluid leaks

Seals or gaskets are broken - Gaskets or seal replacement required.
Transmission case internal pressure is too high - Replace worn components.
Plugged transmission fluid return tube - Service or replace return tube.

Hydraulic System Troubleshooting
Low hydraulic fluid pressure

Hydraulic fluid is insufficient - Fill the system to proper hydraulic fluid level.
Dirty hydraulic fluid filter - Service the hydraulic filter or change if required.
Faulty hydraulic pump - Replace or repair hydraulic fluid pump.
Hydraulic control valve is not set properly - Adjust properly.
Hydraulic cylinder is faulty - Install a new hydraulic cylinder or repair it.
Leaks in hydraulic lines - Check the system and repair leaks.

Hydraulic system overheated

Faulty main relief valve - Install a new relief valve.
Hydraulic fluid type is incorrect - Pour the correct type of fluid.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Air in the hydraulic system - Air bleeding.

3-point hitch won't lift or lifts slowly

Hitch is under excessive load - Reduce loading.
Hydraulic oil level low - Checking hydraulic oil level and add if necessary.
Dirty hydraulic fluid filter - Clean the hydraulic filter or install new filter element.
Hydraulic pump not working - Replace or repair hydraulic fluid pump.
Defective main relief valve - Replace relief valve.
Hydraulic spool valve is damaged - Change or repair hydraulic valve.
Hydraulic cylinder is broken - Replace or repair hydraulic cylinder.
Loose or broken suction line - Tighten the pipe or replace it.

3-point hitch cannot be lowered or lowering is too slowly

Hydraulic control valve block is set improperly - Set properly.
Hydraulic cylinder not working - Replace or repair hydraulic cylinder.
3-point hitch is out of adjustment - Adjust the hitch.
Hitch cross shaft is damaged - Change the shaft.

Hitch drop or lift is jerky

There is air in the hydraulic system - Bleed hydraulic system.
Contaminated hydraulic oil - Change hydraulic oil.
Hydraulic pump is defective - Install a new hydraulic fluid pump.
Faulty hydraulic spool valve - Repair or change hydraulic valve.
Hydraulic cylinder is faulty - Install a new hydraulic cylinder or repair it.

Steering Troubleshooting
Difficult steering

Worn or incorrectly fitted steering column - Replace the steering column or refit it correctly.
Air in steering system - Air-bleed steering system.
Not adjusted toe-in - Adjust toe-in properly.
Tire pressure is uneven - Adjust the tire pressure.
Hydraulic steering pump is defective - Repair or change steering pump.
Stuck or damaged steering pump control valve - Clean or replace control valve.
Insufficient steering fluid - Fill up the steering fluid.

Steering wheel free play is excessive

Steering column shaft or coupling is worn out - Change defective part.
Defective hydraulic steering pump - Install a new hydraulic steering pump.
Worn or loose steering linkage assembly - Change or repair steering linkage.

Front wheels wander to left or right

Uneven tyre pressure - Inflate the tyres properly.
Incorrect toe-in - Check toe-in and correct.
Worn or loose steering linkage joints - Replace or repair steering linkage.
Front wheel bearings are damaged or incorrectly adjusted - Replace or adjust the bearings correctly.

Electrical Troubleshooting
Battery does not charge

Loose or corroded electrical wiring connections - Tighten or service connections.
Battery terminal connectors are faulty - Change terminal connectors.
Battery failing - Battery change required.
Defective or loose belt - Change belt or adjust belt tension.

Starter motor turns slow

Battery voltage is low - Battery is drained, charge it.
Battery won’t hold charge - Service charging system or change battery.
Disconnected wires or corroded battery terminals - Check cable connections and change or clean terminals.

Starter does not work

Battery is drained or worn - Change or recharge battery.
Battery wiring is disconnected or improperly connected - Inspect wiring and connect as required.
Low battery power - Low battery charging, charge as required.
Defective starter motor - Repair or replace starter.



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