Home / Farm Tractors / Case IH Tractors / Case IH 745XL

Case IH 745 XL Troubleshooting

The Case IH 745 XL utility tractor was manufactured between 1985 and 1990. The Case IH 745XL tractor is powered by 239 cu.in (3.9 L) IH D-239 4-cylinder liquid-cooled diesel engine with a rated power of 72 hp (53.7 kW).

The Case IH 745 XL is fitted with a 2 types of transmission. Type 1: IH Total-Synchron 2-speed powershift transmission with 16 forward and 8 reverse gears. Type 2: Gear transmission with 8 forward and 4 reverse gears. The maximum travel speed (forward/reverse): 18.6 mph (29.9 kph) and 10.8 mph (17.3 kph).

The open center hydraulic system has a gear pump with a rated capacity of 8.7 gpm (32.9 lpm). The hydraulic system pressure is 175 bar (2540 psi). The tractor is equipped with a hydrostatic power steering, wet disc brakes, 7.50x18 (2WD) or 12.4x24 (4WD) front tyres, and 16.9x34 rear tyres. The wheelbase is 94.1" (2390 mm) for 2WD models and 92.5" (2340 mm) for 4WD models.

Diesel Engine Troubleshooting
Engine difficult to start or won't start

Air in fuel system - Bleed fuel system.
Fuel filter plugged - Replace the filter element.
Clogged or defective injection nozzles - If necessary, replace with a new nozzle.
Water or dirt in fuel system - Drain, flush, and service the system.
Excessive valve clearance - Check and adjust as required.
Damaged fuel injection pump - Rebuild or replace pump.

Diesel starts and suddenly stops

Clogged air cleaner - Change air filter element.
Clogged fuel filter - Clean the filter element.
Poor fuel injection pump tightness - Look for any leaks of fuel pump Tighten it fast.
Fuel injectors are dirty or defective - Replace fuel injectors.
Defective fuel injection pump - Replacement or repair required.

Engine stalls after running

Low coolant temperature - Normalize the temperature by warming up the engine.
Fuel filter plugging - Replace the filter element.
Air in the fuel pipes - Bleed the fuel pipes.
Clogged or burnt injection nozzle - Test injection nozzles and change if necessary.
Incorrect adjustment of fuel injection pump timing - Set it up as required.

Engine stops when idle

Low idle speed setting is incorrect - Adjust low idle speed.
Fuel injection pump malfunction - Replacement or repair required.
Damaged or clogged injectors - Replace or clean fuel injectors.
Incorrect valve clearance - Adjustment procedure required.

Diesel engine is losing power

Air cleaner is dirty - Clean or replace the element.
Fuel injection nozzles fault - Check and replace nozzles if required.
Uneven fuel injection pressure - Test fuel injection pressure and adjust it correctly.
Improper valve clearance - Check and adjust as required.
Incorrectly set low idle speed - Correct low idle settings.
Restricted fuel hoses or lines - Service fuel hoses and lines.
Worn cylinder head gasket - Replace the gasket as required.
Leaking or defective piston rings - Install new piston rings.

Engine overheating

Low engine coolant - The cooling system needs to be refilled and checked for faults.
Insufficient engine oil - Add oil to the engine crankcase.
Radiator core is dirty or radiator cap is damaged - Clean radiator or install new cap.
Loose or defective fan belt - Fan belt must be replaced.
Engine is overloaded - Reduce load on the engine.

Oil pressure is insufficient

Low crankcase oil level - Fill crankcase to proper oil level.
Oil filter clogged - Replace or clean engine oil filter element.
Improper type of engine oil - Use the specified type of engine oil.
Excessive oil clearance of crankshaft bearing - Change bearings.
Worn oil pump - Inspect and change as required.

Abnormal engine knocking or noise

Engine oil level low - Need to add engine oil.
Engine not warmed up - Warm up to required temperature.
Improper fuel injection timing - Set up as recommended.
Low idle speed set incorrectly - Adjust low idling as recommended.
Fuel injector fault - Change or clean fuel injectors.
Connecting rod is worn or not aligned - Connecting rod must be aligned or replaced.
Worn or scored pistons - Install new pistons.

Transmission Troubleshooting
Transmission oil pressure is insufficient

Insufficient transmission fluid - Need to add transmission fluid.
Transmission oil filter is clogged (if fitted) - Service or change transmission oil filter.
Defective relief valve - Change relief valve.

Transmission noises

Insufficient transmission oil - Add oil to the transmission housing.
Transmission oil contamination - Fill up with fresh transmission oil.
Gears are damaged or backlash is incorrect - Replace gears or adjust backlash correctly.
Worn or broken bearings - Replace the bearings.
Damaged or worn gear shift forks - Shift forks need to be replaced.
Worn or damaged shaft splines - Shaft need to be changed.

Hard shifting

Rusty or worn gear shift linkage - Lubricate or replace shift linkage.
Worn or damaged gear shift forks - Replace the shift forks.
Gear shifting mechanism is defective - Defective parts must be replaced.
Worn or unadjusted clutch - Clutch adjustment or replacement required.

Transmission fluid leaking

Transmission oil level is high - Correct the oil volume.
Damaged seals or gaskets - Seals and gaskets need to be replaced.

Hydraulics Troubleshooting
Hydraulic fluid pressure too low

Low hydraulic fluid level - Fill up the hydraulic fluid.
Hydraulic oil filter is clogged - Clean or replace the hydraulic filter.
Damaged hydraulic pump - Change or repair hydraulic fluid pump.
Incorrect setting hydraulic control valve block - Set correctly.
Hydraulic cylinder not working - Repair or change hydraulic cylinder.
Leaks in hydraulic lines - Identify leaks in the system and repair it.

Hydraulics overheating

Main relief valve is faulty - Change relief valve.
Improper hydraulic oil type - The proper type of hydraulic oil must be used.
Hydraulic fluid contamination - Change hydraulic fluid.
Air in the hydraulic system - Air bleeding.

Hitch can't lift or lifts too slowly

Heavy load on the hitch - Load needs to be reduced.
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Clogged hydraulic fluid filter - Replace filter element or clean if required.
Hydraulic pump malfunction - Change or repair hydraulic fluid pump.
Main relief valve malfunctioning - Relief valve need to be replaced.
Hydraulic control valve block is faulty - Repair or replace the valve.
Hydraulic cylinder is faulty - Change or repair hydraulic cylinder.
Suction line is loose or broken - Replace or repair.

Hitch not lowering or hitch lowers slowly

Hydraulic control valve block is not set properly - Use the proper setting.
Broken hydraulic cylinder - Repair or change hydraulic cylinder.
The 3-point hitch is not adjusted - Adjust 3-point hitch as required.
Damaged lift arm shaft - Install a new shaft.

Hitch lift or lower is jerky

Air in hydraulic pipes - Bleed hydraulic pipes.
Hydraulic oil contamination - Change the oil.
Hydraulic pump malfunction - Install a new hydraulic oil pump.
Defective hydraulic spool valve - Replace or repair the valve.
Hydraulic cylinder malfunction - Replace or repair hydraulic cylinder.

Steering Troubleshooting
Difficult steering

Damaged or incorrectly assembled steering column - Replace steering column or assemble correctly.
Air in steering system - Air-bleed steering system.
Incorrect toe-in - Adjust toe-in wheels.
Front tires wear unevenly - Change the tires.
Damaged hydraulic steering pump - Steering pump needs to be repaired or replaced.
Pump flow control valve is worn or stuck - Service or replace flow control valve.
Lack of steering oil - Fill the steering system with oil.

Steering wheel has too much free-play

Worn steering column shaft or coupling - Change defective component.
Steering pump is faulty - Check the hydraulic steering pump and change if necessary.
Loose or worn steering linkage parts - Repair or replace steering linkage.

Front wheels wander to left or right

Tire pressure uneven - Inflate the tires correctly.
Improper toe-in - Check and adjust toe-in.
Steering linkage joints are worn or loose - Repair or replace steering linkage.
Front wheel bearings are worn or incorrectly adjusted - Adjust correctly or install new bearings.

Electrical Troubleshooting
Battery does not charge

Corroded or loose cable connections - Tighten or clean electrical wiring connections.
Defective battery terminal clamps - Terminal clamps need to be replaced.
Battery faulty cell - Change the battery.
Belt is defective or loose - Replace belt or adjust belt tension.

Starter cranks slowly

Battery power is low - Recharge the battery.
Battery drains quickly - Service battery or change it.
Faulty battery terminals or disconnected cables - Connect cables correctly or replace terminals.

Starter will not crank

Battery is drained or worn - Battery needs to be recharged or replaced.
Battery cables are disconnected or improperly connected - Inspect cables and connect properly.
Battery capacity is low - Recharge the battery.
Damaged starter motor - Repair or change starter.



Farm Tractors Technical Specifications
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