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Case IH 1494 Troubleshooting

The Case International 1494 is a 2WD or 4WD utility tractor. This model was manufactured from 1983 to 1988. The Case IH 1494 is powered by Case AD4.55T four cycle 4-cylinder turbocharged diesel engine with a maximum output power of 85 hp (63.5 kW) and 296 Nm (218 lb-ft) of peak torque at 1600 rev/min.

The Case IH 1494 tractor was fitted with 2 transmission options: 12x4 Hydra-shift transmission, or synchromesh gear transmission with 12 forward and 4 reverse gears. The maximum forward speed - 17.1 mph (27.4 km/h), maximum reverse speed - 7.5 mph (12 km/h).

The open center hydraulic system used a gear pump with flow rate of 15.3 gal/min (58 l/min). The hydraulic system pressure is 170 bar (2450 psi). The 2-wheel drive models are equipped with 7.50x18 front tyres and 16.9x34 rear tyres. The 12.4x24 front tyres and 13.6x38 rear tyres fit 4-wheel drive tractors. The wheelbase is 88.5 inches (2240 mm).

Engine Troubleshooting
Diesel engine hard to start or doesn't start

Air in fuel system - Bleed fuel system.
Fuel filter plugged - Clean or change the filter.
Defective or clogged injection nozzle - Clean or change injection nozzles.
Water or dirt in fuel system - Drain, flush, and service the system.
Valve clearance is not correct - Have it adjusted.
Fuel injection pump malfunction - Repair or install a new fuel pump.

Diesel starts but stalls immediately

Clogged air filter - Clean air cleaner element.
Fuel filter element is dirty - Service the filter.
Fuel injection pump is leaking - Repair any leaks.
Fuel injectors are faulty or clogged - Inspect fuel injectors and change as required.
Fuel injection pump failure - Rebuild or change fuel pump.

Engine stops running suddenly

Engine is not preheated - Warm up the engine.
Fuel filter plugging - Replace filter element.
There is air in the fuel system - Bleed the system.
Defective or clogged injection nozzle - Inspect nozzles and replace if necessary.
Improper fuel injection timing - Set up as recommended.

Engine stops when idle

Low idle speed setting is incorrect - Normalize low idle speed.
Fuel injection pump is not operating properly - Rebuild or replace pump.
Fuel injectors are faulty or clogged - Test and replace fuel injectors if necessary.
Improper valve clearance - Adjust to proper valve clearance.

Engine lacks power

Restricted intake air - Clean or change.
Fuel injection nozzles are clogged or faulty - Install a new kit of correctly balanced nozzles.
Incorrect fuel injection pressure - Repair or replace injection pump.
The valve clearance is incorrect - Have it adjusted.
Low idle speed adjustment is incorrect - Adjust the low idle speed.
Dirt in the fuel hoses or lines - Service fuel hoses and lines.
Worn cylinder head gasket - Change cylinder head gasket.
Damaged or leaking piston rings - Piston rings need to be replaced.

Engine is overheated

Insufficient coolant fluid - Add coolant fluid to cooling system and also check it for leaks.
Low engine oil level - Fill the crankcase with engine oil.
Dirty radiator fins or faulty radiator cap - Replace cap or clean radiator.
Broken or loose fan belt - Fan belt must be replaced.
Engine is under excessive load - Reduce load on the engine.

Oil pressure is insufficient

Low crankcase oil level - Need to add oil.
Oil filter element clogged - Replace or service engine oil filter.
Improper type of engine oil - Use oil of proper viscosity.
Main bearing oil clearance is excessive - Bearing needs to be changed.
Oil pump failure - Repair or replace.

Engine noise or knocking

Engine oil level is insufficient - Checking oil level and add if necessary.
Engine is not preheated - Engine is not warmed up to the required temperature.
Fuel injection pump timing is wrong - Check the fuel injection pump timing adjustment.
Wrong adjustment of low idle speed - Need to adjust idle speed.
Fuel injectors are faulty or clogged - Clean fuel injectors or change it.
Connecting rod failure or misalignment - Align or change connecting rod.
Pistons are worn or broken - Pistons replacement required.

Transmission Troubleshooting
Low transmission oil pressure

Transmission fluid insufficient - Fill the transmission housing to proper fluid level.
Transmission fluid filter element clogging (if equipped) - Clean or change transmission fluid filter.
Relief valve is damaged - Change relief valve.

Transmission makes noise

Transmission oil insufficient - Fill the transmission housing with oil.
Transmission fluid is contaminated - Transmission fluid change required.
Improper backlash or worn gears - Install new gears and adjust backlash properly.
Bearings are cracked or worn - Change faulty bearings.
Worn or bent gear shift forks - Shift forks need to be changed.
Shaft splines are stuck or worn out - Shaft need to be replaced.

Gear hard to shift

Gear shift linkage is worn or rusty - Lubricate or replace shift linkage.
Shift forks are bent or worn out - Install new shift forks.
Defective parts in the gearshift mechanism - Replace defective parts.
Unadjusted or worn clutch - Clutch needs to be adjusted or changed.

Transmission fluid leaking

Transmission fluid level is exceeded - Excess fluid must be drained.
Seals or gaskets are worn - Install new seal or gaskets.

Hydraulic System Troubleshooting
Low hydraulic system pressure

Hydraulic oil level low - Check and refill the hydraulic oil.
Clogged hydraulic fluid filter - Replace hydraulic filter element or service if necessary.
Hydraulic pump is defective - Change or repair hydraulic fluid pump.
Not adjusted hydraulic control valve - Need to adjust.
Damaged hydraulic cylinder - Change or repair hydraulic cylinder.
Leaks in hydraulic pipes - Find leaks in the system and fix it.

Hydraulics overheating

Damaged main relief valve - Install a new relief valve.
Hydraulic fluid type is incorrect - Pour the correct type of fluid.
Hydraulic fluid is contaminated - Fill up with new hydraulic fluid.
Air in hydraulic lines - Bleed hydraulic lines.

Three-point hitch cannot be lifted or lifting is too slow

Excessive loading on the hitch - Reduce hitch load.
Hydraulic oil level low - Check and refill the hydraulic oil.
Clogged hydraulic fluid filter element - Clean or replace the hydraulic filter.
Defective hydraulic pump - Install a new hydraulic oil pump.
Main relief valve failure - Relief valve replacement required.
Hydraulic spool valve is defective - Repair or replace hydraulic valve.
Broken hydraulic cylinder - Replace or repair hydraulic cylinder.
Suction line is loose or broken - Replace or repair.

Three-point hitch cannot be dropped or dropping is too slow

Not adjusted hydraulic spool valve - Need to adjust spool valve.
Hydraulic cylinder is faulty - Repair or install a new hydraulic cylinder.
Three-point hitch has not been adjusted - Adjust the hitch.
Hitch cross shaft is worn - Install a new shaft.

Jerky lifting or lowering of three-point hitch

Air in the hydraulic system - Air bleeding.
Contaminated hydraulic oil - Change hydraulic oil.
Damaged hydraulic pump - Install a new hydraulic oil pump.
Defective hydraulic control valve block - Change or repair hydraulic valve.
Hydraulic cylinder is faulty - Repair or change hydraulic cylinder.

Steering System Troubleshooting
Difficult steering

Defective or incorrectly mounted steering column - Change steering column or mount correctly.
Air lock in hydraulic steering system - Bleed air from system.
Improper toe-in - Adjust toe-in wheels.
Uneven wear on front tires - Replace the tires.
Steering pump is worn - Install a new hydraulic steering pump.
Faulty or stuck pump flow control valve - Service or replace flow control valve.
Steering oil level low - Add oil to steering system.

Excessive play in steering

Steering column coupling or shaft is extremely worn out - Change defective part.
Steering pump failure - Repair or replace steering pump.
Worn or loose steering linkage assembly - Repair or change steering linkage.

Tractor pulls to right or left

Front tires are worn unevenly - Install new tires.
Improper toe-in - Check and adjust toe-in.
Loose or worn steering linkage components - Change or repair steering linkage.
Front wheel bearings are damaged or incorrectly adjusted - Replace or adjust the bearings correctly.

Electrical System Troubleshooting
Battery does not charge

Electrical cable connections are loose or corroded - Tighten or clean electrical wiring connections.
Electrical terminal connectors are faulty - Change terminal connectors.
Defective battery - Replace the battery.
Defective or loose belt - Belt needs to be adjusted or changed.

Starter turns slow

Battery capacity is low - Battery needs to be recharged.
Battery is not holding charge - Service charging system or install new battery.
Corroded battery terminals or disconnected wires - Check wiring connections and replace or clean terminals.

Starter is not cranking

Battery is low or faulty - Replace or charge as required.
Battery wires are disconnected or incorrectly connected - Check wires and connect correctly.
Low battery capacity - Battery is drained, recharge it.
Starter motor is defective - Starter needs to be changed.



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