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Case IH 3394 Troubleshooting

The Case IH 3394 four-wheel drive row-crop tractor was manufactured from 1985 to 1987. The components of Case IH 3394 powerline system: a 504 cubic inches (8.3 L) Case 504BD 6-cylinder turbocharged liquid-cooled diesel engine with a rated power of 180 hp (135 kW), and power shift transmission with 24 forward and 3 reverse gears or partial power shift transmission with 12 forward and 3 reverse gears.

The maximum travel speed (forward/reverse): 20.8 mph (33.5 km/h) and 7.3 mph (11.7 km/h). The closed center hydraulic system includes a piston pump with rated fluid flow of 30 gal/min (113.6 l/min). The lift capacity is 7750 lbs (3515 kg) at 24" (610 mm) behind pin. The Case IH 3394 is equipped with a hydrostatic power steering, differential hydraulic wet disc brakes, 16.9x26 front tyres, and 24.5R32 rear tyres. The wheelbase is 116 inches (2940 mm).

Diesel Engine Troubleshooting
Engine starts hard or won't start

Air in the fuel lines - Bleed the fuel lines.
Fuel filter plugged - Clean or change the filter.
Clogged or defective injection nozzles - Check injection nozzles and replace if required.
Water in the fuel system - Change fuel and repair fuel system.
The valve clearance is not adjusted - Check and adjust.
Fuel injection pump malfunctioning - Rebuild or install a new injection pump.

Diesel starts but immediately stops

Dirty air filter element - Replace air filter element.
Dirty fuel filter - Service or replace the filter.
Problems with fuel injection pump tightness - Inspect fuel injection pump for leaks.
Damaged or clogged injectors - Test and replace fuel injectors if necessary.
Fuel injection pump is faulty - Replace or repair injection pump.

Engine stalls while running

Low coolant temperature - Warm up engine as required.
Fuel filter element clogging - Replace filter element.
Air in fuel system - Bleed fuel system.
Clogged injection nozzle - Clean or replace injection nozzles.
Improper fuel injection timing - Set up as recommended.

Engine shuts off while idling

Incorrect low idle setting - Adjustment required.
Fuel injection pump is damaged - Repair or replace injection pump.
Dirty or defective injectors - Replace or clean fuel injectors.
Valve clearance is not correct - Check and adjust.

Diesel engine is losing power

Dirty air cleaner - Replace air filter element.
Dirty or faulty injection nozzles - Clean or change injection nozzles.
Fuel injection pressure is incorrect - Check the fuel injection pressure and adjust if necessary.
Valve out of adjustment - Adjust valve clearance according to specifications.
Too low idle RPM - Correct low idle adjustment.
Dirty fuel lines or hoses - Fuel hoses and lines must be clean.
Blown cylinder head gasket - Change cylinder head gasket.
Worn or damaged piston rings - Replace the piston rings as required.

Engine overheating

Lack of engine coolant - Add coolant and check the components of cooling system.
Insufficient engine oil - Fill the crankcase with engine oil.
Faulty radiator cap or dirty radiator fins - Clean radiator or install new cap.
Excessive wear of the fan belt - Change the fan belt.
Diesel engine overloaded - Shift to lower gear or reduce the load.

Oil pressure is insufficient

Insufficient engine oil - Fill crankcase to proper oil level.
Clogged oil filter element - Clean or replace engine oil filter element.
Oil grade or viscosity is incorrect - Use oil of correct viscosity.
Incorrect oil clearance in crankshaft bearing - Bearings need to be reinstalled.
Oil pump is damaged - Replace as required.

Engine noises or knocks

Lack of engine oil - Fill the crankcase with engine oil.
Engine not warmed up - Normalize the temperature by warming up the engine.
Improper setting of fuel injection pump timing - Set the fuel pump timing correctly.
Too low idle RPM - Adjust low idle speed.
Fuel injector fault - Clean fuel injectors or change it.
Connecting rod is not aligned or defective - Align or replace connecting rod.
Worn or scored pistons - Replace the pistons.

Transmission Troubleshooting
Low transmission pressure

Low fluid level - Add fluid to the transmission housing.
Dirty transmission fluid filter (if fitted) - Replace or service transmission fluid filter.
Relief valve is stuck - Install a new relief valve.

Excessive transmission noise

Insufficient transmission fluid - Fill the transmission housing to proper fluid level.
Transmission oil is contaminated - Change the oil.
Worn gears or incorrect backlash - Replace defective gears or set backlash properly.
Bearings are damaged or worn - Bearings need to be changed.
Shift forks are bent or worn out - Replace the shift forks.
Shaft splines are damaged or worn - Install a new shaft.

Difficulty shifting gears

Stuck or worn gear shift linkage - Shift linkage need to be replaced.
Damaged or worn gear shift forks - Shift forks need to be replaced.
Gearshift mechanism malfunction - Identify and replace failed parts.
Clutch is faulty or misadjusted - Adjust clutch or replace if required.

Transmission fluid leakage

Too much oil in transmission - Drain the excess oil.
Broken seals or gaskets - Install new components.

Hydraulic System Troubleshooting
Insufficient hydraulic fluid pressure

Low hydraulic fluid level - Fill up the hydraulic fluid.
Clogged hydraulic fluid filter element - Hydraulic filter maintenance required.
Damaged hydraulic pump - Change or repair hydraulic fluid pump.
Incorrect setting hydraulic control valve - Use the correct adjustment.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.
Leaking hydraulic lines - Check the system and repair leaks.

Hydraulic system is overheated

Damaged main relief valve - Relief valve must be changed.
Improper hydraulic fluid type - Use the proper type of hydraulic fluid.
Contaminated hydraulic oil - Change hydraulic oil.
Air in the hydraulic system - Air bleeding.

Hitch not raising or hitch raises slowly

Excessive hitch loading - Reduce the load is required.
Hydraulic fluid is insufficient - Checking hydraulic fluid level and add if necessary.
Hydraulic oil filter is clogged - Service or replace the hydraulic filter.
Defective hydraulic pump - Repair or replace hydraulic fluid pump.
Faulty main relief valve - Relief valve need to be replaced.
Hydraulic control valve block is defective - Replace or repair the valve.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.
Suction line is broken or disconnected - Connect or replace.

Hitch not lowering or hitch lowers slowly

Not adjusted hydraulic control valve - Need to adjust.
Faulty hydraulic cylinder - Repair or install a new hydraulic cylinder.
Three-point hitch is out of adjustment - Adjust as required.
Hitch cross shaft is damaged - Replace the shaft.

Hitch drop or lift is jerky

There is air in the hydraulic system - Bleed hydraulic system.
Hydraulic fluid contamination - Change hydraulic fluid.
Hydraulic pump is defective - Change or repair hydraulic fluid pump.
Hydraulic spool valve block is defective - Repair or replace hydraulic valve.
Hydraulic cylinder is defective - Repair or install a new hydraulic cylinder.

Steering System Troubleshooting
Excessive effort to steer

Worn or incorrectly fitted steering column - Replace the steering column or refit it correctly.
Air in steering system - Bleed the system of air.
Improper toe-in - Adjust toe-in properly.
Uneven tyre pressure - Inflate the tyres properly.
Steering pump not working - Steering pump needs to be repaired or replaced.
Pump flow control valve is worn or stuck - Change or flush control valve.
Steering fluid level is low - Check fluid level and add steering fluid as required.

Excessive free play of steering wheel

Steering column coupling or shaft is worn - Replace defective part.
Faulty steering pump - Install a new hydraulic steering pump.
Worn or loose steering linkage joints - Check and replace as required.

Front wheels wander to left or right

Front tires are worn unevenly - Install new tires.
Incorrect toe-in - Adjust toe-in properly.
Worn or loose steering linkage joints - Repair or change steering linkage.
Incorrectly adjusted or worn front wheel bearings - Replace the bearings or adjust it properly.

Electrical Troubleshooting
Battery won’t charge

Wiring connections are loose or corroded - Tighten or service cable connections.
Battery terminal connectors are defective - Terminal connectors need to be changed.
Battery dead cell - Battery change required.
Damaged or loose belt - Change belt or adjust belt tension.

Starter motor turns slow

Battery capacity is low - Battery needs to be recharged.
Battery drains quickly - Service charging system or replace battery.
Disconnected wiring or bad battery terminals - Check cables and clean or change terminals.

Starter motor is not working

Battery is discharged or worn - Change or recharge battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery voltage - Battery needs to be recharged.
Damaged starter motor - Repair or replace starter.



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MF 250 MF 690 MF 3060 MF 6180
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