________________________________________________________________________________________
| Home / Farm Tractors / Case IH Tractors / Case IH 1594 |
Case IH 1594 Troubleshooting
The
Case IH 1594 utility tractor was manufactured between 1985 and 1988. The tractor
is powered by AD6.55 330 cubic inches six-cylinder liquid-cooled diesel engine
with a maximum output power of 97 hp (72,3 kW) and 329,1 Nm (242,8 lb-ft) of max
torque at 1425 rev/min.
The Case IH 1594 is fitted with 2 types of transmission. Type 1: 12x4 synchromesh gear transmission. Type 2: Hydra-Shift transmission with 12 forward and 4 reverse gears. The maximum travel speed (forward and reverse): 19,7 mph (31,7 kph) / 11,6 mph (18,7 kph).
The open center hydraulic system includes a gear pump with fluid flow rate of 10,5 gpm (39,8 lpm). The main relief pressure is 180 bar (2600 psi). The four-wheel drive models are equipped with 14.9-24 front tyres and 16.9-38 rear tyres. The 10.00-16 front tyres and 13.6-28 rear tyres fit two wheel drive tractors. The wheelbase is 100" (2540 mm).
| Diesel Engine Troubleshooting |
| Engine difficult to start or will not start |
Air in the fuel lines - Bleed the fuel lines.
Fuel filter plugging - Service the filter.
Defective injection nozzle - If necessary, replace with a new nozzle.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve clearance is wrong - Adjust valve clearance.
Fuel injection pump malfunctioning - Rebuild or replace pump.
| Diesel starts but then stops |
Air cleaner is dirty - Install new air filter element.
Dirty fuel filter - Clean the filter element.
Fuel injection pump has loose connections - Tighten the connections.
Fuel injectors are faulty or clogged - Replace or clean fuel injectors.
Fuel injection pump is broken - Replace or repair injection pump.
| Engine shuts off suddenly while running |
Coolant temperature is low - Normalize the temperature by warming up the engine.
Fuel filter plugging - Clean the filter element.
Air in the fuel lines - Bleed the fuel lines.
Defective injection nozzle - Check injection nozzles and replace if required.
Improper setting of fuel injection pump timing - Adjust the pump as required.
| Engine stops while idle |
Low idle speed setting is not correct - Correct the settings.
Faulty fuel injection pump - Rebuild or install a new injection pump.
Dirty or defective injectors - Inspect fuel injectors and change as required.
Improper valve clearance - Check and adjust.
| Engine power is too low |
Clogged air cleaner - Clean air cleaner element.
Faulty or dirty injection nozzles - Service or change injection nozzles.
Uneven fuel injection pressure - Check the fuel injection pressure and adjust if necessary.
Improper valve clearance - Check and adjust as required.
Low idle speed setting is not correct - Correct low idle adjustment.
Dirt in the fuel lines or hoses - Fuel lines and hoses need to be cleaned.
Blown cylinder head gasket - Replace cylinder head gasket.
Piston rings are defective or leaking - Replace the piston rings as required.
| Engine is overheated |
Low engine coolant - Add coolant fluid and inspect the cooling system for leaks.
Engine oil level is insufficient - Fill up the oil to required level.
Clogged radiator fins or damaged radiator cap - Install new cap or clean radiator.
Excessive wear of the fan belt - Belt change is required.
Engine overload - Load reducing is recommended.
| Oil pressure is insufficient |
Oil level is insufficient - Checking oil level and add if necessary.
Oil filter clogging - Change or clean engine oil filter element.
Oil grade or viscosity is wrong - Use correct viscosity oil.
Main bearing oil clearance is excessive - Change bearings.
Defective oil pump - Check and replace if necessary.
| Engine noise or knocking |
Engine oil level is insufficient - Add oil to the engine crankcase.
Coolant temperature is low - Normalize the temperature by warming up the engine.
Improper fuel injection timing - Use the correct fuel injection pump timing adjustment.
Incorrectly adjusted low idle speed - Test and adjust.
Fuel injectors are dirty or defective - Inspect fuel injectors and change as required.
Connecting rod misalignment or failure - Need to replace or align the connecting rod.
Pistons are broken or worn - Have pistons replaced.
| Transmission Troubleshooting |
| Transmission oil pressure is insufficient |
Insufficient transmission oil - Check transmission oil level and add oil as required.
Plugged transmission oil filter (if equipped) - Service or change transmission oil filter.
Relief valve is stuck - Install a new relief valve.
| Excessive transmission noise |
Low oil level - Check transmission oil level and add oil as required.
Transmission oil contamination - Fill up with fresh transmission oil.
Defective gears or improper backlash - Install new gears and set backlash correctly.
Worn or broken bearings - Change the bearings.
Worn or damaged gear shift forks - Change defective shift forks.
Worn or damaged shaft splines - Replace defective shaft.
| Hard to shift gears |
Worn or rusty gear shift linkage - Install new shift linkage.
Worn or bent gear shift forks - Change the shift forks.
Worn parts of the gear shifting mechanism - Change worn parts.
Clutch is out of adjustment or defective - Adjust correctly or replace.
| External oil leaks |
Transmission oil level is high - Correct the oil volume.
Damaged seals or gaskets - Install new components.
| Hydraulic System Troubleshooting |
| Insufficient hydraulic oil pressure |
Low hydraulic oil level - Check and refill the hydraulic oil.
Clogged hydraulic oil filter - Change the hydraulic filter element or service if required.
Hydraulic pump is faulty - Install a new hydraulic fluid pump.
Incorrect adjusted hydraulic spool valve - Adjust the spool valve correctly.
Hydraulic cylinder failure - Install a new hydraulic cylinder or repair it.
Leaking hydraulic pipes - Inspect hydraulic system for leaks and repair it.
| Hydraulics overheating |
Main relief valve is defective - Install a new relief valve.
Hydraulic fluid type is wrong - Use correct type of hydraulic fluid.
Dirty hydraulic fluid - The fluid must be changed.
Air in hydraulic lines - Bleed hydraulic lines.
| 3-point hitch fails to lift or lifts slowly |
Hitch is under excessive load - The load should be reduced.
Hydraulic oil is insufficient - Need to add oil.
Clogged hydraulic oil filter element - Hydraulic filter maintenance required.
Hydraulic pump is faulty - Change or repair hydraulic oil pump.
Main relief valve is faulty - Relief valve must be changed.
Hydraulic spool valve block is defective - Repair or change hydraulic valve.
Defective hydraulic cylinder - Repair or replace hydraulic cylinder.
Suction line is disconnected or broken - Replace or connect correctly.
| Hitch fails to drop or drops slowly |
Hydraulic control valve is set improperly - The control valve must be set correctly.
Hydraulic cylinder is defective - Repair or change hydraulic cylinder.
Three-point hitch has not been adjusted - The 3-point hitch must be adjusted.
Lift arm shaft is worn - Install a new shaft.
| Hitch lift or drop is jerky |
Air in hydraulic lines - Bleed hydraulic lines.
Dirty hydraulic fluid - The fluid must be changed.
Hydraulic pump malfunction - Replace or repair hydraulic oil pump.
Defective hydraulic spool valve block - Repair or change hydraulic valve.
Defective hydraulic cylinder - Repair or change hydraulic cylinder.
| Steering Troubleshooting |
| Steering is difficult |
Improperly installed or damaged steering column - Install the steering column as required or replace it.
Air lock in hydraulic steering system - Bleed air from system.
Not adjusted toe-in - Adjust toe-in properly.
Tires have uneven wear - Replace the tires.
Faulty steering pump - Steering pump needs to be repaired or replaced.
Stuck or damaged steering pump control valve - Change or flush control valve.
Steering oil level is insufficient - Checking steering oil level and add it if necessary.
| Excessive play in steering |
Worn steering column coupling or shaft - Change defective part.
Steering pump stopped working - Steering pump needs to be repaired or replaced.
Loose or worn steering linkage parts - Replace or repair steering linkage.
| Tractor is pulling to right or left |
Front tyres wear unevenly - Change the tyres.
Improper toe-in - Adjust toe-in wheels.
Steering linkage components are loose or worn - Repair or replace steering linkage.
Damaged or improperly adjusted or worn front wheel bearings - Change or adjust bearings correctly.
| Electrical System Troubleshooting |
| Battery is not charging |
Wiring connections are corroded or loose - Service or tighten connections.
Defective battery terminal clamps - Terminal clamps should be changed.
Faulty cell in battery - Replace the battery.
Defective or loose belt - Install a new belt or adjust belt tension.
| Starter turns slow |
Low battery voltage - Charge the battery.
Battery drains quickly - Service charging system or install new battery.
Wires are disconnected or battery terminals are corroded - Check battery wires and service or replace terminals.
| Starter motor won't turn |
Battery is discharged or worn - Recharge or replace battery.
Battery cables are disconnected or incorrectly connected - Check cables and connect as needed.
Low battery output voltage - Battery is drained, recharge it.
Defective starter motor - Repair or change starter.
________________________________________________________________________________________
________________________________________________________________________________________
| Farm Tractors Technical Specifications |