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| Home / Farm Tractors / Case IH Tractors / Case IH 7140 Magnum |
Case IH 7140 Magnum Troubleshooting
The
Case IH Magnum 7140 row-crop tractor was manufactured between 1987 and 1993. The
tractor is powered by 505 cu.in (8.3 L) Case-International 6TA-830 6-cylinder
turbocharged diesel engine with a rated power of 238 hp (176.2 kW).
The Case IH Magnum 7140 is fitted with a 2 types of transmission. Type 1: Full powershift transmission with 18 forward and 2 reverse gears. Type 2: Creeper transmission with 24 forward and 3 reverse gears. The maximum travel speed (forward/reverse): 19.6 mph (31.5 kph) and 3 mph (4.8 kph). The closed center hydraulic system has a piston pump with a rated capacity of 22 gpm (83.3 lpm).
The hydraulic system pressure is 180 bar (2600 psi). The Case IH 7140 Magnum tractor is equipped with a hydrostatic power steering, differential hydraulic wet disc brakes, 14L-16.1 (2WD) or 14.9R28 (4WD) front tyres, and 18.4R42 rear tyres. The wheelbase is 118.3 in (3000 mm).
| Engine Troubleshooting |
| Engine starts hard or will not start |
Air trapped in fuel system - Bleed air.
Dirty fuel filter - Filter maintenance required.
Fuel injection nozzles are faulty or clogged - Check and replace nozzles if required.
Dirt or water in fuel system - Drain water or flush dirt from the system.
Valve out of adjustment - Adjustment procedure required.
Fuel injection pump is damaged - Replacement or repair required.
| Engine starts but then stalls |
Dirty air cleaner - Replace air filter element.
Dirty fuel filter - Filter maintenance required.
Fuel injection pump is leaking - Repair any leaks.
Damaged or clogged injectors - Replace fuel injectors.
Fuel injection pump malfunction - Repair or change injection pump.
| Engine shuts off while running |
Engine has not warmed up to the recommended temperature - Warm up engine as required.
Fuel filter plugging - Clean the filter element.
Air in the fuel lines - Bleed the fuel lines.
Dirty or damaged injection nozzles - Install a new kit of correctly balanced nozzles.
Improper fuel injection timing - Adjust fuel injection pump as required.
| Engine stops when idle |
Too low idle RPM - Adjust low idling as recommended.
Fuel injection pump is not operating properly - Rebuild or install a new injection pump.
Fuel injectors are faulty or clogged - Clean fuel injectors or change it.
Valve clearance is out of adjustment - Correct valve clearance.
| Poor engine power |
Dirty air filter - Replace air filter element.
Defective injection nozzle - Check and replace nozzles if required.
Improper fuel injection pressure - Adjust to proper pressure.
The valve clearance is incorrect - Need to adjust valve clearance.
Wrong adjustment of low idle speed - Adjustment required.
Fuel lines or hoses are clogged - Clean fuel system hoses and lines.
Cylinder head gasket is worn - Replace the gasket as required.
Piston rings are worn or damaged - Replace the piston rings as required.
| Engine overheating |
Coolant level is low - Top up coolant fluid and check system for leaks.
Lack of engine oil - Fill up the engine oil.
Clogged radiator core or damaged radiator cap - Change cap or clean radiator.
Fan belt is loose or defective - Belt replacement is recommended.
Engine is overloaded - Reduce the load or use a lower gear.
| Low oil pressure |
Engine oil insufficient - Checking oil level and add if necessary.
Oil filter element clogged - Clean or change engine oil filter.
Wrong oil viscosity - Use the specified type of engine oil.
Main bearing oil clearance is excessive - Replace bearings.
Oil pump malfunction - Replace as required.
| Abnormal engine noise or knocking |
Engine oil level is low - Fill up the oil to required level.
Engine not warmed up - Warm up to required temperature.
Improper setting of fuel injection pump timing - Adjust according to specifications.
Improperly adjusted low idle speed - Adjust low idling as recommended.
Dirty or defective injectors - Replace fuel injectors.
Connecting rod is worn or not aligned - Connecting rod needs to be replaced or aligned.
Pistons are scored or worn - Install new pistons.
| Transmission Troubleshooting |
| Insufficient transmission oil pressure |
Insufficient transmission fluid - Need to add transmission fluid.
Transmission oil filter element clogging (if equipped) - Clean or change transmission oil filter.
Relief valve failure - Change relief valve.
| Excessive transmission noise |
Insufficient transmission fluid - Add fluid to the transmission housing.
Transmission fluid is contaminated - Change the fluid.
Backlash is incorrect or gears are damaged - Install new gears and set backlash correctly.
Bearings are damaged or worn - Bearings replacement required.
Worn or bent shift forks - Change defective shift forks.
Shaft splines are worn or stuck - Change the shaft.
| Gears are hard to shift |
Stuck or worn gear shift linkage - Lubricate or replace shift linkage.
Shift forks are worn or bent - Change the shift forks.
Gearshift mechanism is damaged - Replace or repair the mechanism.
Clutch is out of adjustment or defective - Adjust correctly or replace.
| External oil leaks |
Transmission oil level is exceeded - Correct the oil volume.
Seals or gaskets are worn - Replace worn seal or gaskets.
| Hydraulics Troubleshooting |
| Low hydraulic oil pressure |
Insufficient hydraulic oil - Checking hydraulic oil level and add if necessary.
Clogged hydraulic oil filter - Service the hydraulic filter or change if required.
Defective hydraulic pump - Replace or repair hydraulic fluid pump.
Not adjusted hydraulic control valve - Need to adjust.
Hydraulic cylinder not working - Repair or change hydraulic cylinder.
Hydraulic piping is leaking - Check the hydraulic system and fix leaks.
| Hydraulic system is overheated |
Main relief valve malfunction - Replace relief valve.
Incorrect type of hydraulic oil - The correct type of oil must be used.
Hydraulic oil is contaminated - Fill up with fresh hydraulic oil.
Air in the hydraulic system - Air bleeding.
| Hitch not lifting or hitch lifts slowly |
Excessive hitch loading - Reduce loading.
Hydraulic fluid level low - Checking hydraulic fluid level and add if necessary.
Clogged hydraulic oil filter - Replace filter element or clean if required.
Hydraulic pump is defective - Install a new hydraulic fluid pump.
Main relief valve failure - Relief valve must be changed.
Hydraulic control valve block is defective - Replace or repair the valve.
Hydraulic cylinder is faulty - Replace or repair hydraulic cylinder.
Loose or broken suction line - Tighten the pipe or replace it.
| 3-point hitch can't drop or drops too slowly |
Incorrect setting hydraulic control valve - Use the correct adjustment.
Defective hydraulic cylinder - Repair or replace hydraulic cylinder.
Three-point hitch is out of adjustment - The 3-point hitch must be adjusted.
Worn hitch rock shaft - Install a new shaft.
| Jerky lowering or lifting of the hitch |
Air in the hydraulic system - Air bleeding.
Contaminated hydraulic oil - Change hydraulic oil.
Defective hydraulic pump - Change or repair hydraulic oil pump.
Hydraulic spool valve is damaged - Install a new hydraulic valve or repair it.
Hydraulic cylinder is broken - Repair or replace hydraulic cylinder.
| Steering Troubleshooting |
| Excessive effort to steer |
Worn or incorrectly fitted steering column - Replace the steering column or refit it correctly.
Air lock in the steering system - Air-bleed steering system.
Improper toe-in - Adjust toe-in wheels.
Tyre pressure is uneven - Adjust the tyre pressure.
Steering pump not working - Install a new steering pump.
Steering pump control valve is faulty or stuck - Clean or install new control valve.
Insufficient steering fluid - Fill up the steering fluid.
| Excessive steering wheel free play |
Worn steering column coupling or shaft - Replace faulty part.
Steering pump stopped working - Install a new hydraulic steering pump.
Steering linkage parts are loose or worn - Inspect and replace as required.
| Tractor is pulling to right or left |
Tire pressure is uneven - Adjust the tire pressure.
Incorrect toe-in - Adjust toe-in wheels.
Loose or worn steering linkage parts - Inspect and replace as required.
Improperly adjusted or defective front hub bearings - Adjust properly or replace bearings.
| Electrical System Troubleshooting |
| Battery will not charge |
Loose or corroded electrical wiring connections - Tighten or clean electrical wiring connections.
Battery terminal connectors are defective - Change terminal connectors.
Battery is defective - Replace the battery.
Loose or defective belt - Need to adjust belt tension or replace belt.
| Starter turning slow |
Battery voltage is low - Recharge the battery.
Battery won’t hold charge - Service charging system or replace battery.
Disconnected cables or faulty battery terminals - Check wire connections and change or service terminals.
| Starter motor won't turn |
Battery is discharged or defective - Recharge or change battery.
Wiring harness is disconnected or improperly connected - Check wiring harness and connect as required.
Low battery output voltage - Low battery charging, charge as required.
Starter motor failing - Repair or change starter.
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| Farm Tractors Technical Specifications |