Specifications, Service and Repair of Farm and Lawn Tractors

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MF 6490 - Troubleshooting methods

The day before I recognized some issue on my MF 6490. Diesel motor does not crank. Tell me please what kind of breakdown?

Fuel grade is incorrect. Malfunction of the fuel pump. Inspect and replace. Wrong fuel pump timing. Need to set up.

Massey Ferguson 6490 damages. Engine loses power. How can I correct the situation?

Clean Air Screen. Clean Engine Cooling Fins. Engine air cleaner is clogged. Perform the service of the air cleaner.

Help with the question what is fault if diesel engine starts but stops after a short period of time?

Water mixed in the fuel - Remove water and replace with light oil.

6490 tractor issue. Transmission shifts hard. What's fault?

Defective or worn clutch - Change worn parts.

Please tell me why steering wheel rotates without resistance? What do I need to do to solve the problem?

Low Oil Rating - Top up the oil. This is a steering cylinder malfunction - Make a replacement. The steering pump is defective - Install a new pump.

I purchased a MF 6490 in september. Today there is malfunction. Engine won't start. Could someone help me diagnose a source of malfunction?

Starter motor turns engine too slowly - Need a replacement or overhaul. Restriction in a fuel pipe - Flush and clean the fuel pipe. Filter element is dirty - Renstall filter element. Piston rings worn out - Must be repaired.

I have the same model. Yesterday I saw steering wheel stopped turning. Somebody tell me what's malfunction?

Minimum Oil Rating. Tires not properly inflated. Loose steering or ball joints - Retighten or replace defective parts. Breakage of hydraulic hoses. It is necessary to eliminate a defect. Steering pump is defective. Check the steering pump. Power steering defect. Replace it.

6490 tractor failure. Motor cranks but will not start. Help me please specify main cause of trouble. What needs to be repaired?

Improper engine oil viscosity. Loose electrical connections. Incorrect functions of the cold start system. Wear or deformation of piston rings. Broken Fuel Pump Drive Shaft. Water in fuel. Fuel too heavy at low temperature.

Massey Ferguson 6490 diesel malfunctions. Diesel is difficult to start regularly. How could i fix malfunction?

Restricted Fuel Lines. Air Leaks in Suction Lines. Restriction in exhaust pipe. Low voltage - Charge battery. Dirty or faulty injectors. Filter clogged. Incorrect timing.

Steering not working on my tractor. What is problem?

The air was formed in hydraulic system. You must draw out air. Oil small indicator in system. It is required to add oil. Steering cylinder has problems Check and repair.

I have the exact same model. Why engine failure to start? How could i fix a failure?

Incorrect valve timing - Adjust valve timing. Low compression. Worn cylinder bores - Repair it. Leaks between seats and valves - Remove leaks.

6490 tractor malfunctions. I hear a diesel knock. what is the probable issue?

Lack of oil. Fill up. Coolant temperature dropped.

I have a problem why driving front axle to howls regularly when tractor run?

Teeth of gears collapsed. You need to install new gears. Bearings have damage. Replace it.

I own this tractor three years. Regularly engine start is difficult. How to eliminate?

Injection nozzle is clogged. It is required checking injector. The fuel pump is damaged. Do overhaul of injection pump.

I have the exact same tractor. Explain to me why differential lock broke down swiftly? What's solution to the problem?

Diaphragm damaged or discs friction clutch worn out. You have to make repairs.

I'm using Massey Ferguson 6490. Engine will not start. I need to know How can I eliminate a breakdown?

We can assume fuel filter clogged. Otherwise injection pump to lost adjustments.

Please help me. Motor overheats regularly. What is the fault?

Little coolant in the cooling system. You need to fill the system. Loosened or damaged fan belt - Adjust the tension of belt or replace the belt with new one. Piston ring blow past. Replace with new rings. Excessive load - Reduce load or speed. Loose or defective fan belt - Replace fan belt as required. Check belt tensioner.

My dad uses MF 6490. Yesterday he got a crash in the rear axle housing. What is the malfunction?

All sounds evidence of damaged bearings.

Tell me why engine exhaust white gas?

When white smoke visible from the exhaust pipe you must to change piston rings immediately. High engine oil level - Inspect oil level and correct.

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