Specifications, Service, and Repair of Farm and Lawn Tractors

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Kubota M6800 - Problem Solving

Recently I discovered a malfunction with my Kubota M6800 loader. Diesel can not crank over. Tell me please what is the damage?

You used an incorrect type of fuel. High-pressure fuel pump is damaged. Check and repair. Wrong fuel injection pump timing. Need to set up.

M6800 tractor damages. Engine has low power or compression. How do I fix an issue?

Remove and clean Air Filter. Remove and clean Muffler or replace. Restricted air filter. Insufficient fuel flow or quality.

Tell me what is damage if engine stalls?

Water separator clogged - Clean water separator.

M6800 tractor problem. Hard shifting transmission. What's fault?

Wrong transmission lubricant - Drain and fill with recommended lubricant.

Please give me information why my steering wheel spinning without resistance? What should I do to troubleshoot?

The minimum oil level - Pour full. The steering cylinder is heavily worn - Perform repair. Pump steering broke - Install a new pump.

I purchased a Kubota M6800 loader in april. Presently there is problem. Motor won't start. Could somebody help me diagnose a source of trouble?

Starter does not work - Change or refit. Fuel line is clogged up - Clean and flush. Dirty fuel filter element - Replace it. Piston ring failure - Replace the piston rings.

I have the same model. Recently, the steering turns in one direction. Explain to me what's malfunction?

Low Oil Rating. Air in steering hydraulic system. Air-bleed steering system. Bent spindle arm. Breakage of hydraulic hoses. Eliminate a defect. Steering pump is worn out. Repair the pump. Power steering is worn out. Replace it.

M6800 tractor question. Diesel cranks but will not start. Need help to define the reason of damage. What needs to be repaired?

Clogged fuel line or air lock. Dirt or water in fuel system. Cold start system worked incorrectly. Defect or failure of piston rings. High pressure fuel pump drive shaft is broken. Water, dirt, or air in fuel system. Drain, flush, fill and bleed system. Crankcase oil too heavy. Use oil of proper viscosity.

Kubota M6800 diesel motor damages. Diesel is difficult to start permanently. How could i fix this defect?

Clogging in fuel tank vent. Air leakage to the fuel inlet. Exhaust pipe is clogged. Slow starter speed. Diesel injection nozzles faulty or sticking. Filter clogged. Incorrect timing.

Steering not working on my tractor. What's a breakdown?

The air is in hydraulic system. We recommend you release air from system. Minimum hydraulic oil level in the tank. It is required to add oil. Steering hydraulic cylinder worn out Replace the faulty part.

Having used the same model. Why diesel does not start? How do i fix the breakdown?

Valve timing is incorrect - Set a valve timing. Bad cylinder compression. Wear cylinder bores - Need overhaul. Leaks between valves and seats - Remove leaks.

Kubota M6800 damages. I hear the engine knocking. what could be the issue?

Lack of oil. Fill up. Engine out of time. Excessive engine load.

I have a problem why front axle to make a lot of noise constantly while driving?

Defective gear. Replace gears. Bearings are very worn out. Fit new bearings.

I own this tractor more than 3 years. Sometimes motor start is very hard. What a breakdown?

Nozzle has dirt. It is required to inspect injector. High-pressure fuel pump is not working. Do overhaul of injection pump.

I have the exact same tractor. Answer my question what reason if differential lock does not work immediately? How to solve the problem?

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

We have Kubota M6800 loader. Diesel engine not working. Help me what's issue?

Possibly fuel filter element has dirt. Otherwise high-pressure fuel pump not adjusted.

Please help. Engine overheating occurs. What could be the problem?

Low coolant level. Fill radiator to proper level, check radiator, coolant recovery tank, and hoses for loose connection or leaks. Low oil - Replace the oil to correct grade. Oil level is less - Top up to level. Overloaded - Reduce the load. Running out of engine oil - Add engine oil. Excessive load - Reduce load or speed. Broken or misadjusted fan belt - Adjust or replace.

My brother has M6800 tractor. Today he got knocking in the rear axle housing. What is the malfunction?

These signs point to bearing problems.

Can someone say me what happened if diesel engine excessive white smoke at idle?

When white smoke visible from the exhaust pipe you must to carry out replacement of piston rings immediately. Worn cylinder liner and piston rings. Replace them with new ones.

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