Specifications, Service, and Repair of Farm and Lawn Tractors

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Kubota L3800 - Problem Solving

Some days ago I got trouble on my Kubota L3800 Backhoe. Diesel engine doesn't turn over. Explain me what could be the failure?

Fuel grade is wrong. Drive high pressure fuel pump is broken. Inspect and refit. Wrong fuel pump timing. Need to set up.

L3800HST issues. Engine lacks power. How do I solve the problem?

Fuel shortage - Fill the tank and check fuel quality. Injector pump plunger and barrel worn. Replace with a new one.

Tell me please what happened if engine stalling?

Seized engine due to lack of oil, the wrong oil or lack of coolant.

L3800 tractor question. Transmission rough shifting. What happened?

Excessive clutch pedal free travel - Adjust free travel.

I would like to know why my steering wheel spinning without opposition? What are my actions to get rid of problem?

Low Oil Rating - Fill the tank. Steering cylinder has problems - Repair it. The steering pump is defective - Replace pump.

I purchased a Kubota L3800 HST in november. Currently there is damage. Diesel engine won't start. Could somebody help me determine a source of breakdown?

Starter speed is slow - Change or refit. Fuel line is clogged up - You should make washing and cleaning. There is dirt in the fuel filter - Change the filter. Worn piston rings - Need replacement of piston rings.

I bought the same tractor. Recently I noticed steering wheel operate bad. Explain to me what's malfunction?

Minimum Oil Rating. Power steering oil too thick – high viscosity. Replace with the specified oil. hydraulic connection leaking. Eliminate the problem. Steering pump is worn out. Check the steering pump. Wear of power steering. Replace it.

L3800 tractor issue. Motor hard to start. Need help to diagnose the reason of failure. What should I do?

Broken choke or throttle cable. Choke adjusted incorrectly. Cold start system used incorrectly. Defect or failure of piston rings. Defective fuel pump drive shaft. Water mixed in the fuel. Fuel too heavy at low temperature.

L3800HST diesel troubles. Motor hard starting sometimes. How do i solve a problem?

Restriction in fuel tank vent. Air leakage to the fuel inlet. Exhaust pipe is clogged. Slow starter speed. Dirty or faulty injectors. Filter clogged. Long Idle periods.

Steering stopped working on our tractor. What is problem?

The air was formed in hydraulic system. You need release air from system. Oil small indicator in system. Pour completely. Steering hydraulic cylinder is damaged Check and repair.

I use the same model. Why diesel engine has not been started? How can i resolve an issue?

Valve timing is wrong - Set a valve timing. Low compression. Worn cylinder bores - Repair it. Leakage between seats and valves - Remove leakage.

Having issue with a Kubota L3800 Backhoe. The engine knocks. what kind of problem?

Oil of small quantity. Add oil. This is the low temperature of the coolant.

I can't find the reason why tractor front axle is cracking constantly when tractor run?

This is gears damage. Replace gears. Roller bearings crumbled. Replace it.

I own this tractor about 5 years. Recently, motor start is very difficult. How to get rid of this?

Injection nozzle has clog. You must to diagnose injector. The fuel pump is not working. Repair fuel pump.

I have the same model. Explain to me what's problem if differential lock is defective suddenly? How to solve the problem?

This is the diaphragm rupture or disks of the friction clutch are worn out. Change worn components.

I'm using Kubota L3800 HST. Engine doesn’t want to work. Tell me what is problem?

We can assume fuel filter clogged. Or high-pressure fuel pump adjustment is not correct.

I have the problem. Motor overheating occurs. What kind of malfunction?

Lack of coolant in cooling system - Fill cooling system to proper level. Connecting rod or crankshaft bearings worn. Coolant flow route corroded. Engine overloaded. Adjust the gearing. Excessive engine load. Too much load - you must reduce the load or speed. Loose or problem fan belt. Adjust belt tension.

My father has Kubota L3800 Backhoe. Three days ago he heard a strange noise in the rear axle housing. What's wrong?

These symptoms evidence of bearing problems.

Can someone say me what is the reason that motor emits white smoke?

If white gas comes out of the exhaust pipe you required to change piston rings urgently. Incorrect injection timing - Adjust correctly.

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