To maintain the reliability of your wheel loader, it is vital to properly service its diesel engine. The engine gives the loader the power it needs to perform its tasks efficiently so it is important to keep it running in excellent condition. However, unexpected circumstances may occur when the engine does not perform as expected. In these situations, it will be helpful for you to know how to trouble-shoot the engine so you can safely resume operating the wheel loader. In this article, we discuss different situations where the engine is not working properly and provide guidelines on trouble-shooting the problem.
The engine is difficult to start
Difficulty in starting the engine has various possible causes. One cause may be that the engine fuel has become viscous and is not flowing smoothly. In this situation, check the fuel tank and filter. Remove water, dirt and other impurities that may be mixing with the fuel. Also check the diesel quality. Keep in mind to only use diesel fuel in diesel engines. Do not mix diesel fuel with other liquids.
Difficulty in starting the engine can also be due to air or water mixed in the fuel system. Air in the fuel filter or injection lines has a negative effect on the work of the fuel pump. To get an ideal pressure for the fuel injection, pay attention to loose fuel line connections and loose covers or nuts. Release the vent plug on the fuel filter and the vent screw in the fuel injection pump to drain all air from the fuel system.
Leaky valves and low compression can also cause difficulty in starting the engine. Make sure to lap in the corresponding valves. Inappropriate valve or excessive wear of rings, pistons and liners can cause low and insufficient pressure. If there is excessive wear and tear in these parts, replace them with new ones.
When you are unable to start the engine of your wheel loader, it is also possible that the battery is empty. In this situation, change the battery or make sure that the battery is always charged to full. During winter or in very cold weather, remove the battery from the wheel loader and keep it indoors. Install the battery only when you are about to use the loader.
The output of the engine is insufficient
When you notice that the engine is not functioning to its maximum output level, check your fuel supply. Insufficient fuel supply causes low engine output. Make sure that your diesel engine has fuel. Also check the fuel lines and fuel pump.
Insufficient output is also caused by overheating of moving parts. In this situation, check the lubrication oil system and the engine oil pressure. Also check if the lubricating oil filter is working properly. Poor lubrication can occur when the filter element is deposited with impurities. In this case, change the filter element.
A dirty air cleaner and wrong fuel injection timing can also cause insufficient output. Make sure to clean the air cleaner every 100 hours of operation and adjust injection timing exactly.
The engine suddenly stops
Insufficient fuel is a common cause when the engine suddenly stops. Check the fuel tank and refill the fuel if necessary. Also check the fuel system for air or leaks. A bad nozzle can also cause the engine to stop in the middle of operation. In this case, replace it with a new nozzle.
It is also important to keep proper lubrication of all moving parts to avoid overheating. Overheating can cause the engine to suddenly stop. Check the engine oil and the lubrication oil system. Also make sure to replace oil filter cartridge every two times of oil change.
When the engine has suddenly stopped, turn the engine lightly by pulling on the fan belt. If the engine turns easily, then the problem is usually just insufficient fuel or a bad nozzle.
Some final words
Instructions for trouble-shooting the engine of your wheel loader are usually detailed in the user manual so make sure to read it thoroughly. If you are experiencing persistent problems with the diesel engine, contact your wheel loader supplier to have it checked or serviced if necessary. Most suppliers will offer repair or replacement warranties for parts under specified terms and conditions.
To find the most appropriate wheel loader for your requirements, contact a trusted wheel loader manufacturer as they can give you the best advice on the type of wheel loader that will be a worthwhile investment for you.
This article was written by Tom Jerrat for Schaffer Loaders. Schaffer Loaders is the premier supplier of industrial quality German-built articulated, front end and wheel loaders in Australia. Visit schaffer-loaders.com.au for more information.
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