After a loader leaves the factory, it is generally specified that there is a break-in period of about 60 hours (sometimes called a running-in period). This is based on the technical characteristics of the loader in its initial use. The break-in period is a crucial step to ensure the normal operation of the loader, reduce the failure rate, and extend its service life. Some users, due to a lack of loader operation knowledge, tight deadlines, or a desire to quickly generate profits, neglect the special technical requirements of the break-in period for new machines. Some users even believe that since the manufacturer provides a warranty, they will be responsible for repairs if the machine breaks down. As a result, they use the machine under excessive load for extended periods during the break-in period, leading to frequent early malfunctions. This not only affects the normal use of the machine and shortens its service life but also affects the project schedule due to machine damage. Therefore, the application and maintenance of the loader during the break-in period should be given full attention.
Break-in Period
Rapid Wear Rate: Due to factors such as the processing, assembly, and adjustment of new machine parts, the friction surfaces are rough, the contact area of the mating surfaces is small, and the surface pressure is uneven. During machine operation, the uneven surfaces of parts interlock and rub against each other. Metal debris worn off acts as abrasive, further accelerating wear on mating surfaces. Therefore, the break-in period is prone to rapid wear on parts (especially mating surfaces). Overloading during this time can damage parts and lead to premature failure.
Poor lubrication: Newly assembled parts have small clearances, and due to assembly issues, it's difficult to ensure uniform clearance. Lubricating oil (grease) cannot easily form a uniform film on the friction surfaces to prevent wear. This reduces lubrication efficiency and causes premature abnormal wear. In severe cases, it can cause scratches or seizing on precision-fitted friction surfaces, leading to malfunctions.
Loosening: Newly machined and assembled parts have geometric and dimensional deviations. In the initial stages of use, due to alternating loads such as impact and vibration, as well as factors like heat and deformation, coupled with rapid wear, previously tight parts are prone to loosening.
