Running-in is crucial to guarantee the crane safety and a long service life of cranes. After the running-in period, movable parts can have their surfaces fully grinded. Therefore, the new crane’s running-in phase should never be neglected for crane safety at construction sites.
The following instructions should be kept in mind for the running-in for crane safety.
1. In the running-in period, keep the lifting load always less than 75% of load rating.
2. Have the new crane run in for 2000km.
3. After cold start of the engine, do not speed up the engine until its temperature rises to a normal value.
4. Run in the crane on flat and level surfaces.
5. Shift gear timely and engage clutch smoothly, so as to avoid abrupt acceleration or emergency brake.
6. Gear down before climbing up a slope to prevent the engine from rotating at a too low speed.
7. Inspect and control the pressure of engine oil and coolant. Always check the temperature of transmission, rear axle, wheel hubs and brake drums. Find out the cause if any overheated part is found and conduct adjustment or repair without delay.
8. After the first 50km’s travel and every time after wheel replacement, bolt down the wheels with the specified torques.
9. Check the bolts and screws, especially those of cylinder cover, for looseness. After 300km’s travel, bolt down the cylinder cover in specified order before the engine is cooled down.
10. After running-in, it’s compulsory to carry out maintenance to the crane chassis.
Crane safety is a vital issue throughout the construction period. After purchasing a new crane, keep in mind to run in it for the safety of workers and smooth completion of projects.