MAINTENANCE OF IMPACT CRUSHER

To guarantee the normal operation of the equipment and lengthen its service life, user should always perform maintenance on it.
1. After the new equipment is brought into service, make a thorough check of it each time when its work ends up. After it has operated for about two weeks, check it once a month. And the motor and the lubrication of the equipment should be checked wholly each week. The contents of checking should cover the fastening of fixed parts, belt transmission, the seal of bearings and switches of the electrical appliances.
2. Check the wear conditions of the main parts such as the hammers, the impact liners and the liners every week. And establish a system for periodical maintaining and replacing according to the maintenance cycle.
3.When the rotor is running, the gap between the rotor and the impact liner can’t be adjusted. If the material is blocked between the impact plate and the frame, hold up the impact frame slightly before adjusting the gap again. In this way, the gap will be loose and the impact frame easy to be adjusted. If the holding up of the impact frame isn’t sufficient, slightly beat the loose draw rod (to protect with a wooden plate). The gap between the rotor and the impact liner can be adjusted by the adjustment device of the equipment. First loosen the screw rod sleeve, then move the long nut, and the rod will move along the direction of the arrow. After it is adjusted, fasten tightly the screw rod sleeve. The gap size can be observed through the inspection door. The above work must be done after the equipment is stopped in case of accidents.
4. Replacement of tear & wear parts When replacing the tear & wear parts, open the back frame first. The equipment adopts ratchet device. Remove the connecting bolts between the back frame and middle frame first, then two person simultaneously operate the handles on the ratchet device at the two sides of the equipment. And the back frame is opened slowly. Meanwhile, make use of the hanging device on the frame to hang up the back frame. Move the reversing handle on the ratchet wheel and repeat the above process to close the back frame.
(1). Hammers When the hammers are worn to the certain degree, adjust or replace them timely in case the fasteners and other parts are damaged. Open the back frame via the ratchet device, move the rotor manually and turn the hammers needed to adjust or replace to the inspection door, and then fix the rotor. Remove the locating elements of the hammers: first shift the locating elements to the proper situation, and next remove the fastening block along the axial direction. Then push the hammers out from the inspection door in the axial direction, or hang it out from the middle of the frame. When remove it, knock it slowly with hand hammer. When installing the hammers, just reverse the above steps. However, pay attention that hammer with similar weight should be installed in the opposite positions in case of imbalance during its operation.
(2). The impact liners Open the back frame, remove cotter pins, slotted nuts and bolts used for fixing the impact liners, then replace the worn impact liners. If installing the new ones, just reverse the above steps.
(3). To adjust the liners, the back frame should be opened. All the liners are allowed to interchange serious abraded area with little abraded area. When a liner is worn out only on one side, it can be rotated for 90 or 180 degree for continual use. When the material blocks the impact frame, decrease the gap by putting gasket rings and bolts behind the impact liner beside the impact frame.
(4). The adjustment of gap between the bottom of inlet and the hammers. There is a quadrant iron at the bottom of the inlet. When one side is abraded, rotate it for 90 degree to control outlet of non-crushed material. When adjusting the quadrant iron, remove the square covers on both sides of the frame and pull out the quadrant iron, then after rotating it, install it.
5. Lubrication The user must comply with the lubricating instruction strictly to make sure the crusher works normally and efficiently.
(1). Frequently pay attention to and timely do well with the lubrication of the friction surface.
(2). Add lubricating grease in the bearings for every eight hours’ working. The bearings at two ends of the main shaft adopts molybdenum disulphide grease (3# lithium-based grease). (3). Change the lubricating oil every three months. Before changing the oil, wash the bearings carefully with clean gasoline or coal oil. The lubricating grease added to the bearings should be 50～70% of its capacity.
(4). Under normal circumstances, the temperature rise of the bearings should not exceed 35 degree. When the temperature exceeds 70 degree which is regarded as abnormal phenomenon, user should immediately stop the equipment, find out the reason and get rid of trouble. Then restart the equipment.

COMMON PROBLEMS & SOLUTION

Problem: Sudden increase of vibration
Solution:
Reinstall the hammers and balance the rotor.

Problem: Too large of the output size
Solution:
Adjust the gap between the former and the latter impact frame or change the impact liner and the hammers.

Problem: Knocking noise in the equipment
Solution:
1.Clean the crushing chamber after stopping the equipment;
2.Check the fastening situation of the impact liner and the gap between the hammers and the impact liner;
3.Change the broken parts.

Problem: Too high of the bearing temperature
Solution:
1.Check whether the lubricating grease is appropriate;
2.Change the lubricating grease after cleaning the bearing
3.Change the bearing.