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Operation of the crusher plant
Retighten screw connections
Select tightening torque
Because of setting of the screw connections respectively the components, screws can become loose.
The following mentioned screw connections of the crusher plant must be retightened after a first operating time of approx. 50 hours. Pay attention to the respective torque.
Drive connections at the crusher plant:
- Belt drive at the roll dirve - Belt drive - motor
Crusher housing - inlet side Crusher housing - outlet side Face connections pan - stageloader Attachments at the substructure with pan
Take the torque of the respective screw connection from the corresponding spare part drawing. If the spare part drawing gives no other information, the torques of table "Tightening torques - Screws resp. nuts with metric coarse thread DIN13" in chapter 5 are valid.
General
During normal operation please observe the following: Avoid to switch the crusher plant on and off without need. Feed the material at a fairly constant rate, if possible. Avoid overloading. Take care to ensure that the plant is serviced regularly.
Roll height adjustment
The roll height adjustment will be realized by the customer.
Danger! The passage height may only be adjusted when the crusher plant is in standstill! It must be secured against unauthorized restarting!
The passage height under the roll can be adjusted in different positions by means of hydralic cylinders (one time 40mm and two times 20mm = 80mm total). There are two hydraulic cylinders. They will be fastened at the impact roll (piston rod at the bearing housing, piston base at the pan). Pressure fluid is oil / face hydraulic.
Important! The impact roll is in neutral position (lowest position) when BOTH spacing plates of 20mm and ONE spacing plate of 40mm are located ABOVE the bearing housing. TWO spacing plates of 40mm thickness are located UNDER the bearing housing (see figure 15)! Notice! The both spacing plates under the bearing housing may not be removed!
The desired passage height will be achieved by uniformly raising or lowering the impact roll by means of the hydraulic cylinders attached underneath the bearing housing. The following describes the procedure for raising the impact roll. The hydraulic cylinders can be pressured either by a hydraulic pump or by the customer sided face hydraulic. Lowering is analogous (see figures 14 and 15).
Notice! The quantity and thickness of the spacing plates located under respectively above the bearing housing must be the same on both sides!
Loosen and remove the 4 fastening borders at the crusher housing.
Figure 14: Fastening borders
Fastening borders on both sides
Loosen the screw connections between crusher housing and bearing housing. For this the tensioning nut must be loosened (see operating manual from P&S in the annex). The threaded rod is equipped with a hexagonal end (30mm width) on both sides. Hold against with a wrench so that the threaded rod does not rotate while the nut is being loosened.
Remove the required spacing plates located above the bearing housing on both sides. Take care that there are two bolts (∅20mm) on the top side of each spacing plate which come approx 10mm into the above located plate. Raising the impact roll is by means of the hydraulic cylinders located at the side of the crusher housing, under the bearing housing. As noted above they will be pressured by a hydraulic pump respectively the customer sided face hydraulic.
Notice! Uneven raising of the bearing housings can lead to damages of the bearings and sealings. While raising the level difference on both sides must not be more than maximal 20mm!
The above removed spacing plates will be placed under the respective bearing housing. The inflow of hydraulic oil to the cylinders must be controllable. So, the uneven weight distribution can be compensated. Lower the impact roll slowly.
The flow of hydraulic oil out off the cylinders must be controllable.
Take care that the impact roll does not cant while lowering. Fasten the bearing housing. Necessary torque = 32Nm. The roll must be free to rotate. The distance between impact roll and side wall of housing must be equal allover the circumference. Press grease at both nipples on the front side of the bearing housing.
This protects the threaded rods against corrosion and the disassembly will become easier. Retighten the belt drive. Perform a test run. (Figure 15: Roll height adjustment on the next page)
Figure 15: Roll height adjustment
2,3
1
Attention! Here shown with one spacing plate of 40mm thickness under the bearing housing; In fact TWO spacing plates of 40mm thickness must always remain under the bearing housing!
1 Spacing plates (20mm and 40mm thickness) 2 Threaded rod 3 Tensioning nut
