Operation of the crusher plant

Check the following points during the test run: Perform test run of approx. 0.5 hours at no load:

Particularly check temperature of the bearings, running noises, leakages at bearing points, vibrations etc. Perform trial run under load:

Increase load gradually up to rated load. While doing so, check drives for rises in temperature, running noise, vibration, and leakages. Check function of the safety devices. Check for uniform and equal current consumption of the electric motors. Check that gearboxes run smoothly.

Notice! Immediately stop the crusher plant by operating the Emergency Stop switch in the event of faults, inexplicable noises and movements!

When no defects have been found during the trial run or all defects found have been eliminated the crusher plant can be put into operation.

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:

– Gearbox - drive – Gearbox - motor – Gearbox - gearbox holder

Crusher housing - inlet side Crusher housing - outlet side Face connection 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 passage height under the roll can be adjusted in 3 different positions by means of hydralic cylinders (three times 40mm = 120mm total). Pressure to the hydraulic cylinders will be given from the hydraulic pump (hand pump). Pressure fluid is oil (see "Hydraulic fluids" in chapter 5 "Technical data").

Danger! The passage height may only be adjusted when the crusher plant is in standstill! It must be secured against unauthorized restarting! Notice! The impact roll is in neutral position (lowest position) when all spacing plates are located above the bearing housing (see figure 16).

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. Lowering is analogous (see figure 16).

Notice! The spacing plates located under respectively above the bearing housing must be of the same quantity and thickness on both sides of the impact roll!

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 hexagon (key width 30mm) on both sides. Hold against with a key that the threaded rod does not rotate with the connection while loosing. 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. The hydraulic pump (hand pump) is located in the accessories. The plugin connections are located at the crusher housing.

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 flow of hydraulic oil to the cylinders can be controlled over the stop valves. So, the uneven weight distribution can be compensated. Lower the impact roll slowly.

For this open the safety relief valve at the hydraulic pump slowly.

Take care that the impact roll does not cant while lowering. If necessary regulate with the stop valves.

Fasten the bearing housing. For tightening the tension nut see operating manual from P&S in the annex.

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. The position of the gearbox must be fitted / adapted adequately. For this the hydraulic pump (hand pump) can be used also. Perform a test run.

Figure 16: Roll height adjustment

2,3

1

4

1 Spacing plates (40mm thick) 2 Threaded rod 3 Tensioning nut 4 Rod for fastening the hydraulic cylinder with the hydraulic pump

Danger! The entrance to the annulus of the cylinder must never be blocked, because the movements of the cylinder can build up pressure extremely. Serious injuries or even death can be the result when pressure passes out off defect lines! Warning! No overpressure must be build up when the piston rod extends!