5.5
OPERATION
The crusher operates most efficiently, when
the crushing cavity is full.
Do not climb on the crusher, when it is in
operation and do not touch any moving parts.
Do not try to clear the blocked crushing cavity,
when the crusher is running. Be always very
careful when clearing the cavity.
When operating there must be all the time at
least 5 mm (3/16") oil under the main shaft
(adjusting piston).
Verify at least once a shift, that there are no
faults or problems with the crusher! Report all
changes in the crusher operation to the person
in charge immediately!
Stop the crusher without delay and take
necessary precautions if any problems appear!
Repair any faults prior to starting up!
SHOULD THE CRUSHER STALL UNDER
LOAD PROCEED AS FOLLOWS:
A stalled crusher MUST be treated as possibly
being jammed and therefore a potential
hazard.
Clear the plant area of all personnel. Notify the
manager or his deputy of a stalled crusher
situation. Switch off and lock out the crusher
to make sure it will not start.
NOTE ! Any inspection of the crushing cavity
must be carried out from inspection doors of
the hopper and crusher, not from above.
Tramp metal could be ejected from the
crushing cavity and cause serious damage.
Find out why the crusher stalled. If, after
careful examination, there appears to be no
electrical or mechanical reason why the
crusher has stalled, it would indicate that the
crusher is jammed by the ingress of foreign
matter and is in hazardous state.
If a crusher stalls under load, open the manual
valve which is located in the lubricating
device until the pressure gauge shows zero
pressure. Now there should be no more stored
energy in the mechanism except the weight of
the stones.
After releasing the pressure the tramp metal
can be safely removed.
If the main shaft must be lowered to remove
the tramp metal, use the following methods:
— Lower the main shaft by using the switch
in the lubricating device. If the main shaft
does not go down it means that only
adjusting piston goes down. In this case
move the adjusting piston up again until
pressure increases a little. Open the
manual valve which is located in the
lubricating device until the pressure gauge
shows no more pressure and try the next
method.
— Fill the cavity with rocks or use an
approved cover to make it safe. Place a
hydraulic jack between the upper frame
support and shaft nut. Push the main shaft
down. Be careful, the shaft may fall
rapidly.
— If none of the procedures above helps,
remove the upper frame to release the
pressure.
When the main shaft is in lowest position the
tramp metal should fall out of the cavity and
it can be removed. After that ensure that there
is no more tramp metal in the cavity. Then
restart the crusher.
GP200S
Crushing
5-4
140548
12/99