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In case the outreach limit switch (RK4) fails, overloading of the boom is prevented by a
second safety limit switch (RK5). Checking the adjustment of RK5
7. Disable the RK4 for measuring by connecting the terminals 9 and 30 inside the chassis
control panel with a jumper lead.
8. Also connect the terminal 58 and the terminal SR3:X2 on the safety relay using a jumper
lead.
9. Retract the telescope and then extend it again.
10. Measure the telescope cylinder's projecting part (L) and compare the measure with the
value for RK5 in the table in the chapter “Safety devices”.
11. If the projecting part is too long, readjust the RK5 and secure it again with a seal.
12. Restore the operation of the RK4 by removing the jumper leads from the terminal blocks.
13. Check the cover for the limit switches. If the cover has been damaged, it must be
replaced.
14. Put the cover for the limit switches back in place.
DANGER
WARNING
CAUTION
NOTICE
Always check the operation of both limit switches in connection with the service.
Remember to resume the operation of both limit switches after the adjustment.
