
Operator’s Manual for Crawler Crane
Crane
Operation
4-50
If derricking mechanism does not work for a long time, turn on derricking ratchet pawl
switch, and then reel off derricking winch slowly until ratchet pawl is engaged into the
ratchet wheel completely. At this time, the derricking rope can not be unwound
continuously.
When there is a need to move the boom, turn off derricking ratchet pawl switch, and
then spool up derricking winch to make ratchet pawl disengaged from the ratchet
wheel.
CAUTION
(1) Derricking operation should be performed stably. When the crane is lifting a load,
jerky operation will bring great impact on the crane.
(2) When the crane is lifting a load, the operator should not derrick boom towards
dangerous directions. Otherwise, the crane may topple over.
(3) Before derricking mechanism is operated, first derrick boom down a little, and then
operate ratchet wheel mechanism according to the correct methods mentioned
above. In this way, ratchet pawl can be disengaged from ratchet wheel successfully.
Do not operate the derricking mechanism before the ratchet pawl is disengaged
from ratchet wheel completely.
(4) Before switching off the derricking mechanism, press ratchet wheel switch and hold
it till the ratchet pawl engages with the ratchet wheel tooth.
(5) If ratchet pawl is not disengaged from ratchet wheel completely, derricking winch is
only permitted to spool up.
For reference only.
Operators manual should be consulted and adhered to.
Содержание ZCC1100
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