8. Lift the load to the desired height. For safety, lift the
load no higher than necessary.
The crane is equipped with a two block system, in the
event that the hook or block is raised beyond a safe po-
sition, a warning light appears on the dash and, if horn
switch is activated, an audible warning will sound.
Some cranes may be equipped with control discon-
nects which will prevent the winch from raising the load
and the boom from extending or lowering. To continue
crane operation, retract or raise the boom and/or lower
the hook.
If the operator wishes to raise the hook block beyond
the point at which the two block is activated, he may
override the system by using the key switch (shown in
control and instrument sections).
Continuing to pull the block up after contact has been
made with the boom head may result in damage to
boom head and sheaves or the cable may be broken
causing the load to drop.
9. Swing and spot the load over the location where it is
to be deposited.
10. Lower the load and unfasten the hook.
When spotting the load it may be necessary to alter the
boom length or boom angle. In making these adjust-
ments, the operator must guard against exceeding the
rated load as determined by the load rating charts.
When operating a hydraulic crane, the operator should
realize that hydraulic and structural competence, NOT
TIPPING LOAD, is often the determinant of lifting ca-
pacity.
Therefore, THE OPERATOR MUST BE GUIDED
SOLELY BY THE APPROPRIATE MANUFACTUR-
ER’S LOAD RATING CHART OR BY THE LOAD RAT-
ING PLATE MOUNTED ON THE CRANE when
considering load weight. The manufacturer’s rated
loads must never be exceeded.
Cranes which are factory equipped with auxiliary
winches may require additional counteweight if the
auxiliary winch is removed. Refer to the capacity chart
(load rating plate) for the required counterweight total.
When lowering light loads, be sure to maintain suffi-
cient cable tension to prevent the cable from becoming
loose on the cable drum. Loose cable can slip and then
bind suddenly, causing “jerky” lowering and shock
loading of the boom. Loose wraps may form loops
which can be overlain when the cable is wound onto
the winch drum. These conditions can result in person-
al injury or property damage.
OPERATING PROCEDURES
Revised: October 20053 - 9RT700