Terex T300-1, Operator'S Manual

Page: 192 / 528

Apply the swing brake, with the foot pedal, when the swing is stopped or when
emergency situations dictate that the swing be terminated abruptly.
If properly executed, the load will hang motionless when the swing is terminated. If the
load is oscillating, the swing was made too rapidly and/or stopped too abruptly.
Never pull sideways with a crane boom. Crane booms are not designed for
excessive side pull and may collapse if subjected to excessive side loading.
6. Extend the boom to the desired length. Do not extend the boom further than
necessary to perform the lift. EXTEND the boom by pushing the LH foot pedal
FORWARD or by pushing the LH joystick lever FORWARD and RETRACT it by pulling
the joystick lever BACK.
While extending the boom, be sure to pay out sufficient hoist rope to prevent the
hook block from being drawn up to the boom peak. The force of the extend
cylinders can easily break the hoist line, dropping the hook block and load which
may result in personal injury or property damage.
The boom extend function on this crane has two positions and two speeds. When the
lever is all the way forward, the regenerative mode provides increased speed. With the
lever approximately one half of the way forward, increased “PUSH” is available at
reduced speed.
7. Lower the hook block to the load and fasten the hook.
Before making any crane lift, make sure the hook is properly engaged with the slings,
or lifting device employed to make the lift. Be certain the hook latch is not supporting
any of the load.
Hook latch is intended to retain loose slings or devices under slack conditions. It
is not intended to be an anti-fouling device, so caution should be used to prevent
the latch from supporting any of the load. Periodic inspection of the latch must be
made to insure its proper operating condition.
Hoisting or lowering of the load with the winch is controlled by the winch lever.
LOWER the load by pushing the lever FORWARD and RAISE the load by pulling the
lever BACK. Improved control is obtained by operating the engine at low speed while
“metering” the control. Always actuate and release this lever slowly to minimize
dynamic effects of the load and to prevent “bird nesting” of the cable on the winch drum.
To shift the winch into the high-speed, select high speed using the two speed switch.
When slowing the winch, slowly return winch lever to neutral position to bring the load
to a gradual stop.
8. Lift the load to the desired height. It is good operating practice to not lift the load any
higher than necessary.
The crane is equipped with an anti two-block system which includes a warning light,
audible alarm, and control disconnects. When the hook block or ball activate a
191 P/N 12261-683 REVISED: January 2015