u. Secondary Hoist Brake Lock (10). Push this
to the swing brake hydraulic line. This retains the
pressure applied to the swing brake when the swing
handle down to engage the pressure retaining valve
lever is pushed forward or away from the operator. To
connected to the secondary hoist brake hydraulic line.
release the pressure retaining valve, apply pressure to
This retains the pressure applied to the secondary hoist
the swing brake lever, then raise the handle and
brake when the brake pedal is pushed down. To release
gradually release pressure on the brake.
the pressure retaining valve, apply pressure to the brake
pedal, then raise the handle and gradually release
w. Reservoir Air Pressure Gage (12).
pressure on the brake.
x. Reduced Air Pressure Gage (13).
v. Swing Brake Lock (11). Push this handle down
to engage the pressure retaining valve connected
Section IV. OPERATION OF EQUIPMENT
Raise gantry to the intermediate position and install
hoisting power, to operating position (fig. 11). Install
a. The instructions in this section are published for
compression members and secure with connector pins
the guidance of the personnel responsible for operation
of the Model 1125 Crane.
b. The operator must know how to perform every
operation of which the Crane is capable. This Section
gives instructions on starting and stopping the Crane,
basic motions of the crane, and co-ordinating the basic
motions to perform the specific tasks for which the
equipment is designed. Since nearly every job presents
a different problem, the operator may have to vary
procedures to fit the individual job.
a. Preparation for Starting. Perform the necessary
to figure 8 and start the engine.
to figure 9 and stop the engine.
b. Perform the necessary daily preventive
18. Operation Under Usual Conditions
b. Raise the gantry.
Figure 8. Starting the engine.
The lowered position of the gantry
auxiliary lifting device is required
when raising or lowering the gantry
from this position.