TM 5-3810-295-34
CHAPTER 8
REPAIR OF SAFETY DEVICES
Section I. REPAIR OF LOAD SAFETY COMPUTER
WARNING DEVICE ASSEMBLY
given operation. Refer to TM 5-3810-295-12 for more
8-1.
Description
information concerning program cards.
a. The load moment safety warning assembly
c. The load moment safety device (Figure 8-
(trade name" Lode-Safe-T-Computer" (LTC)) is designed to
1) is required for all dockside, ship loading/unloading
warn the operator when the angle of the boom or load
operations.
or a combination of both reach an unsafe limit. The
(1) If your load moment safety device
warning assembly consists basically of a computer con-
fails, and your crane is used to perform dockside, ship
sole, a remote indicator, a selector switch, a boom angle
loading/unloading operations, follow authorized
indicator, load cells, a warning bell and connecting cables.
troubleshooting procedures.
b. The components of the warning device
If the malfunction is not corrected by troubleshooting,
function as follows: (see fig. 8-1)
remove the entire assembly (Figure 8-1), including all
(1) The load cell assembly is located in the
units and connecting wiring, and return it to the factory
boom suspension line. The cell measures the tension in the
for repair and recalibration as a complete unit.
line caused by the load. The tension is converted into
(2) Missions other than dockside, ship
an electrical signal and transmitted to the load computer
loading/unloading operations may be performed using
console.
only the load chart located in the upper crane cab and
(2) The boom angle transducer is mounted on
the mechanical boom angle indicator located on the
the lower end of the boom base section. The transducer will
lower crane boom. If your load moment safety device
determine the angle of the boom with respect to ground
fails, and your crane is not used to perform dockside,
level. This measurement will also be converted into an
ship loading/unloading operations, follow one of these
electrical signal and transmitted to the load computer.
options:
(3) A program card selected by the crane
(a) Remove the device and turn it
operator for a particular type of operation (see TM
in to your PDO.
5-3810-295-12) is placed into the load computer. The
(b) Troubleshoot and repair using
program cards are wired for different types of opera-
the procedure outlined in para (1) above.
tion i.e. tires and floats and stored in the crane cab.
8-2.
Removal
(4) The load computer, based on the
WARNING
information it receives from the load cell, angle transducer,
Prior to performing work on load moment
and program card, will send signals to the visual remote in-
safety device, disconnect battery to prevent
dicator and bell when the unsafe load has been approached
electrical shock.
(90 percent) or reached.
NOTE
(5) The correct program card must be inserted
Prior to removing wires and cables insure
into the load computer to give an accurate reading for a
they are tagged and identified to aid in re-in-
stallation.
a. Refer to figure 8-2 and remove wiring as
required per paragraph 8-5.
b. Remove the load moment safety
components as required after performing testing per
paragraph 8-5.
Change1 8-1
