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TM 9-2330-272-14
2-12. UNCOUPLING SEMITRAILER FROM TOWING VEHICLE (Con’t).
b. If in a muddy, sandy, or snow-covered area, remove ground boards (8) from stowage brackets and place
on ground directly under shoes of landing gear legs (5).
c. Release handcrank (7) from stowage clip (6). Rotate handcrank counterclockwise to lower landing gear
legs (5) until shoes rest solidly on ground or ground boards (8). Return handcrank to stowage clip.
d. Disconnect towing vehicle intervehicular cable from semitrailer receptacle (3).
e. Close air shutoff valves on towing vehicle. Disconnect towing vehicle service and emergency air hoses
from semitrailer service air coupling (1) and emergency air coupling (2). Install dummy couplings in service and
emergency air couplings.
f. Push fifth wheel locking plunger lever (4) forward, then slowly drive towing vehicle a safe distance away
from semitrailer.
NOTE
Perform step g only if water or fuel accumulation is present on catwalk.
g. Release handcrank (7) from stowage clip (6). Rotate handcrank clockwise to raise landing gear legs (5)
until front of semitrailer is higher than rear of semitrailer. Allow water accumulation to drain.
2-13. BONDING AND GROUNDING PROCEDURES.
a. General Information.
(1) Static electricity is created whenever fuel is handled. Static electricity can also be created when
maintenance is performed on semitrailer. You cannot prevent static electricity.
(2) Static electricity becomes a danger when it builds into a charge that may form a spark. You can
prevent sparks by following proper bonding and grounding procedures.
TA702647
2-22
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