Quantcast Section Ill. OPERATION UNDER UNUSUAL CONDITIONS

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hicular cable from receptacle assembly or socket assem`-
bly
(figs. 28
and
29)
on
the
nose
of
the
semitrailer.
(4) Lower
landing
gear
(supports) (fig. 20). Release the
landing gear operating handcrank from its holder, en-
gage the handcrank on its shaft, and rotate the hand-
crank to cause the shoes of the landing gear legs to
make contact with the ground.
Engage
the
handcrank
in its holder.
(5) Uncouple
semitrailer
from
towing
vehicle.
Release
the
semitrailer
kingpin
1-3)
from
the
towing
vehicle
fifth wheel coupler jaw by pulling out jaw lock handle,
then driving the towing vehicle forward until the semi-
trailer becomes disengaged from the towing vehicle,
allowing the semitrailer to rest on its landing gear.
c. Operating Spare Wheel and Tire Carrier (fig. 30).
(1) R e m o v i n g s p a r e w h e e l a n d t i r e . W i t h w h e e l n u t w r e n c h ,
loosen two safety nuts which secure the studs of the
pickup member in the main member. Rotate the tire
slightly to free the studs and nuts from the slots.  F i t
the wheel nut wrench on the operating shaft, lift the
pawl, and permit the tire to lower itself on its cable
to the ground.
Caution: Maintain firm grip on wrench in lowering
wheel and tire to prevent injury.
Remove the safety nuts and release the pickup mem-
ber from the hub opening in the wheel.
(2) Installiing spare wheel and tire.  Insert the pickup mem-
ber in the hub opening, fit the securing studs in two
stud  holes  in  the  wheel,  and  screw  the  safety  nuts
loosely on the studs.  With  the  wheel  nut  wrench,  ro-
tate
the
operating
shaft
to
lift
the
wheel
and
pickup
member
until
the
studs
and
nuts
can
pass
through
the
holes
in
the
main
member.
Rotate
the
studs
in
the slots and anchor in place by tightening the safety
nuts.
32.
Operation
Under
Unusual
Conditions
a. General Conditions.
(1)
In
addition
to
the
operating
procedures
described
for
usual conditions, special instructions of a technical na-
ture for operating and servicing these semitrailers under
unusual conditions are contained or referred to herein.
TAGO 1321B
51



 


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