3-8
PRE-COU PLING OF SEMITRAILER AND TRAC TOR
3-8.1
Slowly back the trac tor/truck (tow ing ve -
hi cle) up to the front end of the semitrailer so
the king pin of the semitrailer is cen tered be -
tween the trac
tor fifth wheel jaws. Stop the
tow
ing ve
hi
cle just inches ahead of the
semitrailer. Set trac tor park ing brake.
3-8.2
Check the semitrailer king pin plate
height. The king pin plate should be the
same height, to slightly lower, than the latch
area of the fifth wheel plate of the tow ing ve -
hi
cle. If nec
es
sary, con
nect the trac
tor hy
-
drau lic lines, or start the semitrailer hy drau lic
power en
gine. Use the
5TH WHEEL TILT
LE VER
(For op er at ing in struc tions, see
Sec tion 3-2.1)
to raise or lower the king
pin
plate suf
fi
ciently to al
low proper cou
pling.
Drain all air and mois ture from the tow ing ve -
hi cle air brake sys tem fol low ing tow ing ve hi -
cle manufacturer’s instructions.
3-8.3
Con nect the ser vice and emer gency air
hoses of the tow
ing ve
hi
cle to their re
spec
-
tive glad hand on the front of the semitrailer;
red emer gency line to the glad hand with the
“EMER GENCY”
tag, and the blue ser
vice
line to the glad hand with the
“SER VICE”
tag
(See Fig
ure 3-5).
Chock the semitrailer
wheels be
fore ac
ti
vat
ing the semitrailer air
sup
ply valve in the tow
ing ve
hi
cle. Set the
parking brakes.
WARN ING
FAIL
URE TO CHOCK SEMITRAILER
WHEELS COULD AL LOW MOVE MENT
OF THE SEMITRAILER RE SULT ING IN
SE RI OUS PER SONAL IN JURY, DEATH,
OR DAM
AGE TO PROP
ERTY IN ITS
PATH.
3-8.4
Check the air brake op
er
a
tions of the
semitrailer as fol lows:
a.
Ap ply brakes and in spect brake ac tion on all
wheels for prompt ap pli ca tion.
b.
Re lease brakes. All brakes should re lease
im me di ately. Air pres sure should dis charge
quickly from the re lay emer gency valve.
c.
Dis con nect the emer gency air line from the
semitrailer glad
hand. Trailer brakes should
promptly set.
d.
Re-con
nect the emer
gency air line to the
semitrailer and ac
ti
vate the semitrailer air
sup
ply valve. The semitrailer brakes should
set.
3-11
FIG URE 3-5 RE MOTE CON TROL SWITCH PANEL
Summary of Contents for 318C
Page 3: ...MODELS 318C BOEING TRAILER OPERATOR S MANUAL PURCHASED FROM DATE ADDRESS PHONE NO SERIAL NO i...
Page 8: ......
Page 12: ......
Page 32: ...3 20 FIGURE 3 6 STEPS FOR LOADING AND UNLOADING...
Page 36: ...3 24 FIGURE 3 8 REAR IMPACT GUARD AND ANTILOCK BRAKE SYSTEM...
Page 52: ...4 14 FIGURE 4 6 CHECKING AXLE ALIGNMENT FIGURE 4 7 EXAMPLES OF CAMBER...
Page 56: ...4 18 FIGURE 4 10 AXLE AND BRAKE ASSEMBLY...
Page 64: ...4 26 FIGURE 4 16 MOUNTING TIRES AND WHEELS FIGURE 4 17 STUD TIGHTENING SEQUENCE...
Page 76: ...5 10 NOTES...
