Landoll 318C, Operator'S Manual

Page: 37 / 76

3-20 REAR IM PACT GUARD SYS TEM
Ve hi cle stan dards FMVSS No. 224, Rear Im -
pact Pro tec tion, re quires all trail ers man u fac tured
af
ter Jan u ary 26, 1998 shall be equipped with a
rear im pact guard cer ti fied by the man u fac turer as
meet
ing FMVSS No. 223, Rear Im pact Guards.
The guard, or bumper, (See Fig ure 3-8) meets the
fol low ing requirements:
·
a minimum of 4 inches vertical height
·
extend laterally to within 4 inches of the
sides of the trailer
·
a ground clearance of no more than 22
inches
·
placed no more than 12 inches from the rear
of the trailer.
·
capable to deflect 5 inches.
The stan dard also spec i fies min i mum force
and en ergy ab sorp tion re quire ments for the guard.
A DOT de cal cer ti fies that the guard meets FMVSS
No. 223 and 224 stan
dards. The de cal is placed
and must re main at all times on the for ward fac -
ing sur face of the guard, 12 inches in board of the
curb side and of the guard.
See Fig ure 3-8 for lo -
ca tion of de cals.
Re place any com po nent that does not al low
the above min i mum re quire ments to be met. Any
hard ware that holds the rear im pact guard and be -
comes dam
aged or be comes loose shall be re -
moved and re placed. The 3/4" grade 8 screws that
hold the bumper en ergy pack shall be loctited and
torqued to 280 ft.-lbs.
DAN GER
AL WAYS CHECK THE CON DI TION OF
THE REAR IM PACT GUARD SYS TEM.
IF GUARD SYS TEM HAS BEEN DAM -
AGED, IT MUST BE RE PLACED. FAIL -
URE TO MAIN
TAIN GUARD SYS TEM
MAY RE SULT IN IN JURY OR DEATH TO
OTHERS.
3-21 ANTI-LOCK BRAKE SYS TEM (ABS)
Ve hi cle stan dards FMVSS No. 121, anti-lock
brake sys tem re quires all trail ers with air brake
sys tems to have ABS af ter March 1, 1998. Each
trailer (in clud ing a trailer con verter dolly) shall be
equipped with an anti-lock brake sys tem that con -
trols the wheels of at least one axle of the trailer.
Wheels on other ax
les of the trailer may be in di -
rectly con trolled by the anti-lock brake system.
NHTSA Docket 92-29; no tice 11 pub lished
Sep tem ber 23, 1996 spec i fies the ABS warn ing
light be mounted near the rear of the left side of
the trailer
(See Fig ure 3-8) .
·
Decal or lens marking with ABS to identify
the lamp.
·
The lamp must illuminate one time whenever
power is supplied to the ABS. At any time
the light remains on when power is supplied
there is a malfunction to the system.
The ABS used on the semitrailer is a Rockwell
Wabco unit. Sin gle axle trail ers use a two sen sor,
one mod u la tor sys tem. Tan dem and tri ple axle
semitrailers use a four sen sor, two mod u la tor sys -
tem. Sen sors are lo cated at each hub of the front
and rear ax
les, and each mod u la tor con trols one
side of the trailer.
The ABS is con stant pow ered by the aux il iary
(blue) cir cuit, cen ter pin on the semitrailer seven
way elec tri cal con nec tor. This cir cuit must be hot
when ever the trac tor keyswitch is on. This cir cuit
must also not be used to power any ad di tional
elec tri cal de vices while the semitrailer is mov ing
for ward. How ever, ad di tional de vices such as re -
mote con trols may be pow ered from the aux il iary
cir cuit while the semitrailer is sta tion ary. Back up
power to the ABS is sup plied through the stop
lamp (red) cir cuit, No. 4 pin on the seven way con -
nec
tor, and ground is sup plied by the white wire,
No. 1 pin.
3-25