Landoll 440B Series, Operator'S Manual, Page: 36 / 84

3-24 F-1013-1118
OPERATING INSTRUCTIONS
TABLE OF CONTENTS
Rear Impact Guard System
Vehicle standards FMVSS No. 224, Rear Impact
Protection, requires all 440B/455B Series trailers
manufactured after January 26, 1998 shall be equipped
with a rear impact guard certified by the manufacturer as
meeting FMVSS No. 223, Rear Impact Guards. The
guard, or bumper,
( See Figure 3-17 ) , meets the following
requirements:
• minimum of 4 inches vertical height
• extend laterally to within 4 inches of the sides of the
trailer
• 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 standard also specifies minimum force and energy
absorption requirements for the guard. A DOT decal
certifies that the guard meets FMVSS No. 223 and 224
standards. The decal is placed
and must remain at all
times on the forward facing surface of the guard, 12
inches inboard of the curb side and of the guard.
(See Figure 3-17 ) for location of decals.
Replace any component that does not allow the above
minimum requirements to be met. Any hardware that
holds the rear impact guard and becomes damaged or
becomes loose shall be removed and replaced. The 3/4”
grade 8 screws that hold the bumper energy pack shall
be loctited and torqued to 280 ft.-lbs.

DANGER
Anti-Lock Brake System (ABS)
Vehicle standards FMVSS No. 121, anti-lock brake
system requires all trailers manufactured after March 1,
1998 with air brake systems to have ABS. Each trailer
(including a trailer converter dolly) shall be equipped with
an anti-lock brake system that controls the wheels of at
least one axle of the trailer. Wheels on other axles of the
trailer may be indirectly controlled by the anti-lock brake
system
( See Figure 3-17 .)
NHTSA Docket 92-29; notice 11 published September
23, 1996 specifies the ABS warning light be mounted
near the rear of the left side of the trailer
• 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 commercial unit.
Single axle trailers use a two sensor, one modulator
system. Tandem and triple axle semitrailers use a four
sensor, two modulator system. Sensors are located at
each hub of the front and rear axles, and each modulator
controls one side of the trailer.
Always check the condition of the rear impact
guard system. If guard system has been
damaged, it must be replaced. Failure to maintain
guard system may result in injury or death to
others.