and with hand control for
height of 3810 mm (12 feet 6
trailer brakes
inches) at an upper fifth wheel
height of 1250 mm (49 inches).
(f)
Two SAE J844 coiled air
Mounting and support ribs and
hoses, not less than 2800
any other components that
mm (110 inches) long
require manufacturer installation
when fully extended, with
from the inside of the cab shall
SAE J318 glad hand
be installed by the cab
couplers on both ends of
manufacturer.
Installation
hoses. The hoses shall be
openings shall be sealed to
packaged and stowed in
prevent air and water from
the
vehicle
tool
entering the cab. The deflector,
compartment for shipment.
including exterior mounting and
(g) Air connectors for trailer
supporting hardware, support
with SAE J318 glad hand
ribs
and
the
installation
couplers mounted at the
instructions, shall be securely
rear of the vehicle, located
stowed on the vehicle for
to prevent interference with
shipment.
a trailer. Air connectors
UN
UNDERSTRUCTURE, NESTED
and glad hands on Type IV
(DUMP BODY)
dumps shall be located to
When code UN is specified, a
prevent damage during
dump
body
with
nested
dumping of the cargo.
understructure shall be provided.
(h) Dummy glad hand couplers
The floor of the dump body shall
with security chains or
directly contact and be supported
cables.
by the longitudinal sills as well as
the crossmembers. Longitudinal
(i)
Prime mover only parking
sills shall be capable of supporting
brake valve to permit
the hoist load. Longitudinal for
mover parking brakes to be
class D, E, F and G shall have a
applied while charging the
RBM of not less than 52,000 N-m
trailer air brake system.
(460,000
inch
pounds).
TWD
TRACTOR WIND DEFLECTOR
Crossmembers
shall
provide
When code TWD is specified, a
support under the floor every 380
wind deflector shall be installed
mm (15 inches) or less. Each
or shall be furnished with the
crossmember shall pass through
vehicle
for
subsequent
the longitudinal and be shall be
installation on the cab roof by
securely welded to longitudinal.
the receiving activity.
The
Crossmembers shall have a RBM
deflector shall be of molded
of not less than 12 300 N.M.
fiberglass reinforced plastic;
(109,000
inch
pounds).
shall be not less than 1600 mm
Crossmembers shall be capable of
(63 inches) wide; and, unless
supporting an evenly distributed
otherwise specified (see 6.2),
load of not less than 6800 kg
shall be of a height suitable for
(15,000 lbs) for class C, 9070 kg
use with the vehicle cab
(20,000 pounds) for class D, 10
furnished in combination with
900 kg (24,000 pounds) for class E
semitrailer vans having a level
body and 1800 kg/m2 (370 pounds
Federal Standard 807M
Page 55 of 65
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