speeds, a neutral position, and a
reverse speed or, if hydraulic,
H4
COOLANT-PROTECTION-TO50
infinitely variable forward and
DEG C (-60 DEG F)
reverse speeds and a neutral
When code H4 is specified, the
position. The winch shall have a
percentage of antifreeze in the
single line pull capacity of not less
cooling
system
shall
be
than 133 kN (30,000 pounds) on
increased to provide protection
the bare drum. The winch shall
against freezing down to -50° C
conform to SAE J706. The winch
(-60° F).
shall be wound with not less than
46 m (150 feet) of 19 mm (3/4-inch)
HF
HIGH FLOTATION TIRES
diameter improved plow steel,
When code HF is specified, wide
independent wire rope core
base type tires and single
(IWRC), regular lay wire rope,
wheels for front and rear axles
equipped with a full capacity clevis
shall be provided.
Unless
hitch and hook eye.
otherwise specified, steel belted
The following equipment, complete
radial ply tires shall be provided.
with associated accessories, shall
Wide base wheels shall be
be mounted on the truck tractor:
interchangeable without the use
(a)
Rear-mounted tail roller, 200
of an adapter. The front track of
mm (8-inch) minimum diameter.
wide base tires shall be within
The installation of the winch drum
plus or minus 25 cm (10 in) of
and tail roller shall provide a
the rear track. Unless otherwise
clearance of not less than 50 mm
specified disc type wheels shall
(2 inches) between the winch cable
be furnished. When the front
and the top of the fifth wheel with
tires extend beyond the cab
the cable extended down over the
fenders,
rubber
fender
tail roller as in lifting operations;
extensions extending at least to
(b)
A cab protector of sufficient
the outside of the tire tread shall
structural strength to protect the
be furnished.
Under no
back and roof of the cab from a
circumstance shall the vehicle
winch
cable
whip-backlash
maximum
governed
speed
accident;
exceed the speed rating of any
(c)
Approach ramps designed
of the furnished tires or wheels.
for lifting folding gooseneck semi
trailers onto the fifth wheel with the
winch; also for coupling and
HTG
HYDRAULIC TAILGATES.
uncoupling fixed gooseneck semi
HTGC
When code HTG is specified, the
trailers to and from the tractor;
HTGU
tailgate shall fold vertically
(d)
Fifth wheel tilt limit devices
against the rear of the vehicle
to ensure the fifth wheel will be
for travel.
Unless otherwise
slightly higher than the top of the
specified (see 6.2), the hydraulic
approach ramps during loading,
tailgate shall have a rated
unloading, coupling and uncoupling
capacity of not less than 1361
operations.
kg (3,000 lb). When code HTGC
is specified, a spring loaded
cart-stop retention system shall
be furnished on the end of the
Federal Standard 807M
Page 38 of 65
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