adequate size, properly braced,
from topping the snowplow. The
and reinforced to sustain the loads
snowplow shall be equipped with
imposed under severe operating
two heavy duty steel casting, full
conditions.
The hitch shall be
swivel shoes or tow caster wheels
removable.
for classes B through E. Both the
caster wheels and swivel shoes
The hydraulic system shall consist
shall be adjustable. The caster
of a power operated pumping unit,
wheels shall be roller or ball
a hydraulic fluid reservoir or a
bearing mounted, shall be of the
reservoir integral with the hoist,
shielded type to prevent entrance
controls, cylinder, hoses, piping,
of water and foreign matter, and
and all other parts essential for
shall have lubrication fittings.
normal operation. The hydraulic
system shall comply with the
The push-frame assembly shall
requirements
in
paragraph
attach to the moldboard and hitch
3.1.1.11. Controls to the pumping
in a manner to provide ample road
unit shall be operable by the truck
clearance of the assembly and
driver in his normal seated
permit sufficient oscillation for the
operating position and shall not
snowplow to follow road contour
interfere with the operation of any
and clear snow evenly.
The
truck controls. The hydraulic pump
positioning of the snowplow
shall be powered by the engine
moldboard to the right and to the
crankshaft
or
transmission
left shall be of the manual angling
mounted PTO.
The snowplow
type and shall be capable of being
hoist cylinder shall have sufficient
accomplished by one man without
travel to hoist the plow to not less
the use of tools. The snowplow
than 200 mm (8 inches) ground
shall have a minimum of two angle
clearance.
The
hoisting
adjustments both to right hand cast
mechanism, hoist cylinder and
and left hand cast. A shear pin
hydraulic system shall be capable
shall be used to lock the snowplow
of holding the snowplow in the fully
in any of its five plowing positions.
raised position while the truck is
Under normal plowing conditions,
driven over secondary gravel roads
the shear pin shall be designed to
at speeds up to 48 km/h (30 mph).
minimize damage to the snowplow
and vehicle should the snowplow's
Hydraulic lines to the hydraulic
leading edge come into contact
cylinder and the pump shall be
with an immovable object.
provided with quick disconnect
hose couplers. Hose caps, pump
The plow hitch shall be of the push-
caps and hydraulic cylinder caps
frame type designed to be attached
shall be provided if no other
to and transmit the entire plowing
protection system is provided.
thrust to the truck frame in such a
Caps shall be secured with a
manner that no plowing thrust shall
corrosion-resistant security device
be absorbed by the truck front axle.
to prevent loss. Caps shall prevent
Front axle hitch supports, when
entrance of contaminants into the
used, shall be attached in a
hydraulic
system
when
manner to prevent chafing or other
disconnected.
damage.
Hitch
mainframe
members and lift frame vertical and
A set of raised auxiliary dual beam
horizontal members shall be of
headlights, parking, and turn signal
Federal Standard 807M
Page 45 of 65
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