The hubcaps, except for driving axles,
equal to the load imposed on each tire,
shall have a window for visual
measured at each wheel, at the ground,
determination of oil level. Provisions for
with the vehicle loaded to specified GVW.
venting or withstanding internal pressure
Tires shall conform to the Tire and Rim
buildup and for replenishing the oil supply
Association or to The European Tyre and
shall be provided.
Rim
Technical
Organization
recommendations.
3.4.9.1
TRACTION CONTROL.
Automatic traction control shall be
3.4.10.2 TIRE CHAIN CLEARANCE.
provided on all Type IV dumps. Maximum
Tire chain clearance in accordance with
traction capabilities shall be maintained at
SAE J683 shall be provided. Allowance
all times under each drive wheel(s) for the
for spring deflection shall be included.
life of the vehicle.
3.4.11
BRAKES.
Brakes shall conform to Federal Motor
3.4.10
WHEELS, RIMS AND TIRES.
Unless otherwise specified, the vehicle
Carrier Safety Regulations 393.40 through
shall be equipped with single front and
393.43 and 393.45 through 393.52.
dual rear wheels.
Unless otherwise
Brake linings shall be of non-asbestos
specified Hub piloted, disc type wheels
material.
Class C vehicles shall be
shall be furnished. Disc wheel sizes shall
equipped with power assisted, hydraulic
be the same for all wheels except where
or air-hydraulic, service brakes.
required otherwise. Tire size and load
3.4.11.1 AIR BRAKES.
range (ply rating) shall be the same for all
The class D, E, F and G vehicles shall be
tires except class F vehicles or where
equipped with full-air brakes. The braking
required to be otherwise. The rear axles
system, complete with all necessary
of dump trucks shall have Goodyear
components, shall include:
G244MSD, Michelin XDE M/S or equal
tires. Tire and wheel assemblies shall be
(a)
Air compressor, unloader-head
balanced. When the front tires extend
type, engine driven and engine
beyond the cab fenders, rubber fender
lubricated, air or water cooled,
extensions extending at least to the
and having a capacity of not
outside of the tire tread shall be furnished.
less than 340 L/min (12 cubic
Tires and wheels shall conform to Tire
feet per minute (cfm)).
and Rim Association or to the European
(b)
Air storage reservoir(s), each
Tyre and Rim Technical Organization
tank equipped with drain, and
recommendations for the type and size
with safety and check valves
furnished. Under no circumstance shall
between the compressor and
the vehicle maximum governed speed
the last reservoir tank
exceed the speed rating of any of the
(c)
Foot control, suspended or
furnished tires or wheels.
treadle type
(d)
Air control valves
3.4.10.1 TIRES.
Unless otherwise specified, standard
(e)
Air pressure gage, visible to the
profile steel belted radial ply tires shall be
driver
provided. Tires shall have highway tread
(f)
Low air pressure warning,
on 4x2 vehicles and all terrain (AT) tires
visible and audible
or on-off road (OO) tires on 4x4 vehicles,
(g)
Service brake stop lamp switch
and the rear axle of dump trucks. Tires
(h)
Automatic moisture ejector on
shall be of the tubeless type. Except as
air storage reservoir
specified in option codes MPR and MPS,
(i)
Automatic slack adjusters on
tires shall be of rated capacity at least
Page 18 of 79
to verify that this 7 4Y
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