rear end of the body. Unless otherwise
A rear bogie of the four-wheel type,
specified, on Type II tractors, the chassis
complete with axles, springs, torque rods
frame rails shall be cut off immediately to
and all other necessary parts shall be
the rear of the rear spring rear hanger
provided. The bogie shall be provided
brackets or the frame crossmember
with means permitting differential action
closest to the rear of these brackets.
between the two axles, and a manually or
When a RBM is specified, any frame
automatically controlled lockout assuring
combination of yield strength and section
equal power to each rear axle. The
modulus that provides the required RBM
manual lockout control used shall be
located in the truck cab.
is acceptable.
3.4.8 SUSPENSION.
3.4.9.2 TRACTION CONTROL.
The vehicle shall be equipped with the
manufacturer's standard or optional
Traction control shall be furnished for all
suspension system on the front axle. The
Type IV dump trucks and shall be either
rear suspension on all vehicles, except
ATC or D3 for both rear axles. For other
Type II, shall be the manufacture's
vehicle types, ATC, D1 or D3 shall be
standard or optional on/off road
furnished, when specified.
suspension. Type II vehicles shall be
furnished
with
the
manufacturer's
standard suspension, unless otherwise
specified. Except as specified in 3.2.6.1
3.4.10 WHEELS, RIMS AND TIRES
components shall have a rated capacity at
Unless wide base tires are specified, the
least equal to the load imposed on each
vehicle shall be equipped with single front
member, measured at the ground, with
and dual rear wheels. Rims and tire
the vehicle loaded to specified GVW.
ratings shall conform to Tire and Rim
Hydraulic double-acting shock absorbers
Association or European tire and Rim
shall be provided on the front axle when
Technical Organization recommendations,
the front axle rating is 5450 kg (14.000
for the type and size of tires furnished.
pounds) or less.
Tire and rim sizes shall be the same for all
wheels on each vehicle, except for tire
3.4.9
AXLES.
and rim sizes on Classes D, E, F, and G.
Except as specified in 3.2.6.1 and option
Unless otherwise specified, disc type
codes MPR and MPS, axle ratings shall
wheels shall be furnished. Hub-piloted
be at least equal to the load imposed on
wheels shall be provided.
each axle, measured at the ground, with
the vehicle loaded to specified GVW. The
wheel bearings and axle spindles shall be
oil lubricated except on front drive axles.
3.4.10.1 TIRES.
The hubcaps, except for driving axles,
Unless otherwise specified, standard
shall have a window for visual
profile steel belted radial ply tires shall be
determination of oil level. Provisions for
provided. Tires shall have highway tread
venting or withstanding internal pressure
on 6x4 vehicles and all terrain (AT) tires
buildup and for replenishing the oil supply
or on-off road (OO) tires on 6x6 vehicles,
shall be provided.
and the rear axle of dump trucks. The
rear axles of dump trucks shall have
3.4.9.1 REAR BOGIE.
Goodyear G244MSD, Michelin XDE M/S
or equal tires. Tires shall be of the
tubeless type. Except as specified in
Federal Standard 807M
Page 18 of 65
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