3.4
CHASSIS COMPONENTS.
consistent with maintaining a satisfactory
level of competition without adversely
3.4.1
ENGINE.
affecting performance requirements or
The engine furnished for the specified
exposing supplier's employees to undue
vehicle class shall be the chassis
hazards from the recovered materials.
manufacturer's standard or optional
The term "recovered materials" means
engine for the commercial model truck
materials that have been collected or
that meets or exceeds the requirements of
recovered from solid waste and
this specification.
reprocessed to become a source of raw
materials, as opposed to virgin raw
3.4.1.1
DIESEL ENGINE.
materials. None of the above shall be
Unless otherwise specified, the vehicle
interpreted to mean that the use of used
shall be equipped with a liquid cooled,
or rebuilt products is allowed under this
compression ignited, diesel engine,
document. The use of re-refined oil shall
electronically controlled, with not less than
not be prohibited. This does not prohibit
six cylinders. When code YD6 through
vehicle
manufacturers
from
using
YD45 is specified, the optional diesel
performance criteria for acceptable oil.
engine specified shall be provided.
Any re-refined oil products shall meet the
performance criteria of the vehicle and
3.4.1.2
OIL FILTER.
component manufacturers.
A full flow or combination full flow and
bypass oil filter with replaceable element
3.3
PERFORMANCE.
shall be furnished.
3.3.1
MAXIMUM VEHICLE SPEED
3.4.1.3
GOVERNOR.
The maximum vehicle governed speed
An engine governor shall be furnished
shall be not less than 113 km/h (70 mph)
and set and sealed to limit the engine to
or more than 121 km/h (75 mph) for 6x4
the engine manufacturer's recommended
and not less than 96 km/h (60 mph) or
operating speed.
more than 104 km/h (65 mph) for 6x6
vehicles. Under no circumstance shall the
3.4.1.4
COOLING SYSTEM.
vehicle maximum governed speed exceed
The chassis manufacturer's heaviest duty
the speed rating of any of the furnished
cooling system for the model provided
tires.
shall be supplied. The cooling system
shall include a surge tank or a coolant
3.3.2
SERVICE BRAKES.
recovery reservoir of not less than 1.89 L
On all vehicles except Type II tractors, the
(two quart) capacity. On tilt cab models, a
service brakes shall stop the vehicle,
radiator servicing access door shall be
loaded to specified GVW, within the
provided if needed to allow verification of
stopping distance requirements of Federal
the coolant level without tilting the cab.
Motor Carrier Safety Regulation 393.52.
For all Item numbers, the radiator
The service brakes on Type II tractors
furnished shall conform to TMC RP 325.
shall
stop
the
tractor-semitrailer
combination, loaded to specified GCW,
3.4.1.5
COOLANT TEMPERATURE
within the stopping distance requirements
CONTROL.
of
Federal
Motor
Carrier
Safety
Thermostatic control of engine coolant
Regulation 393.52. All service brakes
temperature shall be provided. Control
shall be of the self-adjusting type.
shall include complete thermostatic
control of all coolant flow through the
radiator.
Federal Standard 807M
Page 14 of 65
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