One-person cab usually located beside engine.
Moldings that finish the edges of a vinyl roof cover when it does not extend to the windshield, backlight and door openings.
The brake apparatus used to manually apply the brakes on a car or locomotive.
Opening in the disc area of a wheel for the purpose of valve stem access to inside dual tire and chain application.
Hard Brake Count
The number of times a rapid deceleration of the vehicle had occurred on a trip (default hard brake threshold is 7mph/s Detroit, 9 MPH Cummins, default 0 CAT, Mack owner selectable). ( Detroit )
Hard Brake Limit
ProDriver setup parameter for the deceleration threshold to trigger a hard brake incident. ( Detroit )
Latest hard braking incidents recorded up to five Incidents total ( Detroit )
The parts of the interior which are not soft trim; I.e., ornaments, garnish moldings, script, appliques, etc.
Terminology used to describe a rear axle and wheel support without springs or shock absorbers.
A term applied to any fixed roof with retracting window glass and no exposed "B" or middle pillar.
The high frequency (25-100 Hz) vibrations of the structure and/or components that are perceived tactually and/or audibly.
Body styling where the backlight is included in the deck lid or luggage compartment door.
Shading consisting of closely spaced parallel lines in a drawing, vertically, horizontally, or diagonally.
See situation hazard.
Beginning or forward portion of any train.
Brake man responsible for work done in connection with the forward section of the train and, when in transit, is stationed in the locomotive.
The structural member above the windshield at the juncture with the forward edge of the roof panel.
The angle between the trace on the X-Y plane of the vehicle x-axis and the X-axis of the earth-fixed axis system.
The ceiling inside a vehicle, usually vinyl but sometimes cloth, or one piece processed panel board.
Radiator-type device for cooling self-contained fluid such as oil or water.
A protective guard to prevent air cushion material burn-through.
The process of heating and cooling a metal throughout a temperature range for the purpose of obtaining certain desired mechanical or physical properties.
A device for melting snow at switches by means of steam, an electric current, gas jets or oil.
An insulted box car equipped with heating apparatus for the protection of perishables.
Includes 1) single unit truck with GVW greater than 26,000 pounds., 2)tractor trailer combinations, 3) trucks with cargo trailers and 4) truck tractor pulling no trailer.
The point directly beneath the heel of the right foot of the manikin on the normal metal floor surface.
The auxiliary engine on a double-header.
Additional spring device permitting great load on axle.
Metal joint formed by wrapping the outer metal sheet of a door, hood or decklid around the inner panel.
Unit of frequency equal to one cycle per second.
A truck or trailer body with above-average cubic volume.
(slang) Main line or high track of a system of main line tracks.
The outer or elevated rail of a curved track.
A motorcycle up set condition that involves an extreme rolling and overturning motion of the motorcycle, where the upper part of the motorcycle leans laterally towards the direction of travel.
HIGH SIDE GONDOLA CAR
A gondola car with sides and ends over 36 inches high.
(slang) A signal given to proceed at maximum authorized speed.
The highest Engine Speed reached on a Trip. ( Detroit )
The highest Vehicle Speed reached during a Trip. ( Detroit )
Theoretically a path of light described by the intersection of curved surface and a line or plane becoming tangent to that surface at a constant angle usually 45 degrees.
The entire width between the boundary line of every way publicly maintained when any part thereof is open to the use of the public for the purpose of vehicular travel; "a street; a publicly maintained traffic-way.
An after market device mounted to the engine guards or frame of a motorcycle for use as an additional foot rest by the operator.
HIGHWAY USER FEE OR TAX
A charge levied on persons or organizations based on the use of public roads. Funds collected are usually applied toward highway construction, reconstruction and maintenance. Examples include vehicle registration fees, fuel taxes, and weight-distance taxes.
HINGE LIMIT LINES
The limits within which styling may vary body surface without requiring new hinges or door hardware.
See evading responsibilities.
A trailer-to-dolly hitch mechanism where all slack is taken up by admission of air to a suitable air chamber equipped mechanism.
Hazardous Material Transportation Act
An engraved metal cavity, or female mold, from which pressings are made.
The cut from solid stock.
HOGGER or HOG HEAD
(slang) Locomotive engineer.
A device to hold the door in an open position. Present production used an arrangement of spring and cam on the door hinges.
A track on which cars are held awaiting disposition.
(slang) Passing track enabling one train to pass another.
Human volunteer tests of the ACRS on the daisy sled at Holloman Air Force Base, New Mexico.
A location where a car is on the tracks of its owner.
A car on the tracks of its owner.
A junction with the home road.
The owning road of a railroad car.
The return route of a foreign empty car to the owning road.
A fixed signal at the entrance to an interlocking block to govern trains or engines entering and using that block.
(Bonnet) A hinged panel providing access to the engine compartment.
(slang) A crane used in wreck train service. Also called "Big Hook" or "Wrecker".
The vertical oscillatory motion of a wheel between the road surface and the sprung mass.
An open top car or trailer with one or more pockets or hoppers opening on the under side of the unit to permit quick unloading of bulk commodities.
An upward change of direction of a surface or line.
HORIZONTAL BODY ZERO LINE
Established in the initial design stages as the base reference line for the horizontal lines of the body grid.
An air or electric powered device for producing a sound for signaling.
A measure of mechanical power or the rate at which work is done. One horsepower equals 33,000 ft/lbs. Of work per minute. It is the power required to raise 33,000 pounds one foot in one minute.
HORSEPOWER, BRAKE (bhp)
Maximum power available from an engine as measured by a dynamometer.
Power required to drive the engine as equipped during power test.
The brake hp determined under conditions defined by dynamometer test of the stripped engine, that it, the brake horsepower of the engine with only those accessories and attachments necessary to the functioning of the engine during test.
Power developed in the cylinders and equal to the sum of the brake horsepower and the friction horsepower.
The brake horsepower delivered to the clutch, or its equivalent, with all accessories and attachments functioning (including exhaust pipe, muffler and tail pipe) which are standard or regular equipment on the engine as installed in the particular chassis.
HORSEPOWER, SAE (NACC)
Power rating for licensing purposes where: hp = (B2 x N)/2.5. B = Bore of engine N = No. of cylinders
A fireman who operates light engines in designated engine house territory and works under the direction of the engine house foreman.
A simplified throttle provided to move the "B" unit of a Diesel Locomotive not equipped with a regular engineer's control.
An over heated journal caused by excessive friction between bearing and journal, lack of lubricant or foreign matter.
HOT BOX DETECTOR
A wayside infer red sensing instrument for determining journal temperatures.
The development of a pattern blank by trial error cutting of blanks, using the form and flange dies in conjunction with the checking fixture. This method is more accurate than a cold development.
A ductile tungsten lamp filament, stretched, uncoiled, bowed or tangled. Caused by the inertial force of a collision
Rear axle drive where driving force, thrust and torque, are transmitted from the rear axle to the frame through the rear springs.
The pivot center of "Oscar's" (manikin) torso and thighs.
"H" TO HEEL
Distance in inches from "H" point to accelerator heel point.
A bright, decorative, circular metal disc covering the hub of the wheel, lug nuts, etc. (See disc and wheelcover)
HUB MOUNT WHEEL
Wheels that are designed to center on the hub at the bore of the wheel. These wheels generally have straight-through bolt holes, since the bolt holes only supply clearance for the stud. Hub mount wheels are used with two-piece flange nuts.
An incline in a railroad yard over which cars are uncoupled and allowed to roll free into a classification yard.
Wire carrier read through.
A boxcar of approximately 85 ft. Length and 10,000 cu ft. Capacity designed for hauling automobile body stampings and other low-density freight.
HYDRAULIC BRAKE SYSTEM
A hydraulic brake system is a system that uses hydraulic fluid as a medium for transmitting force from a service brake control to the service brake, and that may incorporate a brake power assist unit, or a brake power unit.
An instrument used to test the specific gravity of battery fluid to determine the charge.
Hydroplaning occurs when tires rolling on the wet surface of road reach speed where the tire becomes completely detached from the road and skis along on a thin film of water.
Gear with diagonally positioned teeth.
The hypotenuse of a right triangle is the longest, or diagonal side of the triangle
Caterpillar User's Manual