Nstc Mechanical - Truck

Front 1

Back 1

Wheels:

Made of steel and are produced in a variety of sizes.

Front 2

Back 2

Axle:

Solid steel shaft that holds the wheels to gage and transmits the load from the roller bearings to the wheels.

Front 3

Back 3

Roller Bearing:

Mounted on the end of the axle, sealed bearing units pressed on the axle, and the receive the load from the truck side frame.

Front 4

Back 4

Roller Bearing Adapter:

Designed to transfer the load from the side frame (flat square surface) to the roller bearing (round surface).

Front 5

Back 5

Pedestal Roof Liner:

Removable liner (wear plate) that sits between the adapter and the side frame to prevent wear to either of those components.

Front 6

Back 6

Side Frame:

Interlocks with the bolster and transfers weight from the bolster through the roller bearings to the axle.

Front 7

Back 7

Frame Key:

A small piece of metal installed in the side frame in order to retain the roller bearing in the event of a derailment.

Front 8

Back 8

Truck Bolster:

Transfers the car body load to the truck side frames. Consists of truck side bearings, truck side bearings housings, truck center bowl, and opening for the center pin.

Front 9

Back 9

Bolster Bowl Rim:

A portion at the top of the truck bolster that provides the bowl for the car body center plate to fit into.

Front 10

Back 10

Truck Center Bowl:

Flat circular area in the center of the truck bolster.

Front 11

Back 11

Truck Side Bearing Housing:

A bracket that contains the side bearing and is attached to the truck bolster.

Front 12

Back 12

Truck Side Bearing:

A block, roller or plate, which assists in slowing freight car body rocking when cars move through a curve or on uneven rails.

Front 13

Back 13

Bolster Bowl Liner:

A plastic insert designed to aid in the slewing of the truck around corners.

Front 14

Back 14

Truck Spring:

Serves as a cushion to isolate the car body and its contents from the shocks and vibrations produced by steel wheels riding on steel rails.

Front 15

Back 15

Column Guide Wear Plate:

This plate serves as the replaceable wear surface for the friction castings.

Front 16

Back 16

Brake Beam Wear Liner:

A snap in liner made of steel or elastomer to prevent side frame wear.

Front 17

Back 17

Friction Casting Wear Plate:

A plate used to prevent wear to the bolster, can be bolted or welded in place depending on original construction.

Front 18

Back 18

Friction Casting:

Fits inside the ends of the bolster and helps control the vertical motion of the bolster in the truck.

Front 19

Back 19

Brake Shoe Key:

Small piece of metal about 14" long and 7/8" wide. Secures the brake shoe to the brake beam head.

Front 20

Back 20

Brake Shoe:

Applies pressure against the wheel to slow or stop the car.

Front 21

Back 21

Brake Beam:

Consists of the brake heads, a center strut, a compression member, and a tension member.