26L Air Brake System

Front 1

26F Quick Release

Back 1

Allows the actuating release of an automatic brake application of the locomotive brake cylinders in response to actuating operation of the independent brake valve or the dynamic brake interlock magnet valve.

Front 2

P2A Brake Application Valve

Back 2

Allows a safe penalty brake pipe reduction in response to:

- Safety Control foot pedal

- Crew alerter

- Cab signal penalty

- Positive Train Control penalty

Front 3

SA26 Independent Brake Valve

Back 3

Develops signal pressures to control the application and release of the locomotive brake cylinders independent of the automatic brake system.

Front 4

26F Control Valve

Back 4

Develops signal pressures to control the application and release locomotive brake cylinders automatically in response to the brake pipe pressure.

Front 5

26C Automatic Brake Valve

Back 5

Develops, controls, and pressure maintains brake pipe pressure in reference to equalizing reservoir volume.

Front 6

H-5 Type Relay Air Valve

Back 6

Serves as an air relay in which a signal pressure pilots a set of normally open or normally closed passages for the control of air flowing to various components. This valve is regularly used for PCS time delay and for actuating 30A-CDW equipment.

Front 7

C-140 Dead Engine Feature

Back 7

Allows for main reservoir charging from brake pipe air pressure on a locomotive moving dead-in-train.

Front 8

SA26 Independent Brake Valve

Back 8

Develops signal pressures to control the application and release of the locomotive brake cylinders independent of the automatic brake system.

Front 9

J Type Brake Cylinder Relay

Back 9

Operates in response to an air signal to allow main reservoir pressure to flow to the brake cylinders in proportion to the controlling signal. Signal sources are the SA26 independent and the 26F Service Control valve.

Front 10

A-1 Charging Cutoff Pilot Valve

Back 10

Operates in response to an emergency brake pipe reduction. Sends a signal to:

- Cut-off brake pipe charging at the 26C Automatic Brake Valve

- Allow timed emergency sand operations

- Cut off loading of the locomotive through the PCS

Front 11

#8 Vent Valve

Back 11

Responds to a rapid reduction in brake pipe pressure to further vent the brake pipe locally to assist in the propagation of an emergency application.

Front 12

1 Pipe

Back 12

Brake Pipe

Front 13

5 Pipe

Back 13

Equalizing Reservoir Control Pipe

Front 14

13 Pipe

Back 14

Actuating Pipe

Front 15

15 Pipe

Back 15

Equalizing Reservoir Charging Pipe

Front 16

16 Pipe

Back 16

Brake Cylinder Control

Front 17

20 Pipe

Back 17

Independent Application and Release Pipe

Front 18

26 Pipe

Back 18

Suppression Pipe

Front 19

30 Pipe

Back 19

Main Reservoir Pipe

Front 20

53 Pipe

Back 20

Brake Pipe Cut-off Pipe

Front 21

35 Pipe

Back 21

Power Dynamic Knockout

Front 22

25 Pipe

Back 22

Power Knockout Penalty