STEAM LOCOMOTIVE ENGINEMAN’S. Manual - part 24

Chapter 11: - General Engine Questions and Answers 

 

 

Q. 

What is the distance between the centre of the axle and 
the centre of the eccentric called? 

 
A. 

The eccentricity. 

 
Q. 

What does the eccentricity represent? 

 
A. 

One half of the throw of the eccentric. 

 

 

Chapter 12: - Westinghouse Brake 

 
 

 

CHAPTER 12 

 
 

WESTINGHOUSE BRAKE 

Chapter 12: - Westinghouse Brake 

 

 

CHAPTER 12: - 

WESTINGHOUSE BRAKE 

 
 

 

Page No. 

 

12.1 

Combined Automatic and Non 

 

  Automatic Brake Equipment 

 

123 

12.2 

No. 7 Single Head Pump Governor 

 

124 

12.2.1 

Purpose 

 

124 

12.2.2 

Operation 

 

125 

 

12.3 

Operation of the Single Stage 

 

Westinghouse Pump 

 

126 

12.3.1 

Action of the Steam and Through 

 

One Double Stroke 

 

126 

12.3.2 

Action of the Air End Through 

 

One Double Stroke 

 

127 

 

12.4 

3½ Inch Bulb Triple Valve 

 

128 

12.4.1 

Description 

 

128 

12.4.2 

Charging of the Auxiliary 
Reservoir 

 

129 

12.4.3 

Application of the Brakes 

 

129 

12.4.4 

Release of Brakes 

 

131 

 
12.5 

No 4 Driver’s Brake Valve 

 

132 

12.6 

Operation of the No 4 Driver’s Brake Valve 

 

in the Five Positions of the Handle 

 

132 

12.7 

CM 6 Feed Valve 

 

134 

12.7.1 

Purpose of CM 6 Feed Valve 

 

134 

12.7.2 

Method of Testing the CM 6 Feed 
Valve 

 

135 

12.7.3 

Further Test 

 

136 

 
12.8 

Automatic Slack Adjuster 

 

137 

12.8.1 

Purpose 

 

137 

12.8.2 

Operation 

 

137 

 

12.9 

Passenger Intercommunication 

 

Gear on Carriages 

 

138 

 

Chapter 12: - Westinghouse Brake 

 

 

CHAPTER 12 
 

WESTINGHOUSE BRAKE 

 
  

12.1 

AUTOMATIC AND NON AUTOMATIC BRAKE 
EQUIPMENT 

 
 

The Combined Automatic and Non Automatic Engine and 
Tender Equipment consists of the standard automatic 
arrangement with the addition of a Non Automatic Brake 
Valve and a few simple parts which permit the use of straight 
air operation on the engine and tender brakes without 
interfering with their automatic action when the automatic 
brake valve is used, both being operative at all times. 

 
 

The many and important advantages of an independent 
engine and tender brake are thus obtained, while preserving 
the functions of the automatic brake on these and the train 
brakes. 

 
 

Refer to FIGURE 11 in Annex A.   

 
 

This Figure shows a layout diagram of the combined 
automatic and non-automatic brake as fitted to engines and 
tenders. 

 
 

Refer to FIGURE 12 in Annex A. 

 
 

This Figure shows a plan and sectional view of a non-
automatic brake valve.  The plan view shows the relative 
position of the operating handle. 

 
 

POSITION NO 1 : -  Ordinary running position; also release 

position of the operating handle. 

 

§ 

In Position No. 1, air from the main reservoir 
enter at “G” and flows to the chamber on top of 
the rotary valve.  The non-automatic brake pipe 
is open to the exhaust through points “D” and “C” 
in the valve  seat and cavity “B” in the rotary 
valve.