STEAM LOCOMOTIVE ENGINEMAN’S. Manual - part 16

Chapter 8: - Lubricators 

 

 

  

Air should then find its way, through the bottom 
port in the central passage, into the space 
between the outside of the stem and sleeve, and 
thus escape from this direction.   

 
 

Air bubbles will rise through the oil, thus 
indicating that the lubricator is functioning 
correctly.  If the passages are not free they must 
be cleared or booked for attention. 

 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Chapter 9: - Engine Failures and Defects 

 
 

 

CHAPTER 9 

 
 

ENGINE FAILURES AND 

DEFECTS 

 

 

Chapter 9: - Engine Failures and Defects 

 

 

CHAPTER 9: - 

ENGINE FAILURES AND DEFECTS 

 
 

 

Page No. 

 

9.1 

Testing ‘D’ slide Valves and Pistons 

 

83 

9.2 

Testing for Knocks and Pounds 

 

84 

9.3 

Testing for Loose Piston heads 

 

85 

9.4 

What to do in Cases of Emergency 

 

85 

9.5 

Haulage of Disabled Locomotives 

 

85 

9.6 

Broken Tender Draw Hook 

 

86 

9.7 

Bent Cowcatcher 

 

86 

9.8 

Broken Gauge Glass 

 

86 

9.9 

Hot Coupling Rod Bushes 

 

87 

9.10 

Serious Knocking 

 

87 

9.11 

Broken Motion or Valve Gear, Springs etc 

 

88 

Chapter 9: - Engine Failures and Defects 

 

 

CHAPTER 9 
 

ENGINE FAILURES AND DEFECTS 

 
 

9.1 

TESTING “D” SLIDE VALVES AND PISTONS 

 
 

The “D” slide valve is fitted on the engines using saturated 
steam, and is the outside admission type. 

 
 

The engine crank is set on the top or bottom quarter.  In 
either of these positions the slide valve will be central, 
covering both steam ports, if the reversing lever is in the 
central or neutral position. 

 
 

With the crank on the top quarter, the slide valve moves in 
the same direction as the lever.  Therefore, if the reversing 
lever is moved forward the valve moves forward, the back 
steam port is opened and the front steam port is in 
communication with the exhaust cavity of the valve. 

 
 

With the crank on the bottom quarter, the slide valve moves 
in the opposite direction to the lever.  Therefore, when the 
reversing lever is moved forward the valve moves back, 
opening the front steam port, and the back steam port 
communicates with the exhaust cavity of the valve. 

 
 

The engine should be set with the rank on the bottom 
quarter for preference, as this is more convenient for 
uncoupling purposes if such is required. 

 
 

It is first ascertained that the front and back cylinder cock 
passages are open and clear.  The drain pipe from the 
steam chest to the back cylinder cock, which pipe is 
attached to the cylinder cock casting, is uncoupled and 
pushed aside, or blanked. 

 
 

The Westinghouse brake and hand brake are applied and 
the reversing lever placed in the central positions.  With the 
reversing lever central, the combination lever should be in a 
vertical position with Walschaert’s valve gear, and the 
outside rocker arm should be vertical with Stephenson link 
motion.