THE FEED WATER 25 



the starter-pins are free and have not become loosened or 

 stuck by tight packing. Pull them out as far as they will 

 go. 2. The steam pipe may be obstructed so that the 

 pump does not receive a sufficient supply of steam. 3. 

 Remove the cylinder heads and see that the piston moves 

 freely, and that the nut on the water end of the piston rod 

 is properly tightened. This nut may have worked partly 



FIG. 5. SECTIONAL VIEW OF MARSH PUMP. 



or entirely off, thus preventing a complete stroke. 4. Re- 

 move the steam chest and see that the small "trip" holes 

 near the steam chest and the corresponding holes in the 

 steam cylinder are open. If the pump has been idle for a 



