32 ROUGH-AND-TUMBLE ENGINEERING 



clcnly, examine the tank and ascertain if you have any 

 T. If you have sufficient water, it may he that there 

 is air in the pump chamber, and the only way that it can 

 get in is through the stuffing box around the plunger, if 

 the pipes are all tight. Give this stuffing nut a turn, and 

 if the pump starts off all right, you have found the trou- 

 ble, and it would be well to re-pack the pump the first 

 chance you get. 



If the trouble is not in the stuffing box, go to the tank 

 and see if there is anything over the screen or strainer 

 at the end of the hose. If there is not, take hold of the 

 hose and you can tell if there is any suction. Then 

 ascertain if the water flows in and then out of the hose 

 again. You can tell this by holding your hand loosely 

 over the end of the hose. If you find that it draws the 

 water in and then forces it out again, the trouble is with 

 the first check valve. There is something under it which 

 prevents its shutting down. If, however, you find that 

 there is no suction at the end of the hose examine the 

 second check. If there should be something tinder it, it 

 would prevent the pump from working, because when the 

 plunger starts back, if the check fails to hold, the water 

 will flow back and fill the pump barrel again and there 

 will be no suction. 



The trouble may, however, be in the hot water check, 

 and it can always be told whether it is in the second check 



