Q. What is to be done where there is no injector?
A. First, care should be taken that the water in the boiler does not fall below the second gauge cock or out of sight in the gauge glass, then stop the engine and bank the fire. When this is done, examine the packing around the plunger to see that it does not leak air, then examine the valves of the pump to ascertain whether they are worn and leak. If this be the case they must be reseated at once. If the valves are all right, work the pump and open the side valve in the delivery pipe to see if the pump draws water. If no water appears, the trouble is probably in the suction pipe.
Q. How can this be remedied?
A. First examine the strainer at end of suction pipe or hose to see if it is stopped up; if it is, clean it out and try the pump. If it works, the difficulty is remedied. If the strainer is clean, examine the pipe or hose from end to end to see that it is perfectly air tight; if not, it should be made so.
Q. If the delivery pipe is choked, how can it be cleaned?
A. Close the globe valve next to boiler, and then examine the check valve to see if it is all right. If it is choked or filled with sediment, take out the valve, clean the shell and re-seat the valve; if the check is all right, disconnect the pipe and clean out if necessary.
Q. What if this pipe and check valve are all right?
A. Let the boiler cool off, then blow off the water, disconnect the pipe between check and boiler, where the difficulty will probably be found, and clean thoroughly.
Q. How can check valve and delivery pipe be choked with water that has already passed through the injector or valves of the pump?