A. Place conveyor reversing lever 12 in center position.
22. Q. How would you reverse right or left elevator screw?
A. Raise elevator pawl shifter 26 on top of the vertical shaft to upper position.
23. Q. How would you stop right or left elevator screw?
A. Raise elevator pawl shifter 26 on top of the elevator to middle position.
24. Q. How would you locate clogs in case the stoker stalls?
A. First, shut off pressure to stoker engine cylinder by closing valve 6. Second, move operating valve lever 10 to its lowest position. Third, place tender conveyor reverse lever 12 in center. Fourth, place right elevator pawl shifter 26 in neutral position. Fifth, raise operating valve lever 10 to center position. Sixth, open valve 6 sufficiently to run left elevator to ascertain if it operates freely. Cut in right elevator by lowering pawl shifter 26, and if stoker stops, the obstruction is in the right elevator. If it continues to operate, then the obstruction is in the tank conveyor.
25. Q. How would you remove clogs?
A. Clogs in upright elevators usually occur at the bottom. Raise the door in the engine deck and remove the obstruction if in the elevator, reverse the elevator screw forcing the obstruction back down in transfer hopper. It may be a small mine spike lodged above this point, and by removing the nut at top of elevator casing and removing the door the obstruction can be easily removed.
26. Q. If the clog is in the tank conveyor, how would it be removed?