236.339—Mechanical locking, maintenance requirements.
Locking and connections shall be maintained so that, when a lever or latch is mechanically locked the following will be prevented:
(a) Mechanical machine—
(1) Latch-operated locking.
Raising lever latch block so that bottom thereof is within three-eighths inch of top of quadrant.
(2) Lever-operated locking.
Moving lever latch block more than three-eighths inch on top of quadrant.
(b) Electromechanical machine—
(1) Lever moving in horizontal plant.
Moving lever more than five-sixteenths inch when in normal position or more than nine-sixteenths inch when in reverse position.
(c) Power machine—
(1) Latch-operated locking.
Raising lever latch block to that bottom thereof is within seven thirty-seconds inch of top of quadrant.
(2) Lever moving in horizontal plane.
Moving lever more than five-sixteenths inch when in normal position or more than nine-sixteenths inch when in reverse position.