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Title 49: Transportation
Subtitle B: Other Regulations Relating to Transportation (Continued)
CHAPTER II: FEDERAL RAILROAD ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 236: RULES, STANDARDS, AND INSTRUCTIONS GOVERNING THE INSTALLATION, INSPECTION, MAINTENANCE, AND REPAIR OF SIGNAL AND TRAIN CONTROL SYSTEMS, DEVICES, AND APPLIANCES
Subpart C: Interlocking
: Rules and Instructions
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.
(2) Lever moving in arc. Moving lever more than 5 degrees.
(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.
(3) Lever moving in arc. Moving lever more than 5 degrees.
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