System Timetable No. 24
Arizona Div. Profile Charts Table of Contents B. Speed Restrictions—Locomotives

SYSTEM SPECIAL INSTRUCTIONS

A.   TRACKSIDE DETECTORS

  1. The type and location of all trackside detectors will be listed on each individual subdivision.


Symbol


Type of Detector

E1
E2
E3
E4
E5
F1
F2
H1
H2
H3
H4
H5
H6

Hot Box Talker
Dragging Equipment Talker
Hot Wheel Talker
High/Wide Load Talker
Loose Wheel Talker
Dragging Equipment Talker
High/Wide Load Talker
Dragging Equipment Flashing Purple Light/Talker
Hot Box GRS Type
Hot Box Servo-Type
Shifted Load
High Water
Wheel Checker Flashing Purple Light/Talker


  1. The following detector instructions apply:
    1. Train speed of at least 10 MPH must be maintained while train is moving over hot box detector when practicable.
    2. Do not stop over hot box detector when practicable.
    3. Avoid braking, if practicable, while approaching or passing hot box detector. Excessive braking may cause false indication.
    4. When trackside detector is activated, train must be stopped and required inspection made. If defect is located and it cannot be corrected, car must be set out at the first available track provided it is safe to be moved.
    5. If train stops, or if speed of train is below 10 MPH while passing a hot box detector and train subsequently receives a hot box indication, all bearings on both sides of entire train must be inspected. An additional inspection is not required when train clears detector location, regardless of message received.
    6. A train which receives defect message and stops to inspect for indicated defect prior to clearing detector does not have to perform a second inspection if leaving message is a repeat of the original message.
    7. When inspecting for hot bearings, each roller bearing required to be inspected must be checked by use of a tempilstik, if available, on the bearing cup (exposed underside of bearing).
    8. If tempilstik melts, car must be set out. If a tempilstik is not available and no obvious sign of overheating is present on axle indicated, cautiously place bare hand on truck side frame working hand toward roller bearing end cap, keeping in mind that any part of this equipment may be extremely hot.

      If bare hand cannot be held on side frame or roller bearing for a few seconds, car must be set out.

    9. Train dispatcher and connecting crew, if any, must be notified of a car that experiences a false hot box detector actuation.
    10. When a car experiences two false hot box detector actuations, car must be set out at first available track. Speed must not exceed 30 MPH to point where car is set out.
    11. When car suspected of having hot bearing is set out, a pink fluorescent tag is to be attached as close as possible to the hot bearing. A pink tag should be contained in crew pack. Journal size of hot bearing must be reported to the train dispatcher.

  2. Type E & F: Radio Readout (Talker) Detector:
  3. When movement over a Type E or F detector begins, the system should transmit "J.G.L. detector milepost 121.3. Detector working."

    Type E detectors report the axle count location of a defect from the front of train.

    Type F detectors do not provide axle count.

    If defect is detected during movement, the system will immediately transmit a defect message.

    Type E Example: "J.G.L. detector milepost 121.3. Stop your train! Stop your train! First hot box axle 210 on left side."

    Type F Example: "J.G.L. detector milepost 121.3. Stop your train! Stop your train! Dragging equipment."

    When train has cleared the detector, the defect message will be transmitted an additional two times.

    When defect message is received by train crew, the train must be stopped and inspected for indicated defect(s).

    If defect is not located at the reported axle location, crew must inspect 20 axles ahead and 20 axles behind the axle indicated on both sides. If axle location is not provided, crew must inspect both sides of entire train for the indicated defect.

    If defect messages are received during passage of train over the detector site and the end of train message combines defect reports with the phrase "Detector Malfunction," train must be stopped and entire train must be inspected on both sides for the type(s) of defect(s) normally detected by that detector.

    Example: "J.G.L. detector milepost 121.3. Stop your train! Stop your train! First hot box axle 210 on left side, detector malfunction."

    When train has passed the detector with no defects found, the system will transmit "no defect" message.

    Example: "J.G.L. detector milepost 121.3. No defects, no defects."

    When detector is not functioning properly, it will transmit "J.G.L. detector milepost 121.3. Detector malfunction."

    When a "No Power" message is received the train dispatcher must be notified.

    When a Type E trackside detector alarm is activated on dispatcher's CTC control machine, the train dispatcher must immediately contact the train involved instructing them to stop and inspect their train due to detector being activated.

  4. Loose Wheel Detecton: When loose wheel detector is actuated, inspect for lateral movement of wheel on axle. This can be detected by inspecting backside of wheel for scoring on axle. If defect is not found on indicated axle, inspect an additional 20 axles ahead and 20 axles behind indicated axle on both sides.

  5. Decision Tables: The following charts outline aspects and specific conditions of Type E & F trackside detectors. Across the top of each chart are listed the aspects and specific conditions. Each of these are independent of one another. To determine the required action for each, follow vertically down the chart below each column to each box that has an entry. These entries are the symbols for the types of detectors requiring action for that specific aspect or condition. To determine the required action, follow the entry line to the right.


ASPECTS AND SPECIFIC CONDITIONS REQUIRED
ACTION
"No Power" message received No verbal message received Advised detector is out of service Advised by train dispatcher detector has been activated
  E-1, E-2,
E-3, E-5,
F-1
E-1, E-2,
E-3, E-5,
F-1
  No action required except if train passes two consecutive inoperable detectors and has not received a visual inspection on both sides, then train must be stopped and inspection made.
      E-1, E-2,
E-3, E-4,
E-5
Stop and inspect for the type of defect normally detected by that detector.
E-1, E-2,
E-3, E-4,
E-5
E-1, E-2,
E-3, E-4,
E-5, F-1,
F-2
    Report condition to the train dispatcher.
    E-4, F-2   Freight train must be stopped short of protected structure and train inspected for high/wide load. Inspection is required only in direction of approach to structure.


ASPECTS AND SPECIFIC CONDITIONS REQUIRED
ACTION
Verbal defect message received Verbal message received but not under-stood Detector malfunction message received w/o a defect message Detector malfunction message received with a defect message "Detector Working" message is not received
E-1, E-2,
E-3, E-4,
E-5, F-1,
F-2
        Stop and inspect for indicated defect.
    E-1, E-2,
E-3, E-5,
F-1
    No action required except if train passes two consecutive inoperable detectors and has not received a visual inspection on both sides, then train must be stopped and inspection made.
  E-1, E-2,
E-3, E-4,
E-5, F-1,
F-2
  E-1, E-2,
E-3, E-4,
E-5, F-1,
F-2
  Stop and inspect for the type of defect normally detected by that detector.
    E-1, E-2,
E-3, E-4,
E-5, F-1,
F-2
E-1, E-2,
E-3, E-4,
E-5, F-1,
F-2
E-4, F-2 Report condition to the train dispatcher.
    E-4, F-2   E-4, F-2 Freight train must be stopped short of protected structure and train inspected for high/wide load unless verbal "no defect" message is received. Inspection is required only in direction of approach to structure.


  1. Type H-1: Dragging Equipment Detector, Flashing Purple Light/Talker:
  2. Dragging Equipment Detectors will be identified in the field by reflectorized "D" signs; employees must familiarize themselves with their location.

    Normal indication of Dragging Equipment Detectors is dark and no radio alert is transmitted.

    When the purple indication and/or radio alert is activated, train must be stopped immediately and inspection made. It must be known that the equipment and track are in safe condition before proceeding. When practicable, detector indication must be deactivated by opening circuit switch located on side of adjacent signal case.

    If a detector is illuminated and/or radio alert is activated in advance of a train, unless otherwise instructed by train dispatcher, train must be stopped and circuit switch opened. Movement beyond the detector signal must be made prepared to stop short of obstruction for one-half mile watching carefully for evidence of track damage from dragging or derailed equipment.

    Report must be made to the train dispatcher by the first available means of communication.

  3. Type H-2, H-3: Hot Box Detector, Remote Readout:
  4. If hot box is detected during the time train is passing over detector, graph at train dispatchers office will indicate car and location in train. employees reading graphs must notify crew of train of suspected hot journal and location of car or axle in train. Train must be stopped at once and journal inspected. If journal is of normal temperature, inspection must be made of 20 axles ahead and 20 axles behind car or axle indicated on both sides of train.

  5. Type H-4: Shifted Load Detector:
  6. Shifted load detectors will be identified in the field by reflectorized "SL" signs. Detectors are normally dark but will display a purple indication and/or transmit an intermittent 24-second radio alert when activated.

    If the purple indication and/or radio alert is activated, train must be stopped immediately and inspection made. It must be known that loads have not shifted and equipment and track are in safe condition before proceeding. When practicable, detector must be deactivated by opening circuit switch located on side of adjacent signal case.

    If a detector is illuminated and/or radio alert is transmitted in advance of a train, unless otherwise instructed by train dispatcher, train must be stopped and circuit switch opened. Movement beyond shifted load detector must be made prepared to stop short of obstruction for three miles, watching carefully for damage to bridges, tunnels or other close clearance structures.

    Report must be made to train dispatcher by first available means of communication.

  7. Type H-5: High Water Detector:
  8. High Water Detectors will be identified in the field by reflectorized "HW" signs. Detectors activated by high water are equipped with a purple strobe light indication and radio voice alert. When activated, detectors will set adjacent block signals to display red aspect, purple strobe light will flash, and radio alert message will be transmitted once every minute until device is reset.

    When such signals are activated, train will comply with Rule 241 or Rule 242. Bridges or other structures protected by high water detectors must not be passed until a thorough inspection has been made and it is known that structures are safe for movement of train.

  9. Type H-6: Wheel Checker Detector, Flashing Purple Light/Talker:
  10. When the purple indication and/or radio alert is activated, train must be stopped immediately and inspection made by crew member or Mechanical Dept. employee for defect on indicated axle. Mechanical Dept. employee stationed at remote readout will determine axle location.


End of Section A



Arizona Div. Profile Charts Table of Contents B. Speed Restrictions—Locomotives