Flat Tyre

  1. 1

    Flat tyre is detected by the unusual/hammering sound of vehicles.

  2. 2

    It is caused due to not correctly keeping empty/load handle in position, not releasing vehicles properly and skidding of wheels.

  3. 3

    When train is run with flat tyre, it causes weld failures and rail fractures.

  4. 4

    LP and guard while on run notice flat tyre in block section:

    • Observe SR 30 kmph and clear block section.

    • On arrival at station, intimate SM.

  5. 5

    Station staff either through the crew of train or while 'exchange of all right signals' become aware of flat tyre they have to:

    • Give memo to TXR staff if available to examine the vehicle.

    • TXR staff after examining, if found within permissible limits (i.e. 60 mm for wagons and 50 mm for coaches), has to certify the vehicle to run with normal speed.

    • If TXR staff find the flatness beyond the permissible limits, advise SM to detach the vehicle at that station.

    • If TXR staff not available at that station, with the consultation of SCOR, the vehicle has to be detached at that station.

    • The detached vehicle sent to next TXR point by other train with a speed restriction of 30 kmph.

  6. 6

    Control office getting information about flat tyre:

    • Arrange to stop at next station.

    • Advise DyCHC and CHC.

    • If TXR staff is available at the station, arrange to examine and certify by TXR to either detach or permit the vehicle.

    • If TXR staff not available, detach that vehicle after consultation with LP, guard, and SM.

    • Detached vehicle may be moved to next TXR examination point by another light engine or by any train with SR 30 kmph.

    • DyCHC with Engg. Control asks PWI to inspect rear block section by light engine/tower car with SR 30 kmph or by motor/push trolley.

  7. 7

    Engineering staff inspects the rear block section and certify.

    • PWI shall impose caution order in the section till USFD test is done.

      • SR 50 kmph for passenger and empty goods trains.

      • Loaded goods train shall not be permitted.

    • After USFD test is done in that section for the next 24 hours:

      • Speed for passenger/empty goods train – 75 kmph.

      • Speed for loaded goods – 50 kmph.

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