Page 304 - IRSEM_Main Book

12.21.6 Trimming of Trees Obstructing Visibility: Where trees interfere with the Loco
Pilot's or cabin man's sighting of signals, the SSE/JE (Signal) shall arrange with
the SSE/JE (Works) for Trimming of tree branches or cutting of trees within the
Railway boundary. If the trees are in private land, the Sr.DSTE or DSTE or
ADSTE incharge of the section shall be informed so that he may arrange through
Sr.DEN or DEN or ADEN for the removal or cutting of the trees.

12.21.7 Artificial backgrounds

(a) Signals may be provided with an artificial background painted white, if
found necessary to improve the sighting or when the background is a
bridge or structure, such portion as necessary to form a background, may
be painted white or be white washed.

(b) Arms provided with an artificial background shall project 150 mm beyond or be
provided with a tell tale arm so that it can be seen by the Station Master.

12.21.8 Posts: Signal posts shall be kept plumb. Signal post guys, where provided
shall be kept tight and in good repair.

12.21.9 Deck Boards: Deck boards on bracket posts and gantries shall be inspected to
detect decayed or loose boards. Missing or defective boards shall be replaced.

12.21.10 Provision of Signal Dubbers and Kerosene: Whenever kerosene lit signals
are provided, the signal dubbers and kerosene shall be provided by Traffic staff.

12.21.11 Cleaning of Signal Glasses and Lamp Lenses: The Traffic staff are
responsible for wiping and cleaning of signal glasses, roundels, and lenses of
kerosene lit signals. Roundels of electrically lit signals shall be cleaned by
signal staff.

Section 22: Maintenance of Point, Trap and Shunting
Permitted Indicators

12.22.1 Type, Provision, Placing and Indication

(a) Point, Trap and Shunting Permitted Indicators shall be provided in
accordance with the approved plans.

(b) Type, Provision, Placing and Indication of these indicators are covered in
detail in Chapter 7 of SEM.

Section 23: Maintenance Schedule

12.23.1 The maintenance schedule for various items of 'Mechanical signalling
equipment shall be as in Annexure: 12-MS1. At stations having dense traffic
and high speeds, the Railways may prescribe more frequent inspections, if
considered necessary.

Chapter 12: Installation, Testing & Maintenance of Mechanical Signalling Equipment Page 258 of 535