Page 295 - IRSEM_Main Book

12.9.3 Instructions for SSE/JE(Signal):

(a) The SSE/JE (Signal) shall ensure that the interlocking frames are kept
clean and lubricated.

(b) Locking of all interlocking frames shall be tested as per instructions
contained in para 12.26.7.

(c) During the testing of interlocking frames, careful note shall be taken of
slack locking and if the slack locking exceeds the limits laid down in Para
no's.12.1.3(i), overhauling shall be taken up forthwith.

(d) Locking of all interlocking frames shall be overhauled at least once every
three years or earlier, if necessary, as per instructions laid down in para
12.25.5.

Section 10: Maintenance of Lead outs (Rodding)

12.10.1 All lead outs shall be examined regularly and kept clean and well oiled.

12.10.2 All connections, especially the down rods, shall be examined to detect cracks
and worn out threads. The whole of the apparatus shall be kept rigidly and
solidly connected.

Section 11: Maintenance of Point Rodding and Fittings

12.11.1 Examination

(a) All runs of rodding shall be regularly examined to see that all joints make
good and solid connections.

(b) All couplings, adjusting screws and adjustable joints shall be examined for
looseness, worn out threads or slack nuts.

(c) Rodding shall be examined for detecting weak places due to rust,
corrosion or other causes.

12.11.2 Alignment: The rods shall be kept in true alignment and free from all
obstructions.

12.11.3 Rollers: Rollers shall fit properly in the standards and move freely. Broken
roller standards, missing rollers and pins shall be replaced.

12.11.4 Roller Foundations: Roller foundations shall be realigned if found to have
shifted or sunk and shall be renewed when necessary.

12.11.5 Points, Locks and Bars shall not be operated by wire but by rodding or by
electrical means.

12.11.6 Operation of Facing Point lock: The operation of the facing point lock shall
depend on the correct operation of the Lockbar. This Lockbar shall form a
part of the transmission and be in series with it.

Chapter 12: Installation, Testing & Maintenance of Mechanical Signalling Equipment Page 249 of 535