Page 301 - IRSEM_Main Book

(b) There shall be no binding in any part of transmissions and all wires and
ropes shall lie properly in the grooves of pulleys and wheels respectively.
All pulleys shall be parallel to the wire run.

(c) All transmissions shall be kept taut; there shall be no appreciable sag
between pulleys.

(d) Care shall be taken to see that wires and ropes do not scrape against
platform and other objects as rails, chairs, covers and lids.

(e) All wheels and mechanisms shall be thoroughly lubricated with a grease
gun and made to work easily. All cam paths shall be kept well lubricated
with grease.

12.20.2 Maintenance of Compensators: Compensators shall be maintained as per the
instructions for 'Installation and Maintenance of Double Wire Compensators'.
Some of the salient features are-

(a) All moving parts shall be lubricated every fortnight with axle oil medium to
IS:1628 and where nipples are provided Grease to IS:507 shall be used with a
grease gun. The compensator wheels grooves and the wire rope lengths
working in them shall be lubricated with graphited grease grade I to IS:508.

(b) It shall be checked that all bolts are properly tightened and all split pins
and nuts are in proper positions.

(c) All broken parts shall be replaced immediately.

(d) It shall be checked that both the weight levers move independently.
Weight levers shall not be bound together either by wire or by chain.

(e) It shall be maintained that locking pawl is in a position normally free from
the ratchet rod but during lever operation they shall be engaged properly
with the ratchet rod teeth.

(f) In case of hard working of Double Wire transmission during cold weather, it
shall be checked by night that weight levers are not binding against stop pin at
the bottom of the ratchet rod and adjustments made where required.

Chapter 12: Installation, Testing & Maintenance of Mechanical Signalling Equipment Page 255 of 535