Page 296 - IRSEM_Main Book

Section 12: Maintenance of Cranks, Compensators, Screws,
Bolts, Nuts, Pins and Cotters

12.12.1 Examination

(a) All cranks and compensators shall be examined regularly and working
parts well oiled.

(b) The position of the compensators shall be carefully checked when a point
or Lockbar does not work properly or where the stroke at the adjusting
crank has to be unduly increased.

12.12.2 Replacement of cracked or broken parts: Cracked or broken parts of
cranks, compensators shall be repaired or renewed.

12.12.3 Cleaning of oil holes: Oil holes shall be cleaned before oil is applied. Oil
shall not be used in excess as it collects dust.
12.12.4 Screws, bolts and nuts: All screws, bolts and nuts shall be in place and
shall be kept tight.

12.12.5 Adjusting Screws: Threads of point adjusting screws shall be oiled regularly
and kept free from dust. Lock nuts of adjusting screws and set screws of
adjusting cranks shall be kept tight.

12.12.6 Pins
(a) All pins of cranks, wheels, etc. shall be in place and kept oiled regularly.
All pins shall be raised slightly where possible, and oil applied underneath
so as to ensure proper distribution.

(b) All badly worn pins shall be replaced by new pins.
(c) Tight pins can often be loosened with kerosene; if this is not possible, pins
shall be driven out and thoroughly cleaned. Pin holes shall never be filed.

12.12.7 Keys and Cotters: All keys and cotters shall be examined regularly. Keys
and cotters shall be in place and properly spread, split ends shall be spread
not less than 10 mm. Keys and cotters shall be of proper size and in good
condition, old nails or pieces of wire shall not be used.

Section 13: Maintenance of Points

12.13.1 Visual inspection of the condition of insulation of insulated rod joints shall be
done during maintenance inspections.

12.13.2 Responsibility of SSE/JE (P-Way) &SSE/JE (Signal):

(a) Maintenance of switches, gauge tie plates and bolts and cotters for pad
locks is the responsibility of the SSE/JE (P-Way). In addition, all non-
interlocked switches, leading and following stretcher bars connecting
rods, self reversing levers, hand points, spring loaded points are also
maintained by him. Connections to switches other than those specified
above such as facing point locks and bars, detectors, point and trap
indicators are maintained by the SSE/JE (Signal).

Chapter 12: Installation, Testing & Maintenance of Mechanical Signalling Equipment Page 250 of 535