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(d)  The following checks shall be made periodically.

                            (i)  The LED lamps bulb shall be seated fixed and fastened properly.

                            (ii)  The signal visibility shall be checked and adjusted periodically.

                            (iii) All  adjusting  nuts  are  properly  tightened.  Maintenance  checks  to  be
                                done as per Annexure: 19-MS1.

               19.9.3  Maintenance of Electric Point Machine


                         (a)  Cleanliness: Machines shall be kept in good condition free from rust, dust
                            and dirt.

                         (b)  Lubrication: All gearing and bearing shall be properly lubricated according
                            to manufacturer's instructions.

                         (c)  Commutator, Brushes & Electrical Connections


                            (i)  Commutator shall be kept clean, smooth and have bright appearance.
                                Commutator  may  be  cleaned  with  chamois  leather.  Under  no
                                circumstances, shall emery paper be used.

                            (ii)  Brushes shall be kept clean and properly bedded on the commutator.
                                Brushes shall have proper pressure and shall be free in brush holders.

                            (iii) All cables connections on terminal, motor terminal etc. shall be checked
                                for intactness.

                            (iv) All  tail  cables  shall  be  checked  for  their  insulation  as  per  periodicity
                                given in Annexure: 15-MS1.

                        (d)  Adjustment of Contacts: Contacts shall be clean, free from pitting and in
                            proper adjustment.

                        (e) Rain water drainage arrangements shall be checked especially prior to and
                            during rainy season.

                        (f)  Fixing Nuts & Screws

                            (i)  Fixing nuts and screws of newly installed point machine often tend to get
                                loose. Care shall be taken to attend to them and readjust where required.
                                To prevent this, check nut with spring washer shall be provided.

                            (ii)  All moving parts including locking Dogs and notches slides, etc. shall
                                be checked for chamfering or undue wear. Where badly worn-out, the
                                relevant parts shall be promptly replaced.

               19.9.4  Testing of Point Machine: Each sectional JE/SSE (signal) shall test the point
                         machine  and  do  adjustments  of  the  machine  by  conducting  obstruction  test
                         as per para: 19.3.6 & Annexure 19-MS2.






                                   Chapter 19: Installation, Testing & Maintenance of Signalling Equipment   Page 407 of 535
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