1. SLIDING BEARINGS

4. 10 to 15 mm 1 to 3 mm

5. DIFF. SLIDING BEARINGS Common materials being used and their co- efficient of friction are Material  a)Mild steel over mild steel 0.2 to 0.3 b)Mild steel over phosphor bronze 0.15 c)PTFE over stainless steelLess than 0.08 (With Greasing)

6. MAINTENANCE – GREASING Equipments required for greasing of sliding bearings : Jacks (appropriate capacity) 1/2 nos + 1 standby Hard wooden packing (below and above jack) Grease graphite grade 3 conforming to IS 508 Kerosene or released black oil for cleaning 6 mm thick steel scrapers Mortar pan Cotton waste.

11. Greasing – Care to be taken To be done after duly informing P-Way, OHE departments P Way/ OHE departments shall be available Proper train protection must be ensured Girder shall not be lifted excessively Tested equipment/ standby equipment shall be there Girder shall be handled from nominated locations only

12. MAINTENANCE ASPECTS Guide strips and Location strips breakage Holding down bolts corrosion Bed block shaking and cracking – Loose holding down bolts Sinking of bed plates into bed block Crack in wed/ flange near the bearing Corrosion in bearing/ bed plate BACK ADV