Coach care centre new delhi

Coach care centre new delhi

1. RAILWAY MAINTENANCE AT SUBMITTED BY : SATYAM SINGH B.Tech [ME-D] 4 th Year 110106247 11SETME252

2. CLASSIFICATION OF COACHING MAINTENANCE DEPOTS Serial No. Depot No. of based Coaches 1 Minor 50 – 100 2 Medium 100 – 250 3 Major Above 250

3. MAINTENANCE SCHEDULE and category Washing Line Trip Schedule : After every trip by primary maintenance depot. Sick Line 2. Schedule A : Monthly (1 month + 7 days) Schedule B : Quarterly (3 months + 15 days) Schedule C : After 180 days or 6 Months 5. IOH : Every 9 months 6. POH : Every 18 months

4. Works carried out in Washing Line Inspection Cleaning & washing Brake testing Primary Maintenance Secondary Maintenance Watering Loading of linen Maintenance of AC & electrical circuits of coaches

5. Brake testing in Washing Line Brake testing is carried by using RTR (rack test rig). Rack testing rig is capable of testing full train (up to 24 coaches) at a time.  SECONDARY MAINTENANCE The trains for the secondary maintenance are given at least 2 hrs on the washing line. Linen and pantry car provisions Washing & cleaning of coaches Maintenance of AC of coaches

6. PRIMARY MAINTENANCE The trains for the primary maintenance are given at least 6 hrs at the washing line in addition to secondary maintenance Oil in hydraulic dash pots Wheel profiles are visually examined and gauged Pest control treatment Axle box is examined for grease oozing Brake blocks & piston stroke checked & changed

7. Sick line Sick line is the workshop for the major and periodical maintenance of the coaches. Works carried out in sick line Wheel and Axle Assembly Bogie Maintenance Buffer Maintenance Air Brake System Maintenance Trolley Maintenance Lifting of Coaches

8. Wheel and Axle Assembly 1. Width of wheel = 127 mm 2. Wheel Diameter = 915 (new), 825 (condemn) Permissible diameter variation in wheel Coaching On same axle – 0.5 mm On same bogie – 5.0 mm On same coach – 13.0 mm Goods a) On same axle – 0.5 mm b) On same bogie – 13.0 mm c) On same coach – 25.0 mm Fig. 1 Wheel profile (all length dimension are in mm)

9. Wheels are fixed on the axle with the help of bearings. Like wheel, it is also made up of steel. Brake cylinder are attached to axle. Braking discs are fixed on the axle Fig. 2 Axle

10. Buffer height adjustment Causes of low buffer height in ICF coaching stock : a) excessive wear of wheel b) Due to loss of proper stiffness of coil spring c) Due to excessive wear on side bearer’s metal & bronze piece. Maximum buffer height = 1105 mm [In empty condition] Minimum buffer height = 1030 mm [In loaded condition] To achieve buffer height a standard size of wooden packing pieces are used which are kept below the Dash Pot Flange on axle Box wings of primary suspension . Serial N0. Wheel Diameter (mm) Thickness of Wooden Packing (mm) 1. Below 889 up to 863 13 2. Below 863 up to 839 26 3. Below 839 up to 819 38 4. 819 & below 48

11. Air brake system maintenance Components of Air Brake System Brake Container Distributor Valve Pressure Tanks (125 liters, 6 liters) B.P. / F.P. coupling and hosts Emergency Brake Pull Box Emergency Brake Valve

12. Trolley Maintenance Parts of Trolley Trolley Frame Center pivot Side Bearing Brake Cylinder Fig. 3 Trolley

13. Lifting of coaches Require tools and equipments With the use of Mechanical Jacks With the use of Hydraulic Jacks With the use of Electrical operated Travelling Crane With the use of Whiting Jacks

14. PLATFORM TRAIN DUTY Rolling In Rolling out Axle box feeling Brake Power Certificate Safe to Run

15. ROLLING IN/ROLLING OUT When train enters in station Examiner staff take up positions on both sides inspect the train enters at the speed of 8 Km/hr Whistling sound of hot axle boxes. Any hanging part or loose fitting of vehicle. Any component or spring suspension bracket loose/broken. Abnormal behaviour of vehicle.

16. Axle box feeling After the train come to halt, all axle boxes are felt within 20 minutes. The temp. of axle is checked by touching with hand Temp. is found high then it is checked by the temp. gun which gives exact temp. If this temp. is found more than 30 degree than atm. temp. then the cause is inspected and coach is sent to workshop

17. BRAKE POWER Certificate This certificate is jointly signed by Guard , Driver, and C&W supervisor. The incoming driver shall handover the brake power certificate to Reliving driver or Deposit it the nominated authority, who will give it to the outgoing Driver. The outgoing driver and guard will satisfy themselves from the listed coach numbers that the Brake Power Certificate pertains to their train.

18. Safe to run If all of above factors like no hanging parts brakes are working correctly the temp of axle box is with in range and the train is in good and safe condition of running then the train is announced as safe to run .

19. THANK YOU ALL FOR YOUR KIND ATTENTION