RAILWAY MAINTENANCEAT

SUBMITTED BY :

SATYAM SINGHB.Tech [ME-D] 4th Year11010624711SETME252

CLASSIFICATION OF COACHING MAINTENANCE DEPOTS

Serial No. Depot No. of based Coaches

1 Minor 50 – 100

2 Medium 100 – 250

3 Major Above 250

MAINTENANCE SCHEDULE and category

Washing Line

1. Trip Schedule : After every trip by primary maintenance depot.

Sick Line

2. Schedule A : Monthly (1 month + 7 days)

3. Schedule B : Quarterly (3 months + 15 days)

4. Schedule C : After 180 days or 6 Months

5. IOH : Every 9 months

6. POH : Every 18 months

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

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 washingline.

Linen and pantry car provisions

Washing & cleaning of coaches

Maintenance of AC of coaches

PRIMARY MAINTENANCE

The trains for the primary maintenance are given at least 6 hrs at the washing linein 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

Sick line

Sick line is the workshop for the major and periodical maintenance of the coaches.

Works carried out in sick line

1. Wheel and Axle Assembly

2. Bogie Maintenance

3. Buffer Maintenance

4. Air Brake System Maintenance

5. Trolley Maintenance

6. Lifting of Coaches

Wheel and Axle Assembly

1. Width of wheel = 127 mm2. Wheel Diameter = 915 (new), 825 (condemn)

Permissible diameter variation in wheel

Coaching

a) On same axle – 0.5 mmb) On same bogie – 5.0 mmc) On same coach – 13.0 mm

Goods

a) On same axle – 0.5 mmb) On same bogie – 13.0 mmc) On same coach – 25.0 mm

Fig. 1 Wheel profile (all length dimension are in mm)

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

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

Air brake system maintenance

Components of Air Brake System

1. Brake Container

2. Distributor Valve

3. Pressure Tanks (125 liters, 6 liters)

4. B.P. / F.P. coupling and hosts

5. Emergency Brake Pull Box

6. Emergency Brake Valve

Trolley Maintenance

Parts of Trolley

1. Trolley Frame

2. Center pivot

3. Side Bearing

4. Brake Cylinder

Fig. 3 Trolley

Lifting of coaches

Require tools and equipments

1. With the use of Mechanical Jacks

2. With the use of Hydraulic Jacks

3. With the use of Electrical operated Travelling Crane

4. With the use of Whiting Jacks

PLATFORM TRAIN DUTY

Rolling In

Rolling out

Axle box feeling

Brake Power Certificate

Safe to Run

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.

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

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.

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.

THANK YOU ALL FOR YOUR KIND ATTENTION