training at south-east central railway

1. Submitted by:-
VIJAY PATEL
Industrial & Production Engg.

2. SICK LINE
• Sick line is the workshop for the major and periodical
maintenance of the coaches.
• It consists of modern facilities like pit for working
under frame And crane for separation of coach &
bogie for repair of all type of defects.

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

4. • ICF- Integral Coach Factory(Chennai)
• RCF- Rail Coach Factory( Kapurthala , Punjab)
• LHB- Link Holfmann Bushh (Fiat Bogies)
COACHES

5.  Width of wheel – 127mm.
 Wheel diameter – 915mm
 Axle capacity – 13T(Non AC) -16T(AC)
 Permissible diameter variation in wheel (coaching)
a) On same axle -0.5mm(for machining purpose only)
b) On same bogie -5.0 mm
c) On same coach – 13.0 mm
ICF/RCF

6. Washing Line
1. Trip Schedule : After every trip by primary maintenance depot.
 Sick Line
1. Schedule A : Monthly (1 month )
2. Schedule B : Quarterly (3 months)
3. Schedule C : 6 Months
4. IOH : Every 9 months
5. POH : Every 18 months
MAINTENANCE SCHEDULE AND
CATEGORY

7.  Higher carrying capacity
 Low corrosion
 Longer life (30 years)
 Lesser weight
 Lesser maintenance
 Max tested speed of 180km/hr compared to 110 km/hr of
ICF
 Better passenger comfort
Ride Index of LHB <2.75 compared to 3.25 of ICF
LHB coaches over ICF

8. 1. Width of wheel = 127 mm
2. Wheel Diameter = 915
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
• On same axle – 0.5 mm
• On same bogie – 13.0 mm
• On same coach – 25.0 mm
Wheel and Axle Assembly

9. 1. Wheel and Axle Assembly
2. Bogie Maintenance
3. Buffer Maintenance
4. Air Brake System Maintenance
5. Trolley Maintenance
6. Lifting of Coaches
7. Riding Index
WORKS CARRIED OUT IN SICK LINE

10. 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

11. In Air Brake system compressed air is used for operating the
brake system. The locomotive compressor charges the feed
pipe and the brake pipes throughout the length of the train.
The feed pipe is connected to the auxiliary reservoirs and the
brake pipe is connected to the brake cylinders through the
distributor valve. Brake application takes place by dropping the
pressure in the brake pipe.
TYPES:
1. Direct Release System- brakes are released immediately,
as soon as releasing of brakes is initiated.
2. Gradguate Release System - brake cylinder pressure can
be reduced gradually in steps in proportion to the increase in
brake pipe pressure.
AIR BRAKE SYSTEM

12. • Single Pipe Air Brake System:- There is only one
pipe called brake pipe running from loco to the
brake van in order to get continuity of air for the
application & release of brakes.
• Twin Pipe Air Brake System :- In addition to brake
pipe, there is one more pipe called feed pipe ,
running loco to the brake van to charge the
auxiliary reservoir continuously to 6 kg/cm2
Types of Gradguate Release System

13. Trolley Maintenance
Parts of Trolley
1. Trolley Frame
2. Center pivot
3. Side Bearing
4. Brake Cylinder
Fig. 3 Trolley

14. 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

15. Riding is a quality of comfort experienced by passenger,
depends not only upon acceleration, rate of change of
acceleration & vibration but also some other factors as like
noise, moisture temperature etc.
Ride Index = 0.896
10 𝑏3
𝑓
𝐹(𝑓)
b : Amplitude of acceleration
f : Frequency of acceleration
F(f) : a correction factor dependent on the frequency
Ride index for ICF: <3.5
for LHB<2.75
RIDING INDEX

16. THANK
YOU