Diesel Locomotive Works (DLW) in Varanasi manufactures diesel-electric locomotives for Indian Railways. It was established in 1961 in collaboration with ALCO, USA. DLW's annual production is 25 locomotives. The latest locomotive it produces, the WDG5, has a capacity of up to 5,500 HP. DLW supplies locomotives not just to Indian Railways but also to other countries and industries. It uses various machines like conventional, NC and CNC for manufacturing locomotives.

1. DIESEL LOCOMOTIVE WORKS
DIESEL LOCOMOTIVE WORKS
PRESENTATION
Shubham Vishwakarma
Mechanical 3rd year
AIMT Greater Noida

2. INTRODUCTION
- Diesel electric locomotives were introduced on Indian railway
in 1950's.
- Diesel Locomotive Works ( DLW ) was established in 1961 in
collaboration with M/s ALCO, USA in the ancient city of
Varanasi. It is spread in 300 acres area at Varanasi.
- it is a production unit owned by Indian railway, for which it
manufacturers diesel -electric locomotive and its spare parts.
- DLW is an ISO 9001:2008, ISO 14001:2004 and OHSAS 18001:
2007 Certified organization.

3. First Locomotive was flagged off by Late
Shri Lal Bahadur Shashtri on 3rd February
1964.

4. - In order to upgrade the technology, Indian railways entered into an in
1995, with M/s General Motors, USA for transfer of technology for the
manufacture of 4000 HP, fuel efficient WDG4/WDP4 locomotives at
DLW.
- At present the latest locomotive produced by DLW; I.e WDG5 has
capacity upto 5000 HP and trying to make it 5500 HP
- DLW is supplying locos to PSU's & industries like NTPC, COAL, INDOGULF
etc.
- DLW has also supplied locomotives to other countries such as Sri
Lanka, Bangladesh, Malaysia, Vietnam etc.

5. SOME FACTS ABOUT DIESEL
ELECTRIC LOCOMOTIVES
- DLW's annual Production - 25
- Cost of one loco - 12 to 14 crore (EMD)
- 8 crore (ALCO)
- Weight of one loco - 121 ton
- Fuel consumption; At full load - 540 lt/hr.
Idle load - 40 lt/hr.
- Max. Speed - 160 Km/hr.
- Dia. of wheel - 1092 mm
- Wheel to wheel distance - 1596.5 mm
- Length of under frame - 19962 mm

6. DIESEL ELECTRIC LOCOMOTIVE
In a diesel - electric locomotive, the diesel engine drives an electrical
generator or alternater whose output provides power to the
traction motors. There is no Mechanical connection between the
engine and the wheels.

7. CLASSIFICATION OF LOCOMOTIVES
- Locos, except the older steam ones, have classification codes that
identify them. This codes is of the form
WDG5A "| Gauge || power || load || series || subtype |"
- THE FIRST LETTER (Gauge)
W - Indian broad gauge
Y - Meter gauge
Z - Narrow gauge (2.5 ft)
N - Narrow gauge (2 ft)
- THE SECOND LETTER (Motive power)
D - Diesel
C - DC electric ( can run under DC traction only)

8. A - AC electric ( can run under AC traction only)
CA - Both DC and AC ( can run under both AC and DC
traction)
B - Battey electric locomotive ( rare)
- THE THIRD LETTER (Load type)
G - Goods
P - passenger
M - mixed traffic; both goods and passenger
S - used for shunting
U - electric multiple units ( E.M.U )
R - Railcars

9. - THE FOURTH LETTER ( Series)
The series digit identifies the horsepower range of the
locomotive.
Example. For the series Letter '3' means that the
locomotive has power over 3000 HP but less than 4000
HP.
- THE FIFTH LETTER (Subtype)
An optional letter or number that indicates some smaller
variations in the basic model.
For Ex. 'A' for 100 HP
'B' for 300 HP

10. PRODUCTS
WDG-5 - High adhesion
Diesel-electric 5500 HP
main line heavy goods
service locomotive, with GM
( AC-AC traction)
WDG-4D - High adhesion
Diesel-electric 4500 HP
main line heavy goods
service locomotive, with GM
( AC-AC traction)

11. WDP-4D - High adhesion
Diesel-electric 4500 HP
main line heavy pessenger
service locomotive, with GM
( AC - AC traction)
WDG3A - 3100 HP main
line heavy goods service
locomotive, with uprated 16
cylinder ALCO engine
( AC -DC traction )

12. WDS6 - 1350 HP Diesel-
electric shunting/short
haul locomotive with 6
cylinder.
2.4 MW DG Sets - 2.4 MW
DG Set using 16 cylinder,
3600 HP ALCO Diesel
Engine.

13. PRODUCTION SHOPS AT DLW
1. Block Division
2. Engine Division
3. Loco Division
1. BLOCK DIVISION
Heavy weld shop
Heavy Machine shop

14. 2. ENGINE DIVISION
Engine erection shop
Engine testing shop
Light Machine shop
Sub Assembly shop
Rotor shop
Heat treatment shop
Turbo section

15. 3. LOCO DIVISION
Loco Frame shop
Pipe shop
Truck and Machine shop
Traction Assembly shop
Sheet Metal shop
Loco Assembly shop
Loco Paint shop
Loco Test shop

16. TYPES OF MACHINES USED AT DLW
1. Conventional Machine
2. NC Machine
3. CNC Machine
- CONVENTIONAL MACHINE :
It is a simple machine which is now an Old technique.
- NUMERICAL CONTROL MACHINE :
Numerical control is defined as a system in which the
actions of the machines are controlled by the Insertion of
the numerical data. In other words number Controls the
action.

17. COMPUTERISED NUMERICALLY CONTROLLED
MACHINE
- In CNC the control system further energized With a mini computer
or a post processor.
- The control unit stores the programmed Information of the work
piece, the travel Limits, collision zones and the diagnostic
information etc. it also gives a feedback to The operator about the
current position and distance to be travelled etc.
- CNC Machine have ability to edit or alter the existing program in
no time.

18. THANKS