Narrow-gauge locomotives of India

NDM & ZDM
NDM1a No. 500 at the head of a train departing to Matheran at Neral station.
Type and origin Power type Diesel-hydraulic Builder Arnold Jung Lokomotivfabrik GmbH (Jung) Central Railway Loco Workshop, Parel (Parel) Chittaranjan Locomotive Works (CLW) Suri and Nayar (SAN) Engg. and Loco Co. (SAN) Maschinenbau Kiel GmbH (MaK) Model NDM-1/5/6, ZDM-2/3/4/5 Build date 1955
Specifications Configuration: ​  • UIC B+B Gauge ZDM: 2 ft 6 in (762 mm) NDM: 2 ft (610 mm) Minimum curve 15 m (49.21 ft) radius Loco weight 29 tonnes (29 long tons; 32 short tons) Prime mover MWM TRHS 518S (2) Engine type 145–128 hp (108–95 kW), 2 off Transmission Twin Voith Turbo-Transmissions
Performance figures Maximum speed 33 km/h (21 mph) Power output 290 hp (216 kW) Tractive effort Starting: 86.2 kN (19,400 lbf)
Career Operators Indian Railways Numbers NDM-1:400-407, 500-506, 550,551/NDM:5:801-814/NDM-6:600-605/ZDM-2:123-147/ZDM-3:148-197, 700-720/ZDM-4:198-236/ZDM-5:501-541 Locale Matheran Hill Railway Pragati Maidan

Locomotives in Indian locomotive class NDM and ZDM series include NDM-1/5/6 and ZDM-2/3/4/5.

Specifications

Specifications

Name	Year	Manufacturer	Engine	Transmission	Wheels	Power(HP)	Speed(KM)	Weight(tonnes)	Starting TE (kg force)	Quantity	Serial No.
NDM-1	1955	Arn. Jung	MWM TRHS 518S, 145/128hp	Twin Voith hydraulic	B+B	2x145	33/16	29	8790	7	500-506(500, 504-506 ex-ZDM-1)
NDM-5	1987-89	CLW	KCL KTA-1150L, 450hp	Voith hydraulic	B-B	450	50	22		11	801-811
NDM-6	1997	(SAN) Engg. and Loco Co.	Kirloskar-Cummins NTA 855L	Voith hydraulic	B	335	30	17.2		6	600-605
ZDM-1	1955	Arn. Jung			B+B	2x145	33	29	8790	5	543-547
ZDM-2	1964-65	Maschi-nenbau Kiel	Maybach V8 MD435	Voith hydraulic	B-B	700 (650 net)	50	32	10560	25	123-147
ZDM-3	1970-82	CLW	Mak/CLW 6M 282 A(K)	Suri hydromechanical transmission	B-B	700	50 down / 32 up	35	10500	40	148-167/178-187/168-177 (ex-ZDM-4)
ZDM-4/4A	1975-77/1982-90	CLW	Mak/CLW 6M 282 A(K)	Voith hydraulic	1-B-B-1	700	50	39	7800	10/39	4: 168-177(later rebuilt as ZDM-3)/4A: 198-236
ZDM-5	1989+	CLW	KCL KTA-1150L	Voith hydraulic	B-B	450	50	23		41+	501+

NDM and ZDM Series Locomotives

Name	Produced	In Service
NDM-1	17	12
NDM-5	14	13
NDM-6	06	06
ZDM-3	70	23
ZDM-4	39	24
ZDM-5	41	27
Total locomotives in service as of May 2020		105

See also

• Indian Railways
• Indian Locomotives
• Indian locomotive class WDM-2
• Indian locomotive class WAP-4
• Indian locomotive class WAP-5
• Indian locomotive class WAP-7
• Indian locomotive class WAG-9

References

Bibliography

• Hughes, Hugh (1996). Indian Locomotives: Part 4 – 1941–1990. Harrow, Middlesex: The Continental Railway Circle. ISBN 0-9521655-1-1. OCLC 35135033.
• Indian narrow gauge diesel loco information

External links

• Information on Indian diesel locomotives