Theodore2940: reworked section also and fixed typos to improve readability

2026-01-07T09:52:30Z

reworked section also and fixed typos to improve readability

imported>Abdullah8031 at 03:43, 27 July 2021

2021-07-27T03:43:31Z

← Older revision		Revision as of 09:13, 27 July 2021
Line 158:		Line 158:
	[[Category:ALCO locomotives]]		[[Category:ALCO locomotives]]
	[[Category:Railway locomotives introduced in 1961]]		[[Category:Railway locomotives introduced in 1961]]
	[[Category:Metre gauge ~~diesel~~ locomotives]]		[[Category:Metre gauge locomotives]]

2405:205:C961:ABEB:0:0:2AD7:90AD at 07:43, 12 May 2021

2021-05-12T07:43:17Z

New page

{{Infobox locomotive
| name = YDM-4
| powertype = Diesel
| image = SABI YDM4.jpg
| alt =
| caption = Sabarmati based YDM-4 at Talala Jn.
| builder = [[American Locomotive Company|Alco]], [[Montreal Locomotive Works|MLW]], [[Banaras Locomotive Works|BLW]]
| ordernumber =
| serialnumber =
| buildmodel = [[ALCO DL535|DL535]], [[ALCO DL535A|DL535A]], [[RSD-30]]
| builddate = 1961 onwards
| totalproduction = YDM-4: 695
| rebuilder =
| rebuilddate =
| numberrebuilt =
| aarwheels =
| uicclass = [[Co-Co locomotives|Co-Co]], Co'Co'
| gauge = {{RailGauge|1000mm|allk=on}}
| trucks =
| bogies =ALCO Asymmetric cast frame trimount
| wheeldiameter = {{convert|965|mm|in|2|abbr=on}}
| trailingdiameter =
| minimumcurve =
| wheelbase =
| length = {{convert|15.60|m|ftin|abbr=on|frac=8}}
| width = {{convert|2730|mm|ftin|frac=8|abbr=on}}
| height = {{convert|3635|mm|ftin|frac=8|abbr=on}}
| axleload = {{convert|12000|kg|abbr=on}}
| weightondrivers =
| locoweight = {{convert|72000|kg|abbr=on}} ALCo/DLW, {{convert|67000|kg|abbr=on}} MLW
| fueltype = [[Biodiesel|Diesel]]
| fuelcap = {{convert|3000|L|abbr=on}}
| lubecap = {{convert|530|L|abbr=on}}, {{convert|630|L|abbr=on}} DLW
| coolantcap =
| watercap = {{convert|22|L|abbr=on}}, {{convert|28|L|abbr=on}} DLW
| sandcap =
| consumption =
| watercons =
| primemover = [[ALCO 251|ALCO 251-D]]
| rpmrange = 400-1100
| enginetype = [[Straight-six engine|Inline-6]] [[Diesel engine|diesel]]
| aspiration = [[Turbo-supercharger|Turbo-supercharged]]
| displacement = '''''(?)'''''
| alternator =
| generator = [[Direct current|DC]]
| tractionmotors = 6 DC
| cylindercount = 6
| cylindersize = {{convert|228 x 267|mm|in|2|abbr=on}} [[Bore (engine)|bore]] x [[Stroke (engine)|stroke]]
| transmission = [[Diesel-electric transmission]]
| multipleworking = 2
| maxspeed = {{convert|96|km/h|0|abbr=on}}
| poweroutput = Max:{{convert|1400|HP|abbr=on}}<br>Site rated:{{convert|1300|HP|abbr=on}}
| tractiveeffort ={{convert|18.935|t|0|abbr=on}} maximum {{convert|16.050|t|0|abbr=on}} continuous
| factorofadhesion =
| trainheating =
| locobrakes = 28LV-1, [[Railway air brake|Air brake]] for Locomotive using SA-9 brake handle
| locobrakeforce =
| trainbrakes = Originally [[Vacuum brake|Vacuum]] using A-9 brake handle, some modified to [[Vacuum brake#Dual brakes|Dual]]
| safety =
| operator =[[Indian Railways]], [[Keretapi Tanah Melayu|KTM]]B Malaysia, [[Myanmar Railways]]
| operatorclass =
| powerclass =
| numinclass =
| fleetnumbers =6020-6049 ALCo, 6105-6129 ALCo, 6130- 6198 MLW, 6199-6258 DLW, 6259-6288 MLW, 6289-6769 DLW
| officialname =
| nicknames =
| axleloadclass =
| locale =All over Indian Railways, Leased to [[Keretapi Tanah Melayu|KTM]]B Malaysia, Leased to Myanmar Railway
| deliverydate =
| firstrundate =
| lastrundate =
| retiredate =
| withdrawndate =
| preservedunits =3
| restoredate =
| scrapdate =
| currentowner = Indian Railway, IRCON, KTMB Malaysia, Myanmar Railway
| disposition = active
}}

The class '''YDM-4''' is [[Indian Railways]]' workhorse [[diesel locomotive]]. The first units were imported fully built from the [[American Locomotive Company]] (Alco) in 1961. Since 1968, it has been manufactured in India by the [[Banaras Locomotive Works]] (BLW), Varanasi. The model name stands for [[metre gauge]] (Y), diesel (D), mixed traffic (M) engine. The YDM-4 has been the most successful diesel locomotive in the metre gauge operation of Indian Railways.

The '''YDM-4A''' is a variant of the YDM-4 supplied by [[Montreal Locomotive Works|MLW]] . Originally equipped with [[vacuum brake]]s. Some were later equipped with dual brakes, particularly those working in the Northeast Frontier Railway were retrofitted with dual brake system by Lumding shed. The YDM-4 locos have a maximum speed of {{convert|100|km/h|abbr=on}},<ref name = "IRFCA">{{cite web |url = http://www.irfca.org/faq/faq-loco-diesel-mg.html |title = YDM–4, YDM–4A |publisher = Indian Railways Fan Club|access-date = March 29, 2016}}</ref> restricted to {{convert|85|km/h|abbr=on}}.<ref name = "RDSO">{{cite web |url = http://www.rdso.indianrailways.gov.in/works/uploads/File/19_08_67.pdf |title = YDM4 Loco Max Operating Speed 85 kmph |author= RDSO |date= 19 August 1967 |publisher = Research Designs and Standards Organisation (RDSO) |access-date = March 29, 2016}}</ref>

==History==
In the mid 1950s [[Indian Railways]] began introducing diesel locomotives to its metre gauge system. Metre gauge, though rare gauge today, used to be a dominant gauge that time. After the introduction of YDM-1 locomotives by [[North British Locomotive Company|North British]], Indian Railway thought for more powerful ones and hence [[Electro-Motive Diesel|General Motors Electro-Motive Division]] (EMD) and the [[American Locomotive Company]] (ALCO) submitted designs of [[Indian locomotive class YDM-3|YDM-3]]/[[Indian locomotive class YDM-5|YDM-5]] ([[EMD 567|12-567C]]) and YDM-4 respectively for new diesel locomotives. Each company supplied 30 locomotives in 1961. While YDM-3 was 13 ton lighter than the YDM-4, Indian Railways opted for the [[ALCo]] design because of the heavier axle load and technology agreement that would allow these locomotives to be manufactured in India. After [[Banaras Locomotive Works]] (BLW) completed construction of its factory in Varanasi, production of the locomotives began in India. Initial 30 YDM-4 locomotives supplied by American Locomotive Company (ALCo) in 1961 had the road numbers in #6020 to #6049 range. Another batch of 8 locomotives followed the route to India soon which had the road numbers in #6105-6112 range. YDM-4 #6113-6129 were built perhaps in 1964.
Siliguri Diesel Locoshed was the first DLS to home YDM-4 locomotives in 1962. The very first YDM4 numbered as #6020 was allotted to New Guwahati Diesel Loco Shed which was an outbase of Siliguri DLS on 30/10/1962. The loco, however is assumed to be scrapped due to overage.

YDM4 numbered in #6130 to #6198 range were built by [[Montreal Locomotive Works]] (MLW) in 1964 under the license of ALCo and were classified as YDM-4A. All the YDM-4 delivered till then were presumably based at three premier DLS across India namely Siliguri (SGUJ), Golden Rock (GOC) and Sabarmati (SBI).

The First YDM-4 built by Banaras Locomotive Works (BLW) Varanasi was #6199 christened as Hubli. This loco rolled out from DLW in 1968 and was dedicated to the nation by the then Deputy Prime Minister of India, Morarji Desai. DLW built at first locos in the range #6199 to #6258.

Another batch of YDM-4A were dispatched from MLW in 1969 in the range #6259 to #6288.

From 1969 till 1993 DLW produced YDM-4 locomotives for Indian Railways in the number range #6289 to #6769. Last YDM-4 was based at Rangapara North outbase of Siliguri DLS but later on transferred to [[Myanmar Railways|Myanmar (Burma) Railways]] and possibly renumbered as DF1332.<ref>{{cite web |url = https://www.facebook.com/YDM4-492488834113077/info?tab=page_info|title=YDM4 - About}}</ref>{{Better source|date=October 2018}}

==Locomotive sheds==
{| class="wikitable"
|-
! Zone !! Name !! Shed Code !! Quantity
|-
| [[North Eastern Railway zone|North Eastern Railway]] || [[Izzatnagar]] || IZN|| 24
|-
| [[North Western Railway zone|North Western Railway]] || [[Phulera railway station|Phulera]] || FL || 8
|-
| [[Southern Railway zone|Southern Railway]] || [[Diesel Loco Shed, Golden Rock|Golden Rock]] || GOC|| 5
|-
| rowspan="2" |[[Western Railway zone|Western Railway]] || [[Diesel Loco Shed, Sabarmati|Sabarmati]] || SBI || 12
|-
| [[Diesel Loco Shed, Mhow]] || MHW || 8
|-
| colspan="3" | '''Total Locomotives Active as of 01-07-2020'''<ref>{{Cite web|title=Railway Website Mechanical Department|url=http://www.indianrailways.gov.in/railwayboard/view_section.jsp?lang=0&id=0,1,304,366,541,710,717|access-date=16 May 2020}}</ref> || 57
|-
|}


==Technical specifications<ref>{{cite web|url=http://www.irfca.org/faq/faq-loco2d.html#wdm-2|title=[IRFCA] Indian Railways FAQ: Locomotives -- Specific classes : AC Electric|website=www.irfca.org}}</ref>==
{| class="wikitable"
|Manufacturers
|Alco, MLW, DLW
|-
|Engine
|Alco 251-D, [[Straight-six engine|Inline-6]], {{convert|1,400|hp|abbr=on|lk=on}} ({{convert|1,300|hp|abbr=on|disp=or}} site rating) with Alco turbocharged engine. 1,100 rpm max, 400 rpm idle; {{convert|228|x|267|mm|in|2|abbr=on}} bore x stroke; compression ratio 12.5:1.
|-
|Transmission
|Electric, DC-DC (DC Generator and DC Traction motor)
|-
|[[Traction motor]]s
|GE for original Alco and MLW models, BHEL for DLW
|-
|[[Axle load]]
|{{convert|12.0|t|abbr=on}}
|-
|total weight
|{{convert|72.0|t|abbr=on}} ALCo and DLW, {{convert|67.0|t|abbr=on}} MLW
|-
|[[Bogie]]s
|Alco design cast frame trimount ([[Co-Co engine|Co-Co]]) bogies with asymmetrical arrangement of traction motors
|-
|Starting TE
|{{convert|18.94|t|abbr=on}}
|-
|Continuous TE
|{{convert|16.05|t|abbr=on}}
|-
|}

==References==
{{Reflist}}

==External links==
* [http://www.irfca.org/docs/ydm4-internals.html YDM-4 Diesel Locomotive Internals]

{{Metre gauge locomotives of India|state=expanded}}

[[Category:Diesel-electric locomotives of India|M, Y-4]]
[[Category:Co-Co locomotives]]
[[Category:ALCO locomotives]]
[[Category:Railway locomotives introduced in 1961]]
[[Category:Metre gauge diesel locomotives]]

Indian locomotive class YDM-4 - Revision history

Theodore2940: reworked section also and fixed typos to improve readability

imported>Abdullah8031 at 03:43, 27 July 2021

2405:205:C961:ABEB:0:0:2AD7:90AD at 07:43, 12 May 2021