NZR DSB class

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The DSB class is a class of shunting locomotive introduced to New Zealand in 1954.

New Zealand DSB class
Type and origin
Power type Diesel-Mechanical/Hydraulic
Builder Drewry Car Co (25), Mitsubishi Heavy Industries (3)
Build date 1954-67
Specifications
Configuration:
 • AAR 0-6-0
Gauge 1,067 mm (3 ft 6 in)
Length Drewry: 8.8 m (28 ft 10 in)
Mitsubishi:8.5 m (27 ft 11 in)
Loco weight 37 tonnes (36 long tons; 41 short tons)
Prime mover Drewry: National M4AA7;
later: Caterpillar D343TA
Mitsubishi: Caterpillar D343TA
Performance figures
Maximum speed Drewry: 39 km/h (24 mph);
later: 57 km/h (35 mph)
Mitsubishi: 56 km/h (35 mph)
Power output 195 kW (261 hp)later: 263 kW (353 hp)
Mitsubishi:280 kW (380 hp)
Career
Operators NZGR, New Zealand Railways Corporation
Number in class 28
Numbers TMS numbers: 1003-1290
Road numbers: 300-327
Locale All of New Zealand
First run August 1954
Last run April 1989
Current owner Avon Engineering (1), Mainline Steam Heritage Trust (1)
Disposition 1 preserved, 27 scrapped

About[edit]

Circa 1950, the New Zealand Railways Department placed an order for 25 DSB shunting locomotives. They were built by the Drewry Car Co. between 1954 and 1956. The first three DSB class locomotives were commissioned in August 1954. The DSB are a larger and more powerful locomotive than the DSs and DSAs, and were used all over New Zealand. By the end of their lives 12 DSBs were repainted in the "International Orange" livery. Three were purchased for industrial service with DSB 1153 going to New Zealand Milk Products (later subsumed into Fonterra) to shunt their Whareroa milk factory, 1194 to Pacific Steel at Otahuhu scrap plant and 1221 to Avon Engineering at their Kamo plant. DSB 1221 was sold in 1986 while the other two were sold in April the same year. In 1963 all Drewry builds were re-engined with Caterpillar D343TA replacing their National M4AA7 which they entered service with. This increased their power output from 195 kW (260 hp) to 293 kW (353 hp).[1] In the 1960s the New Zealand Railways placed an order for three more DSBs. These three were built by Mitsubishi Heavy Industries. As of July 2014 only one has been preserved, DSB 313 was purchased in January 1991 by the Mainline Steam Heritage Trust for shunting uses at their Parnell depot. also Dsb 321 once owned by Kamo still remains there today but it is in parts, [2]

Mitsubishi for industry[edit]

Road numbers ORBs 1 and 2
Maker's Nos 1475 and 1476

Two 0-6-0 locomotives were built by Mitsubishi Heavy Industries for industrial service for the Ohai Railway Board in 1967.

ORB 1 was withdrawn in 1989 due to heavier trains and was replaced by DJ 3303. In 1990 the New Zealand Railways Corporation took over the Ohai Railway Boards section of the Wairio Branchline. It was then stored in Wairio until being sold to the Ohai Railway Board Heritage Trust for preservation.

ORB 2 shares a similar operating history to ORB 1, but was withdrawn in 1990. Stored in Wairio until 1992 when it was purchased by Reid McNaught for Steam Incorporated. It was then sold to Richard Gibbard in the early 2000s and is still in service for shunting uses by Steam Inc..

Class register[edit]

Key: In service On lease Out of service Preserved Overhaul or repair Scrapped
Original no. TMS no. Builder Introduced Withdrawn Allocated Notes
300 1003 Drewry August 1954 August 1986 South Island
301 1016 Drewry August 1954 April 1989 North Island
302 1029 Drewry August 1954 August 1986 North Island
303 1031 Drewry September 1954 April 1987 North Island
304 1044 Drewry September 1954 March 1981 North Island
305 1057 Drewry December 1954 December 1988 North Island
306 1072 Drewry 1954 August 1986 North Island
307 1085 Drewry December 1954 October 1982 South Island
308 1098 Drewry December 1954 December 1988 North Island
309 1112 Drewry May 1955 August 1986 North Island
310 1125 Drewry March 1955 October 1986 North Island
311 1138 Drewry March 1955 December 1988 North Island
312 1140 Drewry March 1955 November 1983 North Island
313 1153 Drewry April 1955 April 1986 North Island Preserved, Mainline Steam.
314 1166 Drewry April 1955 December 1988 North Island
315 1179 Drewry May 1955 April 26, 1980 North Island
316 1181 Drewry June 1955 December 1988 North Island
317 1194 Drewry August 1956 April 1986 North Island Formerly used by Pacific Steel at Otahuhu. Scrapped 1995.
318 1206 Drewry June 1955 August 1986 North Island
319 Drewry November 1955 September 1978 North Island
320 1219 Drewry July 1955 April 1987 North Island
321 1221 Drewry June 1955 February 1986 North Island Formerly used at Avon Engineering, Kamo.
322 1234 Drewry August 1955 April 1987 North Island
323 1247 Drewry March 1956 December 1988 North Island
324 1262 Drewry December 1955 December 1988 North Island
325 1275 Mitsubishi October 1967 December 1988 South Island
326 1288 Mitsubishi October 1967 December 1988 South Island
327 1290 Mitsubishi September 1967 February 1988 South Island

Industrial locomotive register[edit]

Key: In service On lease Out of service Preserved Overhaul or repair Scrapped
Builder Builders Number Entered Service Withdrawn Notes
Mitsubishi 1475 1967 1990 Formerly used by the Ohai Railway Board as their NO 1. Preserved, Ohai Railway Board Heritage Trust.
Mitsubishi 1476 1967 1990 Formerly used by the Ohai Railway Board as their NO 2 Preserved, Steam Incorporated.

References[edit]

  1. ^ "Railfan". 7 (2). Triple M Publications. March 2001. ISSN 1173-2229. 
  2. ^ "Railfan". 2 (2). Triple M Publications. March 1996. ISSN 1173-2229.