NZR DSB class
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| Type and origin | |
|---|---|
| Power type | Diesel-Mechanical/Hydraulic |
| Builder | Drewry Car Co (25), Mitsubishi Heavy Industries (3) |
| Build date | 1954-67 |
| Specifications | |
|---|---|
| AAR wheel arr. | 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 |
The DSB class is a class of shunting locomotive introduced to New Zealand in 1954.
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). 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,
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.
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Wikipedia