Built at Maryborough | Formation 3 carriage sets | |
 | ||
Manufacturer Walkers Limited
Downer EDI Rail Constructed 1996-97 (100)
2001-02 (120)
2008-11 (160) Number built 36 carriages (100)
12 carriages (120)
84 carriages (160) Fleet numbers 101-110 (100)
121-124 (120)
161-188 (160) | ||
An interurban multiple unit (IMU) is a class of electric multiple units manufactured by Walkers Limited/Downer EDI Rail, Maryborough for Queensland Rail's Citytrain division between 1996 and 2011. The Interurban Multiple Unit is divided into in three subclasses, sets 101-110 as the 100 series, sets 121-124 as the 120 series, and sets 161-188, as the 160 series. The IMUs primarily operate services on Gold Coast and Airport lines, as well as some services on the Sunshine Coast line and peak hour suburban services.
Contents
Design
The Interurban Multiple Units are essentially a three-carriage long distance version of the Suburban Multiple Units. Internally, the IMUs differ from the SMUs, being fitted with larger seats, luggage racks and mobility-access toilets. Like most trains in the Citytrain fleet, two three-car IMUs can be coupled to form one six-car set.
100 series
To provide rolling stock for the new Gold Coast line to Helensvale, in 1993 a contract for four 100 class sets was awarded to Walkers Limited, Maryborough. The first four IMU100s, 101 to 104 entered service in 1996 before the opening of the new line. As these were never going to be adequate to operate all services on the line, in July 1995 a further six were ordered. They were delivered in 1997.
120 series
In 1999 four 120 series sets were ordered for the Airtrain line to Brisbane Airport.
These are fitted with high-backed seats, one toilet per unit and luggage racks in different configurations. The 100 series and 120 series are interoperable, and operate together in
revenue service as six-car sets. Both the 100 and 120 series were manufactured by Walkers Limited, Maryborough in partnership with ABB (100 series) and ADtranz (120 series).
All of the IMU120s entered service in 2002.
160 series
In 2004 Queensland Rail ordered sixteen 160 series sets to provide extra rolling stock in conjunction with the upgrade and duplication of the Gold Coast line. The 160 series were manufactured by Downer EDI Rail, Maryborough in partnership with Bombardier Transportation. These trains are identical in design to the Transperth B-series train, with alterations to the headlights to complement with the rest of the Citytrain fleet. These trains are interoperable with the 260 series Suburban Multiple Units as they both have outboard brake discs and plug-operated doors.
In early 2007 during safety checks, it was discovered that air-conditioning units on the trains were 10 millimetres too wide for the loading gauge.
On 28 May 2007, the first of the new IMUs entered service on the Gold Coast line.
Derailments
On 31 January 2013 IMU173 derailed at Cleveland station and ran into the station's toilet block. Only minor injuries were reported. The damaged car IM5173 was eventually repaired and returned to service.