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Plasser and Theurer 09 Series Tamper

The Plasser and Theurer 09 series supplement earlier tampers (which tamp or pack down the ballast under sleepers to maintain a firm track bed), including the company's 08 Series also used by Network Rail. The 09-3X tampers, known by Plasser and Theurer as Tamping Express, have been built since 1996 and over three hundred have been delivered worldwide [1]. They operate on three sleepers at a time and offer higher performance than earlier types. The tamper also has an Automatic Guiding Computer and each sleeper bank can be lifted or lowered individually to cope with track of lower quality.
Network Rail 09-3X DR73114 at Derby

Information for 09-3X-D-T
Number built: 7
Builder: Plasser & Theurer
Power: 630 hp (496 kW)

Although the tampers used by Network Rail are usually owned by third parties Network Rail own a fleet of seven 09-3X-D-T tampers [2].
Swietelsky operated tamper heads through Rugeley Trent Valley


Another view of DR73114

DR73114 is named Ron Henderson

[1] "Unrivalled for twenty years", Plasser and Theurer press release <https://aktuell.plassertheurer.com/en/aktuell132/seit-20-jahren-unerreicht>
[2] Colin J Marsden, Rail Guide 2016 (Ian Allan, 2016) p. 208