A Stoneblower is a track maintenance vehicle. It is designed to keep the track level. It fills voids under sleepers that have developed over time. The track is lifted and small chippings are blown into the voids to make the track level again.
The original technique to solve this issue was tamping. The track was lifted and the ballast pushed back under the sleepers. The ballast has a memory and this process needed to be done regularly. Stoneblowing actually blows small chips under the sleepers to fill the void so the ballast isn't tampered with and has a longer lasting effect on the track.
This can be a lengthy process as the track can only be lifted within certain temperatures.
I believe this is the 80200 Stoneblower built by Pandrol Jackson in 1995 the first production unit to be received by British Rail. After successful testing during 1996 seven more stoneblowers were ordered from Pandrol Jackson.
Remember you can follow me on the social media below and add your email to receive future notifications of posts on here.