Restoration

The Restoration Story

The loco has been under the Trust's ownership since 2016 and this page provides a timeline for each year of restoration.

2022 2021 2020 2019 2018 2017 2016

Most of our volunteer's efforts at the start of the year must necessarily be devoted to the winter maintenance tasks on working locomotives so there is a limit to what we are able to do. However, our contractors at Roach Engineering are progressing our new drag box. The photo shows it part machined - it is now finished and awaiting delivery to Toddington As you can see, its a big chunk of metal! It will be really good to get this in place on the loco.

We have also made some more progress with the "rivetting" project - the new footplating we have made needs lots of holes drilled to match the existing fixing points. We have acquired a set of heavy duty, centre point punches - we choose the right size for the existing holes in the framework (and they are far from all the same size!), quick tap on the punch through the existing hole and mark the new platework then get to work with the mag drill. Sorry there are no photos of this work in progress as I was too busy with the drill to take any - will do better next time.

Now we have the funds (thanks to you, our supporters) for the new smoke box, we are getting quotes for the next stage - this will be the purchase of the door ring and the door itself. We have bought a new "curve mag drill" which will be invaluable in drilling the many holes both for the door end and for attachment to the boiler in due course.

In the machine shop at Toddington, our eccentric straps have been completed - a next stage is to have the eccentrics themselves machined. To progress this we have acquired a "dummy axle" that will be used to mount the eccentrics in the machine shop and get them true. Then will come the application of the bearing surface of white metal - to get ready for this stage we have sourced 50kg of (very expensive) ingots of the metal. Fortunately, the material machined off can be recycled.

The new rear eccentric straps matched with the existing parts - all the bolts that hold them together had to be made to match.

Metal restoration has played a large part in our work to date - hardly surprising considering the many years in the open since withdrawal in 1963!

The reverser frame is largely in good condition but wioth some localised corrosion where the damp coal dust accumulated under the cab floor - here it is when still attached to the rusting floor

The frame was removed and the rusted section cut out.

A new piece was ordered and then carefully cut to the exact size to match - we cut the corroded sections well back to get a really solid repair. The edges were then shaped to allow a good weld to made - here we are ready clamped up for the welder.

2021

We have put together a gallery of images to illustrate some of our work over the year (in case you don't have time to read the full article!

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New frame stretcher – ready for riveting in place.

Badly corroded steelwork.

New replacement pieces being fabricated.

The new pieces clamped in place – ready for welding then the whole section will be riveted in place – once this is secure, the old buffer beam can be removed and the new one riveted. Below the new section, the drag box can be seen – this will also be replaced as part of the riveting exercise.

Here can be seen some sections of new footplating - as the frames are not quite "square" anymore (due to years of wear and tear) some trimming is needed then drilling will be needed to match the rivet holes in the supporting frames - then we can rivet the platework into place.

We did find one of the arms that supports the outer frame in position had a major problem - Like many of these components, it had been repaired during its BR service days but not very well! The piece was removed - it had been welded on as well as riveted - and can be seen below with the detached end plate.

and below is the repaired section ready for re-riveting into place

Work has been undertaken on the horns in preparation for the horn grinding - here is Dave at work with the rotary wire brush and the finished surface

Pitting can be seen on the cleaned surface - the horn grinding will result in a perfectly flat section - measuments have shown that even when ground, we can have years of service from these components.

Work has also been underway on our axle boxes - these have all been thoroughly cleaned prior to refurbishment. Unfortunately, during the years in storage four of the axlebox underkeeps have been removed and most likley used on other locomotives - we have ordered four new castings which were delivered in the Autumn - these will then need some machining before being ready to fit. The wooden pattern for the castings are pictured - looks complicated but the foundry seem to understand whats was needed

The new castings went on display at the november Gala

The top covers of the axleboxes have badly corroded and require replacement - 8 new ones have been made (two pictured below). These now require drilling to match the individual boxes.

And from the machine shop - refurbished brake hangers

A batch of clack valves - one finished and lots of components for the rest - at the back of the photo csn be seen the brass bar that the valve parts were turned from

To allow restoration work on the timing mechanism of the loco, a number of the components must be removed (carefully!) before they're can be overhauled. One of the rocker arms has proved very stubborn and has resisted the efforts of copper hammers, oxy-acetelyne torchs and a hydraulic press - part of the problem being the difficulty in applying the ram of the press. To solve the issue, a former has been made to fit over a bracket on the frames - this will allow the full pressure from the hydraulic ram to be applied - hopefully it will now come apart. The specialy made former is pictured below

Here is the chairman, in very pensive mood, operating the hydraulic press during one the earlier attempts to free the part

The cab roof was taken to Tyseley to be rolled into shape - pictured on its return with the original framework angleiron.

Now fitted to the cab and the whole trial mounted into position

2020

The eccentric straps have progressed but there is still some way to go before these are completed

Axle boxes all cleaned ready for refurbishment

The accomodation bogies were assembled and painted - the wheels came as castings and needed machining for axles and greasing points

Help came from the Lottery Heritage Fund with a grant for additional small tools (to reduce sharing) and lots of PPE to ensure we could make progress as soon as some restrictions were lifted

This time its Tina in full protective equipment prior to using the angle grinder - these rivets will not give up without a real fight!

Work continued to remove the rear buffer beam and frame stretcher in preparation for new steelwork being riveted in place - here Andrew is drilling a pilot hole before using the mag drill (seen in position behind him) to remove the old rivets

The finished valve bore - this was liberally coated with petroleum jelly and wooden covers fitted to ensure no deterioration

The equipmemt itself is "heritage" having been rescued from a BR workshop

The valve chest boring was completed under the supervision of contractors from Tyseley Loco Works - Stuart can be seen setting up the equipment

Work on the wheelsets was completed at South Devon Engineering - here the old tyres are being removed prior to fitting the new ones:

Painting next - the sets received 2 coats of anti-corrosive primer, 3 coats undercoat, 3 coats black gloss - and the machined parts were liberally coated in waxoyl and denso tape to ensure no rusting before we are ready to rewheel

The wheelsets arrive back at Toddington from South Devon

A generic square placeholder image with rounded corners in a figure. — The locomotive frames have all received a covering of at least one-coat undercoat on top of the anticorrosive that was applied when shotblasted - the shade of grey shown will later be replaced with a correct Venetian red!

Old Tyres off – the gas burners are being positioned around the old tyre. When the heat has been applied for a while a quick tap with a sledgehammer and the old metal falls off.

New Tyres on – the process is reversed to fit the new one – the tyre is heated and then the wheel centre dropped in – cooling and contraction makes a snug fit then a retaining system (the Gibson Ring) is fitted to make completely secure.

Extract from the South Devon Engineering Facebook page goes with the image above.

Heritage railway engineers at the South Devon Railway (SDR) know only too well that fitting new tyres to a steam locomotive is a lengthy and complex process, and it’s certainly nothing like the average tyre change at a garage!

Unlike your standard car tyre, these four to six feet diameter wheels take virtually a full day to fit each one and require the use of some heavy-duty, traditional engineering machinery. The SDR can also fit even bigger wheels well over six feet in diameter as well, and smaller ones too. Most steam locomotive have at least four large driving wheels, and often six, but sometimes eight, plus two or four wheels on ‘pony trucks’ at the front or back!

*The tyres are made from top-quality steel sourced from South Africa, which means it can take six to nine months to get the different sizes ordered and shipped to the UK.*

In the attached pictures, the re-tyring process is shown whereby the engineers place the now machined steel tyre inside a gas-powered hearth. This heats up the metal tyre ring until it’s ‘cooked’ sufficiently so that it expands enough to then drop the wheel centre into the middle of the tyre very carefully.

*The steel tyre then cools, causing it to shrink to fit the wheel centre and it is then secured by either using rivets; ‘double nip’ or Gibson ring methods later.*

2019

Axleboxes cleaned – prior to refurbishment work which will be undertaken when the newly turned axles return from work at the South Devon Railway. The axle dimensions will be measured and the axleboxes matched to the most suitable one to ensure we can obtain the maximum wear from existing components and have to replace as few as possible. The wearing surface can be seen (the curved piece) and can be re-metalled if the bronze part is not too badly worn.

This pair of new drawhook shackles were acquired, even though it will be some time before they are needed - we will take every opportunity to join in with bulk purchases of items that will be required – these shackles were part of a batch manufactured by the West Somerset Railway and bought by many loco owning groups

The loco frames and wheelsets were shot blasted and covered with an anti-corrosive coating – 50 years-worth of rust removed by thecontractors - the image shows the bare metal before at least three coats of the anti-corrosive paint was sprayed on then the volunteers moved in to start the undercoating to get the maximum protection before the marquee was removed.

Here the wheels have just been removed – designed to provide full access for the shot blasting – in this image the frames are lifted on the 50 ton jacks ready for the accommodation bogies to be placed underneath – ensuring the frames are mobile and can be shunted outside the shed - the shot blasting must be carried out in a secure area - in our case we hired a marquee - to ensure the balsting medium can be contained and not damage any other equipment.

A new pair of accommodation bogies has been manufactured to ensure that we can remain mobile while our wheels are sent away for the required work – these are the bogie frames prior to delivery – the wheels were in the machine shop at Toddington having the axle holes drilled and final assembly.

Manufacture of our new cab gets underway – the part completed structure is pictured on display at the May 2019 GWSR gala.

2018

Work begins on the Eccentric Strap manufacture – the first task was to obtain the blank metal and have the rough shapes flame cut then the precision machining can begin. An early task was to produce a drawing of the finished product and then plan how to get the blanks cut from the minimum size plate. In the background to the image are the eccentrics themselves that the straps must be machined to fit (these components are central to the timing of the way steam is admitted to the cylinders).

The old cab is dismantled, the plate work is so badly corroded that non is reusable – as many parts as possible were salvaged, especially grab handles and the angle iron framework which was treated and is being reused - the old metal platework was kept for use as templates. Though the new platework is being prepared from original drawings we are aware that the ironwork recovered is not identical to those drawings.

Heritage Lottery Grant secured – training and development projects get underway.

2017

Boiler work - once the boiler was removed from the frames and placed on the ground, work could start to get years of rust removed with a needlegun and then anti-corrosive protection applied. Volunteer Roger Tipton hard at work.

Pair of expansion links acquired – nearly new and surplus to another owning group’s requirements – half the price of new.

Non-destructive testing of the boiler undertaken - to establish detailed restoration requirements and where platework needs to be replaced. We are already aware that the lower firebox outer steel platework, some doorplate and throatplate will have to be replaced but no further unwelcome news.

2016

The Restoration Story begins, but to start you have to take everything apart!

Boiler lifted out of the frames - easier to say than do as 50 years of rust and corrosion was holding it in. The boiler was then placed on stands to allow full access to start restoration process. This image is actually of a later lift when we had to move the boiler so that building work could start at Toddington on a new welfare block for the volunteers – you will see that the boiler has now been preserved with a coating of anti-corrosive paint.

Old Cab removed – this is essential to allow the boiler to be lifted from the frames.

Smoke box removed – badly corroded and not re-usable, but the chimney was salvaged.

Old boiler tubes removed, these cannot be reused and must be removed to allow full internal inspection of the boiler, the tube plate that these are fixed to at the front of the boiler is scrap and was cut away to make tube removal easier. Wheelsets swapped – replaced with a historically accurate set from another locomotive.

Remains of Ashpan removed - the image shows the ashes from the last fire from 1963 still in evidence - the bricks in the pile were part of the "brick arch" from the firebox - the large hammer is one of the "precision tools" that was needed to remove the ashpan.

Brake rigging dismantled – all parts catalogued, cleaned and given coat of anti-corrosive - all of these items had to come off before the loco coulod be lifted off its wheels.