Updated 20th July
60 CM GAUGE ARN JUNG No 3175
An artistic view of my Jung, number 3175.
A catalogue picture by kind permission of Chris Walker
My professional interest centres around miniature railway equipment but my private interests range over a much wider portfolio of things mechanical. My Jung, is one of them.
My interest in locomotives is not only in miniatures but also narrow gauge. Over the years my son and I have collected various items of rolling stock in 2` and 2` 6" gauges and hoped one day to acquire a locomotive which we could restore to running order. I bought a "Brigadelok" 0-8-0 Henschel but due to her condition and the weight which was close to 12 tons, we felt it too heavy for what we wanted. We hoped one day we might be able to locate something smaller and our patience paid off! One of our contacts made us aware of such an engine tucked away in Scotland, and its owner was approached, and after careful negotiations a deal was agreed, I was now the proud owner of a delightful little engine!
My loco was built in Germany in 1921 and is an "Arn Jung" work number 3175. she is shown in their works list as a type Bn2t, Jung, as with other German builders, had a code for all their locomotives and in this example means B= 0-4-0, n =not superheated, 2=2X cylinders, and t=tank engine. She is a well tank, meaning her water supply is carried in tanks built into her frames. Her cylinders are slide valve and the bore is 168mm ,originally 165mm when new making her 30 HP. Valve gear is Walchaerts and boiler pressure is 12 bar(170 psi) and her weight in working order is about 5 1/2 tons.
She may have been supplied by "Ducroo and Brauns" who were well known builders and suppliers of steam locomotives, in Hollan, although records indicate she was ordered by agents in Berlin. She was shipped out to Argentina where she spent her working life, of which most of it was working in a large wood mill, where wood waste was used to fire her. She was imported into Britain about 5 years ago and was eventually put into dry storage by its previous owner, who intended to restore her. What appealed to us was her overall condition and that she was 99% complete apart from a whistle and pressure gauge. She was brought her back from Scotland by Steve , of Richards Engineering , who regularly moves locomotive and railway equipment around the country. We travelled up with Steve and it was a two day trip, and by Friday late evening she was safely unloaded at her new home.
We will soon be removing her boiler and letting our boiler inspector carry out a survey and report to see what work needs to be carried out to make her steam-worthy again. The wheel sets will be sent off for re-tiring but the rest of her restoration we intend to do ourselves. We would be more than happy to learn of any information about our engine and would also like to acquire a roof mounted whistle with the operating pin in the top. We will show pictures as the project progresses.
A rear view of our type of Jung from an early sales brochure, from the Chris Walker collection.
A rare advertisement pamphlet from the 20s showing Jung locomotives hard at work. Also from the Chris Walker, of TRACKSIDE PUBLICATIONS.
Here we see the loco loaded and leaving for the long journey to its new home, some 400 mile away! Note the smoke coming from the chimney, we could not resist setting fire to some old rags to to create some smoke ,just for fun!
A close up of the valve gear which is in exceptional condition, requiring very little work. The wheels however are badly grooved and will probably need to have new tyres.
A nice view showing her well balanced design. Her chimney is believed to be from an O & K but was fitted to her in Argentina. We may replace it with a stove pipe type, which were also fitted.
THE RESTORATION PROJECT
Now we have had an opportunity to access the Jung , we have drawn up a program for the dismantling of the loco. The first job was to remove all the boiler fittings and plate work so as the boiler could be removed from the frames for examination by a boiler inspector. Out of over 100 bolts only a few required oxy cutting equipment to assist their removal.
Dan and I hard at work in the scorching sun carefully numbering, and removing all plate work and fittings.
At last all boiler cladding removed and time for a break.
The boiler removed from its frames with our 2.5 ton fork truck . The next job was to remove the smoke box from the boiler barrel.
The chassis now looks quite small with the boiler and plate work removed.
The boiler now ready for its examination and report. We have decided to send the boiler out to a specialist and we would do all the remaining work on the loco ourselves.
Once to boiler had been removed we discovered the builders name stamped into the rear axle.
At last our Jung is now in our new works and soon we will dismantle the valve gear and coupling rods. The wheels can then be dropped and sent away for re-profiling. The frames will then be assessed a a scope of work prepared.
Last Friday, the 10th October, we thought we might take a look at the pistons and slide valves to see what condition they were in. At some stage of its working life it appears both cross heads had struck something resulting in the piston rods becoming distorted. We had quite a task to remove the tapered cotters from the crossheads. Here we see one of the removed pistons, after removal we were pleased to find the bores were not pitted. Once they have been measured we hope they will clean up by honing. The bore was originally 165 mm but now its near 168mm.
BOILER AT HUNSLET ENGINE COMPANY
After considering many options we decided to send the boiler to Graham Lees Hunslet Engine Company. The boiler was collected about 3 weeks ago were it would have the firebox, tubes and tube plate removed and the barrel and outer firebox wrapper shot blasted so the boilers condition could be assessed. Monday 11th of August we were invited by Graham to view the boiler and discuss the next stage of work. On arrival at Statfold Barn, where Hunslet Engine Company is based, we meet Graham and his boiler smiths and were shown round the works, very impressive!
We were then shown our boiler and we were astonished at the progress that had been made in such a short space of time. Not only had the fire box ,tube plate, tubes, foundation ring and stays been carefully removed , the boiler had been thoroughly examined, but a schedule of work had been drawn up along with a quote for completion of work. The work will be carried out over the next 8 to 10 weeks.
Here we see the boiler having the remaining stays removed.
The barrel has wasted badly outside the tube plate area in the smoke box. The front of the barrel will have a ring fitted to accept the new smoke box which Hunslets will also make, using some of the original parts like the door, hinges and frame brackets.
The state of the fire box is far worse than we all expected. Some in its time in Argentina, the tube plate was cut out a new plate inserted and welded from inside the box !
View from the fire hole side. The new box will be a welded construction.
On a recent visit to Hunslet Engine works we were impressed to see the the level of quality and progress that had been made. On the outer firebox wrapper all the old stay holes had new ferrules weld in the bring the stays back to there original size.
Here we can see the new palm stays next the the best of the three old ones! These stays tie the front of the firebox to the bottom of the barrel internally.
On Tuesday 11th we visited Hunslet Steam Co, after being invited by Graham Lee to have a go at some riveting on our boiler. We spent all morning being instructed by the Hunslet team , and under the watchful eye or Richard , we helped rivet the tube plate. Having had a brief introduction into this skill we can now appreciate the immense amount of highly skilled work which goes into the rebuilding of a boiler.
The new firebox and foundation has been fitted since our last visit back in October, and the workmanship is 1st class. The next job will be fitting the side stays.
Here we see a white hot rivet being closed with pneumatic riveting
A finished row of rivets on the tube plate all looking very regimental.
Back at our works we have been spending the cold, wet evenings dismantling the valve gear and cylinders. The left hand side is now stripped and all parts carefully packed away.
The left hand cylinder block stripped and lightly cleaned. On initial inspection the block is in excellent condition and the bore looks like a light honing will be all it needs.
Early days yet, but we could not resist getting the pattern made for the works plate. A resin mould was made from an original plate and new numbers were hand made and fitted to suit our locos number and date.
The safety valves were stripped and as can be seen in the picture one of the bolting lugs had been broken many years ago. A repair had been carried out using brazing, and although it had worked like this is would not pass current boiler safety rules and a new one would be needed. most of the internal parts of the valve will also be re-made.
After careful consideration we decided on pattern for new safety valve casings rather than trying to find some from another loco. Castings can also be supplied to other owners of similar type German locos to help recover some of the pattern costs.
After stripping down the clacks we could see they would need a lot of attention to make them usable again. The two spindles for the clack shut of valves are scrap and I would have to machine new ones along with all the other parts. We see one of the new screw cut phosphor bronze spindles I made over the last few evenings at work.
The clack bodies were soaked in the pickle tank to remove all the years of scale and other debris prior to polishing. The clack on the right has just been polished and looks like new.
The finished spindles and there new housings and gland packers shields. The tools for machining the male and female 6 TPI threads were all hand ground and I am very pleased with the results. I am now working on the clack bodies themselves and these are proving very tricky.
Here are the clack valve nearing completion and these will soon be on the way to Hunslets to be re-united with the boiler!
View of the main frames taken earlier in the year showing stages in painting after extensive refurbishment including the manufacture of a new front buffer beam.
The cylinder assembly showing the new piston rod, brasses, slide bar, stuffing gland and pins along with a lot of tedious setting up.
As can be seen from the original valve guide heavy weld repairs have been carried out to both sides of the locomotive, probably due to derailments. A new pattern has been produced along with castings to suit.
Here we see the new stuffing glands nearing completion, it was necessary to make new ones as one was split and the other was from a different loco.
We have for some time now benefitted from the help of our two volunteers, John and Pete. Both are retired and come down most Thursdays to help on projects. Here we see them both fitting the newly made siphon pipe connecting the two well tanks. Soon they will be helping to refit the tank cover.
At long last the wheels are reunited with the chassis, now it is starting to look like an engine.
NORTH GLOUCESTERSHIRE NARROW GAUGE RAILWAY
This delightful 2 foot gauge line is situated at Toddington station on the G & W R A .The railway is owned and operated by a small group of dedicated enthusiasts. We joined into this railway as volunteers and our loco will live here when it is restored. This railway has a Jung 0-4-0 locomotive of 1906 and is named "Justine" Dan and I have enjoyed several firing turns on this loco.
Justine backing her train into the carriage shed after a days running.
WANTED
There are a number of items we will need to put the finishing touches to our loco, and a lamp is one of them .Chris was able to find an early picture of the type we are looking for.
