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OVERHAUL 2015 - 2020

All the overhaul photos may be found here.

Sir Nigel Gresley is now out of traffic for overhaul. This will probably take four years and cost about £750,000. If you would like to make a donation towards this overhaul please click on one of the the donate buttons.

To donate via PayPal (incl. credit or debit card):Donate         To donate by 'phone: Donate

Notes from information supplied by Darrin Crone, Locomotive Engineer.

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From July 2019.

12 July 2019

The coach has been visited by our CME and myself during the last week in June. We were impressed by the quality of the work we saw at CTMS, who are the contractors carrying out the work. One side of the coach has been extensively re-skinned while the other side has been stripped back to metal. This gives a striking before and after view. It has also shown how much more extensive is the work required to the coach skin and structure.

Meanwhile at Llangollen progress has slowed due to difficulties with sealing the superheater header. It is essential that the header makes a good seal on to the front tubeplate as when the elements are fitted they are only removable with a gas axe. So, the header has been plugged and mounted in the smokebox, and hydraulic-ed. Under test a leak was found. The joint is now being worked on to ensure a reliable seal is achieved. The job is made more awkward as the smokebox is in place and the header has to be angled to be put in or removed. A job made more difficult by all the plugs protruding from the header. The smokebox also makes accessing the joint more difficul.

The tender bearings have now all been remetalled and machined at contractors. The bearings are now at York and are being scraped to their journals. LNER drawings show the back of the tender axleboxes were sealed against the ingress of contamination with a rubber formed seal that was clamped under a plate on the back of the axlebox and ran on the axle near the face of the wheel. These are absent from our axleboxes. We plan to replace a form of sealing, though made from flat sheet. Measurements of the required seal have been taken and quotes for the material will now be obtained.

The last of the tender spring hanger bolts have now been collected from contractors where they have been refurbished.

The steam heat valve that failed during the boiler test at Llangollen, and the patterns for a new valve body, and the new valve guide have now been sent to the foundry.

The tender pipework continues to make progress with a way through found the tender frames for the main air supply run from the air pump to the tender top tanks. This pipe is larger than the other air pipes so this has been a challenge and will require some difficult forming. The pipe previously ran through the cab and along the corridor. Elsewhere the OTMR sensors have been removed from the sensor box and it has been stripped back to metal. The box gland plate was removed, a new seal made and has been sealed in place.

The cab pipework has now been removed leaving the cab floor clear. This has allowed the floor to be finish painted. The reverser stand has also been removed so that there is no chance of damage during the fitting of the boiler. The pipework will also be left out until after the fitting of the boiler to prevent possible damage. So the back of the loco is looking like it did a couple of years ago.

The new cotters for the tender vestibule connection support rods have now been finished. The bolts used to connect the rods to the end face of the coach connection have been machined and the old nuts will be reused.

All of the new tender hornstay bolts have been machined to correct diameter, lathe threaded and the ends parted to length. They only now require drilling for split pins. The tender frames are now receiving black gloss.

All the new bushes for the lower tender pull rods have been manufactured and a number now fitted. The tender handbrake refurbishment is now being specified. The middle tender vacuum brake cylinder bracket has been machined and is temporarily mounted in position. Work has begun on accurately aligning it with the outer brackets and then the mounting holes will be drilled through.

The loco brake hangers have previously had their old bushes removed and the worn faces where the blocks are mounted rebuild with weld. New material has now been obtained for rebushing the large bottom holes. The trailing right hanger has been put up on the loco pin and it is being examined for deformation.

The GSMR enclosure has now been painted to blue gloss as part of the electrical systems overhaul. The new TPWS junction box at the front of the tender frames has now been fitted.

Work continues on the fitting of the new tender front platework. New steel has now been delivered to York. The front section being replaced is formed of four plates and two of these are now in position and being trimmed and drilled for fastening to existing structure. The staging at the rear of the tender has now been moved to the right hand side of the tank to allow the grinding off, of the remains of the streamlining where it was welded to the top of the original 1928 tender.

The drop grate operating mechanism components have been retrieved from store. They were given a clean, fitted in place and examined. There is a plain bronze thrust bearing that will have to be replaced as it is worn completely through.

The cods mouth operating mechanism has now been moved in to the open, and is now stood on trestles in front of the loco. It is now being cleaned and examined.

New pins have now been fitted to the lifting arms and the die blocks have been machined to accept the new pins. The bearing faces in the lifting arms required a little easing and this has now been completed.

The fitting of the new slidebar bolts continues with all the hole gauging now complete. As all the final bolt sizes are now known they are being machined and fitted.

A new, reproduction builders plate has been donated by Mr Suter of York, who handed it over personally at York. It looks superb and it is planned to mount it on the driver's cab side. Anybody wanting to donate a new fireman's side plate?.

The cab floor has been stripped out to allow the structure to be finish painted. 25 June 2019
Photograph: Peter Brackstone

The cab floor

Pallets loaded with tender springs return from refurbishment on 25 June 2019
Photograph: Peter Brackstone


The coach stripped back to metal prior to skin repairs at the workshops of CTMS. 26 June 2019
Photograph: Richard Swales

Coach stripped to metal

The coach side that has been repaired. 26 June 2019
Photograph: Richard Swales

Repaired coach side

.Components from the drop grate operating mechanism awaiting painting on 3 July 2019
Photograph: Peter Brackstone

Drop grate components
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