The Sir Nigel Gresley Locomotive Trust LtdSubscribe to 60007

Registered Charity Nº1079591

OVERHAUL 2015 - 2019

All the overhaul photos may be found here.

Sir Nigel Gresley is now out of traffic for overhaul. This will probably take three 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.

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Notes from information supplied by Darrin Crone, Locomotive Engineer.

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From October 2018.

8 October 2018

The tender tank had steel plate inserted and welded in position this week. This fills the holes in the water filler space side sheet. Work continues on fitting new plate to the bulkhead that separates the coal space from the water filer space. Now it's cooler in the workshop on top of the tender productivity is returning to normal.

More work has been done on the front of the tender with the removal of the rivets holding the bottom plate on to the original 1928 side angles. We also had a visit from a steel supplier to measure up, as they have been asked to quote for the supply of new plate. Our normal suppliers are on Teesside, but for large pieces of plate we would incur delivery charges.

Work has continued this week on the tender frames with needle gunning of the frame plates complete, attention is now concentrated on the dragboxes. The frames are now being closely inspected so that a refurbishment programme can be planned. The measurement of the frames, axleboxes, wheelsets and bearings continued this week. Cleaning and painting of the wheelsets continues.

The neck bushes were removed from the tender vacuum brake cylinders and a start has been made on the manufacture of new ones.

Work continues on the replacement of some of the smaller diameter air system pipework, replacing it with pipe more resistant to damage. The problem is that to identify the existing pipework type, fittings have to be de-soldered and removed, though our volunteer leading this job is adept at identifying pipe types by weight.

Work has also progressed on the manufacture of new pipe clamps for the lubrication pipes and the atomisers have been retrieved from store for refurbishment. The atomisers are in the process of being dismantled and the internals cleaned out and inspected.

We now have all six coupled axleboxes on site and preparation work for their refitting in underway. The axleboxes have been cleaned down, and a start has been made in the manufacture and fitting of the locking screws for the thrusts. The brackets that fit in the bottom of the axleboxes, on top of which the underkeep oil baths fit, were tried in this week. They have to be fitted before the axleboxes go into the frames. More work is required on fitting these. The brackets have a large pin passing through them and the axlebox, from which the main spring is fastened. These pins wear and eventually require replacement. We now have a full serviceable set as where required new have been made at York.

The steam pipes from the supeheater header to the cylinders are to be pressure tested. This week the faces of the pipe flanges were lapped with a tool made at York and the lens rings cleaned up.

The front coupling hook was fitted with a lock nut this week after being made from one of the old nuts, and the cotter to the end of the hook shaft was fitted. The cotter again being original but requiring modification to fit the new arrangement.

New plate welded in to the rear left side of the tender. 3 October 2018
Photograph: Darrin Crone

New welded plate

The atomisers are stripped and inspected. The atomisers mix boiler steam with oil before it enters the cylinders and steam chests. 3 October 2018
Photograph: Darrin Crone

The atomisers

The tender rear dragbox also forms the rear bufferbeam. As with the front dragbox a lot of surface area in a complex casting to strip down. 4 October 2018
Photograph: Trevor Camp/SNGLT

Tender rear dragbox

Work continues on stripping, cleaning and painting the tender wheelsets. 4 October 2018
Photograph: Trevor Camp/SNGLT

Tender wheelsets

The tender wheelsets have plates riveted on their insides. 4 October 2018
Photograph: Peter Brackstone

Tender wheelsets

The front hook spring arrangement as Gresley intended it to be. 6 October 2018
Photograph: Darrin Crone

The front hook spring

The steam pipes and lens ring sealing faces being prepared for testing. 6 October 2018
Photograph: Darrin Crone

Steam pipes & lens ring

1 October 2018

The tender tank progresses with steel obtained and being fitted to the removed wasted sections in the water filler space. The floor in this space has been needle gunned and it will be treated before painting with a corrosion inhibitor.

At the front of the tender a large section of steel that was holed has been removed. The inside of the tank behind the cutout has been chipped and descaled, and has revealed a number of holes beneath the sealant lining. As elsewhere on the tank it appears corrosion from the outside is responsible. The bottom plate in front of the cutout has been descaled around the corners to identify where the old plate should be cut out and where new plate can be welded in. Measurements have been taken and a shopping list of plate is being put together.

The cab piping continues to be worked on with our CME identifying more piping changes he requires. Attention has also moved to the steel piping in the tender frames as all the steam heat pipework is to be replaced, as well as wasted steel vacuum brake piping. A number of propriety pipe brackets and clamps have been obtained to provide support to the smaller lubrication pipework between the frames. Previously the pipes have been wrapped with rubber to protect them from vibration damage in steel clamps.

The superheater has now been "unboxed" with all the sealing plates and bungs removed. After drying out, the sealing faces required cleaning of all sealant, gasket and surface corrosion. The same was done to the middle and end blank cover, and these were reassembled on the header for transport to Llangollen. The element holes have been cleaned out and all the bright surfaces given a smear of grease. The end threaded plug holes have been cleaned and the plugs fitted.

The front centre bufferbeam section of streamlined casing was finally fitted this week and the reconditioned drawhook fitted by Bob Shearman. The new springs were also fitted. A new spacer for the securing nuts was machined at York this week, the old one being not to drawing. The front shackle was detail cleaned and di-penned this week with no defects found. It has previously been dimensionally checked to ensure it is not below scrapping size. It would be a shame to have to replace it as it is a nice old fashioned BR marked type.

The loco fitted bogie sidebearers were finish reamed in position this week, and pinned up with silver steel dowels. The bottom plates have now been marked up with the machining that they require.

All except one of the coupled axleboxes have now been returned to York. The outstanding axlebox required a little further work. I visited Grosmont this week to view the last box in progress and to inspect the other three completed ones. The axleboxes at York have been put under the wheelsdrop crane ready for fitting. The dressing of the driving wheelset outside crankpins is being continued.

Invitations have been invited this week for the large bronze coupling rod and outside connecting rod bearings, in addition to the small end bearings. The patterns we have for these bearings were identified and have been added to our parts control system.

The finishing of the valve rings was completed this week. They are now ready for fitting to the valve heads. 25 September 2018
Photograph: Peter Brackstone

Valve rings

Incredibly we are still finding corners of the tender frames that need further scale and corrosion removing. 25 September 2018
Photograph: Peter Brackstone

Scale, corrosion removed

The left coupled wheel axleboxes positioned under the wheeldrop crane. They require some external cleaning and then will be fitted. 29 September 2018
Photograph: Darrin Crone

Left coupled axleboxes

The pipework from under the drivers position and along the frames has been extensively reorganised. 29 September 2018
Photograph: Darrin Crone


The superheater pressure tested and sealing parts removed. Ready to be dispatched to join the boiler. 29 September 2018
Photograph: Darrin Crone

Superheater tested

The section of plate removed from the front of the boiler. 29 September 2018
Photograph: Darrin Crone

Plate removed from boiler

In the front corner of the tender are curved brackets that indicate the profile of the original 1928 tender sides. 29 September 2018
Photograph: Darrin Crone

Curved brackets
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From January to March 2016.
From April to June 2016.
From July to September 2016.
From October to December 2016
From January to March 2017.
From April to June 2017.
From July to September 2017.
From October to December 2017.
From January to March 2018.
From April to June 2018.
From July to September 2018.

Page updated on Monday, 8 October 2018   

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