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Construction

Final combined frame stay in place

25/12/2017

Working right up until the Christmas break, the team at Darlington Locomotive Works took delivery of and installed the final combined frame stay and spring bracket assembly.  All photos by David Elliott.

Bearing up….

14/12/201715/12/2017

Supervised by Mark Leatherland from Timken, the team at Darlington Locomotive Works pressed the roller bearings on to the crank axle.  The process required the use of an induction heater for the bearings.

Most of Tornado’s roller bearings were fitted by the wheelset assembler at the same time as the wheels were pressed on. For Prince of Wales we have decided to assemble the bearings, axles and axle/cannonboxes ourselves as the plan is to fit the completed axle/axlebox and cannonbox assemblies to the frames before the wheels are pressed on. This makes the setting of the coupled axles much easier as the distance between the axles (which is a critical measurement for a smooth running) can be measured directly – this is not easy when the wheels are on.

The first bearings were fitted on 13th December to the crank axle. Having checked that the dimensions of the axle ends and the various spacer and thrust rings are correct, each component is heated to 110 degrees C using our new SKF bearing heater and slid onto the axle in turn. The axle is typically 0.004″ greater in diameter than holes in the rings and bearings, so as the components cool, they grip the axle. The problem is that if the outside edge of the ring or bearing cools and grips first, the the item will no longer be tight up against its neighbour as it shrinks on cooling. To overcome this we use our 50 tonne jack with various bespoke adapters to press each ring and bearing as it is fitted. The pressure is released once the component has cooled down.

It is a requirement of Railway Group Standards that work on roller bearings is overseen by a qualified bearing specialist which we do not have, so the operation was attended by by Timken Service Engineer Mark Leatherland who will provide suitable paperwork conferring acceptance of our work.

The next stage is to machine the adjustment rings that set the end float of the bearings, after which the axleboxes can be fitted.

    

The roller bearing fitting rig – David Elliott

The induction heater for the bearings – David Elliott

Bill Drumm applies grease – David Elliott

Ian Matthews and Bill Drumm  with their handiwork – David Elliott

The bearings in place, wrapped in cling film to keep them fresh! – David Elliott

Going green!

05/12/2017

As assembly of No. 2007 Prince of Wales accelerates, some components need to be finish-painted in topcoat, particularly those that will be inaccessible once the locomotive is fully assembled; one such is the wheel hub behind the Cartazzi axleboxes.

Ian Matthews’ handiwork on the Cartazzi wheelset – David Elliott

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The P2 Steam Locomotive Company
Darlington Locomotive Works
Hopetown Lane
Darlington
DL3 6RQ

01325 460163

Darlington Locomotive Works – The Works are open to the public on the first and third Saturday of each month, the latter a day that coincides with NELPG also opening their doors to visitors – 11:00hrs to 16:00hrs. NOTE, DUE TO THE CURRENT SITUATION, THE WORKS ARE CLOSED UNTIL FURTHER NOTICE.

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Gresley P2 2007@Gresley_P2_2007·
16 Jan

Do you shop with Amazon ?

Amazon donates 0.5% of the net purchase price to The A1 Steam Locomotive Trust, at no extra cost to yourself.

Click here to use Amazon Smile today http://smile.amazon.co.uk/ch/1022834-0.

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Gresley P2 2007@Gresley_P2_2007·
11 Jan

It's Mikado Monday !

The construction of the pony truck has made significant progress over the past few months at several sites across the UK.

Click here for more information and to help us gallop past the finish line: https://bit.ly/3bAVIeK

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Gresley P2 2007@Gresley_P2_2007·
8 Jan

Progress continues to be made on the frames and tender frames. Read more here : http://ow.ly/crjd30rqXka

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