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D7629 Cab rebuild - 2005-2006

D7629's cabs both suffer from the standard problems that afflict the later designs and to a lesser degree all 25's.

The cab roof is fibreglass, the rest is all sheet steel. Over time the seal between the fibreglass and steel perishes and water begins to enter the cab. This first corrodes the top of the cab at the interface between cab side and roof. However, the water collects under the wooden floor, gradually corroding the steel sub-floor.

The worst cab of the two on the loco had large holes under the driver's seat, and a junction box connecting the Multiple Working cables had long been removed because of the chronic corrosion.

The only remedy is a completely new floor. A number of groups have done this type of repair. I was impressed at seeing pictures from the NYMR of their repair - they had completely removed the cab. As the floor was so bad on D7629 I elected to follow the same course. Once the cab was removed, I contracted a welder (Dave Hewson), to undertake the platework.

In September 2005 the cutting out and welding are substantially complete. Pictures below show that progress.

Another update and set of pictures were all taken on Feb 10 2006. The cab was successfully lifted back onto the loco and re-united in one very successful lift.

On 18th and 19th Feb 2006 many of the air pipes were reconnected. The cold winter weather is not conducive for painting, so I've been progressing the reconnection of the air and electrical systems.

 

This view shows the completely new steel above the right-hand window.

The old steel was completely corroded with large holes. It has been cut out and new piece cut to fit.

Both side windows had areas corroded in the bottom leading corner - caused by water entering via the window runner.

Again the old sections were removed and new pieces cut and let into the existing bodywork. These pieces were especially complex shapes.

This view shows the new steel along the sides and on the corner of the cab.

The other side leading corner, beside the driver's brake valves.

Below the driver's side, extensive corrosion had occurred behind the frame of the cab itself and at the bottom of the bodyside section.

The rainstrip is removed both sides. It does not sit directly on the steel, instead the steel is built-up with filler.

I have no real option but to do the same again to refit the rainstrip.

View showing the new platework across the cab front.

Inside view showing new platework and joists that reside under the secondman's seat.

There was one piece of cab floor that was retained - a small section in the middle of the cab to the front. It is in Red on this picture.

Another view of the cab interior showing new platework welded in.

The joist at the rear of the cab has also been replaced. It had come out in a number of small pieces (and a lot of rusty dust!). Brake pipes and control cabling can be seen.

View of the new section - Secondman side.

The handbrake wheel can be seen, along with the hole that allows the linkage to reach the mechanism.

A second view of the rear section of the cab.

Driver's position. New platework and the control cables reeled-up and hung clear of the work.

Some wiring will be replaced, but most is in very good condition.

New cable routes and trunking will be used.

Inside detail showing the new top section of window - secondman side.

The fibreglass roof section can be seen, as well as the simple framing for the roof.

View of new cab floor, showing hole for Handbrake linkage

Beyond the hole can be seen the one last original piece of floor plate.

Detail showing the new section atop the secondman's window and fibregalss roof.

The roof section is undercoated. It will be sanded and topcoat applied.

View showing the main locomotive superstructure.

The lower light green band has received it's first topcoat. The upper band - destined to be Brunswick Green - has yet to be sanded, though the second undercoat is complete. The area where the cab joins the body was badly corroded but this cas been carefully cleaned and primed and now undercoat and topcoat are applied here before fitting of a rubber seal.

Detail showing the disused steam pipe which has received a new and stronger wrapping.

The steam pipe at the other end of the loco had been removed when 25279 last visited Derby works and had that cab removed for attention to corrosion.

The bodyside has been primed, filler applied, sanded and undercoated.

The welding for the new sections of bodyside can not now be seen.

This view shows the two undercoats for the two green shades. Here both have received a second undercoat. Since this picture was taken, the light green topcoat has been applied and sanded and I've just applied the first coat of Brunswick green to the top section. Progress at last!

This view shows the bottom of the conduit containing the AWS cables.

The pipe has bad corrosion inside it and the wires had to be cut nearly flush where the cables emerge.

The original control wiring has clearly been designed to facilitate cab removal - as have the air brake pipes. However the BR-fitted AWS wiring is not designed fo facilitate removal of the cab and extensive rewiring for the AWS will have to be undertaken.

View showing MW cables.

Both these cables formerly joined in a junction box underneath the cab - driver's side. The corrosion had seen the failure of this box and it's removal long ago. Since then the cables have been taped-up and left under the cab. These will require extensive work as the old cables are badly damaged through age.

Final view showing the air brake connections that will be remade when the cab is returned to the locomotive.

Cab prior to the lift operation

View of inside of cab prior to lift

Photo by Rub Cuss

D7629 outside for the first time since the majority of the paintwork was completed.

Photo by Rub Cuss

The loco is outside the No1 shed at Ruddington for the first time since repaint.

The bulkhead ready to recive the cab

Photo by Rub Cuss

Cab ready to lift

Photo by Rub Cuss

Cab ready to lift

Photo by Rub Cuss

Straps are applied to the cab. The adjustable strap on the front emables us to control the pitch of the cab and ensure it is level.

Photo by Rub Cuss

Ensuring the strap does not damage the fibreglass horn pod

Photo by Rub Cuss

Mark Hellebeut on the GCRN's workshop travelling crane

Photo by Rub Cuss

Mark Whitcombe ensures that the straps are set-up for the lift

Photo by Rub Cuss

The cab ready to lift

Photo by Rub Cuss

Cab ready to lift

Photo by Rub Cuss

Cab ready to lift

Photo by Rub Cuss

Mark Fowler connecting the straps to the hoist

Photo by Rub Cuss

View of the original headcode box. This will be restored to working order.

Photo by Rub Cuss

The cab is strapped, ready to lift

The front strap is adjustable to control the level of the cab which is front-heavy.

Ready to lift

Photo by Rub Cuss

Mark Fowler ensures the cab lifts as it should and steadies it.

Photo by Rub Cuss

The cab is manouvred down the No1 shop to the waiting locomotive

Photo by Rub Cuss

Mark Whitcombe steadies the cab as it's moved into place inside Ruddington Locomotive Workshop

Photo by Rub Cuss

Mark Whitcombe (L) and Mark Fowler(R), ensure the cab is lifted clear of the frames

Photo by Rub Cuss

The cab just clears the handbrake linkage

Photo by Rub Cuss

Mark Fowler checks the handbrake linkage clearance. The measurements for this aperture were accurate to the half-inch!

Photo by Rub Cuss

View of the handbrake linkage and the aperture in the cab floor

Photo by Rub Cuss

Mark Fowler checks the clearance on the handbrake linkage while Mark Whitcombe steadies the cab.

The handbrake linkage has a very precise location within the cab and through the floor aperture. As the cab is lowered, it must be moved back and forth to clear this linkage.

The cab located on the frames

Photo by Rub Cuss

Mark Hellebeut checks the location of the cab

Photo by Rub Cuss

View that has not been possible for some time!

Photo by Rub Cuss

The crew! L-R;

Mark Hellebeut, Mark Fowler (Loco owner), Mark Whitcombe, Rob Cuss, Alan Watson

Photo by Rub Cuss

Sincere thanks to the whole team on the day!

Mark Fowler and Mark Hellebeut check the location of the cab.

Photo by Rub Cuss

To ensure the cab is located fully, Mark Hellebut gives it a little "gentle encouragement"!!!!

Photo by Rub Cuss

A little more encouragement...

Photo by Rub Cuss

Cab in-place on the loco

Culmination of many months of work!

Cab in-place on the loco

Cab in-place on the loco

Cab in-place on the loco

Cab in-place on the loco

Cab in-place on the loco

Air receivers

These will be tested before the loco resumes service.

Air pipes newly re-connected on 19th Feb 2006

Air pipes newly re-connected on 19th Feb 2006

The view of things to come...

The worklight lights-up the cab and makes the loco come to life.

AWS connections ready to be remade

06 March 2006

Holes made for AWS connections.

Steam heat through pipe is also visible

Formerly, the AWS cables were routed through the floor in four places.

I've chosen to completly re-route these to use only two holes through the floor.

06 March 2006

New AWS air connection

06 March 2006

OK - Not strictly cab!

Bodyside panels with first topcoat.

06 March 2006

The AWS/Change-End switch wiring is being re-made

06 March 2006

Photo showing the completed air pipework and new cable route.

This trunking is temporary.

06 March 2006

Cables are now back into the bulkhead terminal block, though yet to be connected as of March 06th 2006.

06 March 2006

Controller pedestal wiring.

Compare this with the rolled-up cabling as the cab floor was replaced!

06 March 2006

AWS and Cab heater wiring laid-out ready for reconnection.

The AWS cabling had to be cut to remove the cab owning to the poor route BR had used.

06 March 2006

Bulkhead box again. Re-making these connections is the next job on the list.

06 March 2006

General view of the replaced pipework and cabling.

This will allow the multiple-working cables to be re-made and re-terminated, fixing the MW for the first time since the loco was at Llangollen.

06 March 2006

Controller pedestal detail

06 March 2006

DSD and cab heater cabling awaiting routing and re-connection.

06 March 2006

The bulkhead electrical connection junction box is seen with cab cabling in the process of being re-connected

11 March 2006

The new cable conduit has really cleaned-up the cab floor. I've used modern plastic trunking that is temperature and fluids rated.

11 March 2006

View of the driver's desk with the cables organisaed

11 March 2006

The new trunking and the cables bundled and connected into the junction box on the bulkhead.

11 March 2006

Another look at the cab floor, clear and tidy with the cabling in the trunking.

11 March 2006

Red letter day!

Testing the lighting circuits - the red tail lamp works!

11 March 2006

It lives!

The red and while lamps lit, with headcode illumination.

A major step forward made as the electrical systems are tested for the first time.

11 March 2006

 

 

This page last updated: 13 March 2006