Leadhills Railway logoLeadhills and Wanlockhead Railway

This loco was built by Clayton in 1978. It was one of a batch of 4 built at the same time, with 3 earmarked for export to Canada (1819A, C & D) and this particular one (1819B) simply built for stock. It was subsequently sold in 1979 to the NCB for use on the surface system of Wearmouth Colliery in Sunderland. As supplied it was set to 2’ 6” gauge and also carried a basic cab. The original livery was all over yellow. Its main function at Wearmouth was shunting long rakes of mine cars between the mine shaft and the stock yard. These rakes regularly contained 50 vehicles, grossing over 100 tons. The loco was rescued for preservation in August 1994, when it was the last piece of mechanical plant residing on about 4m of track surrounded by heaps of brick & concrete which were by then the remains of Wearmouth Colliery.

The loco was overhauled in 1996/7, being de-gauged to 2’ in the process. The cab, which although built by Clayton, was of poor design was by then in poor condition and was scrapped. The rest of the loco was in generally good condition and the restoration was mainly a case of straightening panels and repainting. Upon completion the loco was put into store as by then the owner had moved and for a time had no Railway to take it to. In August 2005 it was moved to Leadhills Railway where it ran properly for the first time in 11 years.

The loco is a standard Clayton Tunnelling type loco, the engine is a Deutz F4L912W, 4 cylinder air cooled diesel producing 55hp. The loco is not flame proof (i.e. it is unsuitable for gassy mines or tunnels) and is fitted with a 12v conventional electrical system. The engine drives a hydraulic pump which in turn drives a hydraulic motor attached to the leading worm type axle. A short prop shaft passes the drive to the trailing axle. This transmission provides full speed control from zero to about 9mph, in both directions. It also provides full braking, by retarding the loco against the engine. For parking purposes only there is a drum brake fitted to the input shaft of the trailing axle.

A feature of these locos is that the axles are quite long and the wheels can be positioned with spacer rings to set the gauge to anything from 24” to 36” simply by changing the position of the rings in front of and behind the wheel. The wheel and rings are secured to the axle by a massive nyloc nut. Sanding gear is fitted, consisting of a rocking sandbox between the wheels controlled by a lever in the cab. To allow operation on various weights of track there are 2t of steel plate ballast weights in the side boxes ahead of the leading axle and in the cab floor. With ballast, as the loco is currently, the weight is 8t, without it is 6t. With the full ballast the tractive effort is approx 2000kg.

This loco was fitted with Allen type couplings from new and will retain these at Leadhills. The only major departures from the original design by Clayton is that the loco will be provided with a compressed air system to enable it to work passenger trains as required and a spring applied, air release system will be added to the existing parking brake to aid its operation.

Although this particular loco is now 27 years old the type is still being built by Clayton, it is now available with a range of 4 and 6 cylinder engines with powers up to 78hp and also hydrokinetic transmissions and even radio remote control !