Before dismantling the cab, the electrical system was removed. The electrical system is very simple and consists of a control box with a key switch (the control box had been levered open and the key switch stolen) and four push-pull switches for lights (front, rear and cab) plus engine start. A push-button on each side of the cab operated the horn. All wiring within the cab used brass-bound armoured cable. The control box, cabling, switches, lights and horn were all removed and set aside for restoration. The large wooden tool / battery box was also removed for restoration – the lower half had partially rotted, but it was restorable.
|The upper front of the cab, showing the corrosion and buckling at the edges
|The lower rear cab panel
|Badly designed bodywork
In one place this corrosion had extended to the nut on the back of the buffer that retains the buffer spring. Also, one of the fixing bolts for each sandbox is hidden behind the buffer, so all four buffers had to be removed to enable the nut to be replaced and the sandboxes to be refurbished.
The brake gear was stripped off and was basically serviceable (but partially seized), although the pivots that take the brake blocks were a bit worn.
The suspension uses leading and trailing swinging arms pivoted around the centre of the locomotive. The pivots are approximately coincident with the sprockets that drive the wheels via chains and this ensures that the chain will not come off as the wheels go up and down. Because the drive sprockets for the front and rear chains are on the same axis, this alignment cannot be exact for both axles. By making the length of the swinging arms adjustable, the chain tension can also be set.
The axle bearings were found to be in good condition. A bronze bush spanning 180 degrees of circumference bears on the steel axle which is lubricated by an oil pad. All suspension parts were cleaned up and put back. Leaf springs are used, with the upper (largest) leaf bearing on one of the chassis girders. This allows the springs to move laterally as the length of the suspension arms is altered. The upper leaf on one of the wheels was found to be broken, but was welded back together. This spring will be monitored to see if the repair holds.
|With everything stripped, the suspension is being attended to