Caley Coaches
CL02/2a Building Instructions
Page 8
Section 7 Boiler and smokebox
7.1 No cut-out for the motor and gears is provided in the boiler wrapper or the brass boiler tube since
the size of cut-out required will be dependent on your motorising arrangement. To determine the
size of cut-out required, temporarily mate the footplate and cab assembly with the chassis and
measure the distance over the motor from the cab front. Also note the width required. Transfer
these measurements to the boiler tube and cut it to suit. Check the tube in position and adjust as
required.
7.2 Roll the boiler wrapper.
7.3 The two cuts in the boiler/smokebox/firebox wrapper need extended so that, when the wrapper
is wrapped round the boiler tube it is 14mm long. (i.e. extends 7mm either side of the centre line).
The two sides of the lower firebox should then be folded back as shown in the diagram. Use the
firebox front (part 26) as guide when doing this.
7.4 Now transfer the dimensions of your motor cut-out from the boiler tube to the wrapper and
remove any surplus material.
7.5 A photograph of your prototype is now essential. If you are modelling later L.M.S. or B.R. days
then the smokebox is probably riveted. If so, push out the rivets from the rear on the smokebox
outer wrapper and front (part 26) using a map tack - there are some spare rivets on the fret to
practice your technique on. Roll the smokebox wrappers and then fold back the lower portions
such that the shape of the part matches the rivet line on the back of the smokebox front (part 24).
The diagram below shows the approximate shape :-
7.6 Seam solder the wrapper to the tube at front and rear and along the edges of the cut-out. Also