Page 20 GCR Class 8B
Page 20 GCR Class 8B
Solder the buffers to Buffer Mounts (32,33) then drill through
0.45 mm from the rear for the corner fixing bolts.
Remove
Foot Plate Fixing Bracket (38)
from the fret and fit
between the frames. This part should have the TABS removed
and then it can sit either above or below the TABS from the
Buffer Supports (24,25). Fitting it below will allow a deeper 10 BA
fitting to be used under the footplate.
Note
Before fitting the buffer beams permanently it is worth checking
that the valve rod guides and cylinder guides are clear and
accurately set. It is difficult to check these with the buffer beams
in place.
Fix the Front Buffer Beam in place to the frames at the same
time as the Buffer Supports noting that the buffer beam slot is
closer to the top. Check the front buffer beam is square since for
P4 the frames have a distinct bend at 4’ from the front buffer
and if the bend if different at each side the buffer will not be
central. P4 and EM modellers use the same front slot for the
frames.
Ensure the Front Buffer Beam (3) is flat and then using 0.3 mm
brass wire and a couple of clamps locate the buffers, Front Buffer
Beam Overlay (4) and Buffer Mounts (34,35) and solder carefully
into place. Trim off the 0.3 mm wire to represent the bolt heads
on the buffers.
Remove
Front Buffer Beam Draw Bar Plates (39,40)
from the
fret, clean up where needed and solder into place.
Remove
Couplers (34,35)
from the fret and solder into the front
buffer beam.
Brake Cylinder Support
Remove parts
Brake Cylinder Supports (28,29)
from the fret, drill
the smaller hole to 0.45 mm (this takes the safety chain link to
the tender) and drill the larger hole to 1.0 mm for the actuating
axle for the brakes.
Solder into place under Cab Base Support (3) and check they are
square to this base.
Fit the cast/turned/printed
Drwg. 218 Vacuum Cylinder
after all
soldering is completed.
Stephenson’s Valve Gear
Note
The Stephenson’s Valve gear consists of mirror images of parts on
the centre axle. They can be configured to work by locking them
to the centre axle or may be left to rotate freely.
Make sure that the correct parts are on the outside or the
eccentrics may become twisted. Also note that parts for the
eccentric have a ‘tab’ on them and additional fixing holes to help
in getting them soldered up. After soldering these and before
fitting into the main motion these tabs are filed to the correct
shape. High melting point solder is recommended. Brass wire 0.3
mm is used to locate the parts accurately.
For parts 185-200 drill out all the locating holes to 0.3 mm.
14. Brake Cylinder Supports
Brake Cylinder Supports (28,29)
Left frame only shown, Cab
Base and Rear Buffer
15. Valve Gear Outer Rod
Valve Rod Right Outer (187)
Outer Rod End Strips (189,190)
Outer Rod Spacer (193)
16. Valve Gear Inner Rod
Valve Rod Right Inner (188)
Inner Rod Spacer (199)
Inner Rod End Strips (195,196)
Buffer Supports (24,25)
Foot Plate Fixing
Bracket (38)
13. Front Buffer B
