July 2009 S&T Report
article by: Andy Protherough
W/e 4th
With the assistance of Ian and his mini-digger, the Toddington
NHS ground frame is finally 'planted'. After weeks of cutting,
drilling, bolting together and the minor fettling, together with a
generous coating of the usual paints, all the fruits of this hard
work are finally coming together. Firstly the four concrete legs
are set square and level into the ground, followed by the careful
lowering of the frame into position by the mini-digger. The frame
is then bolted to each leg and again checked for level and square
before backfilling with fine ballast around each leg, topped off
with a layer of standard ballast. By the time that this ground
frame is in use, the weather will have helped to compact the
ballast to hold the frame firm.
A little further up the line, a concrete stool was dug into the
ballast on top of which has been placed an angle crank, part of the
mechanism to drive the trap point at the exit from the NHS
siding.
Work on the point at the north end of the platforms continues
with the insulated FPL stretcher bar fitted, the FPL cast
positioned on the gaugeplate and holes drilled through the
gaugeplate and the wooden sleeper beneath. Once drilled, bolts were
fitted to fasten the cast and gaugeplate to the sleeper. The
stretcher bar has been removed until after the tamping machine has
finished its work.
W/e 11th
With our workshop coach temporarily moved from behind C&W to
facilitate a stock move into the three new storage sidings in
Winchcombe yard, Monday was taken up by assisting with this
logistical nightmare. With stock moved out onto the running line,
into and beyond both platforms, the movement of long term
storage/restoration projects onto the storage sidings went on late
into the evening. Eventually everything was found a home, and our
coach parked up back in its usual place.
Tuesday again saw us back at Toddington, unfortunately on a day
fraught with the very occasional heavy downpour. In between these
it just rained! With shovels and pick at hand, ballast was removed
from under two sleepers on the NHS siding point. Once clear, the
FPL (facing point lock) casting was placed onto one sleeper, pilot
holes drilled through the casting into the sleeper, the casting
removed, 21mm holes drilled through the sleeper and the casting
bolted into place. Onto the other sleeper was placed the FPL angle
fitting and the same procedure as above followed. This angle
directs the pull/push of the lever through 90 degrees from track
side towards the FPL.
With the aid of the mini-digger, holes were dug alongside the
Stow side of the track formation from the trap point back to the
ground frame. Into each hole was placed a concrete rodding stool
complete with wheel and casting. These will be leveled and aligned
next week along with inserting the point rodding.
Final job of the day was to fit the three levers to the ground
frame. Although these were fitted back at Winchcombe to ensure a
correct fit, a small amount of re-drilling of the frame was
required to get a snug fit.
Maintenance was required during the week to signals and points
at the approach to Cheltenham Racecourse station. Firstly,
adjustments were made to detection blades on the FPL (facing point
lock) on the point outside the signal box; secondly, adjustments
were made to the tension of the signal wire to signal T4, on the
bracket at the station approach, and the length of the downrod on
signal T25 at the end of platform 1.
W/e 18th
Again at Toddington in between very heavy downpours, the day was
taken up with the leveling and alignment of the rodding stools. As
we progressed, the point rodding was pushed through each casting
and bolted to the previous section. Eventually we had a complete
run that gently snaked its way back to the ground frame. With the
trained eye of Malcolm Walker at one end, each concrete stool was
gently pushed back and forth to gain a gentle curve along its
length. A few shovels full of fine ballast was put around the foot
of each stool to ensure nothing moved before we returned next
week.
At Winchcombe, more preparation of parts for the extensive work
under Toddington 'box continues with wire brushing/cleaning and
repainting of six Repeater Block Angles and twenty ½" bolts. These
were then transported to Toddington 'box for fitting along with
other work, including the fitting of an extended top bar, vertical
angle iron, and locking tray brackets. Once these were in position
and bolted to existing frame work, then the last locking tray could
be fitted. Standing back (as far as you can in a cramped place) the
results of many hours of preparation, etc. can be seen.
W/e 25th
At Toddington, finally a noticeable landmark is reached. With
the aid of the road/railer, signal posts T4 and T20 are planted
approx. 80 meters north of the Stow road bridge. Once upright, each
post was lowered onto the four bolts protruding from the concrete
pad cast back in April. The base plate levels were adjusted with
packing pieces and bolted up tight. Scaffolding was then erected
around T4 ready for 'fitting out' to commence next week.
At the ground frame, final adjustments are made to the point
rodding before the last section is cut to length and bolted in.
Once this was achieved and given the O.K. then each stool was back
filled with ballast. Over a period of time and with some of our
usual wet summer weather, the ballast will compact around the base
of each stool to ensure no movement occurs during operation.
At Winchcombe, 50 new tappet blades purchased from Emsea of
Tewkesbury via Carl Smart are marked, punched and drilled with ½"
holes….a very time consuming job. Each is then cleaned of any burrs
and edges filed smooth to ensure clean operation within its
guide.
Templates are made from timber for setting the bolts into
concrete bases for the two dummy signals at Toddington. And the
lettering on a new 'Train Staff' sign is picked out in white on the
black background….a job for a steady hand!
W/e 1st August
Again, Tuesday saw us at Toddington, and this time on a much
drier day! Myself, Carl Smart and John Morley apply all the
fittings to the new signal T4 (Malvern side) north of Stow Road
bridge. First on is the finial, followed by the pivot casting, lamp
bracket, spec plate and signal arm. At the bottom of the post the
balance arm and weight are loosely fitted whilst the down rod is
connected between spec plate and balance arm. Once the correct
height and alignment are found, then the balance arm is firmly
bolted to the post. On removal of the scaffold tower, the ladder is
lifted into position, bolted to the top of the post and set in a
concrete pad at the base. Job done!
After a quick lunch break, the scaffold tower is transferred to
Stow side and erected around signal post T20. And we start again.
Unfortunately / fortunately (whichever way you look at it) as we
got to the point of attaching the signal arm, No.7903 Foremarke
Hall was in the process of running round its train and as she
approached our signal it was found that clearance between the two
was insufficient. Ooops!! Measurements were hastily taken and the
offending arm removed. Now what? Do we move a two ton block of
concrete 18 inches further away from the track, or make a new
block? As luck would have it, within the assortment of fittings
back at Winchcombe was a Centre Pivot Arm made for times were space
is limited. Just needs some TLC and a spot of paint.
While this was going on, Neil Carr busied himself jointing
cables run from Toddington 'box into a cabinet next to the 'E'
switch, and Malcolm Walker fitting the new FPL mechanism and
stretcher bar.
During the remainder of the week, the task of restoring and
customizing fittings for Toddington continues. Two signal lever
handles have been trimmed by approx. 5 inches. These will
eventually operate electrical relays releasing signals for trains
approaching Toddington from Broadway. The appropriate lever frame
blocks and lever guides associated with these handles have been
ground and drilled to fit the frame extension.
The above mentioned centre pivot arm has received minor repairs,
original paint removed and undercoated and glossed over four days
ready for fitting next week (hopefully reported in the next
issue)