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ModelWorks Pride of Penrhyn Overtype Steam Lorry
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Thursday 19 January 2006: Whilst looking for a picture of the original steering box for the steering upgrade write up I was struck by how clean and "nice" the POP looked. Being between major projects this seemed an idea time to strip POP for an overhaul and re-spray. It places the paint has become tatty practically in areas in areas of modification. Originally I used ordinary gloss paint of the cylinder and this has darken considerably due to heat. I will take the opportunity to replace this with high heat black gloss.
For some time the rear drive chains have be too slack and I
took the opportunity to adjusts to position of the back axle to correct this. I made the mistake of refitting the crankshaft before
refitting the boiler. This meant that I had to fit the boiler from below by dropping
the chassis over it. While this was easy fitting the bottom boiler
support bracket was very fiddly. Friday 3 February: Today I achieved an important
milestone when I was able to run the engine on air. I was rewarded
with a nice sooth tick-over. |
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The first task was to strip back to the chassis.
To avoid a nightmare jigsaw when it came reassembly I bagged and labeled each
part's fittings as they were removed. Removal of the crank was
simplified since I did not originally use Loctite as directed but cut keyways
instead.
In only three hours I was down to the chassis. There
being no benefit in dismantling this I set about cleaning it ready for the
re-spray. I was very grubby there being a mixture of grass, dirt and
oil. In the end I resorted to an old tooth brush and hot
detergent. After cleaning the chassis was looking a lot better, even so,
I pressed on masking and degreasing ready for spraying. I took the opportunity
to adjust the position of the back axle to remove slackness in the drive
chains. 
Wednesday 1 February: I have been steadily cleaning and painting the
removed components. I originally painted the cylinder
blue but as this has faded with the heat I decided to replace it
with high heat gloss black.
I attended
to excessive wear in the little ends pins and hope this will make the engine
run more sweetly. The cylinder bores and pistons were in excellent
condition and this is in sharp contrast to what I 