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13
TROUBLE SHOOTING & MAINTENANCE
On a working model of this nature, it is important to keep all
working parts well lubricated.
With constant heating up, cooling down and the stresses of hard
work, screws etc. can work loose particularly over the first few
hours of running. It is good practice to check all fixings and cylinder
screws regularly but remember, never over tighten.
STEAM LEAKS
The cylinders are fitted with '0' rings in the glands sealing both
piston and valve rods. These can be adjusted with a spanner if
steam leaks develop. They should only be tightened just enough to
stop the leak, as over tightening will affect the running of the model.
Cylinder covers are fitted with gaskets and valve chests with ’O’
rings.
A little ‘bubbling’ of oil may sometimes occur around these and is
quite normal; however, steam leaking past the gasket should be
attended to. If ‘nipping up’ retaining screws does not stop a steam