News / Chronicle
April 2018
Because of the special construction of
the Slavia motor in the MD2 no. 12005 the dismounting of
pistons and piston rods was only possible from the bottom side.
That means the motor had to be lifted and its bottom cover plate
hat to be opened for reaching the piston rod nuts, a not very
service friendly construction. But with the help of a fitting
chain pull the stripping was laborious but not difficult. Especially
the piston from the cracked liner looked critical but after cleaning
he showed a good condition.
The connection chain
between the loco axles looked cleaned like a new one.
March 2018
In a first step the MD2 no. 12005
should made workable with fairly low effort. For this motor and
gearbox - both fixed during long stay - had to be released. The
general construction of Montania locos is from today's perspective
service friendly but only, when all parts are moveable like in
normal use. If not, it could occur that not all screws could be
reached by the wrench.
To push out the pistons
from the liners was not difficult with the help of a 10mm thick
steel plate and some patience. The fact that both liners moved
together connected by the crankshaft when one of them was pressed
prevented damages of the motor. The sleeves were less perished
so that the not cracked one was useable after honing. The other
one must be rebuilded from new material (sphere cast).
Together
with the old oil a few liters of water left the motor. It was
ecpected. But after that a glittering layer of ice devided the
case. That was not expected. The valve guide were o.k. but it
was not easy to remove the valves. The outlet valves were corroded
and had to be rebuilt.
The inner parts of the gearbox
showed some signs of rust because a stupid guy dismounted the
upper eyehole plate an left the hole open. But the plate remained
at least. Both of the clutch cones were fixed by rust in its housings.
After dismounting the main shaft they could be released by some
powerful hits to the right points. The roller bearings were in
good condition and after mounting the gearbox now waits to get
on duty
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