If welding, painting are simultaneously carried out during rainwater
testing rain water testing will be compromised.
In the Steel foundry(picture above) quality issues of cast products, need to be discussed., it was told that use of
Zircon sand, prevention of sand erosion and use of special refractory material
at places where cross section changes helps in improving the quality of
the castings.
In some locos, axle
guide link post weld failure can occur. Hence quality welding is required.
TM
shop should be visited to see that Mica ( of PPCL make ) failure which results
in commutator vulnerability to flashing doesnt happen.
Bogie
clearances measurement procedure should be inspected in the shop :
Above shows Gap b/w bump
stop and U/F.
Above shows Vertical
and Lateral Gap between STOP and U/F .
Shown above is the Loaded height
of secondary spring.
Gap between
axle box and bogie frame is measured .
Ensure No loco is dispatched with outstanding NCs on bogie
clearances.
Gear and wheel pressing force should be examined
Following is
the picture of practical measurement method :-
Depending upon interference between axle dia and bore dia, this
force varies.
It still
remains to be studied how we can increase this force .
