BOGIES AND SUSPENSION - South Central Railway
BOGIES AND SUSPENSION - South Central Railway
BOGIES AND SUSPENSION - South Central Railway
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CHAPTER 6 – <strong>BOGIES</strong> <strong>AND</strong> <strong>SUSPENSION</strong><br />
k) SIDE BEARER (TOP)<br />
WAGON MAINTENANCE MANUAL<br />
Page 24 of 121<br />
It is a plate of 300 x 100 x 25 mm size with two countersunk bolt holes<br />
size M-20 at a distance of 240 mm. The chamfered height of the bolt hole is<br />
12 mm. This plate is fastened to the underframe by means of two countersunk<br />
bolts of M-20 size.<br />
l) SPRING <strong>SUSPENSION</strong> ARRANGEMENT<br />
The spring suspension arrangement on BOX wagon is an improvement<br />
over the suspension of 4 wheeler wagons. The shackle plate has been replaced<br />
by long shackles and stones. The split cotter replaced by shackle pin retainer<br />
and split pin. The scroll iron replaced by brackets attached with the bogie<br />
frame. The spring buckle has a spigot at the bottom, which engages in a bush<br />
seat located at the crown of the Axle Box. For each spring, 4 vertical spring<br />
stops have been provided to restrict its movement in the vertical direction in<br />
the event of breakage.<br />
The load of the wagon Body including its contents and under frame is<br />
transmitted to the bogie frame through the central pivot arrangement. On the<br />
bogie frame, one central and two head stock brackets have been provided. The<br />
load is transmitted to the spring from these brackets through shackle pin,<br />
stone, shackles followed by stones on the spring and pin and the spring eye.<br />
From the top plate of the spring eye, the load is transmitted to the Axle box<br />
crown through spring plates buckle and its spigot.<br />
m) SHACKLE PIN<br />
It is secured in position by Retainer and split pin. The dia. of the<br />
shackle pin is 35 +0/ -0.5 mm. Starting from the head end of the shackle pin<br />
the stone is inserted followed by spring Eye/Bush Eye, stone again and<br />
shackle pin Retainer. Each shackle pin Retainer, which has a rectangular fork<br />
shape is further secured by a split pin. The Retainer fits on the two flat and<br />
parallel recesses of the shackle pin.<br />
n) SHACKLE STONE<br />
It is a solid block having a hole of 36 (+0.5/-0.0) mm dia. in the centre.<br />
On both sides, it has a semicircular forked end perpendicular to the axis of the<br />
hole. The radius of the circular portion of the forked end is 13.5 (-0.0/+0.5)<br />
mm. The shackle pin passes through the hole of the stone. The shackle stone<br />
has been made reversible so that both ends thereof can be used for longer life.<br />
One stone is provided on either side of the spring Eye/Bush of the spring<br />
suspension Bracket. The spring shackle sits on the circular portion of the<br />
stone.
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