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 />
e) SAFETY LOOP BRACKETS<br />
WAGON MAINTENANCE MANUAL<br />
Page 20 of 121<br />
It is made of steel plate 8 mm thickness out to a suitable shape. At one<br />
of the ends it has got 13.5 mm dia hole. It is welded to the head stock channel<br />
near its central portion. Two brackets are fitted on each head stock. Thus a<br />
total of four brackets have been provided.<br />
f) BOGIE TRIMMER (OUTER & INNER)<br />
In the initial builds of MK-I and MK ‘O’ bogies the trimmer<br />
arrangement consists of a pipe between the diagonals, two cantilever arms and<br />
one tie attached to the pipe trimmer on one side and on the other side to head<br />
stock, in the case of outer trimmer. In case of inner trimmer, two pairs of<br />
cantilever arms are attached to the pipe trimmer. Due to welding failures in<br />
the regions, the design was altered and all the bogies, manufactured since<br />
1963-64, have been provided with channel type of trimmers. In this design,<br />
the outer trimmer consists of one cross channel connected in between two<br />
diagonals and two channels running between cross channel and bolster.<br />
There is also an additional pressing running transverse over the two<br />
longitudinal channels and one pair of brake suspension flats. In the case of<br />
inner trimmer, it consists of one cross channel between two diagonals and two<br />
longitudinal channels running between bolster and cross channel. This carries<br />
two pairs of brake suspension brackets.<br />
g) SAFETY LOOP BRACKETS<br />
Two safety loop brackets have been provided on outer trimmer and<br />
two on inner trimmer arrangement. It is a trapezium shaped plate of 8 mm<br />
thickness with a hole of 13.5 mm dia. in the centre. It is attached at suitable<br />
locations in the bottom of the longitudinal trimmer channel.<br />
h) CENTRE PIVOT ARRANGEMENT<br />
Centre pivot is of hemispherical design. The whole load on the centre<br />
point is borne by a fixed bolster that distributes the load directly to the<br />
laminated bearing springs and to the journals. There is no secondary<br />
suspension in these bogies. The centre pivot arrangement consists of the<br />
following :-<br />
I. Retaining ring<br />
II. Bogie centre pivot top<br />
III. Bogie centre pivot bottom<br />
IV. Centre pivot retainer<br />
V. Washer<br />
VI. Bogie centre pivot top (Bolts & nuts) - 4 Nos.<br />
VII. Dust shield for bogie centre pivot
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