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 />
WAGON MAINTENANCE MANUAL<br />
Page 19 of 121<br />
The sole plate is made of 8 mm thick plate. Other plates are also made of this<br />
material. The trolley frames were found to be having many welding defects. RDSO<br />
has issued detailed instruction vide No. R-7 for rectification of these welding defects<br />
on bogie frame.<br />
b) BOLSTER<br />
Bolster is welded at right angles to the two side frames. It alongwith<br />
head stock, keeps them at correct distance and maintain squareness and<br />
alignment of the bogie. It is a fabricated construction consisting of one top<br />
plate and one bottom plate and two vertical side plates.<br />
These are joined together to form a box section. In the centre where<br />
centre pivot is fitted, two stiffener plates have been provided at a distance of<br />
360 mm. Perpendicular to the vertical side plates. In the ends, near the side<br />
bearers it is strengthened suitably. The top and bottom plates are 12 mm thick<br />
and side plates are 8 mm thick made out of plate. Other plates used in the<br />
assembly are mostly 8 mm and 10 mm thick. The top plate is bent in the<br />
centre and the side plate is at suitably forming a well in the centre. In the<br />
centre portion the bogie pivot is welded and on both ends the side bearers are<br />
welded.<br />
c) HEAD STOCK<br />
The head stocks are welded at right angles to the sole plates at both<br />
ends. Head stock and bolster together maintain the required distance between<br />
the two sole plates and also ensure squareness and alignment of the bogie<br />
frame. The head stock is a channel section of 200x75 x 7.5 mm. It is suitably<br />
joined with the sole plate at both the ends. Two diagonals (one each on RH<br />
and LH) are also attached with it. The safety loop brackets are also welded to<br />
it in the central portion.<br />
d) DIAGONALS<br />
To absorb draw and buffing force, the bogie has been strengthened by<br />
providing two diagonals between the head stock and the bolster on its either<br />
ends. Thus there are total of 4 diagonals, 2 left handed and 2 right handed.<br />
The diagonal is made of the channel section of 125x65x6 mm web. They are<br />
suitably notched at both ends to fit the head stock and transoms. The diagonal<br />
is inclined. Its height from the rail level is higher near the bolster and lower<br />
near the head stock.
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