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 />
z) HEAD STOCK SPRING HANGER BRACKETS<br />
WAGON MAINTENANCE MANUAL<br />
Page 28 of 121<br />
It is fitted to the headstock of the trolley frame. Four brackets are<br />
required for each trolley. It consists of following parts:<br />
Sr. Name of the Part No. Per<br />
Trolley<br />
Material<br />
1. Side plate outer 4 Steel 42WC to IS : 2062<br />
2. Side plate inner 4 --do--<br />
3. Cover plate 4 --do--<br />
4. Top ribs 4 --do--<br />
5. Bottom ribs 4 --do--<br />
6. Ferrule 4 --do--<br />
7. Bush 4 --do--<br />
Side Plate Outer: It is 8 mm thick plate cut to a polygon having five sides and<br />
welded to the channel of the head stock perpendicular to it. One of the sides<br />
out of the five is circular in shape.<br />
Inner Side Plate: It is similar to outer plate except that near the vertical end,<br />
it has been joggled to triangular shape towards the sole plate of the trolley<br />
frame.<br />
Cover plate: It is made of 6 mm thick plate bent to angular shape matching<br />
the profile of 3 sides of the inner and outer plates. It has been welded to the<br />
inner and outer plates joining them together.<br />
Top Ribs: It is made of 12 mm thick plate and cut to polygon shape<br />
having six sides. It is welded in the center to the cover plate at right angle.<br />
One of its other side is welded to the end plate of the bogie side frame.<br />
Bottom Rib: It is made of 12 mm thick plate cut to a polygon shape having<br />
the five sides. It is welded to the cover plate similar to the top rib and of its<br />
other side is welded to the bottom end plate of the bogie side frame.<br />
One end of the spring is attached to the Centre spring hanger bracket<br />
and the other end to the head stock spring hanger through the shackle<br />
assembly. Shackle pin of shackle assembly passes through bush of ferrule &<br />
transfers load.<br />
602 C. MAINTENANCE OF SUB-ASSEMBLIES<br />
a) MAINTENANCE OF CENTRE PIVOT ASSEMBLY<br />
The inner surface of the centre pivot bottom and the outer surface of<br />
the centre pivot top are liable to wear in service. After certain period the<br />
surfaces may no longer be hemispherical. These two hemispherical surfaces<br />
have a common radius of 200 mm. It can be reduced in thickness by 3 mm. In
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