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 />
o) SPRING SHACKLE<br />
WAGON MAINTENANCE MANUAL<br />
Page 25 of 121<br />
It has a circular cross section of 25 +1.0/ -0.5 mm. It should not be<br />
finished. A shackle can also be made out of a bar by bending it to two ‘U’<br />
pieces and joining the ends by resistance welding. The effective length of the<br />
shackle is connected from the inner edges along its width. The top and bottom<br />
inner edges & side inner edge upto a length of 25 mm from top and bottom<br />
edges should be rough ground to a circular form to ensure proper contact with<br />
the stone.<br />
p) SHACKLE PIN RETAINER<br />
It is made in a forked shape that has varying cross section at different<br />
locations. The inside edges of the fork end is made to a rectangular shape<br />
having a semicircular closed end and on open end. The rectangular portion of<br />
the edges fit on the two flats of the shackle pin and the circular edges match<br />
the curved portion of the shackle pin. The open end has a split pin hole of 8<br />
mm dia. After fastening the stone in the assembly, the retainer is fitted on the<br />
shackle pin and is secured by the split pin.<br />
q) LAMINATED SPRING<br />
The weight of the wagon body including its contents, under-frame,<br />
bogie frame, is transmitted to the spring eye through the shackle suspension<br />
arrangement. From the spring eye, the weight is transmitted to the Axle Box<br />
crown, through the spring plates, Buckle and its spigot. The various aspects of<br />
the laminated spring viz. its material, cleanliness, maintenance and<br />
manufacturing practices, the rejection defects, defects noticed in service,<br />
precautions are to be taken. These are applicable to the laminated spring fitted<br />
on UIC Bogies. The special features of laminated Bearing spring for<br />
BOX/BCX and other similar type of wagons are given as under:-<br />
Ten plate bearing spring to IRS Drg.No.WA/SN-6302/WD-86007-S/1<br />
has been provided on BOX wagons. The spring buckle has a spigot at its<br />
bottom, which engages in the bush seat provided in the crown of Axle Box.<br />
The spring, as such, directly bears on the Axle Box Crown. In the original<br />
design, the top plate had rib and groove. Now, the Bearing spring has been<br />
modified to incorporate flat top plate with a clip at either end.<br />
r) SOLE PLATE TROLLEY FRAME<br />
It is a plate of 8 mm thickness.
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