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 />
The CASNUB bogie assembly consists of the following components:<br />
WAGON MAINTENANCE MANUAL<br />
Page 4 of 121<br />
i. Wheel set with Cartridge Bearing<br />
ii. Axle Box/ adapter, retainer bolt & side frame key assembly<br />
iii. Side frames with friction plates and brake wear plates<br />
iv. Bolster with wear liners<br />
v. Spring plank, fit bolts & rivets<br />
vi. Load bearing springs and snubber springs<br />
vii. Friction shoe wedges<br />
viii. Centre pivot arrangement comprising of Centre pivot top, Centre pivot<br />
Bottom, Centre pivot pin, Centre pivot retainer & locking arrangement<br />
ix. Side Bearers<br />
x. Elastomeric Pad<br />
xi. Bogie Brake Gear<br />
xii. Brake Beam<br />
a) WHEEL SET WITH CARTRIDGE BEARING<br />
The initial batch of CASNUB bogie was fitted with cylindrical roller<br />
bearing axle box and matching wheel set. However standard AAR taper<br />
cartridge bearings have been subsequently standardised for these bogies.<br />
Maintenance requirement of cartridge taper roller bearing have been issued<br />
under “Instruction for inspection and maintenance of Cartridge Taper Roller<br />
Bearing fitted on Cast Steel Bogies”, Technical Pamphlet No. G-81 by RDSO.<br />
M/S NEI Jaipur to their Drawing No. 92-4289A supplies cylindrical<br />
roller bearing axle boxes fitted on CASNUB bogies. The maintenance<br />
Instructions to be followed as indicated in Drg. No. M 33128.<br />
Wheel profile used had been standard 1 in 20 taper after the root<br />
radius, earlier. However, currently a worn wheel profile has been prescribed to<br />
reduce wheel wear and increase wheel life. The worn wheel profile for new<br />
wheel is as per Drg No. WD-88021. During re-profiling, wheels should be<br />
turned as per intermediate profile having varying wheel flange thickness<br />
selecting the appropriate flange thickness out of the four flange thicknesses so<br />
that minimum material is removed at the time of turning. These are as per Drg.<br />
No. WD-89060- S/2.<br />
Wheel diameter for new wheel is 1000 mm. However, for CASNUB<br />
22W (retrofitted), maximum permissible wheel diameter is 956 mm.<br />
Condemning wheel dia is 906 mm for all versions but with suitable packing.
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