BOGIES AND SUSPENSION - South Central Railway

CHAPTER 6 – BOGIES AND SUSPENSION
CASNUB 22NL, 22NLB & 22 HS bogies
WAGON MAINTENANCE MANUAL
Page 6 of 121
Wheel sets are provided with narrow jaw adapter, cartridge roller
bearing (WD-89025-S/1 for wheel sets).
CASNUB 22W (Retrofitted)
Bogies are provided with modified wide jaw adapters but these are not
interchangeable with CASNUB 22W and CASNUB 22WM.
The wear limits are given in Table 6.1.
d) SIDE FRAMES WITH FRICTION PLATES
Side frame column has been provided with 10 mm thickness Silico
Manganese Steel wear liners to IS: 3885 Pt.-I Gr. IV welded on the columns.
It must be ensured that the liners permitted in service up to a thickness of 6
mm only.
The new friction plate is to be held tight against the column face
during welding which should be done in down hand position. Start welding at
diagonal ends of the plate and work towards the centre. No paint or grease
should be applied on the friction plate.
The side frame should be checked for its wheelbase (distance between
centre lines of the jaw openings) and ensure whether the correct button
marking is left on the side frame. While pairing the side frame for a bogie, it
should be ensure that there should not be any difference between the numbers
of buttons on the two-side frames.
The wear limits are given in Table 6.1.
e) BOLSTER WITH WEAR LINERS
Bolster pocket has been provided with 8 mm thick silico manganese
Steel liners welded with pocket slope. The liners may be permitted in service
upto a thickness of 3 mm. The welded liners should be chipped off to prepare
the surface for welding new liners. No paint or grease should be applied on the
plate.
Some bogie bolsters such as those of CASNUB 22NLB &22HS bogies
have been provided with 5mm thick wear liners on land surfaces & same are
to be required to be replaced after 3mm wear.
The wear limits are given in Table 6.1.