BOGIES AND SUSPENSION - South Central Railway

CHAPTER 6 – BOGIES AND SUSPENSION
WAGON MAINTENANCE MANUAL
Page 117 of 121
the supply of wheels to Lifting section is from hand to mouth such pairing for the
day’s requirement has to be done in the tyre, turning section of the Wheel shop itself.
Pairing in Wheel shop also becomes necessary for special tyre of wheels received in
small numbers. When pairing is done in the Wheel shop, it becomes necessary to
turn such wheels even to lesser diameters than is required from the point of view of
wear. For such cases specific instructions should be given to turner of the Wheel
lathe.
The variation in tread diameter should be as per Clause2.8.14.2 of IRCA Part
III(2000).
J. WHEEL DEFECTS
The wheels are required to be withdrawn from service for the following major
defects:-
i) Reached condemning limits
ii) Flat places/skidded
iii) Flanges sharp/deep/thin
iv) Too insufficient radius at the root of flange
v) Gauge slack/tight
vi) Slack Tyre
vii) Cracked or broken
Defects i) to iv) mentioned above are detected with the help of tyre Defect
Gauge. Defect as in item (v) is checked by Wheel Gauge. Defect as in item (vi) is
checked by ringing test and defect as in item (vii) is determined by visual
examination.
Permissible maximum flat surfaces on tread are as under:
Wagon Type Permissible Flat Surface
BG Wagons 60 mm
MG Wagons 51 mm
a) THIN AND SHARP FLANGE
(i) For proper method of using Tyre Defect Gauge, please refer IRCA Part
III .
(ii) Wheel may be passed provided the minimum thickness of flange is 16
mm.
(iii) Wheel must not be allowed to run if flanges are worn to knife edge but
may be passed if the radius is not less than 5 mm.
(iv) Wheels with too small radius at the root of flange
should not be allowed to remain in service.