BOGIES AND SUSPENSION - South Central Railway

CHAPTER 6 – BOGIES AND SUSPENSION
WAGON MAINTENANCE MANUAL
Page 90 of 121
To be able to introduce the procedure mentioned above, 2 soaking tanks with
perforated trays would be required, one for soaking new waste and the second for
reclaimed waste and the requirement of shallow containers would be three, one for
new soaked waste, another for reclaimed waste and the third for the mixed, new and
reclaimed waste. This would be the minimum requirement and may be increased
depending upon consumption of soaked waste. The steam heated vacuum waste
soaking plant is an alternative to the conventional method for preparation of soaked
waste, which is also in use on Railways.
The requisite quantity of cleared waste is placed in the soaking chamber and
the temperature maintained at about 200 o with 25 cms. of vacuum. After an interval
of 10 minutes which period has been found sufficient to remove the moisture from
waste, the requisite quantity of oil (the ratio of oil to waste being 4:1) is discharged
into the soaking chamber through the oil control valves. The oil flowing over the
perforated plate fixed to the inside of the lid, assists proper distribution. The soaking
time should be 40 minutes. No draining is necessary. Thoroughly impregnated
packing is thereafter ready and this should be transferred to a shallow container.
Steam soaking of the reclaimed waste to be carried out by adding 1 Kg. of oil
to 5 Kgs. of old waste. Soaking for a period of 10 minutes would be adequate. In the
case of old waste which may thereafter be transferred to a separate shallow container
for being used along with new steam soaked waste in the proportion already laid
down earlier.
A set of roll packing for each axle box consists of one back roll, two centre
rolls and one front roll. Their shapes, sizes and weights are indicated in figure 6.9.
The core of each roll may consist of reclaimed ready waste or of mixed ready
waste. This should then be covered with new ready waste (on bottoms or reeling
waste being pulled open to form long strings). Each roll must have standard density
and firmness and should be neither be soft nor too hard. Every roll must be passed
through a corresponding gauge to ensure the correct size. Frequent weighment of
rolls must be conducted to ensure reasonably correct weight.
D
C
B
A
Fig. 6.9 : DIMENSIONS OF ROLL PACKING
G
F
K
J