BOGIES AND SUSPENSION - South Central Railway

CHAPTER 6 – BOGIES AND SUSPENSION
SCROLL
IRON
SHACKLE PLATE
WAGON MAINTENANCE MANUAL
X
X
SPRING
SHACKLE PLATE
SCROLL
IRON
EYE
THE DIAMETRICAL CLEARANCE
BETWEEN SCROLL IRON, SHACKLE
PLATE & SHACKLE PIN NOT TO EXCEED
1.05 mm WHEN NEW AND 4 mm MAX
Fig. 6.5 SCROLL IRON AND SHACKLE PLATE
Page 52 of 121
THE DIAMETRICAL CLERANCE BETWEEN
SPRING EYE & SHACKLE PIN NOT TO
EXCEED 1.15 mm WHEN NEW & 3 mm MAX
SPRING EYE
SECTION
X-Y
LATERAL
CLEARANCE
NOT TO EXCEED
1.5 mm. WHEN NEW
AND 3 mm MAX.
If the clearances are found beyond permissible limits; the shackle pin,
shackle plate and scroll iron should be replaced as the case may be. The
shackle pin normally be replaced when it is worn out 1 mm in dia. below the
lower nominal size viz, at 26.6 mm for BG and 20.6 mm for MG. Broken/
cracked, deficient and wrong size shackle pins should be replaced/made good.
Bent shackle pins should also be replaced. It is difficult to detect shackle pin
manufactured out of wrong and sub standard material. In case of doubt, it
should be sent to metallurgical laboratory for test and if necessary, the whole
lot should be rejected. While manufacturing, 2 mm radius at the root of the
head and 4 mm at the inner corners of the cotter hole should be ensured. The
same should also be checked during service. In absence of there radii shackle
pin will be prone to breakage. At the time of POH in the workshop, shackle
pins must be replaced. Old shackle pins should be inspected and those up to &
above 27 mm dia. for BG and 21 mm dia for MG and also suitable otherwise
should be normalised and handed over to store department for open line use.
c) ACTION TO BE TAKEN BY CMT
i) He will make a regular programme to examine the shackle pins being
procured from trade to ensure that the pins have been manufacture
from correct material and specification and that there is no
manufacturing defect.
ii) For the purpose of examination, every purchased lot along with the
purchase order, particulars and firm address detected that they are
correct to the sizes. Matter to be brought into the notice to Depot
Officer, Works Manager, Controller of Stores and CWE.
iii) In case the pins are manufactured in Railway workshops. CMT should
test a sample in raw material in advance to ensure that the correct raw
material is being used for manufacturing the pins. The manufacture of
shackle pins tested and certified fit by CMT.