If failure of Racers occurs in WAG9 locos, procedure to mount axle should be inspected in the shop.:
G9 Racer is induction heated before fitting over the axle journal. ( two racers on each side ).
Axle box and Racer Bearing in above and below snap.
Due to failure of induction heaters, gas heated racers may get the profile damaged and this may result in failure. B
The radial clearance measurement procedure ( different for SKF and FAG racers ) should be followed with the help of NO-GO gauges.
Castings need to be rejected during machining if there are large number of blow holes.
Blow holes in Centre Pivot of WAP4 ( Raj ) locos loo like this: