PANDROL CD200 IQ, Operation And Maintenance Manual

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OPERATION AND MAINTENANCE MANUAL I ENG_OMM_CD200IQ_P03 I 2023-03-16
@Pandrol 2023
Fig 113. Microscopic cracks Fig 114. Cavities
Cavities
Rolling contact fatigue causes microscopic
subsurface cracks which develop into a localised
network, Fig 113.
Over a long period small sections or spalls break
away leaving cavities, Fig 114.
Record the number and length of the cavities. Take
action if the length of any cavity exceeds 15 mm, or if
two cavities are within 50 mm of each other and their
combined length exceeds 15 mm. Re-profile wheels
to remove cavities and cracks, otherwise replace the
wheels.
Fig 111. Maximum allowed wear
Fig 112. Wheel with crack
Cracks
Cracks normally have a jagged saw tooth type
of surface profile with sharp edges. Cracks will
normally form at the tread chamfer in an axial
direction (across the thread ”Fig 112. Wheel with
crack”.
No cracks are permitted. Replace wheels unless the
cracks can be completely removed by re-profiling.
Description Klausul A
Limit for false flange
The maximum allowed wear och the thread must not
exceed 2 mm. If the wear exceeds 2 mm the wheel
need to be re-profiled or replaced.