Operation Manual / TPS44-F.. - TPS61-F..
8 Disassembly and assembly / 8.4 Axial clearance A and radial clear-
ance B
© Copyright 2020 . All rights reserved. HZTL2412_EN Rev.G March 2020
Identifying radial bearings
with a special bearing
geometry
The type of bearing can be determined by measuring the rotor run-out
time. To do so, the rotor must be pushed by hand, once to the left (L)
and once to the right (R), with a force as close to the same in both direc-
tions. The resulting run-out times until the rotor comes to a stop are
measured for the anticlockwise and clockwise rotations and then com-
pared. With standard radial bearings, the run-out time for anticlockwise
and clockwise rotating rotors is the same.
If one run-out time is at least 1.5times longer than the other, then radial
bearings with a special bearing geometry are installed. The following B
clearances are valid for these special bearings.
TPS57 TPS61
B minimum 0.46 0.52
B maximum 0.73 0.82
CAUTION
Clearances out of tolerance
Clearances out of tolerance and excessively worn components can be
the cause of serious damage to machinery and property.
u Have components assessed and, if necessary, replaced by an ABB
Turbocharging Service Station.
Page 97 / 113
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