Waukesha Bearings CQ Tilting Pad Thrust Bearings - Manual (Page 6)

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uppermost to allow its removal for machining. Whilst the spacer plate is detached, the
bearing should not be moved, to prevent the levers from coming loose.
Each thrust bearing spacer plate should be machined on the external face to reduce its
thickness by the appropriate amount.
It is advised that on no account should the thrust bearings be dismantled after the initial
set-up operation except in circumstances where this can not be avoided.
6.5.Temperature Sensors
If temperature sensors are provided in the thrust bearings, their location will be shown
in the contract drawing.
Great care should be taken when installing and dismantling the thrust rings to ensure
that the sensor leads are not damaged by sharp bends or nipping between two parts.
The leads should also be kept well clear of moving elements in the machine.
6.6.'O' rings
The 'O' rings (items 9 & 10) fitted to the stems of the pillars and pad stops are primarily
intended to retain these components in the cage ring during assembly and dismantling.
They also restrict oil leakage and therefore should be fitted to avoid excessive oil flow
through the bearing.
7. Bearing wear
If the thrust bearings are installed in accordance with these instructions and are operated
within the design conditions specified in the contract (and/or drawing), no measurable
wear should occur during prolonged service; the only change could be a dulling of the
whitemetal surface. It is recommended that when this dulling has spread to more than
one half of the pad surface, the thrust pads should be replaced.
The minimum whitemetal thickness on the thrust pads is of the order of 0.5 mm on the
smallest pads up to 2 mm on the larger sizes. It must be emphasised that any
measurable movement of the collar in an axial direction (say 0.05 mm or more)
indicates that the bearing is not functioning correctly and an inspection should be made
immediately. This is particularly important if the axial movement occurs over a short
period of time.
Ref. CQB/2001/A
 Waukesha Bearings/2001