I've had mixed results with replacing this bearing cover.  When discovered
out of place during a wick change, I've cleaned up the bearings delicately,
re-spaced the bearings with some small tool and pushed the holder back in
place over them with a tool of similar diameter to push evenly.  If the
turbo was sounding bad (either really noticeable or using a stethoscope to
listen closely)- thus the reason for the wick change (and the wick looked
bad), you may want to consider replacing the turbo.  I've had luck replacing
this bearing holder on healthy sounding turbo's and have had no subsequent
problems.  Good luck,

Andy


-----Original Message-----
From: Stable Isotope Geochemistry [mailto:[log in to unmask]] On Behalf
Of Glenn Piercey
Sent: Thursday, July 30, 2009 6:10 AM
To: [log in to unmask]
Subject: [ISOGEOCHEM] turbo pump problem

In the process of changing the oil wick on a Pfeiffer TMH 071 a bearing
spacer/holder has decided to come out with the old wick. Can we just push
this back into place or is this a more involved operation requiring sending
the pump to Pfeiffer? The old wick was grey in colour, this may have been
loose for some time, however, the bearings seem to be in good condition.
Would this part work its way loose if the wick was not properly seated
during the last service. Is it possible for the pump to run without this
bearing space/holder?

Any help appreciated, thanks.