>>> 'pumps' problem from bob -- Mon Jan  8 13:58:29 1990 <<<

There are two current pump problems within the Microlab.

1. The pump on tylan11 has failed.

2. Tom Booth reports the roughing pump on the cpa is now at 40 mtorr.
   It is useable however it's base pressure should be around 5 mtorr.
   James will look into this problem.

>>> 'pumps' problem from bob -- Tue Jan 16 07:34:40 1990 <<<

Tom Booth reports the roughing pump on the cpa is now at 40 mtorr.
The cpa remains useable however the reason it's base pressure is
30 mtorr too high. This problem does not effect the use of the cpa.

>>> 'pumps' problem from bob -- Tue Jan 16 11:09:26 1990 <<<

lam2 pump will be checked for a high frequency whine.
The base pressure of the cpa roughing pump will be checked.

>>> 'pumps' problem from rnorman -- Wed Jan 17 07:12:36 1990 <<<

The foreline mech pump in the hld is leaking oil onto the floor; I
cleaned up the oil for now. This is the same pump I had to add oil to
when I rebuilt the hld.

Other pump problems:
 Lam2 blower makes a high pitch whine intermittantly; possibly needs
 some Fomblin added to bearings.

>>> 'pumps' problem from bob -- Mon Jan 22 07:22:35 1990 <<<

New 4l490 belts were installed on the 1397 pump associated with the
randex.

The hld pump has been replaced with a non leaking pump.
The hld is up.

>>> 'pumps' problem from bob -- Mon Jan 22 07:24:07 1990 <<<

There is  noise from the bearing on lam2's blower. This need
to be investigated ASAP.
James Parrish is attending to this.

>>> 'pumps' problem from parrish -- Fri Jan 26 15:14:25 1990 <<<

problem:    noise at the rear bearings of blower of Lam2

cause:      need bearings repacked

solution:   removed end plate and repacked the bearings
            system is up.

>>> 'pumps' problem from rnorman -- Fri Feb  9 09:30:50 1990 <<<

The foreline pump on the hld is not pumping down below 80 mtorr,
as such, the hld will not cross over to the DP.

>>> 'pumps' problem from rnorman -- Fri Feb  9 11:29:08 1990 <<<

I ment the rough pump on the hld is not pumping below 80 mtorr.

>>> 'pumps' problem from rnorman -- Mon Apr 16 09:53:05 1990 <<<

The cryo on the randex is getting a thermal short on the top half.  IT
will need to be removed and inspected.

>>> 'pumps' fix from voros -- Wed Apr 18 09:08:20 1990 <<<

Randex cryo pump (Id 310) has been replaced by the one off of iona.

>>> 'pumps' problem from rnorman -- Mon Apr 23 07:07:21 1990 <<<

The mechanical pump on the randex base pressure seams to be a little
high after it was left roughing at 100 torr last week.  The oil may be
low.

>>> 'pumps' fix from parrish -- Tue May  8 11:06:57 1990 <<<

problem:   Randex rough pump pumping at high base pressure        

cause:     system was left pumping at 100 torr over night.

soution:   pump low in oil,added oil,pressure went down. 
