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PIPS II Owners Manual and Users Guide
5.8.
Replacing the MDP Oil Cartridge
The MDP requires the oil cartridge to be changed at least once a year.
However, if a high- pitched squeal begins, the oil cartridge should be changed
immediately.
The oil cartridge consists of a stack of felt discs saturated with oil and is
replaced as a unit. Changing the cartridge requires the Chamber to be vented
to atmosphere and the MDP to be completely removed from the PIPS II. This
provides an opportunity to service other parts of the vacuum system.
NOTE:
The oil in the MDP is for lubrication of the bearings only, and does
not come in contact with the vacuum chamber hence eliminating any concern
for hydrocarbon contamination.
5.8.1.
To Remove the MDP
1.
Shut down the power to the PIPS II.
Wait at least 10 min to allow the MDP to come to a complete stop. Then vent
the Work Chamber by opening the Vent valve. Unplug the power cable from
the power entry module.
2.
Remove the control cable from the MDP.
Loosen the 2 screws in the D-sub connector and unplug the cable.
3.
Remove the Vac-valve assembly.
Loosen and remove the compression fitting on the back of the Vac-valve
assembly, this will separate the Vac-valve assembly from the tubing that
connect the DP. Loosen and remove the KF clamp and centering ring from the
exhaust port in order to remove the Vac-valve assembly. Carefully place the
Vac-valve assembly on the electronics enclosure, being careful not to kink the
nylon tubing.
4.
Loosen the 4 MDP mounting screws on the support plate.
These screws retain the flange clamps used to lock the MDP to the manifold.
Remove two of the screws and clamps completely; then support the MDP
from the underside with one hand while removing the other two screws and
clamps.
5.
Lower the MDP and remove it from inside the cabinet.
