Action
described in document
Inspec-
tion
BA
Mainte-
nance
level 1
BA
Mainte-
nance
level 2
MM
Mainte-
nance
level 3
MM
Required
material
Interval
daily
≤ yearly
≤ 2 years
≤ 4 years
Replace the filter in the OME
(where present) as prescribed in
the operating instructions
■
as re-
quired
Maintenance level 2 – dismantling and cleaning
Dismantle and clean vacuum
pump, replace seals and the follow-
ing wear parts:
● Wear parts, vacuum safety
valve (hydraulic piston)
● Wear parts for exhaust valve
(valve flap, valve buffer)
● Wear parts for gas ballast
valve (valve flap)
● Vane springs
■
Mainte-
nance kit 2
Maintenance level 3 – overhaul
Dismantle and clean vacuum
pump, replace seals and all wear
parts:
● Vane
● Valves, springs, and sight
glass
● Silencer nozzle
● Check the coupling and re-
place as necessary
■
Overhaul kit
Tbl. 8:
Maintenance intervals
7.3 Changing the operating fluid
Pfeiffer Vacuum recommends determining the precise service life of the operating
fluid in the first operating year.
The service life may deviate from the reference value specified depending on thermic and
chemical loads, and the accumulation of suspended particles and condensate in the oper-
ating fluid.
The usable life of operating fluid is dependent on the area of application of the rotary vane vacuum
pumps.
Instructions for when operating fluid should be changed
● The vacuum pump does not reach the specified ultimate pressure.
● Operating fluid is perceptibly polluted, milky, or cloudy when viewed through the sight glass.
● It is possible to detect thermal aging of the operating fluid from its color identification number (ap-
plies to mineral oils only).
Safety data sheets
You can obtain the safety data sheets for operating fluids from Pfeiffer Vacuum on request,
or from the
Pfeiffer Vacuum Download Center
Maintenance
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