Action Inspec-
tion
Mainte-
nance
level 1
Mainte-
nance
level 2
Mainte-
nance
level 3
Required
materials
Described in document OI OI MM MM
Interval daily ≤ yearly ≤ 2 years ≤ 4
years
Replace filter in external acces-
sory (where present), in accord-
ance with the respective operating
instructions
■
as re-
quired
Maintenance level 2 – RSSR change
● Partially dismantle the vacuum
pump
● Replace RSSR and coupling
half
Not applicable for vacuum
pumps with magnetic coupling
■ Operating flu-
id
RSSR set
Additional activities:
Dismantle and clean vacuum pump,
replace seals and the following
wear parts:
● Wear parts, vacuum safety
valve (hydraulic piston)
● Wear parts, exhaust valve
(valve flap)
● Wear parts, gas ballast valve
(valve flap)
● Vane springs
■
as re-
quired
Operating flu-
id
Maintenance
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
■ Operating flu-
id
Overhaul kit
Tbl. 6: Maintenance intervals
7.4 Change the operating fluid
WARNING
Health hazard and risk of environmental damage from toxic contaminated operating fluid
Toxic process media can cause operating fluid contamination. When changing the operating fluid,
there is a health hazard due to contact with poisonous substances. Illegal disposal of toxic substan-
ces causes environmental damage.
►
Wear suitable personal protective equipment when handling these media.
►
Dispose of the operating fluid according to locally applicable regulations.
CAUTION
Scalding from hot operating fluid
Danger of burns when draining operating fluid if it comes into contact with the skin.
►
Wear protective equipment.
►
Use a suitable collection receptacle.
Pfeiffer Vacuum recommends determining the precise service life of the operating
fluid within the first maintenance frequency.
The usable 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.
Maintenance
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