en Maintenance and repair
84 WILO SE 2019-10
Motor type Sealing chamber
White oil
T17.3L...K...
2.9l 98US.fl.oz.
T20.2 motor
T20.2M...G...
1.8l 61US.fl.oz.
T20.2M...K...
1.1l 37US.fl.oz.
9.3.2 Oil types
ƒ ExxonMobile: Marcol52
ƒ ExxonMobile: Marcol82
ƒ Total: FinavestanA80B (NSF-H1 certified)
9.3.3 Grease
ƒ Esso: UnirexN3
ƒ Tripol: Molub-Alloy-Food Proof 823 FM (USDA-H1 approved)
9.4 Maintenance intervals
To ensure reliable operation, maintenance tasks must be carried out regularly. Depend-
ing on the real ambient temperatures, maintenance intervals different from those men-
tioned in the contract can be defined! If strong vibrations occur during operation, the
pump and the installation must be checked regardless of the defined maintenance in-
tervals.
9.4.1 Maintenance intervals for normal
conditions
8000operating hours or after 2years at the latest
Visual inspection of
the connection
cables
Visual inspection of
accessories
Visual inspection of
the coating and
housing for wear
Function test of
monitoring devices
Sealing chamber oil
change*
Draining the leakage
chamber*
Asynchronous motors
T 20.2
• • • • • •
Permanent magnet motors
T 17.3...-P
• • • • o −
T 20.2...-P
• • • • o o
Key
• = Carry out maintenance measures, o = Carry out maintenance measure as instructed,
− = Maintenance measure omitted
* Note information in "Deviating maintenance intervals"!
15000operating hours or after 10years at the latest
ƒ Complete overhaul
9.4.2 Deviating maintenance intervals
Motors without Digital Data Interface
It is possible to install external sealing chamber control (pencil electrode) in motors
without Digital Data Interface. Change the oil as instructed if this monitoring type has
been installed!
Motors with Digital Data Interface
In motors with Digital Data Interface the sealing and/or leakage chamber is monitored
by capacitive sensors. The Digital Data Interface outputs a warning once the predefined
threshold has been reached. Carry out the corresponding maintenance measure if this
warning is displayed.
9.4.3 Maintenance intervals for harsh
conditions
Under harsh operating conditions, specified maintenance intervals must be shortened if
required. Harsh operating conditions include:
ƒ Fluids with long-fibre components
ƒ Turbulent inlet (e.g. due to air intake, cavitation)
ƒ Strongly corroding or abrasive fluids
ƒ Heavily gas generating fluids
ƒ Operation at an unfavourable duty point