- 40 -
EN
951-180-074-EN Version
03, last updated
2019 / 07
9. Maintenanc
e, cleaning
9. Maintenance and cleaning
WARNING
System pressure
Lubrication systems are pressurized during operation. Lu-
brication systems must therefore be depressurized before
starting assembly, maintenance, or repair work, or any
system modifications or system repairs.
WARNING
Electric shock
De-energize the product prior to beginning work.
Electrical connections for the product may only be estab-
lished by qualified personnel authorized to do so by the
operator. The electrical operating conditions and regula-
tions (e.g., ATEX regulation, DIN,
VDE) must be observed.
WARNING
Hot surface
The hot surface of a motor may cause burns. Motor sur-
faces may only be touched with appropriate gloves or after
the motor has been shut off for an extended time.
9.1 Maintenance instructions
Careful and regular maintenance is required in order to detect and
remedy possibly malfunctions in time.
Note the following:
○
Only SKF Lubrication Systems Germany GmbH, Berlin Plant (see
masthead) or an ATEX specialist firm authorized by the Service
department of SKF Lubrication Systems Germany GmbH is al-
lowed to repair the gerotor pump unit.
○
Before recommissioning after a repair, check compliance with
the requirements of a conformity assessment body in accordance
with EC Directives 2014/34/EU and 99/92/EC.
○
Maintenance intervals for the gerotor pump unit must always
be determined by the system manufacturer/operator according
to the operating conditions and regularly reviewed and adapted
where necessary. SKF recommends continuous monitoring of the
parameters listed in the maintenance checklist.
○
A maintenance schedule must be drawn up for the safe operation
and long service life of the gerotor pump unit. This schedule must
ensure that the intended or permissible operating conditions and
parameters of the gerotor pump unit are observed during its
service life.
○
Changes in these parameters indicate wear, for example to the
electric motor, the coupling, or the pump. The cause must be im-
mediately determined and remedied.
○
The system/gerotor pump unit must be switched off in case of
changes beyond normal fluctuations in the intended operating
range.
○
Coupling parts should be replaced at least every 5 years. The
manufacturer's specifications should be given priority.
○
The deep groove ball bearings in the motor bearing assemblies
are sealed on both sides and pre-filled with grease as standard.
When installed horizontally and at an ambient temperature of
40°C, on 4- or more-pole motor this corresponds to a bearing
service life of 40,000 operating hours or a service life
of 20,000 operating hours on 2-pole motors. Before achieving
this
number of hours, the motor bearings or the motor should be re-
placed by SKF’s ATEX service.
For further information, see the operating instructions from the
motor manufacturer.
9.2 Safety measures before maintenance work
The following safety measures must be taken before any mainte-
nance or cleaning work:
○
Prevent access by unauthorized persons.
○
Mark the operating range.
○
Unlock the gerotor pump unit.
○
Lock the gerotor pump unit to prevent it from being restarted.
○
Check to ensure the gerotor pump unit is de-energized.
○
Cover adjacent live parts.
IMPORTANT NOTE
The condensation water drain device on the motor must not be
unscrewed while the AC motor is running. After turning off the
motor, there is a mandatory 10-minute waiting period; only after
this can the device be unscrewed.
The motor can be returned to operation after screwing in the
drain device; see the operating instructions from the motor
manufacturer.