31GA01208_002_C0 - 11/2016 - © Leybold
Maintenance
5.3 Monitoring the Oil Level
During operation of the TRIVAC-B-DOT the oil level must always remain bet-
ween marks (9/2) and (9/3) on the oil-level glass. The amount of oil must be
checked and topped up as required.
Check and top up oil only after having shut down the pump first.
Please note the safety information given in Section 0.3 und 0.4.
Pumps which have not directly been delivered from Leybold, e.g. in sys tems,
may have been filled with oils different from DOT-4. In this case a refill with
DOT-4 may cause problems. Therefore check before the refill the kind of oil
in the pump and fill in only suitable oil or change the oil.
When operating the TRIVAC in connection with the exhaust filter with lubri-
cant return (ARS 40-65) the checking intervals are extended.
When using the oil float switch (LSS) remote monitoring of the lubricant is
possible.
Connect the oil float switch as follows:
1 0 V
2 +24 V
With reaching the lower oil level limit the switch passes a 24V-signal, but
does not switch off the pump.
5.3.1 Checking the Condition of DOT-4
If gases or liquids dissolved in the oil result in a deterioration of the ultimate
pressure, the oil can be degassed by allowing the pump to run for approx.
30 min. with the intake port closed and the gas ballast valve open.
Please note the safety information given in Section 5.4.
CAUTION
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