7 Maintenance
7.1 Maintenance Schedule
For the VARODRY products two types of maintenance are required:
1.
Belt change
2.
Pump overhaul
The belt change can be done by the user of the pump.(See instructions in
).
The pump overhaul requires special equipments and must be done by Leybold Service
only.
For determining the operation hours, the VARODRY is equipped with a battery powered
hour meter. In order to access the hour meter the pump cover has to be removed. (see
picture 3.2)
The lifetime of the battery is limited to 3-5 years. If the battery is empty the hour meter
needs to be repaced. Contact Leybold Service for hour meter replacement.
Maintenance
Interval (operation hours)
Ambient temperature:
0 °C-30 °C
Ambient temperature:
30 °C-40 °C
Belt change
6000 hours or 25000 start
cycles
4,800 hours or 25000 start cycles
Overhaul
24000 hours
19200 hours
Blow off valve inspection
(applications which form deposits
only)
6000 hours
4200 hours
7.2 Pump Timing Belt Change
The pump timing belt is subjected to wear and must be replaced after a defined operation
period (see maintenance schedule). The belt exchange can be either performed by
Leybold Service or by the pump user.
Accessories required:
▪
Replacement timing belt (50 Hz Versions: E6525604, 60 Hz Versions: E6525605)
▪
Belt replacement tool kit (EK6530942)
▪
Tools for disconnecting the vacuum pipework
▪
Allen key tool: 5 mm + 8 mm
▪
Spanners: 19 mm
▪
Torque wrench: 2.5 Nm
‑
40 Nm
▪
Soft brush for cleaning
300766038_002 - © Leybold
20
Maintenance
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