Filling with lubricant
1. Fill the lubricant on both sides until the max. fill level is reached
(see chapter “Filling with lubri-
2. Screw in the filler screws again.
– Tightening torque:
max. 32 Nm
7.4 Cleaning the suction chamber
WARNING
Risk of crushing from rotating parts
Fingers and hands may be caught by rotating pistons within the connection flange. This results in se-
vere injuries.
► Keep limbs out of the reach of the roots pump.
NOTICE
Property damage from incorrect cleaning procedure
Flushing fluid and process media that enters the bearing and oil chambers will stick.
► During the cleaning processes, always protect all bearings with sealing gas in order to prevent a
contamination of the lubricant and bearing chambers.
The clearance between pistons and housing are within a tenth of a centimeter range. Sustained, accu-
mulating contamination has the following effect:
● the friction heat inside the roots pump increases
● the power consumption of the roots pump increases
● the pistons jam
Procedure
1. Dismantle the pipes from the vacuum and fore-vacuum connections.
2. Clean the suction chamber and the overflow channel with suitable brushes and cleaning agents.
3. After cleaning, completely remove remaining fluids using absorbent materials, and dry the suction
chamber.
4. After cleaning, mount all pipes.
5. Screw in the drain screws.
7.5 Cleaning the overflow valve
Cleaning is only possible on the variant with overflow valve
No cleaning is intended for the variant with "blocked overflow valve".
Required tools
● Allen key,
WAF 10
● Calibrated torque wrench (tightening factor ≤ 2.5)
Maintenance
44/60
