Pfeiffer DUO 3 - Fig. 15: Remove;Fit Rotary Vane Vacuum Pump Cap

Prerequisites
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Fresh operating fluid filled
Required tools
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Allen key, WAF 5
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Calibrated torque wrench (tightening factor ≤ 2.5)
Required aids
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Collection receptacle (> 0.5 l)
Changing operating fluid for cleaning
1. Operate the vacuum pump with the gas ballast open, until it is warm.
2. Perform an operating fluid change.
3. Check the pollution level and repeat the changing of the operating fluid if necessary.
4. Replace the corresponding filter elements wherever the accessory is installed.
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Fig. 15: Remove/fit rotary vane vacuum pump cap
1 Hexagon socket screw (2×) 4 Pumping system
2 Cap 5 Stand
3 O-ring
Removing the cap
1. Drain the operating fluid.
2. Unscrew the hexagon socket screws from the cap.
3. Remove the cap from the stand in axial direction.
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Take care with the o-ring between cap and stand.
4. Collect any leaking operating fluid.
5. Dispose of operating fluid according to applicable regulations.
Cleaning the pumping system and cap
1. Clean the pumping system from the outside without cleaning agent.
2. Clean the cap from the inside without cleaning agent.
Installing cap
1. Insert the O-ring in the groove in the cap.
2. Install cap on stand.
3. Tighten the hexagon socket screws.
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Tightening torque: 6.0 Nm.
4. Screw in the drain screw.
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Be careful with the o-ring.
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Tightening torque: 6.0 Nm
5. Fill with operating fluid and check the fill level.
6. Screw in the filler screw.
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Be careful with the o-ring.
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Tightening torque: 0.3 Nm
Maintenance
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