3. Place 2 individual diaphragms on top of one another with the rough sides together.
– The labeled sides of both diaphragms must be legible.
4. Place diaphragm pair and diaphragm support disk on the square of the diaphragm clamping disk.
5. Ensure correct seating of square in diaphragm support disk guide.
6. Place original spacer disks under diaphragm support disk.
7. Lift diaphragm pair at the side.
8. Using the diaphragm key, carefully reach through and grasp the diaphragm support disk.
9. Tighten diaphragm support disk with diaphragm key on vacuum pump connection rod.
10. Fit torque wrench onto diaphragm key (hexagonal, size 6).
11. Tighten diaphragm support disk.
– Tightening torque:
6 Nm
7.5.4 Installing vacuum pump MVP 070-3
NOTICE
Damage to valves during the exchange process
Incorrect installation of valves can cause damage to the valves as a result of sticking to the head cov-
er.
► Make sure that the valves have the correct mounting orientation.
► Ensure that valve flaps do not cover grooves in head cover or housing cover.
Prerequisites
● Diaphragms installed
● Vacuum pump positioned on its side and supported as necessary
Required tools
● Allen key,
WAF 5
● Calibrated torque wrench (tightening factor ≤ 1.6)
Procedure
1. Replace wear parts (valves) according to spare part package.
2. Position diaphragms to sit centrally and flush on the supporting surface of the housing opening.
3. Fit head cover on housing opening.
4. Align nose on head cover with notch in housing cover.
5. Insert valves and O-rings into head cover.
6. Make sure that the valves have the correct mounting orientation.
7. Mount housing cover onto vacuum pump.
8. Insert connecting pipe into opposite housing cover.
9. Ensure correct mounting orientation of O-rings in connection pipe grooves.
10. First, screw on the cylinder screws of the housing cover loosely by hand, alternating screws in a
diagonal pattern.
11. Then tighten the cylinder screws of the housing cover, alternating screws in a diagonal pattern.
– Tightening torque:
12.0 Nm
7.6 Replacing diaphragms and valves of MVP 070-3 C
NOTICE
Property damage from incorrect installation
Change in dead volume due to incorrect installation of the original spacer disks impairs the final vac-
uum or leads to bearing damage.
► During disassembly, keep the existing spacer disks separate per installation location.
► Reinstall the same number of original spacer disks per diaphragm head.
Avoid interchanging components
Always dismantle and mount only the pump head on one pump side in order to avoid inter-
changing the components.
The procedures are identical for both pump heads.
Maintenance
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