Required tools
● Open-end wrench,
WAF 17
● Allen key,
WAF 5
● Calibrated torque wrench (tightening factor ≤ 1.6)
Procedure
1. Replace wear parts (valves) according to spare part package.
2. Insert valves into head cover.
– Ensure correct mounting orientation and materials of valves.
3. Insert head cover with valves into housing cover.
4. Mount housing cover onto vacuum pump.
5. First, screw on the cylinder screws of the housing cover loosely by hand, alternating screws in a
diagonal pattern.
6. Then tighten the cylinder screws of the housing cover, alternating screws in a diagonal pattern.
– Tightening torque:
12.0 Nm
7. Mount the hose connection.
8. Prevent the hose fitting from turning using open-end wrench WAF 20.
9. Fit fitting with open-end wrench WAF 17.
7.5 Replacing diaphragms and valves of MVP 070-3
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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