1
2
Fig. 13:
Hose clamps and clamping claws
1 Hose clamp
2
Clamping claw on valve cluster
Procedure
1. Open integral hinge on connection holder.
2. Loosen oval-head screw on connection holder by no more than one full rotation ensuring that it
does not unscrew completely from the hexagon nut.
3. Unscrew oval-head screws and clamping washers on head cover hood.
4. Remove head cover hood to the front.
5. Lay the vacuum pump carefully down onto its side so that the pump heads being serviced are fac-
ing upward.
6. Support vacuum pump beneath motor.
7. Pry the hose clamp on the connection hose over to the opposite side.
8. Remove hose of hose connection.
9. Unscrew countersunk screws on clamping claws.
10. Remove clamping claws.
– Head covers remain mounted.
11. Completely remove valve clusters together with cup springs, including connecting hose, hose clips
and connection holders as necessary.
12. Ensure correct mounting orientation of valves.
13. Inspect valves and O-rings for damage.
7.6.2 Removing diaphragms from MVP 070-3 C
NOTICE
Damage to diaphragms due to incorrect handling
Incorrect handling or using the wrong tools when changing diaphragms can cause damage to dia-
phragms of the vacuum pump.
► Do not use pointed or sharp-edged tools.
► Do not excessively bend diaphragms.
Required tools
● Allen key,
WAF 5
● Diaphragm key
WAF 66
Required consumables
● Alcohol or cleaning solvent, if necessary
Maintenance
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