Procedure
1. Prevent the hose fitting from turning using open-end wrench WAF 20.
2. Loosen fitting with open-end wrench WAF 17.
3. Dismantle the hose connection.
4. Unscrew the cylinder screws on the housing cover.
5. Remove housing cover with head cover ensuring that the head cover does not fall out of the hous-
ing cover.
6. Remove head cover with valves.
7. Remove valves from head cover.
8. If the valves are sticking to the housing cover, carefully detach the valves.
9. Inspect valves for damage.
7.4.2 Removing diaphragms from MVP 040-2
Prerequisite
● Head cover and valves dismantled
Required consumables
● Alcohol or cleaning solvent, if necessary
Procedure
1. Unscrew countersunk screw from vacuum pump connection rod.
– Countersunk screw fixed with low-strength adhesive.
2. Remove diaphragm clamping disk, diaphragm pair and diaphragm support disk.
3. Apply alcohol or cleaning solvent to release diaphragm pair from supporting washer if it has be-
come stuck.
4. Pay attention to spacer disks under diaphragm support disk.
– Use original spacer disks for each installation location when mounting.
5. Inspect diaphragm pair for damage.
7.4.3 Installing diaphragms for MVP 040-2
Spare parts required
● Overhaul kit
Required consumables
● Clean, dry cloth
● Adhesive, low-strength (e.g. Loctite 243)
Procedure
1. Clean all parts with a dry, clean cloth.
2. Replace wear parts (diaphragms) according to spare part package.
3. Place original spacer disks under diaphragm support disk.
4. Place 2 individual diaphragms on top of one another with the rough sides together.
– The labeled sides of both diaphragms must be legible.
5. Fit diaphragm clamping disk, diaphragm pair and diaphragm support disk onto countersunk screw.
6. Apply a little adhesive to thread of countersunk screw.
7. Tighten countersunk screw together with diaphragm clamping disk, diaphragm pair and dia-
phragm support disk on vacuum pump connection rod.
7.4.4 Installing vacuum pump MVP 040-2
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.
Prerequisite
● Diaphragms installed
Maintenance
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