Servicing
Diaphragm Vacuum Pumps N 813
32
Translation of original Operating and Installation Instructions, english, KNF 121240-121506 09/19
a) Removing pneumatic head connections (once for all pump
heads)
N 813.3 AN__:
5. Remove pneumatic connection (
12
): Use a 14 mm spanner to
release the unions (
13
) on each head, and remove the pneu-
matic connection upwards.
N 813.4 AN__:
1. Remove pneumatic connection (
12
): Use a 14 mm spanner to
release the unions (
13
) on each head, and remove the pneu-
matic connection upwards.
2. Release both pneumatic connections (
14
) with a 17 mm open-
ended spanner, and remove them.
N 813.5 ANE:
1. Remove pneumatic connection (
12
): Use a 14 mm spanner to
release the unions (
13
) on each head, and remove the pneu-
matic connection upwards.
2. Release both pneumatic connections (
14
) with a 17 mm open-
ended spanner, and remove them.
3. Open both pneumatic connections (
15
) with a 17 mm open-
ended spanner, and remove them.
b) Removing cover plate
1. Undo the 4 screws and remove the cover plate (
5
) from hous-
ing (
1
) (N 813.3 AN__: 1 cover plate; N 813.4 AN__, and
N 813.5 ANE: each two cover plates).
c) Removing the pump head (for each head separately)
1. Make a mark (
M
) on the ribbed plate (
3
), intermediate plate (
2
),
and housing (
1
) with a felt-tip pen. This helps avoid incorrect
assembly later.
2. Undo the 4 screws (
4
) in the ribbed plate and lift the ribbed
plate with the intermediate plate off the pump housing.
d) Changing diaphragms
1. Turn the counter weight (
11
) to bring the structured diaphragm
(
8
) to top dead centre.
2. Lift the edge of the diaphragm and, gripping it on opposite
sides, unscrew it by turning anti-clock-wise.
3. Take the diaphragm spacer(s) (
9
) off the threaded portion of
the structured diaphragm and put them on the thread of the
new structured diaphragm (
8
).
4. Check that all parts are free from dirt and clean them if neces-
sary (see section 6. Cleaning).
5. Turn the counter weight (
11
) until the connecting rod (
10
) is at
the top dead centre.
Содержание N 813.3 AN.29DC-B
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