KNF N 811, Перевод оригинальных инструкций по эксплуатации и установке

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Diaphragm vacuum pump N 89/N 811/N 814/N 815 Servicing
Translation of original Operating and Installation Instructions, english, KNF 121242-121509 04/20 27
Change the diaphragm and valve plates/sealings in the following
sequence:
a) Remove pump head
b) Change diaphragm
c) Change valve plates/sealings
d) Refit pump head
Proceed as follows (see Fig. 9 and Fig. 10 for type ranges N 89 /
N 811, Fig. 9 and Fig. 12 for type ranges N 814, or Fig. 9 and Fig.
11 for type range N 815):
a) Remove pump head
1. Make a mark ( M ) on the head plate ( 3 ), Intermediate plate ( 2 )
and housing (
1
). This helps avoid incorrect assembly later.
2. Undo the 4 screws ( 4 ) in the head plate and lift the head plate
with the intermediate plate off the pump housing.
3. Only for models with dc models with dc motors (o cooling fan):
Remove cover ( 5 ) from pump housing after loosening the four
screws.

On these models, which have no fan, where reference is
made to turning or holding the cooling fan, the necessary
operations must be carried out by turning or holding the
counterweight (
13 ).
b) Change diaphragm
1. Turn the fan to bring the diaphragm ( 8 ) to top dead center.
2. Lift the edge of the diaphragm and, gripping it on opposite
sides, unscrew it by turning anti-clockwise.
3. Type ranges N 89/ N 811:
Take the diaphragm spacer(s) ( 10 ) off the threaded portion of
the diaphragm and retain them.
Type range N 814:
Take the diaphragm support (
9 ) and the diaphragm spacer(s)
(10), off the threaded portion of the structured diaphragm and
retain them.
Type range N 815:
Take the diaphragm support (
9
) and the diaphragm spacer(s)
( 10 ), and disc spring ( 11 ), off the threaded portion of the struc-
tured diaphragm and retain them.
4. Check that all parts are free from dirt and clean them if neces-
sary (see Chapter 8.2. Cleaning).
5. Type ranges N 89/ N 811:
Put the diaphragm spacer(s) ( 10 ) on the thread of the new dia-
phragm.