KNF N 143 AN.12 E, Инструкция по эксплуатации и установке

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Diaphragm Pumps N 143/186.12 Servicing
Translation of original Operating and Installation Instructions, english, KNF 121610-121613 07/16 23
2. Only for two-headed pumps.
Remove the pneumatic connection (.3 models), or connections
(.1.2 models) between the pump heads, loosen the union nuts
(Fig. 1/
8 , p. 11 or Fig. 2/ 8 , p. 11 or Fig. 3/ 8 , p. 12) to do so.
3. Mark the position of head plate (D), intermediate plate (C),
intermediate ring (B) and housing (A) relative to each other by
a drawing line with a felt-tip pen. This helps avoid incorrect as-
sembly later.
4. Undo the six hexagon socket head cap screws (E); lift off head
plate (D) and intermediate plate (C) with valve plate (G); re-
move valve plate from intermediate plate.
5. Remove the O-ring (F) from the head plate (D); remove the O-
ring (H) from the intermediate plate.
6. To undo the retainer plate (J), use the wrench for retainer plate
to turn it anti-clockwise; remove retainer plate and working dia-
phragm (L).
If the retainer plate cannot be loosened, because the dia-
phragm support (N) turns with it, carry out step 7 first. In that
case clamp the diaphragm support to loosen the retainer plate.
7. Undo the six hexagon socket head cap screws (M); remove
intermediate ring (B).
8. Remove the O-ring (P) from the intermediate ring (B).
9. Undo the hexagon socket head cap screw (K); remove the
diaphragm support (N).
10. Remove the O-rings (R) and (T) from the diaphragm support
(N).
11. Remove safety diaphragm (S).
12. Inspect all parts for dirt and clean them if necessary.
Assembling
1. Press the beaded edge of the new safety diaphragm (S) into
the groove in the diaphragm support (N).
2. Fit a new O-ring (T) in the shaft of the diaphragm support (N).
3. Push the diaphragm support (N) into the connecting rod and
secure it with head cap screw (K).
4. Fit the new O-ring (P) in intermediate ring (B); secure the O-
ring with retaining clips so that it cannot fall out during assem-
bly.
5. Make certain that the outer edge of safety diaphragm (S) is
seated on the housing (A); now place intermediate ring (B) on
the housing (A) according to the marks made previously; tight-
en the screws (M) lightly.
6. Now remove the retaining clips, and tighten the screws (M)
diagonally hand-tight.