Valve Plates/Seals; Carefully Insert A Small Screwdriver Between The Housing; The Edge Of The Diaphragm Slightly; Grasp The Diaphragm (9) And Unscrew It Counterclockwise - KNF N86.18 Manual De Instrucciones

Diaphragm pump N86.18 / N811.18
1 Housing
2 Intermediate
plate
4 Head plate
screw
7 Valve plates/
seals
8 Diaphragm
9 Conrod plate
10 Shim ring(s)
Translation of Original Operating and Installation Instruction, KNF 121435-121438
02/23
b.) Replacing the diaphragm
4
9
10
Fig.7: Replacing the diaphragm

1. Carefully insert a small screwdriver between the housing

(1) and the outer edge of the diaphragm (8). Then lever up

the edge of the diaphragm slightly.

2. Lift the diaphragm (8) on opposing side edges. Then
grasp the diaphragm (8) and unscrew it counterclockwise

by about two turns.

3. Hold the pump in one hand so that the pump head points

downwards. Then turn the diaphragm (8) all the way out
counterclockwise.
4. Remove the conrod plate (9) and the shim(s) (10) from the
threaded bolt of the diaphragm (8) and put them to one
side.

5. Check all parts for soiling and clean the parts if necessary

(for further information, see Chapter 9.2 Cleaning [} 29]).
6. Push the conrod plate (9) and the shim ring(s) (10) onto
the threaded bolt of the new diaphragm (8).
7. Screw the new diaphragm (8) with conrod plate (9) and
shim(s) (10) clockwise onto the connecting rod and hand-
tighten.
Servicing
2
8
1
7
35
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