15
MVP 055-3C
1
Housing cover
2
Head cover
3
Diaphragm spring washer
4
Con-rod
6
Housing panel
9
Diaphragm support washer
10 Double diaphragm II
11 Inlet and outlet valve seal II
14 Square connecting screw (not shown in the drawing)
16 Countersunk screw
17 Countersunk screw
23 Connecting hose
26 Cheesehead screw
40.1 Gas ballast elbow union
40.2 Rubber cap for gas ballast
elbow union
11
9
23
26
1
11
2
3
10
4
6
17
Changing the Diaphragms on MVP 055-3C
➡
Dismantle pump stages as per Section 6.2.2.
➡
In addition, the front housing cover panel 6 must be
dismantled.
➡
Using a standard trade face spanner (size 40/4) turn
diaphragm support washer 9 thereby loosening diaphragm
10.
➡
Remove diaphragm spring washer 3 with square
connecting screw 14 (not shown in the drawing),
diaphragm 10 and diaphragm support washer 9.
➡
Check that square connecting screw 14 is still firmly
positioned in diaphragm spring washer 3 and tighten if
necessary (left-hand thread).
➡
Fit new diaphragm 10 between diaphragm spring washer 3
and diaphragm support washer 9.
➡
Refit diaphragm 10 with spring washer and support washer
in reverse order.
➡
Fit housing cover 6.
➡
To fit the PTFE connecting hose 23, tighten the metal lock
nut by hand and then by a half a turn with an Allen key.
V
40.2
40.1
