１２
2)-2 Removing Diaphragms
(1)
Grasp the rim of the diaphragm and rotate it in an anti-clockwise direction to
remove it. Remove the spacer attached to the rear of the diaphragm. (Photo 4.)
Note: Always wear gloves to perform this task. Do not lose the spacer.
Note: Diaphragm removal is easier performed with two people.
(2)
Apply a small amount of vacuum grease to the hexagonal set screw (M10
×
25) on
the rear side of the new diaphragm and on the spacer removed in step (1). Fasten
the spacer to the rear side of the diaphragm. (Photo 6) Grease will prevent the
screw from galling.
(3)
Rotate the new diaphragm in a clockwise direction until it stops. Tighten a further
5°-10° from that position. (Photo 5.)
Note: Take care not to over tighten.
2)-3 Fitting Pump Heads
(1)
Place the pump head on the casing so that the inlet side (slot) is positioned on top
(Photo 7) and tighten temporarily in place with the four hexagonal bolts (M8
×
25).
(2)
Turn the motor shaft by hand until the connecting rod reaches top dead center.
(Photo 8,9.)
Note: The diaphragm is closest to the pump head at top dead center.
Photo 4
Photo 5
Photo 6
To remove
To fasten
Diaphragm
Casing
Pump head
When one
side is top
dead center
the other is
bottom dead
center
Exhaust side:
holes
Photo 7
Photo 8
Photo 9
Motor shaft
Top dead center
Bottom dead center
Inlet side: slot
Metal plate of
diaphragm
Spacer
position
Hexagonal set screw
(M10 x 25)
