Ulvac DA-41D Instruction Manual page 23

Bottom dead Diaphragm
center
Photo 7
(6) Detach the diaphragm from the main unit. The edge of the diaphragm at the top dead center
position (circumference portion) can be grabbed.
* When one diaphragm is pushed down (bottom dead center), another diaphragm comes up (top
dead center).
(7) Grab the edge of the diaphragm and turn it counterclockwise to detach the diaphragm.
(8) Remove remaining diaphragms likewise.
CAUTION
(9) Wipe off dirt on the tap portion of the connecting rod with solvent cleanly.
(10) Apply small quantity of vacuum grease on hexagon socket head cap screws (M8 x 18) portion on
back of the new diaphragm (to prevention of scoring of a screw) and mount it on the connecting rod
by turning clockwise. (Photo 10)
Top dead
center
Photo 8
● When it is hard to detach, grab it by two people to work.
● There is a risk that the connecting rod falls into pump.
● It is convenient if insert the pump head and hexagon
socket head cap screw (M6 x 25) for fixing to the tap
portion of connecting rod after detached diaphragm.
(Photo 9)
〇
Good
example
Photo 9
Never turn and pulling it up.
example
Photo 10
13
Hexagon socket
head cap screw
(M6 x 25)
×
Bad
(Photo 7)
(Photo 8)