Heidolph VAC control automatic - Manual (Page 62)

62
E
Replace diaphragm
Lift diaphragm carefully.
 As required, move piston rod to upper dead end by depressing the cocking disc.
 Do not use sharp tools to lift diaphragm.
Introduce special tool underneath diaphragm.
Depress cocking disc until reaching lower dead center.
Force special tool against cocking disc and unscrew
cocking disc with diaphragm.
 If old diaphragm wont detach from back-up disc, try to
us gasoline or petroleum.
 Check for shims originally installed, use the same
number for reassembly.
Introduce new diaphragm between cocking disc and back-
up disc.
 Caution: Light-colored side of diaphragm points
towards cocking disc.
Explosion view: pump head
housing
bearing flange
diaphragm
back-up disc
diaphragm
diaphragm
cocking disc
with screw
cover
piston rod
valve
lid