55
M
aint
ena
nc
e
Diaphragm replacement
Necessary tools
• An adjustable wrench or spanner
• A hexagon wrench
• A torque wrench
NOTE
Pay attention not to loose diaphragm spacers. A few diaphragm spacers may be inserted between the
retainer and plunger for the adjustment of a diaphragm location. Note that the number of diaphragm spacers
provided varies at different pumps.
Run the pump and set the stroke length to 0%. Then stop the pump.
Loosen the fitting nuts and remove the suction tube, dis-
charge tube, and air bleed tube.
Remove the pump head with a hexagon wrench.
Unscrew the diaphragm from the plunger (pump shaft).
Slide the retainer and diaphragm spacer(s) onto
the screw of the new diaphragm.
Plunger
Diaphragm spacer
Diaphragm
Retainer
3
2
4
5
1
Wear part replacement
Fitting nut
Air bleed tube
Discharge tube
Suction tube
Pump head
Содержание EHN-B11-NAE
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