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Wear part replacement
* Wear part duration varies with the pressure, temperature and characteristics of the
liquid.
* The estimated life is calculated based on the continuous operation with ambient clean
water.
Before replacement
First release the pressure from the pump.
Stop the pump operation.
Rotate the adjusting screw two revolutions anticlockwise to open
the air vent port.
NOTE
Do not rotate it three revolutions or more. Otherwise, liquid may comes out from
the adjusting screw.
Check that liquid comes out from the air vent port and the internal
pressure has been released.
NOTE
The internal pressure may not be expelled completely as long as liquid does not
come out. In this case run the pump until the pressure is released.
* For the EHN-31, -36 and FC, the air vent port is not equipped. Install an air vent valve
on a discharge line and release the pressure by opening the valve. See page 23.
Valve set replacement
■
Discharge valve set dismantlement/assembly
Necessary tools
• Adjustable wrench or spanner
• 17mm Box wrench
• A pair of tweezers
*Un
fi
x the pump base before work.
1
2
3
Summary of Contents for EHN-R
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