67
Ma
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Inspection
Inspection
Perform daily inspection and periodic inspection to keep pump performance
and safety.
Daily inspection
Check the following points. Upon sensing abnormal condition, stop operation
immediately and remove problems according to "Troubleshooting".
When wear parts come to the life limit, replace them by new ones. Contact us
or your nearest dealer for detail.
No.
States
Points to be checked
How to check
1 Pumping
• If liquid is pumped.
Flow meter or visual
inspection
• If the suction and discharge pressure
are normal.
Check speci
fi
cation.
• If liquid is deteriorated, crystallized or
settled?
Visual or audio
inspection
2 Noise and vibration • If abnormal noise or vibration occurs.
They are signs of abnormal operation.
Visual or audio
inspection
3 Air ingress from
pump head joints
and a suction line
• If leakage occurs.
• If discharge liquid includes air bub-
bles, check lines for leakage and
retighten as necessary.
Visual or audio
inspection
Periodic inspection
Retighten the pump head mounting bolts diagonally according to the following torque.
* Mounting bolts may loosen in operation. How fast the bolts start to loosen is depend-
ing on operating conditions.
Tightening torque
Model identi
fi
cation code
Torque
Bolts
EHN-B11•16•21
2.16 N•m
M4 Hex. socket head bolt
EHN-B31
2.55 N•m
M4 Hex. socket head bolt
EHN-C16•21
2.16 N•m
M4 Hex. socket head bolt
EHN-C31
2.55 N•m
M4 Hex. socket head bolt
EHN-C36
2.55 N•m
M5 Hex. socket head bolt
*A hexagon wrench can be used for a torque wrench. See page 33.
Summary of Contents for EHN-R
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