Edwards nEXT 730D User Manual

magnec bearing adjust
er nut. Supporng the preload tool body in posion while
performing the preload check is recommended.
Apply pressure by pushing the test plunger unl a change in preload can be detected.
Releasing the test plunger will return the preload to its original posion. Pressing and
releasing the test plunger slowly while performing this check is recommended.
Detecon of the bearing preload can be recognised by a disnct sound. This may be
accompanied by a sensory feel through the tool and pump body. If a change in preload
cannot be detected, it may be possible to carry on with the service but with cauon.
Only for nEXT1230H
If no sound can be detected at the nEXT1230H, a mul meter can be used to detect the
change of the preload.
Put one banana plug connected to the mul meter in the hole of the test plunger and
connect the other wire of the mul meter to the pump housing e.g. by connecng it
with the earth screw of the housing. Measure the electrical resistance.
When the force applied at the test plunger is lower than the preload there is no
electrical connecon between the test plunger and the housing.
When the force applied at the test plunger is bigger than the preload there is an
electrical connecon between the test plunger and the housing.
The set preload is measured at the moment when it changes from no electrical
connecon to electrical connecon.
06/2021 - ©Edwards Limited
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300872820_002_C2 - Preload check

Edwards nEXT 730D Specifications

General

Brand	Edwards
Model	nEXT 730D
Category	Water Pump
Language	English