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Chapter 7
Remove the bearing hub, turbine hub, and turbine from inside flow meter housing.
3.
Carefully clean any metal filings, residues, or foreign material from the turbine and hubs. Use pressurized
4.
air to blow metal filings and debris out of both hubs and turbine.
To confirm that the turbine and blades are not worn, hold the turbine bearing hub while spinning the turbine.
5.
The turbine should spin freely with very little drag.
If the bearing hub stud is adjusted or replaced, repeat step 4 to verify turbine fit before reassembling.
6.
Replace the turbine hub and retaining ring in the flow meter housing.
7.
Replace the turbine against turbine hub inside the flow meter housing so that the stud keys within the flow
8.
meter housing line up with the grooves in the hub.
Place the retaining ring on to lock bearing hub in place.
9.
Spin turbine by blowing on it.
a.
Tighten bearing hub stud until turbine stalls.
b.
Loosen the stud 1/3 of a turn. The turbine should be able to spin freely.
c.
Carefully direct a low pressure jet of air (5 psi [34.5 kPa]) through flow meter in the direction of flow and
10.
again in the opposite direction to verify that the turbine spins freely.
If there is drag, loosen the stud on the bearing hub 1/16 turn until the turbine spins freely.
11.
If turbine spins freely and the cables have checked out, but the flow meter still is not totalizing properly,
12.
verify that the sensor is threaded all the way into the flow meter body, and the orientation groove on top of
the sensor is parallel with flow meter body. if flow meter still does not totalize, replace sensor assembly.
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AccuFlow™ and AccuFlow HP™ Installation & Operation Manual
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