Impeller Assembly and Shaft Replacement
IMPELLER ASSEMBLY AND SHAFT REPLACEMENT
If you are replacing an existing Badger Meter sensor and have already calibrated your flow monitor/endpoint, no calibration
changes are necessary . For installation of a new flow monitor or for relocation of a sensor in a new pipe size, refer to the
calibration instructions in this manual .
1 . Depressurize and vent the pipe, and remove power to the installation from which the sensor is to be removed .
2 . Remove the clevis pin .
3 . Remove the sensor from the tee .
OTEE:
N
Note the impeller blade orientation relative to the flow arrows . To maintain proper calibration, the impeller must
be reinstalled in the same manner with the impeller blades pointing toward the flow source as indicated by the
flow arrows .
4 . To remove the old impeller blade assembly, push the old shaft out of the sleeve with the new shaft (or small diameter rod)
just far enough to grab the end with a pair of pliers, and pull the shaft completely out . The impeller assembly will now be free,
and will drop out .
5 . Inspect the shaft and bearings for wear and replace as necessary .
6 . See
below . To reinstall, position the impeller in the cavity, oriented so that the impeller blades point in the flow
direction (as described in the
NOTE
above) . The flow direction arrow on the top of the sensor housing should point
downstream with the impeller blades pointing upstream .
7 . Carefully push the shaft through the housing and impeller, taking care not to damage the bearings . Make sure the shaft is
inserted far enough so that it clears the housing on each side of the impeller housing .
OTEE:
N
If the shaft is not carefully installed, the bearing can be deformed, preventing free rotation .
8 . Inspect the O-rings for damage and replace as necessary . Clean the O-rings and the sleeve, and relubricate with silicone
grease from the packet provided, or use another acceptable lubricant .
9 . Install the sensor into the tee so the flow arrow points in the direction of the actual flow .
10 . Install or replace the clevis pin .
This completes the replacement procedure . The system can now be repressurized and tested .
NOTE DIRECTION OF ARROW
USE PLIERS HERE
NOTE DIRECTION OF
IMPELLER
USE METAL PIN TO
REMOVE CERAMIC SHAFT
Figure 2: Impeller Assembly and Shaft
Page 9
February 2018
SEN-UM-01664-EN-10
