Removing the Turbo Measuring Element Assembly from the Cover Plate
1 Remove the O-ring and cage seal
2 Check for damage and clean or replace prior to reassembly
3 To remove the measuring element from the cover, remove the calibration shaft seal plug and the lock screw
4 Place the cover register-side down on a table or flat surface
5 Lightly tap or press the calibration shaft from the wet side out of the bore in the cover (2", 3" and 4" only) Do not strike
or bend the calibration linkage
6 The measuring element insert can be removed from the cover plate for service or replacement by removing the cage
set screws (quantity of one, except for the 6" size )
7 Holding the cover plate in one hand, rotate the thermoplastic element counter-clockwise until the bayonet-like tabs
are aligned with open areas of the cover plate (2", 3" and 4" only)
8 Remove the element from the cover plate
Removing the Magnet Carrier/Top Gear Set
1 To remove the magnet carrier from the measuring element insert, lift it off the stainless steel pin
2 Check the condition of the magnet and gear on the magnet carrier for damage or wear If significant wear or damage is
present, replace the magnet carrier
3 Remove the hold-down strap
4 Check the condition of the transmission shaft gear for damage or wear If significant wear or damage is present, replace
the gear
5 Lift the gear off the shaft
Removing the Straightening Vanes/Nose Cone
The straightening vanes are an integral part of the upstream and downstream nose cone assemblies
To gain access to them, remove the measuring element from the cover
Removing the upstream nose cone provides access to the rotor, calibration ring and the transmission assembly
To remove the nose cone:
1 Unscrew the upstream nose cone setscrew For 2", 3" and 4" meters, slide the calibration linkage into the cage
insert stop
2 Take hold of the nose cone/straightening vanes and turn them clockwise, thereby disengaging the calibration linkage
from the tab on the calibration ring and unlocking the bayonets of the nose cones from the cage (see
3 If the tab of the calibration ring has not disengaged the linkage, rotate the ring carefully by pushing the struts at the
interior of the element (between the straightening vanes and the rotor) Pull the nose cone assembly out from the
measuring element insert For 6" meters, remove the transmission gear by lifting it off the shaft, noting the alignment
of the D-shaped bore with the flat on the shaft (required to align for assembly)
4 Remove the retaining ring that holds down the calibration drive plate, located under magnet carrier magnet (see
Figure 8) Remove drive plate Rotate calibration ring until pin clears slot of cage Take hold of the nose cone/
straightening vanes and turn clockwise Pull the nose cone assembly out from the measuring element insert Remove
rotor assembly
Removing the Calibration Mechanism
To disassemble the calibration ring assembly:
1 Remove the calibration shaft seal plug and unscrew the calibration shaft lock screw from the cover plate
2 Remove the calibration shaft thrust washer and calibration shaft Press the calibration shaft out of the cover plate
from below
Servicing Parts and Assemblies
June 2016
RCS-UM-00076-EN-04
Page 14
