Page 24/58IOM BiRotor Plus R27
9.4 - Removal of the Measuring Unit from the Instrument Body (B33 thru B38)
1. Turn the meter on end so that it stands on its outlet flange, this will also facilitate in
fully draining the instrument of process fluid.
2. Remove fasteners and lift off the inlet housing.
3. Remove housing O-ring.
4. Remove 2 fasteners from the Measuring Unit Assembly and replace with eyebolts.
Carefully lift the measuring unit assembly straight up until the measuring unit
assembly clears the outlet housing. USE CAUTION NOT TO HIT THE PULSE WHEEL
WITH THE CHAIN OR STRAPS.
5. Place the measuring unit in the horizontal position.
At this stage the assembly can be inspected for wear or damage. If the assembly had
jammed it may be possible to unblock the rotors by flushing it with a cleaning solvent or
kerosene without the need for further disassembly.
Further disassembly of the measuring unit for cleaning or inspection can be achieved
while maintaining clearance settings. This procedure is covered in the next section. To
fully disassemble the measuring unit proceed to Section 9.6.
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