Liquid Controls M-MA Meters - Manual (Page 18)

to remove the bearing plates and rotors:
1. Insert a screwdriver into each of the two notches near
the dowel pins. Gently pry the front bearing plate off the
dowel pins.
2. Grab the end of the blocking rotor extending out from the
front bearing plate, and pull the front bearing plate and
rotor assembly straight out from the housing.
3. Remove the remaining bearing plate. Insert a screwdriver
into each of the two notches near the dowel pins. Gently
pry the front bearing plate off the dowel pins.
4. Inspect and clean all critical surfaces: gear teeth, rotors,
and internal housing faces.
• Remove any crystalline formations using fine emery cloth or
a fine wire brush.
• Remove nicks and burrs on metal parts with a stone.
• Remove all grit and other foreign particles.
• Replace all parts that appear worn or damaged.
reassembling the Meter
to reassemble the bearing plates and rotors:
1. Replace the non-rotor gear bearing plate to the housing
with the bearing plate screws.
2. Insert the non-tapered ends of the three rotors into the
housing and onto its respective bore of the installed
bearing plate.
3. Place the remaining bearing plate over the three tapered
rotor ends and fasten it to the housing with the bearing
plate screws.
dIsasseMblInG the Meter / reasseMblInG the Meter
disassembling Mechanical output Meters
For MA-4, M-5, and MA-5 old style models, M-60 and
M-80 current models, pull rotor assembly with the rear
bearing plate from the housing. This will also remove the
drive reduction gear which is attached to the blocking rotor.
MA-4, M-5, and MA-5 old style models, M-60 and M-80
current models have a driven reduction gear attached by a
shoulder bolt in the center of the front bearing plate.
Be careful not to mar any of the surfaces.
Be Careful
Be careful not to mar or alter the shape of any of the
parts. Changing the shape of the parts may interfere
with their operation.
Be Careful
The rotor gears are on the rear bearing plate of MA-4, M-5,
and MA-5 old style models, M-60 and M-80 current models. On
all other models, the rotor gears are on the front bearing plate.
For MA-4, M-5, and MA-5 old style models, M-60 and M-80
current models, make sure that the teeth of the driving reduction
gear mesh with the teeth of the driven reduction gear.
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