M & MA Series Meters
45
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are of a magnitude that preclude the elimination
of hydraulic shock with the use of a two-stage
slow closing valve, an impact-absorbing air
cushioning device can be added to further
dampen hydraulic shock.
Leakage from the cover
gasket
Gasket has been damaged due to shock pressure or
cover bolts have not been tightened sufficiently.
Replace gasket and tighten cover bolts correctly.
Product flows through meter
but the register does not
operate
Follow this procedure:
1. Check packing gland, and gear train.
2. If all meter parts are moving then problem is in
register. Faulty register should be checked and
repaired by trained mechanic.
3. Remove register from meter. If all meter parts
are moving but output shaft of adjuster
assembly is not, adjuster is worn and must be
replaced.
4. If totalizer numerals (small numbers) on register
are recording, but the big numerals are not
moving, register needs repair.
5. Packing gland gear not turning. Replace the
packing gland. This may be caused by starting
the flow too rapidly.
NOTE: For M-60® and M-80® meters, the drive
blade may be sheared.
Breaking teeth on timing
gears
This may result from the following:
·
Starting or stopping flow in meter too rapidly.
·
Pump bypass not adjusted properly
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