Liquid Controls M-MA Meters - Manual (Page 16)

1. Remove the counter bracket screws with a box wrench or
socket driver. The counter bracket can be removed with
or without removing the adjuster assembly.
2. Turn the meter on either the inlet or outlet side. Let
it stand to allow the product to drain from the meter
chamber.
3. Locate the drain plugs on the front and rear covers.
Remove the drain plugs using an allen wrench. Let the
meter stand to allow product to drain from the front and
rear covers.
4. Use a socket wrench or box end wrench to remove the
screws securing the front cover. Remove the screws
that hold the rear cover. The number of screws will vary
depending on meter size.
5. Remove the front and rear covers.
6. Carefully remove the O-rings / flat gaskets from front and
rear of the housing.
7. Use the rotor gear wrench (or a socket driver) to remove
the right displacement rotor gear screw and washer.
Hold a spare displacement rotor gear between the right
displacement rotor gear and the blocking rotor gear to
keep them from turning (if unavailable, use a shop rag
between gear teeth).
8. Use the rotor gear wrench (or a socket driver) to remove
the blocking rotor screw and the packing gland driver
held by the screw. Hold the spare gear between the left
displacement rotor gear and blocking rotor gear.
9. Use the rotor gear wrench (or a socket driver) to remove
the left displacement rotor gear screw and washer. Hold
the spare gear between the right displacement rotor gear
and the blocking rotor gear.
Undamaged Buna or Viton O-rings may be reused. Flat
gaskets and PTFE O-rings should always be replaced
and never reused.
O-rings & Flat Gasket Replacement
dIsasseMblInG the Meter
MA-4, M-5, and MA-5 old style models, M-60 and M-80
current models have a driven reduction gear attached with
a shoulder bolt to the center of the front bearing plate.
MA-4, M-5, and MA-5 old style models, M-60 and M-80
current models have rotor gears on the meter back.
All other models have rotor gears are on the front.
Drain Plug
disassembling Mechanical output Meters
16