MS-Series Two-Case > Installation & Operation > Reversing the Meter Registration

The direction of flow is specified by the customer when the meter is ordered. The standard direction of flow is from left to right when facing the front of the meter. A red tag labeled INLET is affixed to the meter before shipment, and this label indicates the inlet side of the meter.

If the meter is equipped with a strainer, air eliminator, and/or valve, each component must be moved to the correct side of the meter when reversing the direction of flow. The strainer and air eliminator should always be located on the inlet side of the meter. Valves should always be located on the outlet side of the meter. Some parts of the valve may require repositioning. See the valve manual for more information.

Check the register when installing the meter for the first time. If the register counts DOWN (numbers decrease), then the direction of registration must be reversed by either reversing the position of the adjuster drive gear–or by reprogramming the direction of flow using the Lap Pad (for LectroCount electronic registration). Consult the LectroCount Operation Manual provided in the Owner Information Packet.

Reverse the drive to the register by reversing the position of the adjuster drive gear relative to the pinion gear of the packing gland.

Refer to the figures below and follow this procedure to reverse the meter registration:

1.Remove the dust cover. See the Removing the Dust Cover procedure in Servicing the Drive Components.

2.Remove the retaining ring (4) with a screwdriver or pliers.

3.Remove the two retaining spring screws (1) with a standard screwdriver.

4.Remove the retaining spring (2).

NOTE: For M-15®, M-25®, M-30®, and M-40® models, loosen the single set screw.

5.Remove the drive shaft (3) with the adjuster drive gear assembly, including the (4) Retaining Ring and (5) Adjuster Drive Gear.

6.Remove the adjuster drive gear (5) and turn it 180° so that it is upside down from the original installation position. The bushing (7) supports the adjuster drive gear in the lower position. The retaining ring (4) supports the adjuster drive gear in the upper position.

7.Reassemble the parts in reverse order. Ensure that the adjuster drive gear meshes with the packing gland pinion gear (6) without being too tight. There should be a little play in the gear teeth. Place the retaining ring (4) into the groove on the drive shaft (3), regardless of the adjuster drive gear position. The packing gland pinion gear to adjuster drive gear ratio is either 1:1 or 2:1. In the 2:1 ratio, the pinion of the packing gland is smaller in diameter.