MS-Series Two-Case > Meter Maintenance > Servicing the Drive Components

Before continuing to the procedures below, it's important to heed the following cautions and warnings as given in Maintenance Requirements.

This section includes the following topics:

•Removing the Dust Cover

•Servicing the Adjuster and Adjuster Drive Assembly

•Servicing the Packing Gland

•Packing Gland Retaining Plate

Removing the Dust Cover

NOTE: Prior to removing the dust cover, see both the warnings above and the Safety Procedures topic.

Follow this procedure to remove the dust cover:

1.Cut the dust cover seal wire with side cutters.

2.Remove the dust cover screws with a 5/16" wrench or slotted screwdriver.

3.Remove the dust cover.

Servicing the Adjuster and Adjuster Drive Assembly

Remember to Reassemble to the Original Position

Make sure to return the adjuster drive gear to its original position when reinstalling or the meter counter will run backwards. The gear will be set either below or above the packing gland pinion.

Follow this procedure to remove the adjuster and adjuster drive assembly:

1.Record the adjuster micrometer setting and note the adjuster drive gear position.
2.Also, carefully note the adjuster drive gear position. The gear engages the packing gland pinion from below (shown) or above. The gear must be reinstalled in its original position or the register counter will run backwards.
3.Use a flat-blade screwdriver to loosen (or remove) the two upper and two lower retaining spring screws.
4.Remove the drive assembly. If there is a need to remove the entire counter adapter assembly, remove the 4 screws located at the bottom end of the assembly.
5.Remove the adjuster from the top of the meter by removing the single screw holding it in place. The adjuster can then be rotated clockwise and removed from below.
6.Remove the two packing gland retaining plate screws with a 5/16” socket and ratchet driver extension or 5/16-inch nut driver. NOTE: It is not necessary to completely remove the stack from the meter to service the packing gland.
7.Pull out the packing gland. There is an O-Ring for the packing gland which may not come out with the packing gland. If it does not come off with the packing gland, it will be located in the packing gland well.
The packing gland may be taken apart by removing the retaining ring from the gear end of the assembly.

Servicing the Drive Components

After prolonged use, the packing gland may show leakage from the metering chamber. Leakage is a sign of wear, resulting from the type of product being metered, the operating temperature, and other system conditions. If the packing gland shows leakage, it should be replaced or repaired. The packing gland can be serviced in the field.

The Retaining Plate

The retaining plate has four holes:

•Two that are drilled 1.5” on center

•Two that are drilled 1.625” on center.

Turn the retaining plate until the holes match up with the threads to determine which orientation is correct for the meter being serviced.